{
Copyright (c) 1998-2005 by Florian Klaempfl
Member of the Free Pascal development team
This unit implements the basic code generator object
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
{# @abstract(Abstract code generator unit)
Abstreact code generator unit. This contains the base class
to implement for all new supported processors.
WARNING: None of the routines implemented in these modules,
or their descendants, should use the temp. allocator, as
these routines may be called inside genentrycode, and the
stack frame is already setup!
}
unit cgobj;
{$i fpcdefs.inc}
interface
uses
cclasses,globtype,
cpubase,cgbase,cgutils,parabase,
aasmbase,aasmtai,aasmdata,aasmcpu,
symconst,symbase,symtype,symdef,symtable,rgobj
;
type
talignment = (AM_NATURAL,AM_NONE,AM_2BYTE,AM_4BYTE,AM_8BYTE);
tsubsetloadopt = (SL_REG,SL_REGNOSRCMASK,SL_SETZERO,SL_SETMAX);
{# @abstract(Abstract code generator)
This class implements an abstract instruction generator. Some of
the methods of this class are generic, while others must
be overriden for all new processors which will be supported
by Free Pascal. For 32-bit processors, the base class
sould be @link(tcg64f32) and not @var(tcg).
}
tcg = class
public
alignment : talignment;
rg : array[tregistertype] of trgobj;
t_times : longint;
{$ifdef flowgraph}
aktflownode:word;
{$endif}
{************************************************}
{ basic routines }
constructor create;
{# Initialize the register allocators needed for the codegenerator.}
procedure init_register_allocators;virtual;
{# Clean up the register allocators needed for the codegenerator.}
procedure done_register_allocators;virtual;
{# Set whether live_start or live_end should be updated when allocating registers, needed when e.g. generating initcode after the rest of the code. }
procedure set_regalloc_extend_backwards(b: boolean);
{$ifdef flowgraph}
procedure init_flowgraph;
procedure done_flowgraph;
{$endif}
{# Gets a register suitable to do integer operations on.}
function getintregister(list:TAsmList;size:Tcgsize):Tregister;virtual;
{# Gets a register suitable to do integer operations on.}
function getaddressregister(list:TAsmList):Tregister;virtual;
function getfpuregister(list:TAsmList;size:Tcgsize):Tregister;virtual;
function getmmregister(list:TAsmList;size:Tcgsize):Tregister;virtual;
function getflagregister(list:TAsmList;size:Tcgsize):Tregister;virtual;abstract;
{Does the generic cg need SIMD registers, like getmmxregister? Or should
the cpu specific child cg object have such a method?}
procedure add_reg_instruction(instr:Tai;r:tregister);virtual;
procedure add_move_instruction(instr:Taicpu);virtual;
function uses_registers(rt:Tregistertype):boolean;virtual;
{# Get a specific register.}
procedure getcpuregister(list:TAsmList;r:Tregister);virtual;
procedure ungetcpuregister(list:TAsmList;r:Tregister);virtual;
{# Get multiple registers specified.}
procedure alloccpuregisters(list:TAsmList;rt:Tregistertype;const r:Tcpuregisterset);virtual;
{# Free multiple registers specified.}
procedure dealloccpuregisters(list:TAsmList;rt:Tregistertype;const r:Tcpuregisterset);virtual;
procedure allocallcpuregisters(list:TAsmList);virtual;
procedure deallocallcpuregisters(list:TAsmList);virtual;
procedure do_register_allocation(list:TAsmList;headertai:tai);virtual;
procedure translate_register(var reg : tregister);
function makeregsize(list:TAsmList;reg:Tregister;size:Tcgsize):Tregister;
{# Emit a label to the instruction stream. }
procedure a_label(list : TAsmList;l : tasmlabel);virtual;
{# Allocates register r by inserting a pai_realloc record }
procedure a_reg_alloc(list : TAsmList;r : tregister);
{# Deallocates register r by inserting a pa_regdealloc record}
procedure a_reg_dealloc(list : TAsmList;r : tregister);
{ Synchronize register, make sure it is still valid }
procedure a_reg_sync(list : TAsmList;r : tregister);
{# Pass a parameter, which is located in a register, to a routine.
This routine should push/send the parameter to the routine, as
required by the specific processor ABI and routine modifiers.
This must be overriden for each CPU target.
@param(size size of the operand in the register)
@param(r register source of the operand)
@param(cgpara where the parameter will be stored)
}
procedure a_param_reg(list : TAsmList;size : tcgsize;r : tregister;const cgpara : TCGPara);virtual;
{# Pass a parameter, which is a constant, to a routine.
A generic version is provided. This routine should
be overriden for optimization purposes if the cpu
permits directly sending this type of parameter.
@param(size size of the operand in constant)
@param(a value of constant to send)
@param(cgpara where the parameter will be stored)
}
procedure a_param_const(list : TAsmList;size : tcgsize;a : aint;const cgpara : TCGPara);virtual;
{# Pass the value of a parameter, which is located in memory, to a routine.
A generic version is provided. This routine should
be overriden for optimization purposes if the cpu
permits directly sending this type of parameter.
@param(size size of the operand in constant)
@param(r Memory reference of value to send)
@param(cgpara where the parameter will be stored)
}
procedure a_param_ref(list : TAsmList;size : tcgsize;const r : treference;const cgpara : TCGPara);virtual;
{# Pass the value of a parameter, which can be located either in a register or memory location,
to a routine.
A generic version is provided.
@param(l location of the operand to send)
@param(nr parameter number (starting from one) of routine (from left to right))
@param(cgpara where the parameter will be stored)
}
procedure a_param_loc(list : TAsmList;const l : tlocation;const cgpara : TCGPara);
{# Pass the address of a reference to a routine. This routine
will calculate the address of the reference, and pass this
calculated address as a parameter.
A generic version is provided. This routine should
be overriden for optimization purposes if the cpu
permits directly sending this type of parameter.
@param(r reference to get address from)
@param(nr parameter number (starting from one) of routine (from left to right))
}
procedure a_paramaddr_ref(list : TAsmList;const r : treference;const cgpara : TCGPara);virtual;
{ Remarks:
* If a method specifies a size you have only to take care
of that number of bits, i.e. load_const_reg with OP_8 must
only load the lower 8 bit of the specified register
the rest of the register can be undefined
if necessary the compiler will call a method
to zero or sign extend the register
* The a_load_XX_XX with OP_64 needn't to be
implemented for 32 bit
processors, the code generator takes care of that
* the addr size is for work with the natural pointer
size
* the procedures without fpu/mm are only for integer usage
* normally the first location is the source and the
second the destination
}
{# Emits instruction to call the method specified by symbol name.
This routine must be overriden for each new target cpu.
There is no a_call_ref because loading the reference will use
a temp register on most cpu's resulting in conflicts with the
registers used for the parameters (PFV)
}
procedure a_call_name(list : TAsmList;const s : string);virtual; abstract;
procedure a_call_reg(list : TAsmList;reg : tregister);virtual; abstract;
procedure a_call_ref(list : TAsmList;ref : treference);virtual; abstract;
{ same as a_call_name, might be overriden on certain architectures to emit
static calls without usage of a got trampoline }
procedure a_call_name_static(list : TAsmList;const s : string);virtual;
{ move instructions }
procedure a_load_const_reg(list : TAsmList;size : tcgsize;a : aint;register : tregister);virtual; abstract;
procedure a_load_const_ref(list : TAsmList;size : tcgsize;a : aint;const ref : treference);virtual;
procedure a_load_const_loc(list : TAsmList;a : aint;const loc : tlocation);
procedure a_load_reg_ref(list : TAsmList;fromsize,tosize : tcgsize;register : tregister;const ref : treference);virtual; abstract;
procedure a_load_reg_ref_unaligned(list : TAsmList;fromsize,tosize : tcgsize;register : tregister;const ref : treference);virtual;
procedure a_load_reg_reg(list : TAsmList;fromsize,tosize : tcgsize;reg1,reg2 : tregister);virtual; abstract;
procedure a_load_reg_loc(list : TAsmList;fromsize : tcgsize;reg : tregister;const loc: tlocation);
procedure a_load_ref_reg(list : TAsmList;fromsize,tosize : tcgsize;const ref : treference;register : tregister);virtual; abstract;
procedure a_load_ref_reg_unaligned(list : TAsmList;fromsize,tosize : tcgsize;const ref : treference;register : tregister);virtual;
procedure a_load_ref_ref(list : TAsmList;fromsize,tosize : tcgsize;const sref : treference;const dref : treference);virtual;
procedure a_load_loc_reg(list : TAsmList;tosize: tcgsize; const loc: tlocation; reg : tregister);
procedure a_load_loc_ref(list : TAsmList;tosize: tcgsize; const loc: tlocation; const ref : treference);
procedure a_load_loc_subsetreg(list : TAsmList;subsetsize: tcgsize; const loc: tlocation; const sreg : tsubsetregister);
procedure a_load_loc_subsetref(list : TAsmList;subsetsize: tcgsize; const loc: tlocation; const sref : tsubsetreference);
procedure a_loadaddr_ref_reg(list : TAsmList;const ref : treference;r : tregister);virtual; abstract;
procedure a_load_subsetreg_reg(list : TAsmList; subsetsize, tosize: tcgsize; const sreg: tsubsetregister; destreg: tregister); virtual;
procedure a_load_reg_subsetreg(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister); virtual;
procedure a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsreg, tosreg: tsubsetregister); virtual;
procedure a_load_subsetreg_ref(list : TAsmList; subsetsize, tosize: tcgsize; const sreg: tsubsetregister; const destref: treference); virtual;
procedure a_load_ref_subsetreg(list : TAsmList; fromsize, subsetsize: tcgsize; const fromref: treference; const sreg: tsubsetregister); virtual;
procedure a_load_const_subsetreg(list: TAsmlist; subsetsize: tcgsize; a: aint; const sreg: tsubsetregister); virtual;
procedure a_load_subsetreg_loc(list: TAsmlist; subsetsize: tcgsize; const sreg: tsubsetregister; const loc: tlocation); virtual;
procedure a_load_subsetref_reg(list : TAsmList; subsetsize, tosize: tcgsize; const sref: tsubsetreference; destreg: tregister); virtual;
procedure a_load_reg_subsetref(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sref: tsubsetreference);
procedure a_load_subsetref_subsetref(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsref, tosref: tsubsetreference); virtual;
procedure a_load_subsetref_ref(list : TAsmList; subsetsize, tosize: tcgsize; const sref: tsubsetreference; const destref: treference); virtual;
procedure a_load_ref_subsetref(list : TAsmList; fromsize, subsetsize: tcgsize; const fromref: treference; const sref: tsubsetreference); virtual;
procedure a_load_const_subsetref(list: TAsmlist; subsetsize: tcgsize; a: aint; const sref: tsubsetreference); virtual;
procedure a_load_subsetref_loc(list: TAsmlist; subsetsize: tcgsize; const sref: tsubsetreference; const loc: tlocation); virtual;
procedure a_load_subsetref_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsref: tsubsetreference; const tosreg: tsubsetregister); virtual;
procedure a_load_subsetreg_subsetref(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsreg: tsubsetregister; const tosref: tsubsetreference); virtual;
{ fpu move instructions }
procedure a_loadfpu_reg_reg(list: TAsmList; fromsize, tosize:tcgsize; reg1, reg2: tregister); virtual; abstract;
procedure a_loadfpu_ref_reg(list: TAsmList; fromsize, tosize: tcgsize; const ref: treference; reg: tregister); virtual; abstract;
procedure a_loadfpu_reg_ref(list: TAsmList; fromsize, tosize: tcgsize; reg: tregister; const ref: treference); virtual; abstract;
procedure a_loadfpu_loc_reg(list: TAsmList; tosize: tcgsize; const loc: tlocation; const reg: tregister);
procedure a_loadfpu_reg_loc(list: TAsmList; fromsize: tcgsize; const reg: tregister; const loc: tlocation);
procedure a_paramfpu_reg(list : TAsmList;size : tcgsize;const r : tregister;const cgpara : TCGPara);virtual;
procedure a_paramfpu_ref(list : TAsmList;size : tcgsize;const ref : treference;const cgpara : TCGPara);virtual;
{ vector register move instructions }
procedure a_loadmm_reg_reg(list: TAsmList; fromsize, tosize : tcgsize;reg1, reg2: tregister;shuffle : pmmshuffle); virtual; abstract;
procedure a_loadmm_ref_reg(list: TAsmList; fromsize, tosize : tcgsize;const ref: treference; reg: tregister;shuffle : pmmshuffle); virtual; abstract;
procedure a_loadmm_reg_ref(list: TAsmList; fromsize, tosize : tcgsize;reg: tregister; const ref: treference;shuffle : pmmshuffle); virtual; abstract;
procedure a_loadmm_loc_reg(list: TAsmList; size: tcgsize; const loc: tlocation; const reg: tregister;shuffle : pmmshuffle);
procedure a_loadmm_reg_loc(list: TAsmList; size: tcgsize; const reg: tregister; const loc: tlocation;shuffle : pmmshuffle);
procedure a_parammm_reg(list: TAsmList; size: tcgsize; reg: tregister;const cgpara : TCGPara;shuffle : pmmshuffle); virtual;
procedure a_parammm_ref(list: TAsmList; size: tcgsize; const ref: treference;const cgpara : TCGPara;shuffle : pmmshuffle); virtual;
procedure a_parammm_loc(list: TAsmList; const loc: tlocation; const cgpara : TCGPara;shuffle : pmmshuffle); virtual;
procedure a_opmm_reg_reg(list: TAsmList; Op: TOpCG; size : tcgsize;src,dst: tregister;shuffle : pmmshuffle); virtual;abstract;
procedure a_opmm_ref_reg(list: TAsmList; Op: TOpCG; size : tcgsize;const ref: treference; reg: tregister;shuffle : pmmshuffle); virtual;
procedure a_opmm_loc_reg(list: TAsmList; Op: TOpCG; size : tcgsize;const loc: tlocation; reg: tregister;shuffle : pmmshuffle); virtual;
procedure a_opmm_reg_ref(list: TAsmList; Op: TOpCG; size : tcgsize;reg: tregister;const ref: treference; shuffle : pmmshuffle); virtual;
{ basic arithmetic operations }
{ note: for operators which require only one argument (not, neg), use }
{ the op_reg_reg, op_reg_ref or op_reg_loc methods and keep in mind }
{ that in this case the *second* operand is used as both source and }
{ destination (JM) }
procedure a_op_const_reg(list : TAsmList; Op: TOpCG; size: TCGSize; a: Aint; reg: TRegister); virtual; abstract;
procedure a_op_const_ref(list : TAsmList; Op: TOpCG; size: TCGSize; a: Aint; const ref: TReference); virtual;
procedure a_op_const_subsetreg(list : TAsmList; Op : TOpCG; size, subsetsize : TCGSize; a : aint; const sreg: tsubsetregister); virtual;
procedure a_op_const_subsetref(list : TAsmList; Op : TOpCG; size, subsetsize : TCGSize; a : aint; const sref: tsubsetreference); virtual;
procedure a_op_const_loc(list : TAsmList; Op: TOpCG; a: Aint; const loc: tlocation);
procedure a_op_reg_reg(list : TAsmList; Op: TOpCG; size: TCGSize; reg1, reg2: TRegister); virtual; abstract;
procedure a_op_reg_ref(list : TAsmList; Op: TOpCG; size: TCGSize; reg: TRegister; const ref: TReference); virtual;
procedure a_op_ref_reg(list : TAsmList; Op: TOpCG; size: TCGSize; const ref: TReference; reg: TRegister); virtual;
procedure a_op_reg_subsetreg(list : TAsmList; Op : TOpCG; opsize, subsetsize : TCGSize; reg: TRegister; const sreg: tsubsetregister); virtual;
procedure a_op_reg_subsetref(list : TAsmList; Op : TOpCG; opsize, subsetsize : TCGSize; reg: TRegister; const sref: tsubsetreference); virtual;
procedure a_op_reg_loc(list : TAsmList; Op: TOpCG; reg: tregister; const loc: tlocation);
procedure a_op_ref_loc(list : TAsmList; Op: TOpCG; const ref: TReference; const loc: tlocation);
{ trinary operations for processors that support them, 'emulated' }
{ on others. None with "ref" arguments since I don't think there }
{ are any processors that support it (JM) }
procedure a_op_const_reg_reg(list: TAsmList; op: TOpCg; size: tcgsize; a: aint; src, dst: tregister); virtual;
procedure a_op_reg_reg_reg(list: TAsmList; op: TOpCg; size: tcgsize; src1, src2, dst: tregister); virtual;
procedure a_op_const_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tcgsize; a: aint; src, dst: tregister;setflags : boolean;var ovloc : tlocation); virtual;
procedure a_op_reg_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tcgsize; src1, src2, dst: tregister;setflags : boolean;var ovloc : tlocation); virtual;
{ comparison operations }
procedure a_cmp_const_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;reg : tregister;
l : tasmlabel);virtual; abstract;
procedure a_cmp_const_ref_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;const ref : treference;
l : tasmlabel); virtual;
procedure a_cmp_const_loc_label(list: TAsmList; size: tcgsize;cmp_op: topcmp; a: aint; const loc: tlocation;
l : tasmlabel);
procedure a_cmp_reg_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;reg1,reg2 : tregister;l : tasmlabel); virtual; abstract;
procedure a_cmp_ref_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; const ref: treference; reg : tregister; l : tasmlabel); virtual;
procedure a_cmp_reg_ref_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;reg : tregister; const ref: treference; l : tasmlabel); virtual;
procedure a_cmp_subsetreg_reg_label(list : TAsmList; subsetsize, cmpsize : tcgsize; cmp_op : topcmp; const sreg: tsubsetregister; reg : tregister; l : tasmlabel); virtual;
procedure a_cmp_subsetref_reg_label(list : TAsmList; subsetsize, cmpsize : tcgsize; cmp_op : topcmp; const sref: tsubsetreference; reg : tregister; l : tasmlabel); virtual;
procedure a_cmp_loc_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; const loc: tlocation; reg : tregister; l : tasmlabel);
procedure a_cmp_reg_loc_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; reg: tregister; const loc: tlocation; l : tasmlabel);
procedure a_cmp_ref_loc_label(list: TAsmList; size: tcgsize;cmp_op: topcmp; const ref: treference; const loc: tlocation;
l : tasmlabel);
procedure a_jmp_name(list : TAsmList;const s : string); virtual; abstract;
procedure a_jmp_always(list : TAsmList;l: tasmlabel); virtual; abstract;
procedure a_jmp_flags(list : TAsmList;const f : TResFlags;l: tasmlabel); virtual; abstract;
{# Depending on the value to check in the flags, either sets the register reg to one (if the flag is set)
or zero (if the flag is cleared). The size parameter indicates the destination size register.
