/*
 * jit-rules-x86.sel - Instruction selector for x86.
 *
 * Copyright (C) 2004  Southern Storm Software, Pty Ltd.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * Conversion opcodes.
 */

JIT_OP_TRUNC_SBYTE: unary
	[reg] -> {
		inst = widen_byte(inst, $1, 1);
	}

JIT_OP_TRUNC_UBYTE: unary
	[reg] -> {
		inst = widen_byte(inst, $1, 0);
	}

JIT_OP_TRUNC_SHORT: unary
	[reg] -> {
		x86_widen_reg(inst, $1, $1, 1, 1);
	}

JIT_OP_TRUNC_USHORT: unary
	[reg] -> {
		x86_widen_reg(inst, $1, $1, 0, 1);
	}

JIT_OP_CHECK_SBYTE: unary, more_space
	[reg] -> {
		unsigned char *patch1;
		unsigned char *patch2;
		x86_alu_reg_imm(inst, X86_CMP, $1, -128);
		patch1 = inst;
		x86_branch8(inst, X86_CC_LE, 0, 1);
		x86_alu_reg_imm(inst, X86_CMP, $1, 127);
		patch2 = inst;
		x86_branch8(inst, X86_CC_LE, 0, 1);
		x86_patch(patch1, inst);
		inst = throw_builtin(inst, func, JIT_RESULT_OVERFLOW);
		x86_patch(patch2, inst);
	}

JIT_OP_CHECK_UBYTE: unary, more_space
	[reg] -> {
		unsigned char *patch1;
		x86_alu_reg_imm(inst, X86_CMP, $1, 256);
		patch1 = inst;
		x86_branch8(inst, X86_CC_LT, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_OVERFLOW);
		x86_patch(patch1, inst);
	}

JIT_OP_CHECK_SHORT: unary, more_space
	[reg] -> {
		unsigned char *patch1;
		unsigned char *patch2;
		x86_alu_reg_imm(inst, X86_CMP, $1, -32768);
		patch1 = inst;
		x86_branch8(inst, X86_CC_LE, 0, 1);
		x86_alu_reg_imm(inst, X86_CMP, $1, 32767);
		patch2 = inst;
		x86_branch8(inst, X86_CC_LE, 0, 1);
		x86_patch(patch1, inst);
		inst = throw_builtin(inst, func, JIT_RESULT_OVERFLOW);
		x86_patch(patch2, inst);
	}

JIT_OP_CHECK_USHORT: unary, more_space
	[reg] -> {
		unsigned char *patch1;
		x86_alu_reg_imm(inst, X86_CMP, $1, 65536);
		patch1 = inst;
		x86_branch8(inst, X86_CC_LT, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_OVERFLOW);
		x86_patch(patch1, inst);
	}

JIT_OP_CHECK_INT, JIT_OP_CHECK_UINT: unary, more_space
	[reg] -> {
		unsigned char *patch1;
		x86_alu_reg_imm(inst, X86_CMP, $1, 0);
		patch1 = inst;
		x86_branch8(inst, X86_CC_GE, 0, 1);
		inst = throw_builtin(inst, func, JIT_RESULT_OVERFLOW);
		x86_patch(patch1, inst);
	}

JIT_OP_NFLOAT_TO_FLOAT32: unary, stack
	[freg] -> {
		x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(void *));
		x86_fst_membase(inst, X86_ESP, 0, 0, 1);
		x86_fld_membase(inst, X86_ESP, 0, 0);
		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, sizeof(void *));
	}

JIT_OP_NFLOAT_TO_FLOAT64: unary, stack
	[freg] -> {
		x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(jit_float64));
		x86_fst_membase(inst, X86_ESP, 0, 1, 1);
		x86_fld_membase(inst, X86_ESP, 0, 1);
		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, sizeof(jit_float64));
	}

JIT_OP_FLOAT32_TO_NFLOAT, JIT_OP_FLOAT64_TO_NFLOAT: unary, stack
	[freg] -> {
		/* Nothing to do: loading the value onto the FP stack is sufficient */
	}

