{
Copyright (c) 1998-2002 by Florian Klaempfl
Generate assembler for call nodes
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.
****************************************************************************
}
unit ncgcal;
{$i fpcdefs.inc}
interface
uses
cpubase,
globtype,
parabase,cgutils,
symdef,node,ncal;
type
tcgcallparanode = class(tcallparanode)
private
tempcgpara : tcgpara;
procedure push_addr_para;
procedure push_value_para;
public
constructor create(expr,next : tnode);override;
destructor destroy;override;
procedure secondcallparan;override;
end;
tcgcallnode = class(tcallnode)
private
procedure release_para_temps;
procedure pushparas;
procedure freeparas;
protected
framepointer_paraloc : tcgpara;
refcountedtemp : treference;
procedure handle_return_value;
{# This routine is used to push the current frame pointer
on the stack. This is used in nested routines where the
value of the frame pointer is always pushed as an extra
parameter.
The default handling is the standard handling used on
most stack based machines, where the frame pointer is
the first invisible parameter.
}
procedure pop_parasize(pop_size:longint);virtual;
procedure extra_interrupt_code;virtual;
procedure extra_call_code;virtual;
procedure extra_post_call_code;virtual;
procedure do_syscall;virtual;abstract;
public
procedure pass_generate_code;override;
end;
implementation
uses
systems,
cutils,verbose,globals,
cpuinfo,
symconst,symtable,defutil,paramgr,
cgbase,pass_2,
aasmbase,aasmtai,aasmdata,
nbas,nmem,nld,ncnv,nutils,
{$ifdef x86}
cga,cgx86,aasmcpu,
{$endif x86}
ncgutil,
cgobj,tgobj,
procinfo;
{*****************************************************************************
TCGCALLPARANODE
*****************************************************************************}
constructor tcgcallparanode.create(expr,next : tnode);
begin
inherited create(expr,next);
tempcgpara.init;
end;
destructor tcgcallparanode.destroy;
begin
tempcgpara.done;
inherited destroy;
end;
procedure tcgcallparanode.push_addr_para;
begin
if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
internalerror(200304235);
cg.a_paramaddr_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
end;
procedure tcgcallparanode.push_value_para;
{$ifdef i386}
var
href : treference;
size : longint;
{$endif i386}
begin
{ we've nothing to push when the size of the parameter is 0 }
if left.resultdef.size=0 then
exit;
{ Move flags and jump in register to make it less complex }
if left.location.loc in [LOC_FLAGS,LOC_JUMP,LOC_SUBSETREG,LOC_CSUBSETREG,LOC_SUBSETREF,LOC_CSUBSETREF] then
location_force_reg(current_asmdata.CurrAsmList,left.location,def_cgsize(left.resultdef),false);
{ Handle Floating point types differently
This doesn't depend on emulator settings, emulator settings should
be handled by cpupara }
if left.resultdef.typ=floatdef then
begin
{$ifdef i386}
if tempcgpara.location^.loc<>LOC_REFERENCE then
internalerror(200309291);
case left.location.loc of
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
begin
size:=align(TCGSize2Size[left.location.size],tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
cg.g_stackpointer_alloc(current_asmdata.CurrAsmList,size);
reference_reset_base(href,NR_STACK_POINTER_REG,0);
end
else
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,left.location.size,left.location.size,left.location.register,href);
end;
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
size:=align(tfloatdef(left.resultdef).size,tempcgpara.alignment);
if tempcgpara.location^.reference.index=NR_STACK_POINTER_REG then
begin
cg.g_stackpointer_alloc(current_asmdata.CurrAsmList,size);
reference_reset_base(href,NR_STACK_POINTER_REG,0);
end
else
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,left.location.size,left.location.size,left.location.register,href,mms_movescalar);
end;
LOC_REFERENCE,
LOC_CREFERENCE :
begin
size:=align(left.resultdef.size,tempcgpara.alignment);
if (not use_fixed_stack) and
(tempcgpara.location^.reference.index=NR_STACK_POINTER_REG) then
cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
else
begin
reference_reset_base(href,tempcgpara.location^.reference.index,tempcgpara.location^.reference.offset);
cg.g_concatcopy(current_asmdata.CurrAsmList,left.location.reference,href,size);
end;
end;
else
internalerror(2002042430);
end;
{$else i386}
case left.location.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