}
procedure g_flags2reg(list: TAsmList; size: TCgSize; const f: tresflags; reg: TRegister); virtual; abstract;
procedure g_flags2ref(list: TAsmList; size: TCgSize; const f: tresflags; const ref:TReference); virtual;
{
This routine tries to optimize the op_const_reg/ref opcode, and should be
called at the start of a_op_const_reg/ref. It returns the actual opcode
to emit, and the constant value to emit. This function can opcode OP_NONE to
remove the opcode and OP_MOVE to replace it with a simple load
@param(op The opcode to emit, returns the opcode which must be emitted)
@param(a The constant which should be emitted, returns the constant which must
be emitted)
}
procedure optimize_op_const(var op: topcg; var a : aint);virtual;
{#
This routine is used in exception management nodes. It should
save the exception reason currently in the FUNCTION_RETURN_REG. The
save should be done either to a temp (pointed to by href).
or on the stack (pushing the value on the stack).
The size of the value to save is OS_S32. The default version
saves the exception reason to a temp. memory area.
}
procedure g_exception_reason_save(list : TAsmList; const href : treference);virtual;
{#
This routine is used in exception management nodes. It should
save the exception reason constant. The
save should be done either to a temp (pointed to by href).
or on the stack (pushing the value on the stack).
The size of the value to save is OS_S32. The default version
saves the exception reason to a temp. memory area.
}
procedure g_exception_reason_save_const(list : TAsmList; const href : treference; a: aint);virtual;
{#
This routine is used in exception management nodes. It should
load the exception reason to the FUNCTION_RETURN_REG. The saved value
should either be in the temp. area (pointed to by href , href should
*NOT* be freed) or on the stack (the value should be popped).
The size of the value to save is OS_S32. The default version
saves the exception reason to a temp. memory area.
}
procedure g_exception_reason_load(list : TAsmList; const href : treference);virtual;
procedure g_maybe_testself(list : TAsmList;reg:tregister);
procedure g_maybe_testvmt(list : TAsmList;reg:tregister;objdef:tobjectdef);
{# This should emit the opcode to copy len bytes from the source
to destination.
It must be overriden for each new target processor.
@param(source Source reference of copy)
@param(dest Destination reference of copy)
}
procedure g_concatcopy(list : TAsmList;const source,dest : treference;len : aint);virtual; abstract;
{# This should emit the opcode to copy len bytes from the an unaligned source
to destination.
It must be overriden for each new target processor.
@param(source Source reference of copy)
@param(dest Destination reference of copy)
}
procedure g_concatcopy_unaligned(list : TAsmList;const source,dest : treference;len : aint);virtual;
{# This should emit the opcode to a shortrstring from the source
to destination.
@param(source Source reference of copy)
@param(dest Destination reference of copy)
}
procedure g_copyshortstring(list : TAsmList;const source,dest : treference;len:byte);
procedure g_copyvariant(list : TAsmList;const source,dest : treference);
procedure g_incrrefcount(list : TAsmList;t: tdef; const ref: treference);
procedure g_decrrefcount(list : TAsmList;t: tdef; const ref: treference);
procedure g_initialize(list : TAsmList;t : tdef;const ref : treference);
procedure g_finalize(list : TAsmList;t : tdef;const ref : treference);
{# Generates range checking code. It is to note
that this routine does not need to be overriden,
as it takes care of everything.
@param(p Node which contains the value to check)
@param(todef Type definition of node to range check)
}
procedure g_rangecheck(list: TAsmList; const l:tlocation; fromdef,todef: tdef); virtual;
{# Generates overflow checking code for a node }
procedure g_overflowcheck(list: TAsmList; const Loc:tlocation; def:tdef); virtual;abstract;
procedure g_overflowCheck_loc(List:TAsmList;const Loc:TLocation;def:TDef;ovloc : tlocation);virtual;
procedure g_copyvaluepara_openarray(list : TAsmList;const ref:treference;const lenloc:tlocation;elesize:aint;destreg:tregister);virtual;
procedure g_releasevaluepara_openarray(list : TAsmList;const l:tlocation);virtual;
{# Emits instructions when compilation is done in profile
mode (this is set as a command line option). The default
behavior does nothing, should be overriden as required.
}
procedure g_profilecode(list : TAsmList);virtual;
{# Emits instruction for allocating @var(size) bytes at the stackpointer
@param(size Number of bytes to allocate)
}
procedure g_stackpointer_alloc(list : TAsmList;size : longint);virtual; abstract;
{# Emits instruction for allocating the locals in entry
code of a routine. This is one of the first
routine called in @var(genentrycode).
@param(localsize Number of bytes to allocate as locals)
}
procedure g_proc_entry(list : TAsmList;localsize : longint;nostackframe:boolean);virtual; abstract;
{# Emits instructions for returning from a subroutine.
Should also restore the framepointer and stack.
@param(parasize Number of bytes of parameters to deallocate from stack)
}
procedure g_proc_exit(list : TAsmList;parasize:longint;nostackframe:boolean);virtual;abstract;
{# This routine is called when generating the code for the entry point
of a routine. It should save all registers which are not used in this
routine, and which should be declared as saved in the std_saved_registers
set.
This routine is mainly used when linking to code which is generated
by ABI-compliant compilers (like GCC), to make sure that the reserved
registers of that ABI are not clobbered.
@param(usedinproc Registers which are used in the code of this routine)
}
procedure g_save_standard_registers(list:TAsmList);virtual;
{# This routine is called when generating the code for the exit point
of a routine. It should restore all registers which were previously
saved in @var(g_save_standard_registers).
@param(usedinproc Registers which are used in the code of this routine)
}
procedure g_restore_standard_registers(list:TAsmList);virtual;
procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);virtual;abstract;
procedure g_adjust_self_value(list:TAsmList;procdef: tprocdef;ioffset: aint);virtual;
function g_indirect_sym_load(list:TAsmList;const symname: string): tregister;virtual;
protected
procedure get_subsetref_load_info(const sref: tsubsetreference; out loadsize: tcgsize; out extra_load: boolean);
procedure a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister); virtual;
procedure a_load_subsetref_regs_index(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister); virtual;
procedure a_load_regconst_subsetref_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sref: tsubsetreference; slopt: tsubsetloadopt); virtual;
procedure a_load_regconst_subsetreg_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); virtual;
end;
{$ifndef cpu64bit}
{# @abstract(Abstract code generator for 64 Bit operations)
This class implements an abstract code generator class
for 64 Bit operations.
}
tcg64 = class
procedure a_load64_const_ref(list : TAsmList;value : int64;const ref : treference);virtual;abstract;
procedure a_load64_reg_ref(list : TAsmList;reg : tregister64;const ref : treference);virtual;abstract;
procedure a_load64_ref_reg(list : TAsmList;const ref : treference;reg : tregister64);virtual;abstract;
procedure a_load64_reg_reg(list : TAsmList;regsrc,regdst : tregister64);virtual;abstract;
procedure a_load64_const_reg(list : TAsmList;value : int64;reg : tregister64);virtual;abstract;
procedure a_load64_loc_reg(list : TAsmList;const l : tlocation;reg : tregister64);virtual;abstract;
procedure a_load64_loc_ref(list : TAsmList;const l : tlocation;const ref : treference);virtual;abstract;
procedure a_load64_const_loc(list : TAsmList;value : int64;const l : tlocation);virtual;abstract;
procedure a_load64_reg_loc(list : TAsmList;reg : tregister64;const l : tlocation);virtual;abstract;
procedure a_load64_subsetref_reg(list : TAsmList; const sref: tsubsetreference; destreg: tregister64);virtual;abstract;
procedure a_load64_reg_subsetref(list : TAsmList; fromreg: tregister64; const sref: tsubsetreference);virtual;abstract;
procedure a_load64_const_subsetref(list: TAsmlist; a: int64; const sref: tsubsetreference);virtual;abstract;
procedure a_load64_ref_subsetref(list : TAsmList; const fromref: treference; const sref: tsubsetreference);virtual;abstract;
procedure a_load64_subsetref_subsetref(list: TAsmlist; const fromsref, tosref: tsubsetreference); virtual;abstract;
procedure a_load64_subsetref_ref(list : TAsmList; const sref: tsubsetreference; const destref: treference); virtual;abstract;
procedure a_load64_loc_subsetref(list : TAsmList; const l: tlocation; const sref : tsubsetreference);
procedure a_load64_subsetref_loc(list: TAsmlist; const sref: tsubsetreference; const l: tlocation);
procedure a_load64high_reg_ref(list : TAsmList;reg : tregister;const ref : treference);virtual;abstract;
procedure a_load64low_reg_ref(list : TAsmList;reg : tregister;const ref : treference);virtual;abstract;
procedure a_load64high_ref_reg(list : TAsmList;const ref : treference;reg : tregister);virtual;abstract;
procedure a_load64low_ref_reg(list : TAsmList;const ref : treference;reg : tregister);virtual;abstract;
procedure a_load64high_loc_reg(list : TAsmList;const l : tlocation;reg : tregister);virtual;abstract;
procedure a_load64low_loc_reg(list : TAsmList;const l : tlocation;reg : tregister);virtual;abstract;
procedure a_op64_ref_reg(list : TAsmList;op:TOpCG;size : tcgsize;const ref : treference;reg : tregister64);virtual;abstract;
procedure a_op64_reg_reg(list : TAsmList;op:TOpCG;size : tcgsize;regsrc,regdst : tregister64);virtual;abstract;
procedure a_op64_reg_ref(list : TAsmList;op:TOpCG;size : tcgsize;regsrc : tregister64;const ref : treference);virtual;abstract;
procedure a_op64_const_reg(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;regdst : tregister64);virtual;abstract;
procedure a_op64_const_ref(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;const ref : treference);virtual;abstract;
procedure a_op64_const_loc(list : TAsmList;op:TOpCG;size : tcgsize;value : int64;const l: tlocation);virtual;abstract;
procedure a_op64_reg_loc(list : TAsmList;op:TOpCG;size : tcgsize;reg : tregister64;const l : tlocation);virtual;abstract;
procedure a_op64_loc_reg(list : TAsmList;op:TOpCG;size : tcgsize;const l : tlocation;reg64 : tregister64);virtual;abstract;
procedure a_op64_const_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;value : int64;regsrc,regdst : tregister64);virtual;
procedure a_op64_reg_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64);virtual;
procedure a_op64_const_reg_reg_checkoverflow(list: TAsmList;op:TOpCG;size : tcgsize;value : int64;regsrc,regdst : tregister64;setflags : boolean;var ovloc : tlocation);virtual;
procedure a_op64_reg_reg_reg_checkoverflow(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64;setflags : boolean;var ovloc : tlocation);virtual;
procedure a_op64_const_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; a : int64; const sref: tsubsetreference);
procedure a_op64_reg_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; reg: tregister64; const sref: tsubsetreference);
procedure a_op64_ref_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; const ref: treference; const sref: tsubsetreference);
procedure a_op64_subsetref_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; const ssref,dsref: tsubsetreference);
procedure a_param64_reg(list : TAsmList;reg64 : tregister64;const loc : TCGPara);virtual;abstract;
procedure a_param64_const(list : TAsmList;value : int64;const loc : TCGPara);virtual;abstract;
procedure a_param64_ref(list : TAsmList;const r : treference;const loc : TCGPara);virtual;abstract;
procedure a_param64_loc(list : TAsmList;const l : tlocation;const loc : TCGPara);virtual;abstract;
{
This routine tries to optimize the const_reg opcode, and should be
called at the start of a_op64_const_reg. It returns the actual opcode
to emit, and the constant value to emit. If this routine returns
TRUE, @var(no) instruction should be emitted (.eg : imul reg by 1 )
@param(op The opcode to emit, returns the opcode which must be emitted)
@param(a The constant which should be emitted, returns the constant which must
be emitted)
@param(reg The register to emit the opcode with, returns the register with
which the opcode will be emitted)
}
function optimize64_op_const_reg(list: TAsmList; var op: topcg; var a : int64; var reg: tregister64): boolean;virtual;abstract;
{ override to catch 64bit rangechecks }
procedure g_rangecheck64(list: TAsmList; const l:tlocation; fromdef,todef: tdef);virtual;abstract;
end;
{$endif cpu64bit}
var
{# Main code generator class }
cg : tcg;
{$ifndef cpu64bit}
{# Code generator class for all operations working with 64-Bit operands }
cg64 : tcg64;
{$endif cpu64bit}
implementation
uses
globals,options,systems,
verbose,defutil,paramgr,symsym,
tgobj,cutils,procinfo,
ncgrtti;
{*****************************************************************************
basic functionallity
******************************************************************************}
constructor tcg.create;
begin
end;
{*****************************************************************************
register allocation
******************************************************************************}
procedure tcg.init_register_allocators;
begin
fillchar(rg,sizeof(rg),0);
add_reg_instruction_hook:=@add_reg_instruction;
end;
procedure tcg.done_register_allocators;
begin
{ Safety }
fillchar(rg,sizeof(rg),0);
add_reg_instruction_hook:=nil;
end;
{$ifdef flowgraph}
procedure Tcg.init_flowgraph;
begin
aktflownode:=0;
end;
procedure Tcg.done_flowgraph;
begin
end;
{$endif}
function tcg.getintregister(list:TAsmList;size:Tcgsize):Tregister;
begin
if not assigned(rg[R_INTREGISTER]) then
internalerror(200312122);
result:=rg[R_INTREGISTER].getregister(list,cgsize2subreg(size));
end;
function tcg.getfpuregister(list:TAsmList;size:Tcgsize):Tregister;
begin
if not assigned(rg[R_FPUREGISTER]) then
internalerror(200312123);
result:=rg[R_FPUREGISTER].getregister(list,cgsize2subreg(size));
end;
function tcg.getmmregister(list:TAsmList;size:Tcgsize):Tregister;
begin
if not assigned(rg[R_MMREGISTER]) then
internalerror(2003121214);
result:=rg[R_MMREGISTER].getregister(list,cgsize2subreg(size));
end;
function tcg.getaddressregister(list:TAsmList):Tregister;
begin
if assigned(rg[R_ADDRESSREGISTER]) then
result:=rg[R_ADDRESSREGISTER].getregister(list,R_SUBWHOLE)
else
begin
if not assigned(rg[R_INTREGISTER]) then
internalerror(200312121);
result:=rg[R_INTREGISTER].getregister(list,R_SUBWHOLE);
end;
end;
function Tcg.makeregsize(list:TAsmList;reg:Tregister;size:Tcgsize):Tregister;
var
subreg:Tsubregister;
begin
subreg:=cgsize2subreg(size);
result:=reg;
setsubreg(result,subreg);
{ notify RA }
if result<>reg then
list.concat(tai_regalloc.resize(result));
end;
procedure tcg.getcpuregister(list:TAsmList;r:Tregister);
begin
if not assigned(rg[getregtype(r)]) then
internalerror(200312125);
rg[getregtype(r)].getcpuregister(list,r);
end;
procedure tcg.ungetcpuregister(list:TAsmList;r:Tregister);
begin
if not assigned(rg[getregtype(r)]) then
internalerror(200312126);
rg[getregtype(r)].ungetcpuregister(list,r);
end;
procedure tcg.alloccpuregisters(list:TAsmList;rt:Tregistertype;const r:Tcpuregisterset);
begin
if assigned(rg[rt]) then
rg[rt].alloccpuregisters(list,r)
else
internalerror(200310092);
end;
procedure tcg.allocallcpuregisters(list:TAsmList);
begin
alloccpuregisters(list,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
{$ifndef i386}
alloccpuregisters(list,R_FPUREGISTER,paramanager.get_volatile_registers_fpu(pocall_default));
{$ifdef cpumm}
alloccpuregisters(list,R_MMREGISTER,paramanager.get_volatile_registers_mm(pocall_default));
{$endif cpumm}
{$endif i386}
end;
procedure tcg.dealloccpuregisters(list:TAsmList;rt:Tregistertype;const r:Tcpuregisterset);
begin
if assigned(rg[rt]) then
rg[rt].dealloccpuregisters(list,r)
else
internalerror(200310093);
end;
procedure tcg.deallocallcpuregisters(list:TAsmList);
begin
dealloccpuregisters(list,R_INTREGISTER,paramanager.get_volatile_registers_int(pocall_default));
{$ifndef i386}
dealloccpuregisters(list,R_FPUREGISTER,paramanager.get_volatile_registers_fpu(pocall_default));
{$ifdef cpumm}
dealloccpuregisters(list,R_MMREGISTER,paramanager.get_volatile_registers_mm(pocall_default));
{$endif cpumm}
{$endif i386}
end;
function tcg.uses_registers(rt:Tregistertype):boolean;
begin
if assigned(rg[rt]) then
result:=rg[rt].uses_registers
else
result:=false;
end;
procedure tcg.add_reg_instruction(instr:Tai;r:tregister);
var
rt : tregistertype;
begin
rt:=getregtype(r);
{ Only add it when a register allocator is configured.