/*
 * Arithmetic opcodes.
 */

JIT_OP_IADD: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_ADD, $1, $2);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_ADD, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_ADD, $1, $2);
	}

JIT_OP_ISUB: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_SUB, $1, $2);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_SUB, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_SUB, $1, $2);
	}

JIT_OP_IMUL: binary
	[reg, imm] -> {
		/* Handle special cases of immediate multiplies */
		switch($2)
		{
			case 0:
			{
				x86_clear_reg(inst, $1);
			}
			break;

			case 1: break;

			case -1:
			{
				x86_neg_reg(inst, $1);
			}
			break;

			case 2:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 1);
			}
			break;

			case 3:
			{
				/* lea reg, [reg + reg * 2] */
				x86_lea_memindex(inst, $1, $1, 0, $1, 1);
			}
			break;

			case 4:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 2);
			}
			break;

			case 5:
			{
				/* lea reg, [reg + reg * 4] */
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
			}
			break;

			case 6:
			{
				/* lea reg, [reg + reg * 2]; add reg, reg */
				x86_lea_memindex(inst, $1, $1, 0, $1, 1);
				x86_alu_reg_reg(inst, X86_ADD, $1, $1);
			}
			break;

			case 8:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 3);
			}
			break;

			case 9:
			{
				/* lea reg, [reg + reg * 8] */
				x86_lea_memindex(inst, $1, $1, 0, $1, 3);
			}
			break;

			case 10:
			{
				/* lea reg, [reg + reg * 4]; add reg, reg */
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
				x86_alu_reg_reg(inst, X86_ADD, $1, $1);
			}
			break;

			case 12:
			{
				/* lea reg, [reg + reg * 2]; shl reg, 2 */
				x86_lea_memindex(inst, $1, $1, 0, $1, 1);
				x86_shift_reg_imm(inst, X86_SHL, $1, 2);
			}
			break;

			case 16:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 4);
			}
			break;

			case 25:
			{
				/* lea reg, [reg + reg * 4]; lea reg, [reg + reg * 4] */
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
			}
			break;

			case 32:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 5);
			}
			break;

			case 64:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 6);
			}
			break;

			case 100:
			{
				/* lea reg, [reg + reg * 4]; shl reg, 2;
				   lea reg, [reg + reg * 4] */
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
				x86_shift_reg_imm(inst, X86_SHL, $1, 2);
				x86_lea_memindex(inst, $1, $1, 0, $1, 2);
			}
			break;

			case 128:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 7);
			}
			break;

			case 256:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 8);
			}
			break;

			case 512:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 9);
			}
			break;

			case 1024:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 10);
			}
			break;

			case 2048:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 11);
			}
			break;

			case 4096:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 12);
			}
			break;

			case 8192:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 13);
			}
			break;

			case 16384:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 14);
			}
			break;

			case 32768:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 15);
			}
			break;

			case 65536:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 16);
			}
			break;

			case 0x00020000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 17);
			}
			break;

			case 0x00040000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 18);
			}
			break;

			case 0x00080000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 19);
			}
			break;

			case 0x00100000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 20);
			}
			break;

			case 0x00200000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 21);
			}
			break;

			case 0x00400000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 22);
			}
			break;

			case 0x00800000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 23);
			}
			break;

			case 0x01000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 24);
			}
			break;

			case 0x02000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 25);
			}
			break;

			case 0x04000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 26);
			}
			break;

			case 0x08000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 27);
			}
			break;

			case 0x10000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 28);
			}
			break;

			case 0x20000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 29);
			}
			break;

			case 0x40000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 30);
			}
			break;

			case (jit_nint)0x80000000:
			{
				x86_shift_reg_imm(inst, X86_SHL, $1, 31);
			}
			break;

			default:
			{
				x86_imul_reg_reg_imm(inst, $1, $1, $2);
			}
			break;
		}
	}
	[reg, local] -> {
		x86_imul_reg_membase(inst, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_imul_reg_reg(inst, $1, $2);
	}