case tempcgpara.location^.loc of
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_MMREGISTER,
LOC_CMMREGISTER:
cg.a_parammm_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara,mms_movescalar);
{$ifdef x86_64}
LOC_REGISTER,
LOC_CREGISTER :
begin
current_asmdata.CurrAsmList.concat(taicpu.op_reg_reg(A_MOVD,S_NO,left.location.register,tempcgpara.location^.register));
end;
{$endif x86_64}
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
begin
location_force_fpureg(current_asmdata.CurrAsmList,left.location,false);
cg.a_paramfpu_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara);
end;
else
internalerror(200204249);
end;
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
case tempcgpara.location^.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
begin
location_force_mmregscalar(current_asmdata.CurrAsmList,left.location,false);
cg.a_parammm_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara,mms_movescalar);
end;
{$ifdef cpu64bit}
LOC_REGISTER,
LOC_CREGISTER :
begin
location_force_mem(current_asmdata.CurrAsmList,left.location);
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
end;
{$endif cpu64bit}
{$ifdef powerpc}
LOC_REGISTER,
LOC_CREGISTER :
begin
{ aix abi passes floats of varargs in both fpu and }
{ integer registers }
location_force_mem(current_asmdata.CurrAsmList,left.location);
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
if (left.location.size in [OS_32,OS_S32]) then
cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
else
cg64.a_param64_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
end;
{$endif powerpc}
{$if defined(sparc) or defined(arm) or defined(m68k)}
{ sparc and arm pass floats in normal registers }
LOC_REGISTER,
LOC_CREGISTER,
{$endif sparc}
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
cg.a_paramfpu_reg(current_asmdata.CurrAsmList,left.location.size,left.location.register,tempcgpara);
else
internalerror(2002042433);
end;
LOC_REFERENCE,
LOC_CREFERENCE:
case tempcgpara.location^.loc of
LOC_MMREGISTER,
LOC_CMMREGISTER:
cg.a_parammm_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara,mms_movescalar);
{$ifdef cpu64bit}
LOC_REGISTER,
LOC_CREGISTER :
begin
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
end;
{$endif cpu64bit}
{$ifdef powerpc}
{ x86_64 pushes s64comp in normal register }
LOC_REGISTER,
LOC_CREGISTER :
begin
{ force integer size }
left.location.size:=int_cgsize(tcgsize2size[left.location.size]);
if (left.location.size in [OS_32,OS_S32]) then
cg.a_param_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara)
else
cg64.a_param64_ref(current_asmdata.CurrAsmList,left.location.reference,tempcgpara);
end;
{$endif powerpc}
{$if defined(sparc) or defined(arm) or defined(m68k)}
{ sparc and arm pass floats in normal registers }
LOC_REGISTER,
LOC_CREGISTER,
{$endif}
LOC_REFERENCE,
LOC_CREFERENCE,
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
cg.a_paramfpu_ref(current_asmdata.CurrAsmList,left.location.size,left.location.reference,tempcgpara);
else
internalerror(2002042431);
end;
LOC_REGISTER,
LOC_CREGISTER :
begin
{$ifndef cpu64bit}
{ use cg64 only for int64, not for 8 byte records }
if is_64bit(left.resultdef) then
cg64.a_param64_loc(current_asmdata.CurrAsmList,left.location,tempcgpara)
else
{$endif cpu64bit}
begin
{$ifndef cpu64bit}
{ Only a_param_ref supports multiple locations, when the
value is still a const or in a register then write it
to a reference first. This situation can be triggered
by typecasting an int64 constant to a record of 8 bytes }
if left.location.size in [OS_64,OS_S64] then
location_force_mem(current_asmdata.CurrAsmList,left.location);
{$endif cpu64bit}
cg.a_param_loc(current_asmdata.CurrAsmList,left.location,tempcgpara);
end;
end;
else
internalerror(2002042432);
end;
{$endif i386}
end
else
begin
case left.location.loc of
LOC_CONSTANT,
LOC_REGISTER,
LOC_CREGISTER,
LOC_REFERENCE,
LOC_CREFERENCE :
begin
{$ifndef cpu64bit}
{ use cg64 only for int64, not for 8 byte records }
if is_64bit(left.resultdef) then
cg64.a_param64_loc(current_asmdata.CurrAsmList,left.location,tempcgpara)
else
{$endif cpu64bit}
begin
{$ifndef cpu64bit}
{ Only a_param_ref supports multiple locations, when the
value is still a const or in a register then write it
to a reference first. This situation can be triggered
by typecasting an int64 constant to a record of 8 bytes }
if left.location.size in [OS_64,OS_S64] then