No IE can be generated, because the VMT is written
without a valid rg[] }
if assigned(rg[rt]) then
rg[rt].add_reg_instruction(instr,r);
end;
procedure tcg.add_move_instruction(instr:Taicpu);
var
rt : tregistertype;
begin
rt:=getregtype(instr.oper[O_MOV_SOURCE]^.reg);
if assigned(rg[rt]) then
rg[rt].add_move_instruction(instr)
else
internalerror(200310095);
end;
procedure tcg.set_regalloc_extend_backwards(b: boolean);
var
rt : tregistertype;
begin
for rt:=low(rg) to high(rg) do
begin
if assigned(rg[rt]) then
rg[rt].extend_live_range_backwards := b;;
end;
end;
procedure tcg.do_register_allocation(list:TAsmList;headertai:tai);
var
rt : tregistertype;
begin
for rt:=R_FPUREGISTER to R_SPECIALREGISTER do
begin
if assigned(rg[rt]) then
rg[rt].do_register_allocation(list,headertai);
end;
{ running the other register allocator passes could require addition int/addr. registers
when spilling so run int/addr register allocation at the end }
if assigned(rg[R_INTREGISTER]) then
rg[R_INTREGISTER].do_register_allocation(list,headertai);
if assigned(rg[R_ADDRESSREGISTER]) then
rg[R_ADDRESSREGISTER].do_register_allocation(list,headertai);
end;
procedure tcg.translate_register(var reg : tregister);
begin
rg[getregtype(reg)].translate_register(reg);
end;
procedure tcg.a_reg_alloc(list : TAsmList;r : tregister);
begin
list.concat(tai_regalloc.alloc(r,nil));
end;
procedure tcg.a_reg_dealloc(list : TAsmList;r : tregister);
begin
list.concat(tai_regalloc.dealloc(r,nil));
end;
procedure tcg.a_reg_sync(list : TAsmList;r : tregister);
var
instr : tai;
begin
instr:=tai_regalloc.sync(r);
list.concat(instr);
add_reg_instruction(instr,r);
end;
procedure tcg.a_label(list : TAsmList;l : tasmlabel);
begin
list.concat(tai_label.create(l));
end;
{*****************************************************************************
for better code generation these methods should be overridden
******************************************************************************}
procedure tcg.a_param_reg(list : TAsmList;size : tcgsize;r : tregister;const cgpara : TCGPara);
var
ref : treference;
begin
cgpara.check_simple_location;
case cgpara.location^.loc of
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_reg(list,size,cgpara.location^.size,r,cgpara.location^.register);
LOC_REFERENCE,LOC_CREFERENCE:
begin
reference_reset_base(ref,cgpara.location^.reference.index,cgpara.location^.reference.offset);
a_load_reg_ref(list,size,cgpara.location^.size,r,ref);
end
else
internalerror(2002071004);
end;
end;
procedure tcg.a_param_const(list : TAsmList;size : tcgsize;a : aint;const cgpara : TCGPara);
var
ref : treference;
begin
cgpara.check_simple_location;
case cgpara.location^.loc of
LOC_REGISTER,LOC_CREGISTER:
a_load_const_reg(list,cgpara.location^.size,a,cgpara.location^.register);
LOC_REFERENCE,LOC_CREFERENCE:
begin
reference_reset_base(ref,cgpara.location^.reference.index,cgpara.location^.reference.offset);
a_load_const_ref(list,cgpara.location^.size,a,ref);
end
else
internalerror(2002071004);
end;
end;
procedure tcg.a_param_ref(list : TAsmList;size : tcgsize;const r : treference;const cgpara : TCGPara);
var
ref : treference;
begin
cgpara.check_simple_location;
case cgpara.location^.loc of
LOC_REGISTER,LOC_CREGISTER:
a_load_ref_reg(list,size,cgpara.location^.size,r,cgpara.location^.register);
LOC_REFERENCE,LOC_CREFERENCE:
begin
reference_reset(ref);
ref.base:=cgpara.location^.reference.index;
ref.offset:=cgpara.location^.reference.offset;
if (size <> OS_NO) and
(tcgsize2size[size] < sizeof(aint)) then
begin
if (cgpara.size = OS_NO) or
assigned(cgpara.location^.next) then
internalerror(2006052401);
a_load_ref_ref(list,size,cgpara.size,r,ref);
end
else
{ use concatcopy, because the parameter can be larger than }
{ what the OS_* constants can handle }
g_concatcopy(list,r,ref,cgpara.intsize);
end
else
internalerror(2002071004);
end;
end;
procedure tcg.a_param_loc(list : TAsmList;const l:tlocation;const cgpara : TCGPara);
begin
case l.loc of
LOC_REGISTER,
LOC_CREGISTER :
a_param_reg(list,l.size,l.register,cgpara);
LOC_CONSTANT :
a_param_const(list,l.size,l.value,cgpara);
LOC_CREFERENCE,
LOC_REFERENCE :
a_param_ref(list,l.size,l.reference,cgpara);
else
internalerror(2002032211);
end;
end;
procedure tcg.a_paramaddr_ref(list : TAsmList;const r : treference;const cgpara : TCGPara);
var
hr : tregister;
begin
cgpara.check_simple_location;
if cgpara.location^.loc in [LOC_CREGISTER,LOC_REGISTER] then
a_loadaddr_ref_reg(list,r,cgpara.location^.register)
else
begin
hr:=getaddressregister(list);
a_loadaddr_ref_reg(list,r,hr);
a_param_reg(list,OS_ADDR,hr,cgpara);
end;
end;
{****************************************************************************
some generic implementations
****************************************************************************}
{$ifopt r+}
{$define rangeon}
{$r-}
{$endif}
{$ifopt q+}
{$define overflowon}
{$q-}
{$endif}
procedure tcg.a_load_subsetreg_reg(list : TAsmList; subsetsize, tosize: tcgsize; const sreg: tsubsetregister; destreg: tregister);
var
bitmask: aword;
tmpreg: tregister;
stopbit: byte;
begin
tmpreg:=getintregister(list,sreg.subsetregsize);
if (subsetsize in [OS_S8..OS_S128]) then
begin
{ sign extend in case the value has a bitsize mod 8 <> 0 }
{ both instructions will be optimized away if not }
a_op_const_reg_reg(list,OP_SHL,sreg.subsetregsize,(tcgsize2size[sreg.subsetregsize]*8)-sreg.startbit-sreg.bitlen,sreg.subsetreg,tmpreg);
a_op_const_reg(list,OP_SAR,sreg.subsetregsize,(tcgsize2size[sreg.subsetregsize]*8)-sreg.bitlen,tmpreg);
end
else
begin
a_op_const_reg_reg(list,OP_SHR,sreg.subsetregsize,sreg.startbit,sreg.subsetreg,tmpreg);
stopbit := sreg.startbit + sreg.bitlen;
// on x86(64), 1 shl 32(64) = 1 instead of 0
// use aword to prevent overflow with 1 shl 31
if (stopbit - sreg.startbit <> AIntBits) then
bitmask := (aword(1) shl (stopbit - sreg.startbit)) - 1
else
bitmask := high(aword);
a_op_const_reg(list,OP_AND,sreg.subsetregsize,aint(bitmask),tmpreg);
end;
tmpreg := makeregsize(list,tmpreg,subsetsize);
a_load_reg_reg(list,tcgsize2unsigned[subsetsize],subsetsize,tmpreg,tmpreg);
a_load_reg_reg(list,subsetsize,tosize,tmpreg,destreg);
end;
procedure tcg.a_load_reg_subsetreg(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister);
begin
a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,SL_REG);
end;
procedure tcg.a_load_regconst_subsetreg_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
var
bitmask: aword;
tmpreg: tregister;
stopbit: byte;
begin
stopbit := sreg.startbit + sreg.bitlen;
// on x86(64), 1 shl 32(64) = 1 instead of 0
if (stopbit <> AIntBits) then
bitmask := not(((aword(1) shl stopbit)-1) xor ((aword(1) shl sreg.startbit)-1))
else
bitmask := not(high(aword) xor ((aword(1) shl sreg.startbit)-1));
if not(slopt in [SL_SETZERO,SL_SETMAX]) then
begin
tmpreg:=getintregister(list,sreg.subsetregsize);
a_load_reg_reg(list,fromsize,sreg.subsetregsize,fromreg,tmpreg);
a_op_const_reg(list,OP_SHL,sreg.subsetregsize,sreg.startbit,tmpreg);
if (slopt <> SL_REGNOSRCMASK) then
a_op_const_reg(list,OP_AND,sreg.subsetregsize,aint(not(bitmask)),tmpreg);
end;
if (slopt <> SL_SETMAX) then
a_op_const_reg(list,OP_AND,sreg.subsetregsize,aint(bitmask),sreg.subsetreg);
case slopt of
SL_SETZERO : ;
SL_SETMAX :
if (sreg.bitlen <> AIntBits) then
a_op_const_reg(list,OP_OR,sreg.subsetregsize,
aint(((aword(1) shl sreg.bitlen)-1) shl sreg.startbit),
sreg.subsetreg)
else
a_load_const_reg(list,sreg.subsetregsize,-1,sreg.subsetreg);
else
a_op_reg_reg(list,OP_OR,sreg.subsetregsize,tmpreg,sreg.subsetreg);
end;
end;
procedure tcg.a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsreg, tosreg: tsubsetregister);
var
tmpreg: tregister;
bitmask: aword;
stopbit: byte;
begin
if (fromsreg.bitlen >= tosreg.bitlen) then
begin
tmpreg := getintregister(list,tosreg.subsetregsize);
a_load_reg_reg(list,fromsreg.subsetregsize,tosreg.subsetregsize,fromsreg.subsetreg,tmpreg);
if (fromsreg.startbit <= tosreg.startbit) then
a_op_const_reg(list,OP_SHL,tosreg.subsetregsize,tosreg.startbit-fromsreg.startbit,tmpreg)
else
a_op_const_reg(list,OP_SHR,tosreg.subsetregsize,fromsreg.startbit-tosreg.startbit,tmpreg);
stopbit := tosreg.startbit + tosreg.bitlen;
// on x86(64), 1 shl 32(64) = 1 instead of 0
if (stopbit <> AIntBits) then
bitmask := not(((aword(1) shl stopbit)-1) xor ((aword(1) shl tosreg.startbit)-1))
else
bitmask := (aword(1) shl tosreg.startbit) - 1;
a_op_const_reg(list,OP_AND,tosreg.subsetregsize,aint(bitmask),tosreg.subsetreg);
a_op_const_reg(list,OP_AND,tosreg.subsetregsize,aint(not(bitmask)),tmpreg);
a_op_reg_reg(list,OP_OR,tosreg.subsetregsize,tmpreg,tosreg.subsetreg);
end
else
begin
tmpreg := getintregister(list,tosubsetsize);
a_load_subsetreg_reg(list,fromsubsetsize,tosubsetsize,fromsreg,tmpreg);
a_load_reg_subsetreg(list,tosubsetsize,tosubsetsize,tmpreg,tosreg);
end;
end;
procedure tcg.a_load_subsetreg_ref(list : TAsmList; subsetsize, tosize: tcgsize; const sreg: tsubsetregister; const destref: treference);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,tosize);
a_load_subsetreg_reg(list,subsetsize,tosize,sreg,tmpreg);
a_load_reg_ref(list,tosize,tosize,tmpreg,destref);
end;
procedure tcg.a_load_ref_subsetreg(list : TAsmList; fromsize, subsetsize: tcgsize; const fromref: treference; const sreg: tsubsetregister);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,subsetsize);
a_load_ref_reg(list,fromsize,subsetsize,fromref,tmpreg);
a_load_reg_subsetreg(list,subsetsize,subsetsize,tmpreg,sreg);
end;
procedure tcg.a_load_const_subsetreg(list: TAsmlist; subsetsize: tcgsize; a: aint; const sreg: tsubsetregister);
var
bitmask: aword;
stopbit: byte;
begin
stopbit := sreg.startbit + sreg.bitlen;
// on x86(64), 1 shl 32(64) = 1 instead of 0
if (stopbit <> AIntBits) then
bitmask := not(((aword(1) shl stopbit)-1) xor ((aword(1) shl sreg.startbit)-1))
else
bitmask := (aword(1) shl sreg.startbit) - 1;
if (((aword(a) shl sreg.startbit) and not bitmask) <> not bitmask) then
a_op_const_reg(list,OP_AND,sreg.subsetregsize,aint(bitmask),sreg.subsetreg);
a_op_const_reg(list,OP_OR,sreg.subsetregsize,aint((aword(a) shl sreg.startbit) and not(bitmask)),sreg.subsetreg);
end;
procedure tcg.a_load_loc_subsetref(list : TAsmList;subsetsize: tcgsize; const loc: tlocation; const sref : tsubsetreference);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_ref_subsetref(list,loc.size,subsetsize,loc.reference,sref);
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_subsetref(list,loc.size,subsetsize,loc.register,sref);
LOC_CONSTANT:
a_load_const_subsetref(list,subsetsize,loc.value,sref);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetreg_subsetref(list,loc.size,subsetsize,loc.sreg,sref);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetref_subsetref(list,loc.size,subsetsize,loc.sref,sref);
else
internalerror(200608053);
end;
end;
(*
Subsetrefs are used for (bit)packed arrays and (bit)packed records stored
in memory. They are like a regular reference, but contain an extra bit
offset (either constant -startbit- or variable -bitindexreg-, always OS_INT)
and a bit length (always constant).
Bit packed values are stored differently in memory depending on whether we
are on a big or a little endian system (compatible with at least GPC). The
size of the basic working unit is always the smallest power-of-2 byte size
which can contain the bit value (so 1..8 bits -> 1 byte, 9..16 bits -> 2
bytes, 17..32 bits -> 4 bytes etc).
On a big endian, 5-bit: values are stored like this:
11111222 22333334 44445555 56666677 77788888
The leftmost bit of each 5-bit value corresponds to the most significant
bit.
On little endian, it goes like this:
22211111 43333322 55554444 77666665 88888777
In this case, per byte the left-most bit is more significant than those on
the right, but the bits in the next byte are all more significant than
those in the previous byte (e.g., the 222 in the first byte are the low
three bits of that value, while the 22 in the second byte are the upper
two bits.
Big endian, 9 bit values:
11111111 12222222 22333333 33344444 ...
Little endian, 9 bit values:
11111111 22222221 33333322 44444333 ...
This is memory representation and the 16 bit values are byteswapped.
Similarly as in the previous case, the 2222222 string contains the lower
bits of value 2 and the 22 string contains the upper bits. Once loaded into
registers (two 16 bit registers in the current implementation, although a
single 32 bit register would be possible too, in particular if 32 bit
alignment can be guaranteed), this becomes:
22222221 11111111 44444333 33333322 ...
(l)ow u l l u l u
The startbit/bitindex in a subsetreference always refers to
a) on big endian: the most significant bit of the value
(bits counted from left to right, both memory an registers)
b) on little endian: the least significant bit when the value
is loaded in a register (bit counted from right to left)
Although a) results in more complex code for big endian systems, it's
needed for compatibility both with GPC and with e.g. bitpacked arrays in
Apple's universal interfaces which depend on these layout differences).