location_force_mem(current_asmdata.CurrAsmList,left.location);
{$endif cpu64bit}
cg.a_param_loc(current_asmdata.CurrAsmList,left.location,tempcgpara);
end;
end;
{$ifdef SUPPORT_MMX}
LOC_MMXREGISTER,
LOC_CMMXREGISTER:
cg.a_parammm_reg(current_asmdata.CurrAsmList,OS_M64,left.location.register,tempcgpara,nil);
{$endif SUPPORT_MMX}
else
internalerror(200204241);
end;
end;
end;
procedure tcgcallparanode.secondcallparan;
var
href : treference;
otlabel,
oflabel : tasmlabel;
begin
if not(assigned(parasym)) then
internalerror(200304242);
{ Skip nothingn nodes which are used after disabling
a parameter }
if (left.nodetype<>nothingn) then
begin
otlabel:=current_procinfo.CurrTrueLabel;
oflabel:=current_procinfo.CurrFalseLabel;
current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
secondpass(left);
maybechangeloadnodereg(current_asmdata.CurrAsmList,left,true);
{ release memory for refcnt out parameters }
if (parasym.varspez=vs_out) and
(left.resultdef.needs_inittable) then
begin
location_get_data_ref(current_asmdata.CurrAsmList,left.location,href,false);
cg.g_decrrefcount(current_asmdata.CurrAsmList,left.resultdef,href);
end;
paramanager.createtempparaloc(current_asmdata.CurrAsmList,aktcallnode.procdefinition.proccalloption,parasym,tempcgpara);
{ handle varargs first, because parasym is not valid }
if (cpf_varargs_para in callparaflags) then
begin
if paramanager.push_addr_param(vs_value,left.resultdef,
aktcallnode.procdefinition.proccalloption) then
push_addr_para
else
push_value_para;
end
{ hidden parameters }
else if (vo_is_hidden_para in parasym.varoptions) then
begin
{ don't push a node that already generated a pointer type
by address for implicit hidden parameters }
if (vo_is_funcret in parasym.varoptions) or
(not(left.resultdef.typ in [pointerdef,classrefdef]) and
paramanager.push_addr_param(parasym.varspez,parasym.vardef,
aktcallnode.procdefinition.proccalloption)) then
push_addr_para
else
push_value_para;
end
{ formal def }
else if (parasym.vardef.typ=formaldef) then
begin
{ allow passing of a constant to a const formaldef }
if (parasym.varspez=vs_const) and
(left.location.loc in [LOC_CONSTANT,LOC_REGISTER]) then
location_force_mem(current_asmdata.CurrAsmList,left.location);
push_addr_para;
end
{ Normal parameter }
else
begin
{ don't push a node that already generated a pointer type
by address for implicit hidden parameters }
if (not(
(vo_is_hidden_para in parasym.varoptions) and
(left.resultdef.typ in [pointerdef,classrefdef])
) and
paramanager.push_addr_param(parasym.varspez,parasym.vardef,
aktcallnode.procdefinition.proccalloption)) and
{ dyn. arrays passed to an array of const must be passed by value, see tests/webtbs/tw4219.pp }
not(
is_array_of_const(parasym.vardef) and
is_dynamic_array(left.resultdef)
) then
begin
{ Passing a var parameter to a var parameter, we can
just push the address transparently }
if (left.nodetype=loadn) and
(tloadnode(left).is_addr_param_load) then
begin
if (left.location.reference.index<>NR_NO) or
(left.location.reference.offset<>0) then
internalerror(200410107);
cg.a_param_reg(current_asmdata.CurrAsmList,OS_ADDR,left.location.reference.base,tempcgpara)
end
else
begin
{ Force to be in memory }
if not(left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE]) then
location_force_mem(current_asmdata.CurrAsmList,left.location);
push_addr_para;
end;
end
else
push_value_para;
end;
current_procinfo.CurrTrueLabel:=otlabel;
current_procinfo.CurrFalseLabel:=oflabel;
{ update return location in callnode when this is the function
result }
if assigned(parasym) and
(vo_is_funcret in parasym.varoptions) then
location_copy(aktcallnode.location,left.location);
end;
{ next parameter }
if assigned(right) then
tcallparanode(right).secondcallparan;
end;
{*****************************************************************************
TCGCALLNODE
*****************************************************************************}
procedure tcgcallnode.extra_interrupt_code;
begin
end;
procedure tcgcallnode.extra_call_code;
begin
end;
procedure tcgcallnode.extra_post_call_code;
begin
end;
procedure tcgcallnode.pop_parasize(pop_size:longint);
begin
end;
procedure tcgcallnode.handle_return_value;
var
cgsize : tcgsize;
retloc : tlocation;
hregister : tregister;
tempnode : tnode;
begin
cgsize:=procdefinition.funcretloc[callerside].size;
{ structured results are easy to handle....
needed also when result_no_used !! }
if (procdefinition.proctypeoption<>potype_constructor) and
paramanager.ret_in_param(resultdef,procdefinition.proccalloption) then
begin
{ Location should be setup by the funcret para }
if location.loc<>LOC_REFERENCE then
internalerror(200304241);
end
else
{ ansi/widestrings must be registered, so we can dispose them }
if resultdef.needs_inittable then
begin
if procdefinition.funcretloc[callerside].loc<>LOC_REGISTER then
internalerror(200409261);
retloc:=procdefinition.funcretloc[callerside];
{$ifndef cpu64bit}
if cgsize in [OS_64,OS_S64] then
begin
{ the function result registers are already allocated }
if getsupreg(retloc.register64.reglo)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reglo);
retloc.register64.reglo:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,procdefinition.funcretloc[callerside].register64.reglo,retloc.register64.reglo);
if getsupreg(retloc.register64.reghi)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reghi);
retloc.register64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,procdefinition.funcretloc[callerside].register64.reghi,retloc.register64.reghi);
end
else
{$endif cpu64bit}
begin
{ the FUNCTION_RESULT_REG is already allocated }
if getsupreg(retloc.register)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register);
{ reg_ref could generate two instrcutions and allocate a register so we've to
save the result first before releasing it }
retloc.register:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,procdefinition.funcretloc[callerside].register,retloc.register);
end;
if not assigned(funcretnode) then
begin
location_reset(location,LOC_REFERENCE,cgsize);
location.reference:=refcountedtemp;
end
else
begin
{ in case of a regular funcretnode with ret_in_param, the }
{ original funcretnode isn't touched -> make sure it's }
{ the same here (not sure if it's necessary) }
tempnode := funcretnode.getcopy;
tempnode.pass_generate_code;
location := tempnode.location;
tempnode.free;
cg.g_decrrefcount(current_asmdata.CurrAsmList,resultdef,location.reference);
end;
{$ifndef cpu64bit}
if cgsize in [OS_64,OS_S64] then
cg64.a_load64_reg_ref(current_asmdata.CurrAsmList,retloc.register64,location.reference)
else
{$endif}
cg.a_load_reg_ref(current_asmdata.CurrAsmList,cgsize,cgsize,retloc.register,location.reference);
end
else
{ normal (ordinal,float,pointer) result value }
begin
{ we have only to handle the result if it is used }
if (cnf_return_value_used in callnodeflags) then
begin
location.loc:=procdefinition.funcretloc[callerside].loc;
case procdefinition.funcretloc[callerside].loc of
LOC_FPUREGISTER:
begin
location_reset(location,LOC_FPUREGISTER,cgsize);
location.register:=procdefinition.funcretloc[callerside].register;
{$ifdef x86}
tcgx86(cg).inc_fpu_stack;
{$else x86}
if getsupreg(procdefinition.funcretloc[callerside].register)<first_fpu_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
hregister:=cg.getfpuregister(current_asmdata.CurrAsmList,location.size);
cg.a_loadfpu_reg_reg(current_asmdata.CurrAsmList,location.size,location.size,location.register,hregister);
location.register:=hregister;
{$endif x86}
end;
LOC_REGISTER:
begin
if cgsize<>OS_NO then
begin
location_reset(location,LOC_REGISTER,cgsize);
{$ifndef cpu64bit}
if cgsize in [OS_64,OS_S64] then
begin
retloc:=procdefinition.funcretloc[callerside];
if retloc.loc<>LOC_REGISTER then
internalerror(200409141);
{ the function result registers are already allocated }
if getsupreg(retloc.register64.reglo)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reglo);
location.register64.reglo:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,retloc.register64.reglo,location.register64.reglo);
if getsupreg(retloc.register64.reghi)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,retloc.register64.reghi);