Note: when changing the loadsize calculated in get_subsetref_load_info,
make sure the appropriate alignment is guaranteed, at least in case of
{$defined cpurequiresproperalignment}.
*)
procedure tcg.get_subsetref_load_info(const sref: tsubsetreference; out loadsize: tcgsize; out extra_load: boolean);
var
intloadsize: aint;
begin
intloadsize := packedbitsloadsize(sref.bitlen);
{$if defined(cpurequiresproperalignment) and not defined(arm) and not(defined(sparc))}
{ may need to be split into several smaller loads/stores }
if intloadsize <> sref.ref.alignment then
internalerror(2006082011);
{$endif cpurequiresproperalignment}
if (intloadsize = 0) then
internalerror(2006081310);
if (intloadsize > sizeof(aint)) then
intloadsize := sizeof(aint);
loadsize := int_cgsize(intloadsize);
if (loadsize = OS_NO) then
internalerror(2006081311);
if (sref.bitlen > sizeof(aint)*8) then
internalerror(2006081312);
extra_load :=
(sref.bitlen <> 1) and
((sref.bitindexreg <> NR_NO) or
(byte(sref.startbit+sref.bitlen) > byte(intloadsize*8)));
end;
procedure tcg.a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister);
var
restbits: byte;
begin
if (target_info.endian = endian_big) then
begin
{ valuereg contains the upper bits, extra_value_reg the lower }
restbits := (sref.bitlen - (loadbitsize - sref.startbit));
if (subsetsize in [OS_S8..OS_S128]) then
begin
{ sign extend }
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-loadbitsize+sref.startbit,valuereg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,valuereg);
end
else
begin
a_op_const_reg(list,OP_SHL,OS_INT,restbits,valuereg);
{ mask other bits }
if (sref.bitlen <> AIntBits) then
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),valuereg);
end;
a_op_const_reg(list,OP_SHR,OS_INT,loadbitsize-restbits,extra_value_reg)
end
else
begin
{ valuereg contains the lower bits, extra_value_reg the upper }
a_op_const_reg(list,OP_SHR,OS_INT,sref.startbit,valuereg);
if (subsetsize in [OS_S8..OS_S128]) then
begin
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-sref.bitlen+loadbitsize-sref.startbit,extra_value_reg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,extra_value_reg);
end
else
begin
a_op_const_reg(list,OP_SHL,OS_INT,loadbitsize-sref.startbit,extra_value_reg);
{ mask other bits }
if (sref.bitlen <> AIntBits) then
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),extra_value_reg);
end;
end;
{ merge }
a_op_reg_reg(list,OP_OR,OS_INT,extra_value_reg,valuereg);
end;
procedure tcg.a_load_subsetref_regs_index(list: TAsmList; subsetsize: tcgsize; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,OS_INT);
if (target_info.endian = endian_big) then
begin
{ since this is a dynamic index, it's possible that the value }
{ is entirely in valuereg. }
{ get the data in valuereg in the right place }
a_op_reg_reg(list,OP_SHL,OS_INT,sref.bitindexreg,valuereg);
if (subsetsize in [OS_S8..OS_S128]) then
begin
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-loadbitsize,valuereg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,valuereg)
end
else
begin
a_op_const_reg(list,OP_SHR,OS_INT,loadbitsize-sref.bitlen,valuereg);
if (loadbitsize <> AIntBits) then
{ mask left over bits }
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),valuereg);
end;
tmpreg := getintregister(list,OS_INT);
{ the bits in extra_value_reg (if any) start at the most significant bit => }
{ extra_value_reg must be shr by (loadbitsize-sref.bitlen)+(loadsize-sref.bitindex) }
{ => = -(sref.bitindex+(sref.bitlen-2*loadbitsize)) }
a_op_const_reg_reg(list,OP_ADD,OS_INT,sref.bitlen-2*loadbitsize,sref.bitindexreg,tmpreg);
a_op_reg_reg(list,OP_NEG,OS_INT,tmpreg,tmpreg);
a_op_reg_reg(list,OP_SHR,OS_INT,tmpreg,extra_value_reg);
{ if there are no bits in extra_value_reg, then sref.bitindex was }
{ < loadsize-sref.bitlen, and therefore tmpreg will now be >= loadsize }
{ => extra_value_reg is now 0 }
{$ifdef sparc}
{ except on sparc, where "shr X" = "shr (X and (bitsize-1))" }
if (loadbitsize = AIntBits) then
begin
{ if (tmpreg >= cpu_bit_size) then tmpreg := 1 else tmpreg := 0 }
a_op_const_reg(list,OP_SHR,OS_INT,{$ifdef cpu64bit}6{$else}5{$endif},tmpreg);
{ if (tmpreg = cpu_bit_size) then tmpreg := 0 else tmpreg := -1 }
a_op_const_reg(list,OP_SUB,OS_INT,1,tmpreg);
{ if (tmpreg = cpu_bit_size) then extra_value_reg := 0 }
a_op_reg_reg(list,OP_AND,OS_INT,tmpreg,extra_value_reg);
end;
{$endif sparc}
{ merge }
a_op_reg_reg(list,OP_OR,OS_INT,extra_value_reg,valuereg);
{ no need to mask, necessary masking happened earlier on }
end
else
begin
a_op_reg_reg(list,OP_SHR,OS_INT,sref.bitindexreg,valuereg);
{ Y-x = -(Y-x) }
a_op_const_reg_reg(list,OP_SUB,OS_INT,loadbitsize,sref.bitindexreg,tmpreg);
a_op_reg_reg(list,OP_NEG,OS_INT,tmpreg,tmpreg);
{ tmpreg is in the range 1..<cpu_bitsize> -> will zero extra_value_reg }
{ if all bits are in valuereg }
a_op_reg_reg(list,OP_SHL,OS_INT,tmpreg,extra_value_reg);
{$ifdef x86}
{ on i386 "x shl 32 = x shl 0", on x86/64 "x shl 64 = x shl 0". Fix so it's 0. }
if (loadbitsize = AIntBits) then
begin
{ if (tmpreg >= cpu_bit_size) then tmpreg := 1 else tmpreg := 0 }
a_op_const_reg(list,OP_SHR,OS_INT,{$ifdef cpu64bit}6{$else}5{$endif},tmpreg);
{ if (tmpreg = cpu_bit_size) then tmpreg := 0 else tmpreg := -1 }
a_op_const_reg(list,OP_SUB,OS_INT,1,tmpreg);
{ if (tmpreg = cpu_bit_size) then extra_value_reg := 0 }
a_op_reg_reg(list,OP_AND,OS_INT,tmpreg,extra_value_reg);
end;
{$endif x86}
{ merge }
a_op_reg_reg(list,OP_OR,OS_INT,extra_value_reg,valuereg);
{ sign extend or mask other bits }
if (subsetsize in [OS_S8..OS_S128]) then
begin
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-sref.bitlen,valuereg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,valuereg);
end
else
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),valuereg);
end;
end;
procedure tcg.a_load_subsetref_reg(list : TAsmList; subsetsize, tosize: tcgsize; const sref: tsubsetreference; destreg: tregister);
var
tmpref: treference;
valuereg,extra_value_reg: tregister;
tosreg: tsubsetregister;
loadsize: tcgsize;
loadbitsize: byte;
extra_load: boolean;
begin
get_subsetref_load_info(sref,loadsize,extra_load);
loadbitsize := tcgsize2size[loadsize]*8;
{ load the (first part) of the bit sequence }
valuereg := cg.getintregister(list,OS_INT);
a_load_ref_reg(list,loadsize,OS_INT,sref.ref,valuereg);
if not extra_load then
begin
{ everything is guaranteed to be in a single register of loadsize }
if (sref.bitindexreg = NR_NO) then
begin
{ use subsetreg routine, it may have been overridden with an optimized version }
tosreg.subsetreg := valuereg;
tosreg.subsetregsize := OS_INT;
{ subsetregs always count bits from right to left }
if (target_info.endian = endian_big) then
tosreg.startbit := loadbitsize - (sref.startbit+sref.bitlen)
else
tosreg.startbit := sref.startbit;
tosreg.bitlen := sref.bitlen;
a_load_subsetreg_reg(list,subsetsize,tosize,tosreg,destreg);
exit;
end
else
begin
if (sref.startbit <> 0) then
internalerror(2006081510);
if (target_info.endian = endian_big) then
begin
a_op_reg_reg(list,OP_SHL,OS_INT,sref.bitindexreg,valuereg);
if (subsetsize in [OS_S8..OS_S128]) then
begin
{ sign extend to entire register }
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-loadbitsize,valuereg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,valuereg);
end
else
a_op_const_reg(list,OP_SHR,OS_INT,loadbitsize-sref.bitlen,valuereg);
end
else
begin
a_op_reg_reg(list,OP_SHR,OS_INT,sref.bitindexreg,valuereg);
if (subsetsize in [OS_S8..OS_S128]) then
begin
a_op_const_reg(list,OP_SHL,OS_INT,AIntBits-sref.bitlen,valuereg);
a_op_const_reg(list,OP_SAR,OS_INT,AIntBits-sref.bitlen,valuereg);
end
end;
{ mask other bits/sign extend }
if not(subsetsize in [OS_S8..OS_S128]) then
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),valuereg);
end
end
else
begin
{ load next value as well }
extra_value_reg := getintregister(list,OS_INT);
tmpref := sref.ref;
inc(tmpref.offset,loadbitsize div 8);
a_load_ref_reg(list,loadsize,OS_INT,tmpref,extra_value_reg);
if (sref.bitindexreg = NR_NO) then
{ can be overridden to optimize }
a_load_subsetref_regs_noindex(list,subsetsize,loadbitsize,sref,valuereg,extra_value_reg)
else
begin
if (sref.startbit <> 0) then
internalerror(2006080610);
a_load_subsetref_regs_index(list,subsetsize,loadbitsize,sref,valuereg,extra_value_reg);
end;
end;
{ store in destination }
{ avoid unnecessary sign extension and zeroing }
valuereg := makeregsize(list,valuereg,OS_INT);
destreg := makeregsize(list,destreg,OS_INT);
a_load_reg_reg(list,OS_INT,OS_INT,valuereg,destreg);
destreg := makeregsize(list,destreg,tosize);
end;
procedure tcg.a_load_reg_subsetref(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sref: tsubsetreference);
begin
a_load_regconst_subsetref_intern(list,fromsize,subsetsize,fromreg,sref,SL_REG);
end;
procedure tcg.a_load_regconst_subsetref_intern(list : TAsmList; fromsize, subsetsize: tcgsize; fromreg: tregister; const sref: tsubsetreference; slopt: tsubsetloadopt);
var
tmpreg, tmpindexreg, valuereg, extra_value_reg, maskreg: tregister;
tosreg, fromsreg: tsubsetregister;
tmpref: treference;
loadsize: tcgsize;
loadbitsize: byte;
extra_load: boolean;
begin
{ the register must be able to contain the requested value }
if (tcgsize2size[fromsize]*8 < sref.bitlen) then
internalerror(2006081613);
get_subsetref_load_info(sref,loadsize,extra_load);
loadbitsize := tcgsize2size[loadsize]*8;
{ load the (first part) of the bit sequence }
valuereg := cg.getintregister(list,OS_INT);
a_load_ref_reg(list,loadsize,OS_INT,sref.ref,valuereg);
{ constant offset of bit sequence? }
if not extra_load then
begin
if (sref.bitindexreg = NR_NO) then
begin
{ use subsetreg routine, it may have been overridden with an optimized version }
tosreg.subsetreg := valuereg;
tosreg.subsetregsize := OS_INT;
{ subsetregs always count bits from right to left }
if (target_info.endian = endian_big) then
tosreg.startbit := loadbitsize - (sref.startbit+sref.bitlen)
else
tosreg.startbit := sref.startbit;
tosreg.bitlen := sref.bitlen;
a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,tosreg,slopt);
end
else
begin
if (sref.startbit <> 0) then
internalerror(2006081710);
{ should be handled by normal code and will give wrong result }
{ on x86 for the '1 shl bitlen' below }
if (sref.bitlen = AIntBits) then
internalerror(2006081711);
{ calculated correct shiftcount for big endian }
tmpindexreg := getintregister(list,OS_INT);
a_load_reg_reg(list,OS_INT,OS_INT,sref.bitindexreg,tmpindexreg);
if (target_info.endian = endian_big) then
begin
a_op_const_reg(list,OP_SUB,OS_INT,loadbitsize-sref.bitlen,tmpindexreg);
a_op_reg_reg(list,OP_NEG,OS_INT,tmpindexreg,tmpindexreg);
end;
{ zero the bits we have to insert }
if (slopt <> SL_SETMAX) then
begin
maskreg := getintregister(list,OS_INT);
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen)-1),maskreg);
a_op_reg_reg(list,OP_SHL,OS_INT,tmpindexreg,maskreg);
a_op_reg_reg(list,OP_NOT,OS_INT,maskreg,maskreg);
a_op_reg_reg(list,OP_AND,OS_INT,maskreg,valuereg);
end;
{ insert the value }
if (slopt <> SL_SETZERO) then
begin
tmpreg := getintregister(list,OS_INT);
if (slopt <> SL_SETMAX) then
a_load_reg_reg(list,fromsize,OS_INT,fromreg,tmpreg)
else if (sref.bitlen <> AIntBits) then
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen) - 1), tmpreg)
else
a_load_const_reg(list,OS_INT,-1,tmpreg);
if (slopt <> SL_REGNOSRCMASK) then
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),tmpreg);
a_op_reg_reg(list,OP_SHL,OS_INT,tmpindexreg,tmpreg);
a_op_reg_reg(list,OP_OR,OS_INT,tmpreg,valuereg);
end;
end;
{ store back to memory }
valuereg := makeregsize(list,valuereg,loadsize);
a_load_reg_ref(list,loadsize,loadsize,valuereg,sref.ref);
exit;
end
else
begin
{ load next value }
extra_value_reg := getintregister(list,OS_INT);
tmpref := sref.ref;
inc(tmpref.offset,loadbitsize div 8);
{ should maybe be taken out too, can be done more efficiently }
{ on e.g. i386 with shld/shrd }
if (sref.bitindexreg = NR_NO) then
begin
a_load_ref_reg(list,loadsize,OS_INT,tmpref,extra_value_reg);
fromsreg.subsetreg := fromreg;
fromsreg.subsetregsize := fromsize;
tosreg.subsetreg := valuereg;
tosreg.subsetregsize := OS_INT;
{ transfer first part }
fromsreg.bitlen := loadbitsize-sref.startbit;
tosreg.bitlen := fromsreg.bitlen;
if (target_info.endian = endian_big) then
begin
{ valuereg must contain the upper bits of the value at bits [0..loadbitsize-startbit] }
{ upper bits of the value ... }
fromsreg.startbit := sref.bitlen-(loadbitsize-sref.startbit);
{ ... to bit 0 }
tosreg.startbit := 0
end
else
begin
{ valuereg must contain the lower bits of the value at bits [startbit..loadbitsize] }
{ lower bits of the value ... }
fromsreg.startbit := 0;
{ ... to startbit }
tosreg.startbit := sref.startbit;
end;
a_load_subsetreg_subsetreg(list,subsetsize,subsetsize,fromsreg,tosreg);
valuereg := makeregsize(list,valuereg,loadsize);
a_load_reg_ref(list,loadsize,loadsize,valuereg,sref.ref);
{ transfer second part }
if (target_info.endian = endian_big) then
begin
{ extra_value_reg must contain the lower bits of the value at bits }
{ [(loadbitsize-(bitlen-(loadbitsize-startbit)))..loadbitsize] }
{ (loadbitsize-(bitlen-(loadbitsize-startbit))) = 2*loadbitsize }
{ - bitlen - startbit }
fromsreg.startbit := 0;
tosreg.startbit := 2*loadbitsize - sref.bitlen - sref.startbit
end
else
begin
{ extra_value_reg must contain the upper bits of the value at bits [0..bitlen-(loadbitsize-startbit)] }
fromsreg.startbit := fromsreg.bitlen;
tosreg.startbit := 0;
end;
tosreg.subsetreg := extra_value_reg;
fromsreg.bitlen := sref.bitlen-fromsreg.bitlen;
tosreg.bitlen := fromsreg.bitlen;
a_load_subsetreg_subsetreg(list,fromsize,subsetsize,fromsreg,tosreg);
extra_value_reg := makeregsize(list,extra_value_reg,loadsize);
a_load_reg_ref(list,loadsize,loadsize,extra_value_reg,tmpref);
exit;
end
else
begin
if (sref.startbit <> 0) then