location.register64.reghi:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,retloc.register64.reghi,location.register64.reghi);
end
else
{$endif cpu64bit}
begin
{ change register size after the unget because the
getregister was done for the full register
def_cgsize(resultdef) is used here because
it could be a constructor call }
if getsupreg(procdefinition.funcretloc[callerside].register)<first_int_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
location.register:=cg.getintregister(current_asmdata.CurrAsmList,def_cgsize(resultdef));
cg.a_load_reg_reg(current_asmdata.CurrAsmList,cgsize,def_cgsize(resultdef),procdefinition.funcretloc[callerside].register,location.register);
end;
{$ifdef arm}
if (resultdef.typ=floatdef) and (current_settings.fputype in [fpu_fpa,fpu_fpa10,fpu_fpa11]) then
begin
location_force_mem(current_asmdata.CurrAsmList,location);
end;
{$endif arm}
end
else
begin
if resultdef.size>0 then
internalerror(200305131);
end;
end;
LOC_MMREGISTER:
begin
location_reset(location,LOC_MMREGISTER,cgsize);
if getsupreg(procdefinition.funcretloc[callerside].register)<first_mm_imreg then
cg.ungetcpuregister(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside].register);
location.register:=cg.getmmregister(current_asmdata.CurrAsmList,cgsize);
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,cgsize,cgsize,procdefinition.funcretloc[callerside].register,location.register,mms_movescalar);
end;
else
internalerror(200405023);
end;
end
else
begin
{$ifdef x86}
{ release FPU stack }
if procdefinition.funcretloc[callerside].loc=LOC_FPUREGISTER then
emit_reg(A_FSTP,S_NO,NR_FPU_RESULT_REG);
{$endif x86}
if cgsize<>OS_NO then
location_free(current_asmdata.CurrAsmList,procdefinition.funcretloc[callerside]);
location_reset(location,LOC_VOID,OS_NO);
end;
end;
{ When the result is not used we need to finalize the result and
can release the temp }
if not(cnf_return_value_used in callnodeflags) then
begin
if location.loc=LOC_REFERENCE then
begin
if resultdef.needs_inittable then
cg.g_finalize(current_asmdata.CurrAsmList,resultdef,location.reference);
tg.ungetiftemp(current_asmdata.CurrAsmList,location.reference)
end;
end;
end;
procedure tcgcallnode.release_para_temps;
var
hp : tnode;
ppn : tcallparanode;
begin
{ Release temps from parameters }
ppn:=tcallparanode(left);
while assigned(ppn) do
begin
if assigned(ppn.left) then
begin
{ don't release the funcret temp }
if not(assigned(ppn.parasym)) or
not(vo_is_funcret in ppn.parasym.varoptions) then
location_freetemp(current_asmdata.CurrAsmList,ppn.left.location);
{ process also all nodes of an array of const }
hp:=ppn.left;
while (hp.nodetype=typeconvn) do
hp:=ttypeconvnode(hp).left;
if (hp.nodetype=arrayconstructorn) and
assigned(tarrayconstructornode(hp).left) then
begin
while assigned(hp) do
begin
location_freetemp(current_asmdata.CurrAsmList,tarrayconstructornode(hp).left.location);
hp:=tarrayconstructornode(hp).right;
end;
end;
end;
ppn:=tcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.pushparas;
var
ppn : tcgcallparanode;
callerparaloc,
tmpparaloc : pcgparalocation;
sizeleft: aint;
htempref,
href : treference;
begin
{ copy all resources to the allocated registers }
ppn:=tcgcallparanode(left);
while assigned(ppn) do
begin
if (ppn.left.nodetype<>nothingn) then
begin
{ better check for the real location of the parameter here, when stack passed parameters
are saved temporary in registers, checking for the tmpparaloc.loc is wrong
}
paramanager.freeparaloc(current_asmdata.CurrAsmList,ppn.tempcgpara);
tmpparaloc:=ppn.tempcgpara.location;
sizeleft:=ppn.tempcgpara.intsize;
callerparaloc:=ppn.parasym.paraloc[callerside].location;
while assigned(callerparaloc) do
begin
{ Every paraloc must have a matching tmpparaloc }
if not assigned(tmpparaloc) then
internalerror(200408224);
if callerparaloc^.size<>tmpparaloc^.size then
internalerror(200408225);
case callerparaloc^.loc of
LOC_REGISTER:
begin
if tmpparaloc^.loc<>LOC_REGISTER then
internalerror(200408221);
if getsupreg(callerparaloc^.register)<first_int_imreg then
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,
tmpparaloc^.register,callerparaloc^.register);
end;
LOC_FPUREGISTER:
begin
if tmpparaloc^.loc<>LOC_FPUREGISTER then
internalerror(200408222);
if getsupreg(callerparaloc^.register)<first_fpu_imreg then
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
cg.a_loadfpu_reg_reg(current_asmdata.CurrAsmList,tmpparaloc^.size,ppn.tempcgpara.size,tmpparaloc^.register,callerparaloc^.register);
end;
LOC_MMREGISTER:
begin
if tmpparaloc^.loc<>LOC_MMREGISTER then
internalerror(200408223);
if getsupreg(callerparaloc^.register)<first_mm_imreg then
cg.getcpuregister(current_asmdata.CurrAsmList,callerparaloc^.register);
cg.a_loadmm_reg_reg(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,
tmpparaloc^.register,callerparaloc^.register,mms_movescalar);
end;
LOC_REFERENCE:
begin
if use_fixed_stack then
begin
{ Can't have a data copied to the stack, every location
must contain a valid size field }
if (ppn.tempcgpara.size=OS_NO) and
((tmpparaloc^.loc<>LOC_REFERENCE) or
assigned(tmpparaloc^.next)) then
internalerror(200501281);
reference_reset_base(href,callerparaloc^.reference.index,callerparaloc^.reference.offset);
{ copy parameters in case they were moved to a temp. location because we've a fixed stack }
case tmpparaloc^.loc of
LOC_REFERENCE:
begin
reference_reset_base(htempref,tmpparaloc^.reference.index,tmpparaloc^.reference.offset);
{ use concatcopy, because it can also be a float which fails when
load_ref_ref is used }
if (ppn.tempcgpara.size <> OS_NO) then
cg.g_concatcopy(current_asmdata.CurrAsmList,htempref,href,tcgsize2size[tmpparaloc^.size])
else
cg.g_concatcopy(current_asmdata.CurrAsmList,htempref,href,sizeleft)
end;
LOC_REGISTER:
cg.a_load_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href);
LOC_FPUREGISTER:
cg.a_loadfpu_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href);
LOC_MMREGISTER:
cg.a_loadmm_reg_ref(current_asmdata.CurrAsmList,tmpparaloc^.size,tmpparaloc^.size,tmpparaloc^.register,href,mms_movescalar);
else
internalerror(200402081);
end;
end;
end;
end;
dec(sizeleft,tcgsize2size[tmpparaloc^.size]);
callerparaloc:=callerparaloc^.next;
tmpparaloc:=tmpparaloc^.next;
end;
end;
ppn:=tcgcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.freeparas;
var
ppn : tcgcallparanode;
begin
{ free the resources allocated for the parameters }
ppn:=tcgcallparanode(left);
while assigned(ppn) do
begin
if (ppn.left.nodetype<>nothingn) then
begin
if (ppn.parasym.paraloc[callerside].location^.loc <> LOC_REFERENCE) then
paramanager.freeparaloc(current_asmdata.CurrAsmList,ppn.parasym.paraloc[callerside]);
end;
ppn:=tcgcallparanode(ppn.right);
end;
end;
procedure tcgcallnode.pass_generate_code;
var
regs_to_save_int,
regs_to_save_fpu,
regs_to_save_mm : Tcpuregisterset;
href : treference;
pop_size : longint;
vmtoffset : aint;
pvreg,
vmtreg : tregister;
oldaktcallnode : tcallnode;
{$ifdef vtentry}
sym : tasmsymbol;
{$endif vtentry}
begin
if not assigned(procdefinition) or
not procdefinition.has_paraloc_info then
internalerror(200305264);
if assigned(methodpointerinit) then
secondpass(methodpointerinit);
if resultdef.needs_inittable and
not paramanager.ret_in_param(resultdef,procdefinition.proccalloption) and
not assigned(funcretnode) then
begin
tg.gettemptyped(current_asmdata.CurrAsmList,resultdef,tt_normal,refcountedtemp);
{ finalize instead of only decrref, because if the called }
{ function throws an exception this temp will be decrref'd }
{ again (tw7100) }