internalerror(2006081812);
{ should be handled by normal code and will give wrong result }
{ on x86 for the '1 shl bitlen' below }
if (sref.bitlen = AIntBits) then
internalerror(2006081713);
{ generate mask to zero the bits we have to insert }
if (slopt <> SL_SETMAX) then
begin
maskreg := getintregister(list,OS_INT);
if (target_info.endian = endian_big) then
begin
a_load_const_reg(list,OS_INT,aint(((aword(1) shl sref.bitlen)-1) shl (loadbitsize-sref.bitlen)),maskreg);
a_op_reg_reg(list,OP_SHR,OS_INT,sref.bitindexreg,maskreg);
end
else
begin
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen)-1),maskreg);
a_op_reg_reg(list,OP_SHL,OS_INT,sref.bitindexreg,maskreg);
end;
a_op_reg_reg(list,OP_NOT,OS_INT,maskreg,maskreg);
a_op_reg_reg(list,OP_AND,OS_INT,maskreg,valuereg);
end;
{ insert the value }
if (slopt <> SL_SETZERO) then
begin
tmpreg := getintregister(list,OS_INT);
if (slopt <> SL_SETMAX) then
a_load_reg_reg(list,fromsize,OS_INT,fromreg,tmpreg)
else if (sref.bitlen <> AIntBits) then
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen) - 1), tmpreg)
else
a_load_const_reg(list,OS_INT,-1,tmpreg);
if (target_info.endian = endian_big) then
begin
a_op_const_reg(list,OP_SHL,OS_INT,loadbitsize-sref.bitlen,tmpreg);
if not(slopt in [SL_REGNOSRCMASK,SL_SETMAX]) then
{ mask left over bits }
a_op_const_reg(list,OP_AND,OS_INT,aint(((aword(1) shl sref.bitlen)-1) shl (loadbitsize-sref.bitlen)),tmpreg);
a_op_reg_reg(list,OP_SHR,OS_INT,sref.bitindexreg,tmpreg);
end
else
begin
if not(slopt in [SL_REGNOSRCMASK,SL_SETMAX]) then
{ mask left over bits }
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),tmpreg);
a_op_reg_reg(list,OP_SHL,OS_INT,sref.bitindexreg,tmpreg);
end;
a_op_reg_reg(list,OP_OR,OS_INT,tmpreg,valuereg);
end;
valuereg := makeregsize(list,valuereg,loadsize);
a_load_reg_ref(list,loadsize,loadsize,valuereg,sref.ref);
a_load_ref_reg(list,loadsize,OS_INT,tmpref,extra_value_reg);
tmpindexreg := getintregister(list,OS_INT);
{ load current array value }
if (slopt <> SL_SETZERO) then
begin
tmpreg := getintregister(list,OS_INT);
if (slopt <> SL_SETMAX) then
a_load_reg_reg(list,fromsize,OS_INT,fromreg,tmpreg)
else if (sref.bitlen <> AIntBits) then
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen) - 1), tmpreg)
else
a_load_const_reg(list,OS_INT,-1,tmpreg);
end;
{ generate mask to zero the bits we have to insert }
if (slopt <> SL_SETMAX) then
begin
maskreg := getintregister(list,OS_INT);
if (target_info.endian = endian_big) then
begin
a_op_const_reg_reg(list,OP_ADD,OS_INT,sref.bitlen-2*loadbitsize,sref.bitindexreg,tmpindexreg);
a_op_reg_reg(list,OP_NEG,OS_INT,tmpindexreg,tmpindexreg);
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen)-1),maskreg);
a_op_reg_reg(list,OP_SHL,OS_INT,tmpindexreg,maskreg);
{$ifdef sparc}
{ on sparc, "shr X" = "shr (X and (bitsize-1))" -> fix so shr (x>32) = 0 }
if (loadbitsize = AIntBits) then
begin
{ if (tmpindexreg >= cpu_bit_size) then tmpreg := 1 else tmpreg := 0 }
a_op_const_reg_reg(list,OP_SHR,OS_INT,{$ifdef cpu64bit}6{$else}5{$endif},tmpindexreg,valuereg);
{ if (tmpindexreg = cpu_bit_size) then maskreg := 0 else maskreg := -1 }
a_op_const_reg(list,OP_SUB,OS_INT,1,valuereg);
{ if (tmpindexreg = cpu_bit_size) then maskreg := 0 }
if (slopt <> SL_SETZERO) then
a_op_reg_reg(list,OP_AND,OS_INT,valuereg,tmpreg);
a_op_reg_reg(list,OP_AND,OS_INT,valuereg,maskreg);
end;
{$endif sparc}
end
else
begin
{ Y-x = -(Y-x) }
a_op_const_reg_reg(list,OP_SUB,OS_INT,loadbitsize,sref.bitindexreg,tmpindexreg);
a_op_reg_reg(list,OP_NEG,OS_INT,tmpindexreg,tmpindexreg);
a_load_const_reg(list,OS_INT,aint((aword(1) shl sref.bitlen)-1),maskreg);
a_op_reg_reg(list,OP_SHR,OS_INT,tmpindexreg,maskreg);
{$ifdef x86}
{ on i386 "x shl 32 = x shl 0", on x86/64 "x shl 64 = x shl 0". Fix so it's 0. }
if (loadbitsize = AIntBits) then
begin
valuereg := getintregister(list,OS_INT);
{ if (tmpindexreg >= cpu_bit_size) then valuereg := 1 else valuereg := 0 }
a_op_const_reg_reg(list,OP_SHR,OS_INT,{$ifdef cpu64bit}6{$else}5{$endif},tmpindexreg,valuereg);
{ if (tmpindexreg = cpu_bit_size) then valuereg := 0 else valuereg := -1 }
a_op_const_reg(list,OP_SUB,OS_INT,1,valuereg);
{ if (tmpindexreg = cpu_bit_size) then tmpreg := maskreg := 0 }
if (slopt <> SL_SETZERO) then
a_op_reg_reg(list,OP_AND,OS_INT,valuereg,tmpreg);
a_op_reg_reg(list,OP_AND,OS_INT,valuereg,maskreg);
end;
{$endif x86}
end;
a_op_reg_reg(list,OP_NOT,OS_INT,maskreg,maskreg);
a_op_reg_reg(list,OP_AND,OS_INT,maskreg,extra_value_reg);
end;
if (slopt <> SL_SETZERO) then
begin
if (target_info.endian = endian_big) then
a_op_reg_reg(list,OP_SHL,OS_INT,tmpindexreg,tmpreg)
else
begin
if not(slopt in [SL_REGNOSRCMASK,SL_SETMAX]) then
a_op_const_reg(list,OP_AND,OS_INT,aint((aword(1) shl sref.bitlen)-1),tmpreg);
a_op_reg_reg(list,OP_SHR,OS_INT,tmpindexreg,tmpreg);
end;
a_op_reg_reg(list,OP_OR,OS_INT,tmpreg,extra_value_reg);
end;
extra_value_reg := makeregsize(list,extra_value_reg,loadsize);
a_load_reg_ref(list,loadsize,loadsize,extra_value_reg,tmpref);
end;
end;
end;
procedure tcg.a_load_subsetref_subsetref(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsref, tosref: tsubsetreference);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,tosubsetsize);
a_load_subsetref_reg(list,fromsubsetsize,tosubsetsize,fromsref,tmpreg);
a_load_reg_subsetref(list,tosubsetsize,tosubsetsize,tmpreg,tosref);
end;
procedure tcg.a_load_subsetref_ref(list : TAsmList; subsetsize, tosize: tcgsize; const sref: tsubsetreference; const destref: treference);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,tosize);
a_load_subsetref_reg(list,subsetsize,tosize,sref,tmpreg);
a_load_reg_ref(list,tosize,tosize,tmpreg,destref);
end;
procedure tcg.a_load_ref_subsetref(list : TAsmList; fromsize, subsetsize: tcgsize; const fromref: treference; const sref: tsubsetreference);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,subsetsize);
a_load_ref_reg(list,fromsize,subsetsize,fromref,tmpreg);
a_load_reg_subsetref(list,subsetsize,subsetsize,tmpreg,sref);
end;
procedure tcg.a_load_const_subsetref(list: TAsmlist; subsetsize: tcgsize; a: aint; const sref: tsubsetreference);
var
tmpreg: tregister;
slopt: tsubsetloadopt;
begin
{ perform masking of the source value in advance }
slopt := SL_REGNOSRCMASK;
if (sref.bitlen <> AIntBits) then
aword(a) := aword(a) and ((aword(1) shl sref.bitlen) -1);
if (
{ broken x86 "x shl regbitsize = x" }
((sref.bitlen <> AIntBits) and
((aword(a) and ((aword(1) shl sref.bitlen) -1)) = (aword(1) shl sref.bitlen) -1)) or
((sref.bitlen = AIntBits) and
(a = -1))
) then
slopt := SL_SETMAX
else if (a = 0) then
slopt := SL_SETZERO;
tmpreg := getintregister(list,subsetsize);
if not(slopt in [SL_SETZERO,SL_SETMAX]) then
a_load_const_reg(list,subsetsize,a,tmpreg);
a_load_regconst_subsetref_intern(list,subsetsize,subsetsize,tmpreg,sref,slopt);
end;
procedure tcg.a_load_subsetref_loc(list: TAsmlist; subsetsize: tcgsize; const sref: tsubsetreference; const loc: tlocation);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_subsetref_ref(list,subsetsize,loc.size,sref,loc.reference);
LOC_REGISTER,LOC_CREGISTER:
a_load_subsetref_reg(list,subsetsize,loc.size,sref,loc.register);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetref_subsetreg(list,subsetsize,loc.size,sref,loc.sreg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetref_subsetref(list,subsetsize,loc.size,sref,loc.sref);
else
internalerror(200608054);
end;
end;
procedure tcg.a_load_subsetref_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsref: tsubsetreference; const tosreg: tsubsetregister);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,tosubsetsize);
a_load_subsetref_reg(list,fromsubsetsize,tosubsetsize,fromsref,tmpreg);
a_load_reg_subsetreg(list,tosubsetsize,tosubsetsize,tmpreg,tosreg);
end;
procedure tcg.a_load_subsetreg_subsetref(list: TAsmlist; fromsubsetsize, tosubsetsize : tcgsize; const fromsreg: tsubsetregister; const tosref: tsubsetreference);
var
tmpreg: tregister;
begin
tmpreg := getintregister(list,tosubsetsize);
a_load_subsetreg_reg(list,fromsubsetsize,tosubsetsize,fromsreg,tmpreg);
a_load_reg_subsetref(list,tosubsetsize,tosubsetsize,tmpreg,tosref);
end;
{$ifdef rangeon}
{$r+}
{$undef rangeon}
{$endif}
{$ifdef overflowon}
{$q+}
{$undef overflowon}
{$endif}
procedure tcg.a_load_reg_ref_unaligned(list : TAsmList;fromsize,tosize : tcgsize;register : tregister;const ref : treference);
var
tmpref : treference;
tmpreg : tregister;
i : longint;
begin
if ref.alignment<>0 then
begin
tmpref:=ref;
{ we take care of the alignment now }
tmpref.alignment:=0;
case FromSize of
OS_16,OS_S16:
begin
tmpreg:=getintregister(list,OS_16);
a_load_reg_reg(list,fromsize,OS_16,register,tmpreg);
if target_info.endian=endian_big then
inc(tmpref.offset);
tmpreg:=makeregsize(list,tmpreg,OS_8);
a_load_reg_ref(list,OS_8,OS_8,tmpreg,tmpref);
tmpreg:=makeregsize(list,tmpreg,OS_16);
a_op_const_reg(list,OP_SHR,OS_16,8,tmpreg);
if target_info.endian=endian_big then
dec(tmpref.offset)
else
inc(tmpref.offset);
tmpreg:=makeregsize(list,tmpreg,OS_8);
a_load_reg_ref(list,OS_8,OS_8,tmpreg,tmpref);
end;
OS_32,OS_S32:
begin
tmpreg:=getintregister(list,OS_32);
a_load_reg_reg(list,fromsize,OS_32,register,tmpreg);
if target_info.endian=endian_big then
inc(tmpref.offset,3);
tmpreg:=makeregsize(list,tmpreg,OS_8);
a_load_reg_ref(list,OS_8,OS_8,tmpreg,tmpref);
tmpreg:=makeregsize(list,tmpreg,OS_32);
for i:=1 to 3 do
begin
a_op_const_reg(list,OP_SHR,OS_32,8,tmpreg);
if target_info.endian=endian_big then
dec(tmpref.offset)
else
inc(tmpref.offset);
tmpreg:=makeregsize(list,tmpreg,OS_8);
a_load_reg_ref(list,OS_8,OS_8,tmpreg,tmpref);
tmpreg:=makeregsize(list,tmpreg,OS_32);
end;
end
else
a_load_reg_ref(list,fromsize,tosize,register,tmpref);
end;
end
else
a_load_reg_ref(list,fromsize,tosize,register,ref);
end;
procedure tcg.a_load_ref_reg_unaligned(list : TAsmList;fromsize,tosize : tcgsize;const ref : treference;register : tregister);
var
tmpref : treference;
tmpreg,
tmpreg2 : tregister;
i : longint;
begin
if ref.alignment<>0 then
begin
tmpref:=ref;
{ we take care of the alignment now }
tmpref.alignment:=0;
case FromSize of
OS_16,OS_S16:
begin
{ first load in tmpreg, because the target register }
{ may be used in ref as well }
if target_info.endian=endian_little then
inc(tmpref.offset);
tmpreg:=getintregister(list,OS_8);
a_load_ref_reg(list,OS_8,OS_8,tmpref,tmpreg);
tmpreg:=makeregsize(list,tmpreg,OS_16);
a_op_const_reg(list,OP_SHL,OS_16,8,tmpreg);
if target_info.endian=endian_little then
dec(tmpref.offset)
else
inc(tmpref.offset);
a_load_ref_reg(list,OS_8,OS_16,tmpref,register);
a_op_reg_reg(list,OP_OR,OS_16,tmpreg,register);
end;
OS_32,OS_S32:
begin
if target_info.endian=endian_little then
inc(tmpref.offset,3);
tmpreg:=getintregister(list,OS_32);
a_load_ref_reg(list,OS_8,OS_32,tmpref,tmpreg);
tmpreg2:=getintregister(list,OS_32);
for i:=1 to 3 do
begin
a_op_const_reg(list,OP_SHL,OS_32,8,tmpreg);
if target_info.endian=endian_little then
dec(tmpref.offset)
else
inc(tmpref.offset);
a_load_ref_reg(list,OS_8,OS_32,tmpref,tmpreg2);
a_op_reg_reg(list,OP_OR,OS_32,tmpreg2,tmpreg);
end;
a_load_reg_reg(list,OS_32,OS_32,tmpreg,register);
end
else
a_load_ref_reg(list,fromsize,tosize,tmpref,register);
end;
end
else
a_load_ref_reg(list,fromsize,tosize,ref,register);
end;
procedure tcg.a_load_ref_ref(list : TAsmList;fromsize,tosize : tcgsize;const sref : treference;const dref : treference);
var
tmpreg: tregister;
begin
{ verify if we have the same reference }
if references_equal(sref,dref) then
exit;
tmpreg:=getintregister(list,tosize);
a_load_ref_reg(list,fromsize,tosize,sref,tmpreg);
a_load_reg_ref(list,tosize,tosize,tmpreg,dref);
end;
procedure tcg.a_load_const_ref(list : TAsmList;size : tcgsize;a : aint;const ref : treference);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list,size);
a_load_const_reg(list,size,a,tmpreg);
a_load_reg_ref(list,size,size,tmpreg,ref);
end;
procedure tcg.a_load_const_loc(list : TAsmList;a : aint;const loc: tlocation);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_const_ref(list,loc.size,a,loc.reference);
LOC_REGISTER,LOC_CREGISTER:
a_load_const_reg(list,loc.size,a,loc.register);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_const_subsetreg(list,loc.size,a,loc.sreg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_const_subsetref(list,loc.size,a,loc.sref);
else
internalerror(200203272);
end;
end;
procedure tcg.a_load_reg_loc(list : TAsmList;fromsize : tcgsize;reg : tregister;const loc: tlocation);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_reg_ref(list,fromsize,loc.size,reg,loc.reference);
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_reg(list,fromsize,loc.size,reg,loc.register);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_reg_subsetreg(list,fromsize,loc.size,reg,loc.sreg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_reg_subsetref(list,fromsize,loc.size,reg,loc.sref);
else
internalerror(200203271);
end;
end;
procedure tcg.a_load_loc_reg(list : TAsmList; tosize: tcgsize; const loc: tlocation; reg : tregister);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_ref_reg(list,loc.size,tosize,loc.reference,reg);
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_reg(list,loc.size,tosize,loc.register,reg);
LOC_CONSTANT:
a_load_const_reg(list,tosize,loc.value,reg);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetreg_reg(list,loc.size,tosize,loc.sreg,reg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetref_reg(list,loc.size,tosize,loc.sref,reg);
else
internalerror(200109092);
end;
end;
procedure tcg.a_load_loc_ref(list : TAsmList;tosize: tcgsize; const loc: tlocation; const ref : treference);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_ref_ref(list,loc.size,tosize,loc.reference,ref);
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_ref(list,loc.size,tosize,loc.register,ref);