cg.g_finalize(current_asmdata.CurrAsmList,resultdef,refcountedtemp);
end;
regs_to_save_int:=paramanager.get_volatile_registers_int(procdefinition.proccalloption);
regs_to_save_fpu:=paramanager.get_volatile_registers_fpu(procdefinition.proccalloption);
regs_to_save_mm:=paramanager.get_volatile_registers_mm(procdefinition.proccalloption);
{ Include Function result registers }
if (not is_void(resultdef)) then
begin
case procdefinition.funcretloc[callerside].loc of
LOC_REGISTER,
LOC_CREGISTER:
include(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register));
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
include(regs_to_save_fpu,getsupreg(procdefinition.funcretloc[callerside].register));
LOC_MMREGISTER,
LOC_CMMREGISTER:
include(regs_to_save_mm,getsupreg(procdefinition.funcretloc[callerside].register));
LOC_REFERENCE,
LOC_VOID:
;
else
internalerror(2004110213);
end;
end;
{ Process parameters, register parameters will be loaded
in imaginary registers. The actual load to the correct
register is done just before the call }
oldaktcallnode:=aktcallnode;
aktcallnode:=self;
if assigned(left) then
tcallparanode(left).secondcallparan;
aktcallnode:=oldaktcallnode;
{ procedure variable or normal function call ? }
if (right=nil) then
begin
{ When methodpointer is typen we don't need (and can't) load
a pointer. We can directly call the correct procdef (PFV) }
if (po_virtualmethod in procdefinition.procoptions) and
assigned(methodpointer) and
(methodpointer.nodetype<>typen) then
begin
{ virtual methods require an index }
if tprocdef(procdefinition).extnumber=$ffff then
internalerror(200304021);
secondpass(methodpointer);
{ Load VMT from self }
if methodpointer.resultdef.typ=objectdef then
gen_load_vmt_register(current_asmdata.CurrAsmList,tobjectdef(methodpointer.resultdef),methodpointer.location,vmtreg)
else
begin
{ Load VMT value in register }
location_force_reg(current_asmdata.CurrAsmList,methodpointer.location,OS_ADDR,false);
vmtreg:=methodpointer.location.register;
end;
{ test validity of VMT }
if not(is_interface(tprocdef(procdefinition)._class)) and
not(is_cppclass(tprocdef(procdefinition)._class)) then
cg.g_maybe_testvmt(current_asmdata.CurrAsmList,vmtreg,tprocdef(procdefinition)._class);
{ Call through VMT, generate a VTREF symbol to notify the linker }
vmtoffset:=tprocdef(procdefinition)._class.vmtmethodoffset(tprocdef(procdefinition).extnumber);
{$ifdef vtentry}
if not is_interface(tprocdef(procdefinition)._class) then
begin
inc(current_asmdata.NextVTEntryNr);
current_asmdata.CurrAsmList.Concat(tai_symbol.CreateName('VTREF'+tostr(current_asmdata.NextVTEntryNr)+'_'+tprocdef(procdefinition)._class.vmt_mangledname+'$$'+tostr(vmtoffset div sizeof(aint)),AT_FUNCTION,0));
end;
{$endif vtentry}
{$ifndef x86}
pvreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_ADDR);
{$endif not x86}
reference_reset_base(href,vmtreg,vmtoffset);
{$ifndef x86}
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,href,pvreg);
{$endif not x86}
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
{ call method }
extra_call_code;
{$ifdef x86}
cg.a_call_ref(current_asmdata.CurrAsmList,href);
{$else x86}
cg.a_call_reg(current_asmdata.CurrAsmList,pvreg);
{$endif x86}
extra_post_call_code;
end
else
begin
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
if procdefinition.proccalloption=pocall_syscall then
do_syscall
else
begin
{ Calling interrupt from the same code requires some
extra code }
if (po_interrupt in procdefinition.procoptions) then
extra_interrupt_code;
extra_call_code;
cg.a_call_name(current_asmdata.CurrAsmList,tprocdef(procdefinition).mangledname);
extra_post_call_code;
end;
end;
end
else
{ now procedure variable case }
begin
secondpass(right);
pvreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_ADDR);