LOC_CONSTANT:
a_load_const_ref(list,tosize,loc.value,ref);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetreg_ref(list,loc.size,tosize,loc.sreg,ref);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetref_ref(list,loc.size,tosize,loc.sref,ref);
else
internalerror(200109302);
end;
end;
procedure tcg.a_load_loc_subsetreg(list : TAsmList; subsetsize: tcgsize; const loc: tlocation; const sreg : tsubsetregister);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_ref_subsetreg(list,loc.size,subsetsize,loc.reference,sreg);
LOC_REGISTER,LOC_CREGISTER:
a_load_reg_subsetreg(list,loc.size,subsetsize,loc.register,sreg);
LOC_CONSTANT:
a_load_const_subsetreg(list,subsetsize,loc.value,sreg);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetreg_subsetreg(list,loc.size,subsetsize,loc.sreg,sreg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetref_subsetreg(list,loc.size,subsetsize,loc.sref,sreg);
else
internalerror(2006052310);
end;
end;
procedure tcg.a_load_subsetreg_loc(list: TAsmlist; subsetsize: tcgsize; const sreg: tsubsetregister; const loc: tlocation);
begin
case loc.loc of
LOC_REFERENCE,LOC_CREFERENCE:
a_load_subsetreg_ref(list,subsetsize,loc.size,sreg,loc.reference);
LOC_REGISTER,LOC_CREGISTER:
a_load_subsetreg_reg(list,subsetsize,loc.size,sreg,loc.register);
LOC_SUBSETREG,LOC_CSUBSETREG:
a_load_subsetreg_subsetreg(list,subsetsize,loc.size,sreg,loc.sreg);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load_subsetreg_subsetref(list,subsetsize,loc.size,sreg,loc.sref);
else
internalerror(2006051510);
end;
end;
procedure tcg.optimize_op_const(var op: topcg; var a : aint);
var
powerval : longint;
begin
case op of
OP_OR :
begin
{ or with zero returns same result }
if a = 0 then
op:=OP_NONE
else
{ or with max returns max }
if a = -1 then
op:=OP_MOVE;
end;
OP_AND :
begin
{ and with max returns same result }
if (a = -1) then
op:=OP_NONE
else
{ and with 0 returns 0 }
if a=0 then
op:=OP_MOVE;
end;
OP_DIV :
begin
{ division by 1 returns result }
if a = 1 then
op:=OP_NONE
else if ispowerof2(int64(a), powerval) and not(cs_check_overflow in current_settings.localswitches) then
begin
a := powerval;
op:= OP_SHR;
end;
end;
OP_IDIV:
begin
if a = 1 then
op:=OP_NONE;
end;
OP_MUL,OP_IMUL:
begin
if a = 1 then
op:=OP_NONE
else
if a=0 then
op:=OP_MOVE
else if ispowerof2(int64(a), powerval) and not(cs_check_overflow in current_settings.localswitches) then
begin
a := powerval;
op:= OP_SHL;
end;
end;
OP_ADD,OP_SUB:
begin
if a = 0 then
op:=OP_NONE;
end;
OP_SAR,OP_SHL,OP_SHR:
begin
if a = 0 then
op:=OP_NONE;
end;
end;
end;
procedure tcg.a_loadfpu_loc_reg(list: TAsmList; tosize: tcgsize; const loc: tlocation; const reg: tregister);
begin
case loc.loc of
LOC_REFERENCE, LOC_CREFERENCE:
a_loadfpu_ref_reg(list,loc.size,tosize,loc.reference,reg);
LOC_FPUREGISTER, LOC_CFPUREGISTER:
a_loadfpu_reg_reg(list,loc.size,tosize,loc.register,reg);
else
internalerror(200203301);
end;
end;
procedure tcg.a_loadfpu_reg_loc(list: TAsmList; fromsize: tcgsize; const reg: tregister; const loc: tlocation);
begin
case loc.loc of
LOC_REFERENCE, LOC_CREFERENCE:
a_loadfpu_reg_ref(list,fromsize,loc.size,reg,loc.reference);
LOC_FPUREGISTER, LOC_CFPUREGISTER:
a_loadfpu_reg_reg(list,fromsize,loc.size,reg,loc.register);
else
internalerror(48991);
end;
end;
procedure tcg.a_paramfpu_reg(list : TAsmList;size : tcgsize;const r : tregister;const cgpara : TCGPara);
var
ref : treference;
begin
case cgpara.location^.loc of
LOC_FPUREGISTER,LOC_CFPUREGISTER:
begin
cgpara.check_simple_location;
a_loadfpu_reg_reg(list,size,size,r,cgpara.location^.register);
end;
LOC_REFERENCE,LOC_CREFERENCE:
begin
cgpara.check_simple_location;
reference_reset_base(ref,cgpara.location^.reference.index,cgpara.location^.reference.offset);
a_loadfpu_reg_ref(list,size,size,r,ref);
end;
LOC_REGISTER,LOC_CREGISTER:
begin
{ paramfpu_ref does the check_simpe_location check here if necessary }
tg.GetTemp(list,TCGSize2Size[size],tt_normal,ref);
a_loadfpu_reg_ref(list,size,size,r,ref);
a_paramfpu_ref(list,size,ref,cgpara);
tg.Ungettemp(list,ref);
end;
else
internalerror(2002071004);
end;
end;
procedure tcg.a_paramfpu_ref(list : TAsmList;size : tcgsize;const ref : treference;const cgpara : TCGPara);
var
href : treference;
begin
cgpara.check_simple_location;
case cgpara.location^.loc of
LOC_FPUREGISTER,LOC_CFPUREGISTER:
a_loadfpu_ref_reg(list,size,size,ref,cgpara.location^.register);
LOC_REFERENCE,LOC_CREFERENCE:
begin
reference_reset_base(href,cgpara.location^.reference.index,cgpara.location^.reference.offset);
{ concatcopy should choose the best way to copy the data }
g_concatcopy(list,ref,href,tcgsize2size[size]);
end;
else
internalerror(200402201);
end;
end;
procedure tcg.a_op_const_ref(list : TAsmList; Op: TOpCG; size: TCGSize; a: aint; const ref: TReference);
var
tmpreg : tregister;
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_op_const_reg(list,op,size,a,tmpreg);
a_load_reg_ref(list,size,size,tmpreg,ref);
end;
procedure tcg.a_op_const_subsetreg(list : TAsmList; Op : TOpCG; size, subsetsize : TCGSize; a : aint; const sreg: tsubsetregister);
var
tmpreg: tregister;
begin
tmpreg := cg.getintregister(list, size);
a_load_subsetreg_reg(list,subsetsize,size,sreg,tmpreg);
a_op_const_reg(list,op,size,a,tmpreg);
a_load_reg_subsetreg(list,size,subsetsize,tmpreg,sreg);
end;
procedure tcg.a_op_const_subsetref(list : TAsmList; Op : TOpCG; size, subsetsize : TCGSize; a : aint; const sref: tsubsetreference);
var
tmpreg: tregister;
begin
tmpreg := cg.getintregister(list, size);
a_load_subsetref_reg(list,subsetsize,size,sref,tmpreg);
a_op_const_reg(list,op,size,a,tmpreg);
a_load_reg_subsetref(list,size,subsetsize,tmpreg,sref);
end;
procedure tcg.a_op_const_loc(list : TAsmList; Op: TOpCG; a: aint; const loc: tlocation);
begin
case loc.loc of
LOC_REGISTER, LOC_CREGISTER:
a_op_const_reg(list,op,loc.size,a,loc.register);
LOC_REFERENCE, LOC_CREFERENCE:
a_op_const_ref(list,op,loc.size,a,loc.reference);
LOC_SUBSETREG, LOC_CSUBSETREG:
a_op_const_subsetreg(list,op,loc.size,loc.size,a,loc.sreg);
LOC_SUBSETREF, LOC_CSUBSETREF:
a_op_const_subsetref(list,op,loc.size,loc.size,a,loc.sref);
else
internalerror(200109061);
end;
end;
procedure tcg.a_op_reg_ref(list : TAsmList; Op: TOpCG; size: TCGSize;reg: TRegister; const ref: TReference);
var
tmpreg : tregister;
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_op_reg_reg(list,op,size,reg,tmpreg);
a_load_reg_ref(list,size,size,tmpreg,ref);
end;
procedure tcg.a_op_ref_reg(list : TAsmList; Op: TOpCG; size: TCGSize; const ref: TReference; reg: TRegister);
var
tmpreg: tregister;
begin
case op of
OP_NOT,OP_NEG:
{ handle it as "load ref,reg; op reg" }
begin
a_load_ref_reg(list,size,size,ref,reg);
a_op_reg_reg(list,op,size,reg,reg);
end;
else
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_op_reg_reg(list,op,size,tmpreg,reg);
end;
end;
end;
procedure tcg.a_op_reg_subsetreg(list : TAsmList; Op : TOpCG; opsize, subsetsize : TCGSize; reg: TRegister; const sreg: tsubsetregister);
var
tmpreg: tregister;
begin
tmpreg := cg.getintregister(list, opsize);
a_load_subsetreg_reg(list,subsetsize,opsize,sreg,tmpreg);
a_op_reg_reg(list,op,opsize,reg,tmpreg);
a_load_reg_subsetreg(list,opsize,subsetsize,tmpreg,sreg);
end;
procedure tcg.a_op_reg_subsetref(list : TAsmList; Op : TOpCG; opsize, subsetsize : TCGSize; reg: TRegister; const sref: tsubsetreference);
var
tmpreg: tregister;
begin
tmpreg := cg.getintregister(list, opsize);
a_load_subsetref_reg(list,subsetsize,opsize,sref,tmpreg);
a_op_reg_reg(list,op,opsize,reg,tmpreg);
a_load_reg_subsetref(list,opsize,subsetsize,tmpreg,sref);
end;
procedure tcg.a_op_reg_loc(list : TAsmList; Op: TOpCG; reg: tregister; const loc: tlocation);
begin
case loc.loc of
LOC_REGISTER, LOC_CREGISTER:
a_op_reg_reg(list,op,loc.size,reg,loc.register);
LOC_REFERENCE, LOC_CREFERENCE:
a_op_reg_ref(list,op,loc.size,reg,loc.reference);
LOC_SUBSETREG, LOC_CSUBSETREG:
a_op_reg_subsetreg(list,op,loc.size,loc.size,reg,loc.sreg);
LOC_SUBSETREF, LOC_CSUBSETREF:
a_op_reg_subsetref(list,op,loc.size,loc.size,reg,loc.sref);
else
internalerror(200109061);
end;
end;
procedure tcg.a_op_ref_loc(list : TAsmList; Op: TOpCG; const ref: TReference; const loc: tlocation);
var
tmpreg: tregister;
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER:
a_op_ref_reg(list,op,loc.size,ref,loc.register);
LOC_REFERENCE,LOC_CREFERENCE:
begin
tmpreg:=getintregister(list,loc.size);
a_load_ref_reg(list,loc.size,loc.size,ref,tmpreg);
a_op_reg_ref(list,op,loc.size,tmpreg,loc.reference);
end;
LOC_SUBSETREG, LOC_CSUBSETREG:
begin
tmpreg:=getintregister(list,loc.size);
a_load_subsetreg_reg(list,loc.size,loc.size,loc.sreg,tmpreg);
a_op_ref_reg(list,op,loc.size,ref,tmpreg);
a_load_reg_subsetreg(list,loc.size,loc.size,tmpreg,loc.sreg);
end;
LOC_SUBSETREF, LOC_CSUBSETREF:
begin
tmpreg:=getintregister(list,loc.size);
a_load_subsetreF_reg(list,loc.size,loc.size,loc.sref,tmpreg);
a_op_ref_reg(list,op,loc.size,ref,tmpreg);
a_load_reg_subsetref(list,loc.size,loc.size,tmpreg,loc.sref);
end;
else
internalerror(200109061);
end;
end;
procedure Tcg.a_op_const_reg_reg(list:TAsmList;op:Topcg;size:Tcgsize;
a:aint;src,dst:Tregister);
begin
a_load_reg_reg(list,size,size,src,dst);
a_op_const_reg(list,op,size,a,dst);
end;
procedure tcg.a_op_reg_reg_reg(list: TAsmList; op: TOpCg;
size: tcgsize; src1, src2, dst: tregister);
var
tmpreg: tregister;
begin
if (dst<>src1) then
begin
a_load_reg_reg(list,size,size,src2,dst);
a_op_reg_reg(list,op,size,src1,dst);
end
else
begin
tmpreg:=getintregister(list,size);
a_load_reg_reg(list,size,size,src2,tmpreg);
a_op_reg_reg(list,op,size,src1,tmpreg);
a_load_reg_reg(list,size,size,tmpreg,dst);
end;
end;
procedure tcg.a_op_const_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tcgsize; a: aint; src, dst: tregister;setflags : boolean;var ovloc : tlocation);
begin
a_op_const_reg_reg(list,op,size,a,src,dst);
ovloc.loc:=LOC_VOID;
end;
procedure tcg.a_op_reg_reg_reg_checkoverflow(list: TAsmList; op: TOpCg; size: tcgsize; src1, src2, dst: tregister;setflags : boolean;var ovloc : tlocation);
begin
a_op_reg_reg_reg(list,op,size,src1,src2,dst);
ovloc.loc:=LOC_VOID;
end;
procedure tcg.a_cmp_const_ref_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;const ref : treference;
l : tasmlabel);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_cmp_const_reg_label(list,size,cmp_op,a,tmpreg,l);
end;
procedure tcg.a_cmp_const_loc_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;a : aint;const loc : tlocation;
l : tasmlabel);
var
tmpreg : tregister;
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER:
a_cmp_const_reg_label(list,size,cmp_op,a,loc.register,l);
LOC_REFERENCE,LOC_CREFERENCE:
a_cmp_const_ref_label(list,size,cmp_op,a,loc.reference,l);
LOC_SUBSETREG, LOC_CSUBSETREG:
begin
tmpreg:=getintregister(list,size);
a_load_subsetreg_reg(list,loc.size,size,loc.sreg,tmpreg);
a_cmp_const_reg_label(list,size,cmp_op,a,tmpreg,l);
end;
LOC_SUBSETREF, LOC_CSUBSETREF:
begin
tmpreg:=getintregister(list,size);
a_load_subsetref_reg(list,loc.size,size,loc.sref,tmpreg);
a_cmp_const_reg_label(list,size,cmp_op,a,tmpreg,l);
end;
else
internalerror(200109061);
end;
end;
procedure tcg.a_cmp_ref_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; const ref: treference; reg : tregister; l : tasmlabel);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_cmp_reg_reg_label(list,size,cmp_op,tmpreg,reg,l);
end;
procedure tcg.a_cmp_reg_ref_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; reg : tregister; const ref: treference; l : tasmlabel);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,ref,tmpreg);
a_cmp_reg_reg_label(list,size,cmp_op,reg,tmpreg,l);
end;
procedure tcg.a_cmp_reg_loc_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; reg: tregister; const loc: tlocation; l : tasmlabel);
begin
a_cmp_loc_reg_label(list,size,swap_opcmp(cmp_op),loc,reg,l);
end;
procedure tcg.a_cmp_loc_reg_label(list : TAsmList;size : tcgsize;cmp_op : topcmp; const loc: tlocation; reg : tregister; l : tasmlabel);
begin
case loc.loc of
LOC_REGISTER,
LOC_CREGISTER:
a_cmp_reg_reg_label(list,size,cmp_op,loc.register,reg,l);
LOC_REFERENCE,
LOC_CREFERENCE :
a_cmp_ref_reg_label(list,size,cmp_op,loc.reference,reg,l);
LOC_CONSTANT:
a_cmp_const_reg_label(list,size,cmp_op,loc.value,reg,l);
LOC_SUBSETREG,
LOC_CSUBSETREG:
a_cmp_subsetreg_reg_label(list,loc.size,size,cmp_op,loc.sreg,reg,l);
LOC_SUBSETREF,
LOC_CSUBSETREF:
a_cmp_subsetref_reg_label(list,loc.size,size,cmp_op,loc.sref,reg,l);
else
internalerror(200203231);
end;
end;
procedure tcg.a_cmp_subsetreg_reg_label(list : TAsmList; subsetsize : tcgsize; cmpsize : tcgsize; cmp_op : topcmp; const sreg: tsubsetregister; reg : tregister; l : tasmlabel);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list, cmpsize);
a_load_subsetreg_reg(list,subsetsize,cmpsize,sreg,tmpreg);
a_cmp_reg_reg_label(list,cmpsize,cmp_op,tmpreg,reg,l);
end;
procedure tcg.a_cmp_subsetref_reg_label(list : TAsmList; subsetsize : tcgsize; cmpsize : tcgsize; cmp_op : topcmp; const sref: tsubsetreference; reg : tregister; l : tasmlabel);
var
tmpreg: tregister;
begin
tmpreg:=getintregister(list, cmpsize);
a_load_subsetref_reg(list,subsetsize,cmpsize,sref,tmpreg);
a_cmp_reg_reg_label(list,cmpsize,cmp_op,tmpreg,reg,l);
end;
procedure tcg.a_cmp_ref_loc_label(list : TAsmList;size : tcgsize;cmp_op : topcmp;const ref: treference;const loc : tlocation;
l : tasmlabel);
var
tmpreg: tregister;
begin
case loc.loc of
LOC_REGISTER,LOC_CREGISTER:
a_cmp_ref_reg_label(list,size,cmp_op,ref,loc.register,l);
LOC_REFERENCE,LOC_CREFERENCE:
begin
tmpreg:=getintregister(list,size);
a_load_ref_reg(list,size,size,loc.reference,tmpreg);
a_cmp_ref_reg_label(list,size,cmp_op,ref,tmpreg,l);
end;
LOC_SUBSETREG, LOC_CSUBSETREG:
begin
tmpreg:=getintregister(list, size);
a_load_ref_reg(list,size,size,loc.reference,tmpreg);
a_cmp_subsetreg_reg_label(list,loc.size,size,swap_opcmp(cmp_op),loc.sreg,tmpreg,l);
end;
LOC_SUBSETREF, LOC_CSUBSETREF:
begin
tmpreg:=getintregister(list, size);
a_load_ref_reg(list,size,size,loc.reference,tmpreg);
a_cmp_subsetref_reg_label(list,loc.size,size,swap_opcmp(cmp_op),loc.sref,tmpreg,l);
end;
else
internalerror(200109061);
end;
end;
procedure tcg.a_loadmm_loc_reg(list: TAsmList; size: tcgsize; const loc: tlocation; const reg: tregister;shuffle : pmmshuffle);
begin
case loc.loc of
LOC_MMREGISTER,LOC_CMMREGISTER:
a_loadmm_reg_reg(list,loc.size,size,loc.register,reg,shuffle);
LOC_REFERENCE,LOC_CREFERENCE:
a_loadmm_ref_reg(list,loc.size,size,loc.reference,reg,shuffle);
else
internalerror(200310121);
end;
end;
procedure tcg.a_loadmm_reg_loc(list: TAsmList; size: tcgsize; const reg: tregister; const loc: tlocation;shuffle : pmmshuffle);
begin
case loc.loc of
LOC_MMREGISTER,LOC_CMMREGISTER:
a_loadmm_reg_reg(list,size,loc.size,reg,loc.register,shuffle);
LOC_REFERENCE,LOC_CREFERENCE:
a_loadmm_reg_ref(list,size,loc.size,reg,loc.reference,shuffle);
else
internalerror(200310122);
end;
end;
procedure tcg.a_parammm_reg(list: TAsmList; size: tcgsize; reg: tregister;const cgpara : TCGPara;shuffle : pmmshuffle);
var
href : treference;
begin
cgpara.check_simple_location;
case cgpara.location^.loc of
LOC_MMREGISTER,LOC_CMMREGISTER:
a_loadmm_reg_reg(list,size,cgpara.location^.size,reg,cgpara.location^.register,shuffle);
LOC_REFERENCE,LOC_CREFERENCE:
begin
reference_reset_base(href,cgpara.location^.reference.index,cgpara.location^.reference.offset);
a_loadmm_reg_ref(list,size,cgpara.location^.size,reg,href,shuffle);
end
else
internalerror(200310123);
end;
end;
procedure tcg.a_parammm_ref(list: TAsmList; size: tcgsize;const ref: treference;const cgpara : TCGPara;shuffle : pmmshuffle);
var
hr : tregister;
hs : tmmshuffle;
begin
cgpara.check_simple_location;
hr:=getmmregister(list,cgpara.location^.size);
a_loadmm_ref_reg(list,size,cgpara.location^.size,ref,hr,shuffle);
if realshuffle(shuffle) then
begin
hs:=shuffle^;
removeshuffles(hs);
a_parammm_reg(list,cgpara.location^.size,hr,cgpara,@hs);
end
else
a_parammm_reg(list,cgpara.location^.size,hr,cgpara,shuffle);
end;
procedure tcg.a_parammm_loc(list: TAsmList;const loc: tlocation; const cgpara : TCGPara;shuffle : pmmshuffle);
begin
case loc.loc of
LOC_MMREGISTER,LOC_CMMREGISTER:
a_parammm_reg(list,loc.size,loc.register,cgpara,shuffle);
LOC_REFERENCE,LOC_CREFERENCE:
a_parammm_ref(list,loc.size,loc.reference,cgpara,shuffle);
else
internalerror(200310123);
end;
end;
procedure tcg.a_opmm_ref_reg(list: TAsmList; Op: TOpCG; size : tcgsize;const ref: treference; reg: tregister;shuffle : pmmshuffle);
var
hr : tregister;
hs : tmmshuffle;
begin
hr:=getmmregister(list,size);
a_loadmm_ref_reg(list,size,size,ref,hr,shuffle);
if realshuffle(shuffle) then
begin
hs:=shuffle^;
removeshuffles(hs);
a_opmm_reg_reg(list,op,size,hr,reg,@hs);
end
else
a_opmm_reg_reg(list,op,size,hr,reg,shuffle);
end;
procedure tcg.a_opmm_reg_ref(list: TAsmList; Op: TOpCG; size : tcgsize;reg: tregister; const ref: treference; shuffle : pmmshuffle);
var
hr : tregister;
hs : tmmshuffle;
begin
hr:=getmmregister(list,size);
a_loadmm_ref_reg(list,size,size,ref,hr,shuffle);
if realshuffle(shuffle) then
begin
hs:=shuffle^;
removeshuffles(hs);
a_opmm_reg_reg(list,op,size,reg,hr,@hs);
a_loadmm_reg_ref(list,size,size,hr,ref,@hs);
end
else
begin
a_opmm_reg_reg(list,op,size,reg,hr,shuffle);
a_loadmm_reg_ref(list,size,size,hr,ref,shuffle);
end;
end;
procedure tcg.a_opmm_loc_reg(list: TAsmList; Op: TOpCG; size : tcgsize;const loc: tlocation; reg: tregister;shuffle : pmmshuffle);
begin
case loc.loc of
LOC_CMMREGISTER,LOC_MMREGISTER:
a_opmm_reg_reg(list,op,size,loc.register,reg,shuffle);
LOC_CREFERENCE,LOC_REFERENCE:
a_opmm_ref_reg(list,op,size,loc.reference,reg,shuffle);
else
internalerror(200312232);
end;
end;
procedure tcg.g_concatcopy_unaligned(list : TAsmList;const source,dest : treference;len : aint);
begin
g_concatcopy(list,source,dest,len);
end;
procedure tcg.g_copyshortstring(list : TAsmList;const source,dest : treference;len:byte);
var
cgpara1,cgpara2,cgpara3 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
cgpara3.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
paramanager.getintparaloc(pocall_default,3,cgpara3);
paramanager.allocparaloc(list,cgpara3);
a_paramaddr_ref(list,dest,cgpara3);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,source,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_param_const(list,OS_INT,len,cgpara1);
paramanager.freeparaloc(list,cgpara3);
paramanager.freeparaloc(list,cgpara2);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_SHORTSTR_ASSIGN');
deallocallcpuregisters(list);
cgpara3.done;
cgpara2.done;
cgpara1.done;
end;
procedure tcg.g_copyvariant(list : TAsmList;const source,dest : treference);
var
cgpara1,cgpara2 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,dest,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_paramaddr_ref(list,source,cgpara1);
paramanager.freeparaloc(list,cgpara2);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_VARIANT_COPY_OVERWRITE');
deallocallcpuregisters(list);
cgpara2.done;
cgpara1.done;
end;
procedure tcg.g_incrrefcount(list : TAsmList;t: tdef; const ref: treference);
var
href : treference;
incrfunc : string;
cgpara1,cgpara2 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
if is_interfacecom(t) then
incrfunc:='FPC_INTF_INCR_REF'
else if is_ansistring(t) then
incrfunc:='FPC_ANSISTR_INCR_REF'
else if is_widestring(t) then
incrfunc:='FPC_WIDESTR_INCR_REF'
else if is_dynamic_array(t) then
incrfunc:='FPC_DYNARRAY_INCR_REF'
else
incrfunc:='';
{ call the special incr function or the generic addref }
if incrfunc<>'' then
begin
paramanager.allocparaloc(list,cgpara1);
{ widestrings aren't ref. counted on all platforms so we need the address
to create a real copy }
if is_widestring(t) then
a_paramaddr_ref(list,ref,cgpara1)
else
{ these functions get the pointer by value }
a_param_ref(list,OS_ADDR,ref,cgpara1);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,incrfunc);
deallocallcpuregisters(list);
end
else
begin
reference_reset_symbol(href,RTTIWriter.get_rtti_label(t,initrtti),0);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,href,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_paramaddr_ref(list,ref,cgpara1);
paramanager.freeparaloc(list,cgpara1);
paramanager.freeparaloc(list,cgpara2);
allocallcpuregisters(list);
a_call_name(list,'FPC_ADDREF');
deallocallcpuregisters(list);
end;
cgpara2.done;
cgpara1.done;
end;
procedure tcg.g_decrrefcount(list : TAsmList;t: tdef; const ref: treference);
var
href : treference;
decrfunc : string;
needrtti : boolean;
cgpara1,cgpara2 : TCGPara;
tempreg1,tempreg2 : TRegister;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
needrtti:=false;
if is_interfacecom(t) then
decrfunc:='FPC_INTF_DECR_REF'
else if is_ansistring(t) then
decrfunc:='FPC_ANSISTR_DECR_REF'
else if is_widestring(t) then
decrfunc:='FPC_WIDESTR_DECR_REF'
else if is_dynamic_array(t) then
begin
decrfunc:='FPC_DYNARRAY_DECR_REF';
needrtti:=true;
end
else
decrfunc:='';
{ call the special decr function or the generic decref }
if decrfunc<>'' then
begin
if needrtti then
begin
reference_reset_symbol(href,RTTIWriter.get_rtti_label(t,initrtti),0);
tempreg2:=getaddressregister(list);
a_loadaddr_ref_reg(list,href,tempreg2);
end;
tempreg1:=getaddressregister(list);
a_loadaddr_ref_reg(list,ref,tempreg1);
if needrtti then
begin
paramanager.allocparaloc(list,cgpara2);
a_param_reg(list,OS_ADDR,tempreg2,cgpara2);
paramanager.freeparaloc(list,cgpara2);
end;
paramanager.allocparaloc(list,cgpara1);
a_param_reg(list,OS_ADDR,tempreg1,cgpara1);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,decrfunc);
deallocallcpuregisters(list);
end
else
begin
reference_reset_symbol(href,RTTIWriter.get_rtti_label(t,initrtti),0);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,href,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_paramaddr_ref(list,ref,cgpara1);
paramanager.freeparaloc(list,cgpara1);
paramanager.freeparaloc(list,cgpara2);
allocallcpuregisters(list);
a_call_name(list,'FPC_DECREF');
deallocallcpuregisters(list);
end;
cgpara2.done;
cgpara1.done;
end;
procedure tcg.g_initialize(list : TAsmList;t : tdef;const ref : treference);
var
href : treference;
cgpara1,cgpara2 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
if is_ansistring(t) or
is_widestring(t) or
is_interfacecom(t) or
is_dynamic_array(t) then
a_load_const_ref(list,OS_ADDR,0,ref)
else
begin
reference_reset_symbol(href,RTTIWriter.get_rtti_label(t,initrtti),0);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,href,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_paramaddr_ref(list,ref,cgpara1);
paramanager.freeparaloc(list,cgpara1);
paramanager.freeparaloc(list,cgpara2);
allocallcpuregisters(list);
a_call_name(list,'FPC_INITIALIZE');
deallocallcpuregisters(list);
end;
cgpara1.done;
cgpara2.done;
end;
procedure tcg.g_finalize(list : TAsmList;t : tdef;const ref : treference);
var
href : treference;
cgpara1,cgpara2 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
if is_ansistring(t) or
is_widestring(t) or
is_interfacecom(t) then
begin
g_decrrefcount(list,t,ref);
a_load_const_ref(list,OS_ADDR,0,ref);
end
else
begin
reference_reset_symbol(href,RTTIWriter.get_rtti_label(t,initrtti),0);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,href,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_paramaddr_ref(list,ref,cgpara1);
paramanager.freeparaloc(list,cgpara1);
paramanager.freeparaloc(list,cgpara2);
allocallcpuregisters(list);
a_call_name(list,'FPC_FINALIZE');
deallocallcpuregisters(list);
end;
cgpara1.done;
cgpara2.done;
end;
procedure tcg.g_rangecheck(list: TAsmList; const l:tlocation;fromdef,todef: tdef);
{ generate range checking code for the value at location p. The type }
{ type used is checked against todefs ranges. fromdef (p.resultdef) }
{ is the original type used at that location. When both defs are equal }
{ the check is also insert (needed for succ,pref,inc,dec) }
const
aintmax=high(aint);
var
neglabel : tasmlabel;
hreg : tregister;
lto,hto,
lfrom,hfrom : TConstExprInt;
fromsize, tosize: cardinal;
from_signed, to_signed: boolean;
begin
{ range checking on and range checkable value? }
if not(cs_check_range in current_settings.localswitches) or
not(fromdef.typ in [orddef,enumdef]) then
exit;
{$ifndef cpu64bit}
{ handle 64bit rangechecks separate for 32bit processors }
if is_64bit(fromdef) or is_64bit(todef) then
begin
cg64.g_rangecheck64(list,l,fromdef,todef);
exit;
end;
{$endif cpu64bit}
{ only check when assigning to scalar, subranges are different, }
{ when todef=fromdef then the check is always generated }
getrange(fromdef,lfrom,hfrom);
getrange(todef,lto,hto);
from_signed := is_signed(fromdef);
to_signed := is_signed(todef);
{ check the rangedef of the array, not the array itself }
{ (only change now, since getrange needs the arraydef) }
if (todef.typ = arraydef) then
todef := tarraydef(todef).rangedef;
{ no range check if from and to are equal and are both longint/dword }
{ no range check if from and to are equal and are both longint/dword }
{ (if we have a 32bit processor) or int64/qword, since such }
{ operations can at most cause overflows (JM) }
{ Note that these checks are mostly processor independent, they only }
{ have to be changed once we introduce 64bit subrange types }
{$ifdef cpu64bit}
if (fromdef = todef) and
(fromdef.typ=orddef) and
(((((torddef(fromdef).ordtype = s64bit) and
(lfrom = low(int64)) and
(hfrom = high(int64))) or
((torddef(fromdef).ordtype = u64bit) and
(lfrom = low(qword)) and
(hfrom = high(qword))) or
((torddef(fromdef).ordtype = scurrency) and
(lfrom = low(int64)) and
(hfrom = high(int64)))))) then
exit;
{$else cpu64bit}
if (fromdef = todef) and
(fromdef.typ=orddef) and
(((((torddef(fromdef).ordtype = s32bit) and
(lfrom = low(longint)) and
(hfrom = high(longint))) or
((torddef(fromdef).ordtype = u32bit) and
(lfrom = low(cardinal)) and
(hfrom = high(cardinal)))))) then
exit;
{$endif cpu64bit}
{ optimize some range checks away in safe cases }
fromsize := fromdef.size;
tosize := todef.size;
if ((from_signed = to_signed) or
(not from_signed)) and
(lto<=lfrom) and (hto>=hfrom) and
(fromsize <= tosize) then
begin
{ if fromsize < tosize, and both have the same signed-ness or }
{ fromdef is unsigned, then all bit patterns from fromdef are }
{ valid for todef as well }
if (fromsize < tosize) then
exit;
if (fromsize = tosize) and
(from_signed = to_signed) then
{ only optimize away if all bit patterns which fit in fromsize }
{ are valid for the todef }
begin
{$ifopt Q+}
{$define overflowon}
{$Q-}
{$endif}
if to_signed then
begin
{ calculation of the low/high ranges must not overflow 64 bit
otherwise we end up comparing with zero for 64 bit data types on
64 bit processors }
if (lto = (int64(-1) << (tosize * 8 - 1))) and
(hto = (-((int64(-1) << (tosize * 8 - 1))+1))) then
exit
end
else
begin
{ calculation of the low/high ranges must not overflow 64 bit
otherwise we end up having all zeros for 64 bit data types on
64 bit processors }
if (lto = 0) and
(qword(hto) = (qword(-1) >> (64-(tosize * 8))) ) then
exit
end;
{$ifdef overflowon}
{$Q+}
{$undef overflowon}
{$endif}
end
end;
{ generate the rangecheck code for the def where we are going to }
{ store the result }
{ use the trick that }
{ a <= x <= b <=> 0 <= x-a <= b-a <=> unsigned(x-a) <= unsigned(b-a) }
{ To be able to do that, we have to make sure however that either }
{ fromdef and todef are both signed or unsigned, or that we leave }
{ the parts < 0 and > maxlongint out }
if from_signed xor to_signed then
begin
if from_signed then
{ from is signed, to is unsigned }
begin
{ if high(from) < 0 -> always range error }
if (hfrom < 0) or
{ if low(to) > maxlongint also range error }
(lto > aintmax) then
begin