{ Only load OS_ADDR from the reference }
if right.location.loc in [LOC_REFERENCE,LOC_CREFERENCE] then
cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,right.location.reference,pvreg)
else
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_ADDR,right.location,pvreg);
location_freetemp(current_asmdata.CurrAsmList,right.location);
{ Load parameters that are in temporary registers in the
correct parameter register }
if assigned(left) then
begin
pushparas;
{ free the resources allocated for the parameters }
freeparas;
end;
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
if cg.uses_registers(R_FPUREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
if cg.uses_registers(R_MMREGISTER) then
cg.alloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
{ Calling interrupt from the same code requires some
extra code }
if (po_interrupt in procdefinition.procoptions) then
extra_interrupt_code;
extra_call_code;
cg.a_call_reg(current_asmdata.CurrAsmList,pvreg);
extra_post_call_code;
end;
{ Need to remove the parameters from the stack? }
if (procdefinition.proccalloption in clearstack_pocalls) then
begin
pop_size:=pushedparasize;
{ for Cdecl functions we don't need to pop the funcret when it
was pushed by para }
if paramanager.ret_in_param(procdefinition.returndef,procdefinition.proccalloption) then
dec(pop_size,sizeof(aint));
{ Remove parameters/alignment from the stack }
pop_parasize(pop_size);
end;
{ Release registers, but not the registers that contain the
function result }
if (not is_void(resultdef)) then
begin
case procdefinition.funcretloc[callerside].loc of
LOC_REGISTER,
LOC_CREGISTER:
begin
{$ifndef cpu64bit}
if procdefinition.funcretloc[callerside].size in [OS_64,OS_S64] then
begin
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register64.reghi));
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register64.reglo));
end
else
{$endif cpu64bit}
exclude(regs_to_save_int,getsupreg(procdefinition.funcretloc[callerside].register));
end;
LOC_FPUREGISTER,
LOC_CFPUREGISTER:
exclude(regs_to_save_fpu,getsupreg(procdefinition.funcretloc[callerside].register));
LOC_MMREGISTER,
LOC_CMMREGISTER:
exclude(regs_to_save_mm,getsupreg(procdefinition.funcretloc[callerside].register));
LOC_REFERENCE,
LOC_VOID:
;
else
internalerror(2004110214);
end;
end;
{$if defined(x86) or defined(arm)}
if procdefinition.proccalloption=pocall_safecall then
begin
{$ifdef x86_64}
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_RAX,NR_RCX);
{$endif x86_64}
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_SAFECALLCHECK');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
{$endif}
if cg.uses_registers(R_MMREGISTER) then
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_MMREGISTER,regs_to_save_mm);
if cg.uses_registers(R_FPUREGISTER) then
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_FPUREGISTER,regs_to_save_fpu);
cg.dealloccpuregisters(current_asmdata.CurrAsmList,R_INTREGISTER,regs_to_save_int);
{ handle function results }
if (not is_void(resultdef)) then
handle_return_value
else
location_reset(location,LOC_VOID,OS_NO);
{ perhaps i/o check ? }
if (cs_check_io in current_settings.localswitches) and
(po_iocheck in procdefinition.procoptions) and
not(po_iocheck in current_procinfo.procdef.procoptions) and
{ no IO check for methods and procedure variables }
(right=nil) and
not(po_virtualmethod in procdefinition.procoptions) then
begin
cg.allocallcpuregisters(current_asmdata.CurrAsmList);
cg.a_call_name(current_asmdata.CurrAsmList,'FPC_IOCHECK');
cg.deallocallcpuregisters(current_asmdata.CurrAsmList);
end;
{ release temps of paras }
release_para_temps;
if assigned(methodpointerdone) then
secondpass(methodpointerdone);
end;
begin
ccallparanode:=tcgcallparanode;
ccallnode:=tcgcallnode;
end.
syntax highlighted by Code2HTML, v. 0.9.1