a_call_name(list,'FPC_RANGEERROR');
exit
end;
{ from is signed and to is unsigned -> when looking at to }
{ as an signed value, it must be < maxaint (otherwise }
{ it will become negative, which is invalid since "to" is unsigned) }
if hto > aintmax then
hto := aintmax;
end
else
{ from is unsigned, to is signed }
begin
if (lfrom > aintmax) or
(hto < 0) then
begin
a_call_name(list,'FPC_RANGEERROR');
exit
end;
{ from is unsigned and to is signed -> when looking at to }
{ as an unsigned value, it must be >= 0 (since negative }
{ values are the same as values > maxlongint) }
if lto < 0 then
lto := 0;
end;
end;
hreg:=getintregister(list,OS_INT);
a_load_loc_reg(list,OS_INT,l,hreg);
a_op_const_reg(list,OP_SUB,OS_INT,aint(lto),hreg);
current_asmdata.getjumplabel(neglabel);
{
if from_signed then
a_cmp_const_reg_label(list,OS_INT,OC_GTE,aint(hto-lto),hreg,neglabel)
else
}
{$ifdef cpu64bit}
if qword(hto-lto)>qword(aintmax) then
a_cmp_const_reg_label(list,OS_INT,OC_BE,aintmax,hreg,neglabel)
else
{$endif cpu64bit}
a_cmp_const_reg_label(list,OS_INT,OC_BE,aint(hto-lto),hreg,neglabel);
a_call_name(list,'FPC_RANGEERROR');
a_label(list,neglabel);
end;
procedure tcg.g_overflowCheck_loc(List:TAsmList;const Loc:TLocation;def:TDef;ovloc : tlocation);
begin
g_overflowCheck(list,loc,def);
end;
procedure tcg.g_flags2ref(list: TAsmList; size: TCgSize; const f: tresflags; const ref:TReference);
var
tmpreg : tregister;
begin
tmpreg:=getintregister(list,size);
g_flags2reg(list,size,f,tmpreg);
a_load_reg_ref(list,size,size,tmpreg,ref);
end;
procedure tcg.g_maybe_testself(list : TAsmList;reg:tregister);
var
OKLabel : tasmlabel;
cgpara1 : TCGPara;
begin
if (cs_check_object in current_settings.localswitches) or
(cs_check_range in current_settings.localswitches) then
begin
current_asmdata.getjumplabel(oklabel);
a_cmp_const_reg_label(list,OS_ADDR,OC_NE,0,reg,oklabel);
cgpara1.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.allocparaloc(list,cgpara1);
a_param_const(list,OS_INT,210,cgpara1);
paramanager.freeparaloc(list,cgpara1);
a_call_name(list,'FPC_HANDLEERROR');
a_label(list,oklabel);
cgpara1.done;
end;
end;
procedure tcg.g_maybe_testvmt(list : TAsmList;reg:tregister;objdef:tobjectdef);
var
hrefvmt : treference;
cgpara1,cgpara2 : TCGPara;
begin
cgpara1.init;
cgpara2.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
if (cs_check_object in current_settings.localswitches) then
begin
reference_reset_symbol(hrefvmt,current_asmdata.RefAsmSymbol(objdef.vmt_mangledname),0);
paramanager.allocparaloc(list,cgpara2);
a_paramaddr_ref(list,hrefvmt,cgpara2);
paramanager.allocparaloc(list,cgpara1);
a_param_reg(list,OS_ADDR,reg,cgpara1);
paramanager.freeparaloc(list,cgpara1);
paramanager.freeparaloc(list,cgpara2);
allocallcpuregisters(list);
a_call_name(list,'FPC_CHECK_OBJECT_EXT');
deallocallcpuregisters(list);
end
else
if (cs_check_range in current_settings.localswitches) then
begin
paramanager.allocparaloc(list,cgpara1);
a_param_reg(list,OS_ADDR,reg,cgpara1);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_CHECK_OBJECT');
deallocallcpuregisters(list);
end;
cgpara1.done;
cgpara2.done;
end;
{*****************************************************************************
Entry/Exit Code Functions
*****************************************************************************}
procedure tcg.g_copyvaluepara_openarray(list : TAsmList;const ref:treference;const lenloc:tlocation;elesize:aint;destreg:tregister);
var
sizereg,sourcereg,lenreg : tregister;
cgpara1,cgpara2,cgpara3 : TCGPara;
begin
{ because some abis don't support dynamic stack allocation properly
open array value parameters are copied onto the heap
}
{ calculate necessary memory }
{ read/write operations on one register make the life of the register allocator hard }
if not(lenloc.loc in [LOC_REGISTER,LOC_CREGISTER]) then
begin
lenreg:=getintregister(list,OS_INT);
a_load_loc_reg(list,OS_INT,lenloc,lenreg);
end
else
lenreg:=lenloc.register;
sizereg:=getintregister(list,OS_INT);
a_op_const_reg_reg(list,OP_ADD,OS_INT,1,lenreg,sizereg);
a_op_const_reg(list,OP_IMUL,OS_INT,elesize,sizereg);
{ load source }
sourcereg:=getaddressregister(list);
a_loadaddr_ref_reg(list,ref,sourcereg);
{ do getmem call }
cgpara1.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.allocparaloc(list,cgpara1);
a_param_reg(list,OS_INT,sizereg,cgpara1);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_GETMEM');
deallocallcpuregisters(list);
cgpara1.done;
{ return the new address }
a_load_reg_reg(list,OS_ADDR,OS_ADDR,NR_FUNCTION_RESULT_REG,destreg);
{ do move call }
cgpara1.init;
cgpara2.init;
cgpara3.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
paramanager.getintparaloc(pocall_default,2,cgpara2);
paramanager.getintparaloc(pocall_default,3,cgpara3);
{ load size }
paramanager.allocparaloc(list,cgpara3);
a_param_reg(list,OS_INT,sizereg,cgpara3);
{ load destination }
paramanager.allocparaloc(list,cgpara2);
a_param_reg(list,OS_ADDR,destreg,cgpara2);
{ load source }
paramanager.allocparaloc(list,cgpara1);
a_param_reg(list,OS_ADDR,sourcereg,cgpara1);
paramanager.freeparaloc(list,cgpara3);
paramanager.freeparaloc(list,cgpara2);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_MOVE');
deallocallcpuregisters(list);
cgpara3.done;
cgpara2.done;
cgpara1.done;
end;
procedure tcg.g_releasevaluepara_openarray(list : TAsmList;const l:tlocation);
var
cgpara1 : TCGPara;
begin
{ do move call }
cgpara1.init;
paramanager.getintparaloc(pocall_default,1,cgpara1);
{ load source }
paramanager.allocparaloc(list,cgpara1);
a_param_loc(list,l,cgpara1);
paramanager.freeparaloc(list,cgpara1);
allocallcpuregisters(list);
a_call_name(list,'FPC_FREEMEM');
deallocallcpuregisters(list);
cgpara1.done;
end;
procedure tcg.g_save_standard_registers(list:TAsmList);
var
href : treference;
size : longint;
r : integer;
begin
{ Get temp }
size:=0;
for r:=low(saved_standard_registers) to high(saved_standard_registers) do
if saved_standard_registers[r] in rg[R_INTREGISTER].used_in_proc then
inc(size,sizeof(aint));
if size>0 then
begin
tg.GetTemp(list,size,tt_noreuse,current_procinfo.save_regs_ref);
{ Copy registers to temp }
href:=current_procinfo.save_regs_ref;
for r:=low(saved_standard_registers) to high(saved_standard_registers) do
begin
if saved_standard_registers[r] in rg[R_INTREGISTER].used_in_proc then
begin
a_load_reg_ref(list,OS_ADDR,OS_ADDR,newreg(R_INTREGISTER,saved_standard_registers[r],R_SUBWHOLE),href);
inc(href.offset,sizeof(aint));
end;
include(rg[R_INTREGISTER].preserved_by_proc,saved_standard_registers[r]);
end;
end;
end;
procedure tcg.g_restore_standard_registers(list:TAsmList);
var
href : treference;
r : integer;
hreg : tregister;
begin
{ Copy registers from temp }
href:=current_procinfo.save_regs_ref;
for r:=low(saved_standard_registers) to high(saved_standard_registers) do
if saved_standard_registers[r] in rg[R_INTREGISTER].used_in_proc then
begin
hreg:=newreg(R_INTREGISTER,saved_standard_registers[r],R_SUBWHOLE);
{ Allocate register so the optimizer does not remove the load }
a_reg_alloc(list,hreg);
a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,hreg);
inc(href.offset,sizeof(aint));
end;
tg.UnGetTemp(list,current_procinfo.save_regs_ref);
end;
procedure tcg.g_profilecode(list : TAsmList);
begin
end;
procedure tcg.g_exception_reason_save(list : TAsmList; const href : treference);
begin
a_load_reg_ref(list, OS_INT, OS_INT, NR_FUNCTION_RESULT_REG, href);
end;
procedure tcg.g_exception_reason_save_const(list : TAsmList; const href : treference; a: aint);
begin
a_load_const_ref(list, OS_INT, a, href);
end;
procedure tcg.g_exception_reason_load(list : TAsmList; const href : treference);
begin
a_load_ref_reg(list, OS_INT, OS_INT, href, NR_FUNCTION_RESULT_REG);
end;
procedure tcg.g_adjust_self_value(list:TAsmList;procdef: tprocdef;ioffset: aint);
var
hsym : tsym;
href : treference;
paraloc : Pcgparalocation;
begin
{ calculate the parameter info for the procdef }
if not procdef.has_paraloc_info then
begin
procdef.requiredargarea:=paramanager.create_paraloc_info(procdef,callerside);
procdef.has_paraloc_info:=true;
end;
hsym:=tsym(procdef.parast.Find('self'));
if not(assigned(hsym) and
(hsym.typ=paravarsym)) then
internalerror(200305251);
paraloc:=tparavarsym(hsym).paraloc[callerside].location;
while paraloc<>nil do
with paraloc^ do
begin
case loc of
LOC_REGISTER:
cg.a_op_const_reg(list,OP_SUB,size,ioffset,register);
LOC_REFERENCE:
begin
{ offset in the wrapper needs to be adjusted for the stored
return address }
reference_reset_base(href,reference.index,reference.offset+sizeof(aint));
cg.a_op_const_ref(list,OP_SUB,size,ioffset,href);
end
else
internalerror(200309189);
end;
paraloc:=next;
end;
end;
procedure tcg.a_call_name_static(list : TAsmList;const s : string);
begin
a_call_name(list,s);
end;
function tcg.g_indirect_sym_load(list:TAsmList;const symname: string): tregister;
var
l: tasmsymbol;
ref: treference;
begin
result := NR_NO;
case target_info.system of
system_powerpc_darwin,
system_i386_darwin:
begin
l:=current_asmdata.getasmsymbol('L'+symname+'$non_lazy_ptr');
if not(assigned(l)) then
begin
l:=current_asmdata.DefineAsmSymbol('L'+symname+'$non_lazy_ptr',AB_COMMON,AT_DATA);
current_asmdata.asmlists[al_picdata].concat(tai_symbol.create(l,0));
current_asmdata.asmlists[al_picdata].concat(tai_const.create_indirect_sym(current_asmdata.RefAsmSymbol(symname)));
current_asmdata.asmlists[al_picdata].concat(tai_const.create_32bit(0));
end;
result := cg.getaddressregister(list);
reference_reset_symbol(ref,l,0);
{ ref.base:=current_procinfo.got;
ref.relsymbol:=current_procinfo.CurrGOTLabel;}
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,ref,result);
end;
end;
end;
{*****************************************************************************
TCG64
*****************************************************************************}
{$ifndef cpu64bit}
procedure tcg64.a_op64_const_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;value : int64; regsrc,regdst : tregister64);
begin
a_load64_reg_reg(list,regsrc,regdst);
a_op64_const_reg(list,op,size,value,regdst);
end;
procedure tcg64.a_op64_reg_reg_reg(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64);
var
tmpreg64 : tregister64;
begin
{ when src1=dst then we need to first create a temp to prevent
overwriting src1 with src2 }
if (regsrc1.reghi=regdst.reghi) or
(regsrc1.reglo=regdst.reghi) or
(regsrc1.reghi=regdst.reglo) or
(regsrc1.reglo=regdst.reglo) then
begin
tmpreg64.reglo:=cg.getintregister(list,OS_32);
tmpreg64.reghi:=cg.getintregister(list,OS_32);
a_load64_reg_reg(list,regsrc2,tmpreg64);
a_op64_reg_reg(list,op,size,regsrc1,tmpreg64);
a_load64_reg_reg(list,tmpreg64,regdst);
end
else
begin
a_load64_reg_reg(list,regsrc2,regdst);
a_op64_reg_reg(list,op,size,regsrc1,regdst);
end;
end;
procedure tcg64.a_op64_const_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; a : int64; const sref: tsubsetreference);
var
tmpreg64 : tregister64;
begin
tmpreg64.reglo:=cg.getintregister(list,OS_32);
tmpreg64.reghi:=cg.getintregister(list,OS_32);
a_load64_subsetref_reg(list,sref,tmpreg64);
a_op64_const_reg(list,op,size,a,tmpreg64);
a_load64_reg_subsetref(list,tmpreg64,sref);
end;
procedure tcg64.a_op64_reg_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; reg: tregister64; const sref: tsubsetreference);
var
tmpreg64 : tregister64;
begin
tmpreg64.reglo:=cg.getintregister(list,OS_32);
tmpreg64.reghi:=cg.getintregister(list,OS_32);
a_load64_subsetref_reg(list,sref,tmpreg64);
a_op64_reg_reg(list,op,size,reg,tmpreg64);
a_load64_reg_subsetref(list,tmpreg64,sref);
end;
procedure tcg64.a_op64_ref_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; const ref: treference; const sref: tsubsetreference);
var
tmpreg64 : tregister64;
begin
tmpreg64.reglo:=cg.getintregister(list,OS_32);
tmpreg64.reghi:=cg.getintregister(list,OS_32);
a_load64_subsetref_reg(list,sref,tmpreg64);
a_op64_ref_reg(list,op,size,ref,tmpreg64);
a_load64_reg_subsetref(list,tmpreg64,sref);
end;
procedure tcg64.a_op64_subsetref_subsetref(list : TAsmList; Op : TOpCG; size : TCGSize; const ssref,dsref: tsubsetreference);
var
tmpreg64 : tregister64;
begin
tmpreg64.reglo:=cg.getintregister(list,OS_32);
tmpreg64.reghi:=cg.getintregister(list,OS_32);
a_load64_subsetref_reg(list,ssref,tmpreg64);
a_op64_reg_subsetref(list,op,size,tmpreg64,dsref);
end;
procedure tcg64.a_op64_const_reg_reg_checkoverflow(list: TAsmList;op:TOpCG;size : tcgsize;value : int64;regsrc,regdst : tregister64;setflags : boolean;var ovloc : tlocation);
begin
a_op64_const_reg_reg(list,op,size,value,regsrc,regdst);
ovloc.loc:=LOC_VOID;
end;
procedure tcg64.a_op64_reg_reg_reg_checkoverflow(list: TAsmList;op:TOpCG;size : tcgsize;regsrc1,regsrc2,regdst : tregister64;setflags : boolean;var ovloc : tlocation);
begin
a_op64_reg_reg_reg(list,op,size,regsrc1,regsrc2,regdst);
ovloc.loc:=LOC_VOID;
end;
procedure tcg64.a_load64_loc_subsetref(list : TAsmList;const l: tlocation; const sref : tsubsetreference);
begin
case l.loc of
LOC_REFERENCE, LOC_CREFERENCE:
a_load64_ref_subsetref(list,l.reference,sref);
LOC_REGISTER,LOC_CREGISTER:
a_load64_reg_subsetref(list,l.register64,sref);
LOC_CONSTANT :
a_load64_const_subsetref(list,l.value64,sref);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load64_subsetref_subsetref(list,l.sref,sref);
else
internalerror(2006082210);
end;
end;
procedure tcg64.a_load64_subsetref_loc(list: TAsmlist; const sref: tsubsetreference; const l: tlocation);
begin
case l.loc of
LOC_REFERENCE, LOC_CREFERENCE:
a_load64_subsetref_ref(list,sref,l.reference);
LOC_REGISTER,LOC_CREGISTER:
a_load64_subsetref_reg(list,sref,l.register64);
LOC_SUBSETREF,LOC_CSUBSETREF:
a_load64_subsetref_subsetref(list,sref,l.sref);
else
internalerror(2006082211);
end;
end;
{$endif cpu64bit}
initialization
;
finalization
cg.free;
{$ifndef cpu64bit}
cg64.free;
{$endif cpu64bit}
end.
syntax highlighted by Code2HTML, v. 0.9.1