/* Spill before division to ensure that the arguments end up in
   EAX and ECX, and that EDX is free */
JIT_OP_IDIV: binary, spill_before, more_space
	[reg, imm] -> {
		switch($2)
		{
			case 0:
			{
				inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
			}
			break;

			case 1: break;

			case -1:
			{
				/* Dividing by -1 gives an exception if the argument
				   is minint, or simply negates for other values */
				unsigned char *patch = inst;
				x86_alu_reg_imm(inst, X86_CMP, $1, jit_min_int);
				x86_branch8(inst, X86_CC_NE, 0, 0);
				inst = throw_builtin(inst, func, JIT_RESULT_ARITHMETIC);
				x86_patch(patch, inst);
				x86_neg_reg(inst, $1);
			}
			break;

			case 2:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 1);
			}
			break;

			case 4:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 2);
			}
			break;

			case 8:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 3);
			}
			break;

			case 16:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 4);
			}
			break;

			case 32:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 5);
			}
			break;

			case 64:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 6);
			}
			break;

			case 128:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 7);
			}
			break;

			case 256:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 8);
			}
			break;

			case 512:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 9);
			}
			break;

			case 1024:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 10);
			}
			break;

			case 2048:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 11);
			}
			break;

			case 4096:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 12);
			}
			break;

			case 8192:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 13);
			}
			break;

			case 16384:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 14);
			}
			break;

			case 32768:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 15);
			}
			break;

			case 65536:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 16);
			}
			break;

			case 0x00020000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 17);
			}
			break;

			case 0x00040000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 18);
			}
			break;

			case 0x00080000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 19);
			}
			break;

			case 0x00100000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 20);
			}
			break;

			case 0x00200000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 21);
			}
			break;

			case 0x00400000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 22);
			}
			break;

			case 0x00800000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 23);
			}
			break;

			case 0x01000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 24);
			}
			break;

			case 0x02000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 25);
			}
			break;

			case 0x04000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 26);
			}
			break;

			case 0x08000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 27);
			}
			break;

			case 0x10000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 28);
			}
			break;

			case 0x20000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 29);
			}
			break;

			case 0x40000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 30);
			}
			break;

			case (jit_nint)0x80000000:
			{
				x86_shift_reg_imm(inst, X86_SAR, $1, 31);
			}
			break;

			default:
			{
				x86_mov_reg_imm(inst, X86_ECX, $2);
				x86_cdq(inst);
				x86_div_reg(inst, X86_ECX, 1);
			}
			break;
		}
	}
	[reg, reg] -> {
		unsigned char *patch, *patch2;
		x86_alu_reg_reg(inst, X86_OR, $2, $2);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
		x86_patch(patch, inst);
		x86_alu_reg_imm(inst, X86_CMP, $2, -1);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		x86_alu_reg_imm(inst, X86_CMP, $1, jit_min_int);
		patch2 = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_ARITHMETIC);
		x86_patch(patch, inst);
		x86_patch(patch2, inst);
		x86_cdq(inst);
		x86_div_reg(inst, $2, 1);
	}

JIT_OP_IDIV_UN: binary, spill_before, more_space
	[reg, imm] -> {
		switch($2)
		{
			case 0:
			{
				inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
			}
			break;

			case 1: break;

			case 2:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 1);
			}
			break;

			case 4:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 2);
			}
			break;

			case 8:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 3);
			}
			break;

			case 16:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 4);
			}
			break;

			case 32:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 5);
			}
			break;

			case 64:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 6);
			}
			break;

			case 128:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 7);
			}
			break;

			case 256:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 8);
			}
			break;

			case 512:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 9);
			}
			break;

			case 1024:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 10);
			}
			break;

			case 2048:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 11);
			}
			break;

			case 4096:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 12);
			}
			break;

			case 8192:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 13);
			}
			break;

			case 16384:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 14);
			}
			break;

			case 32768:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 15);
			}
			break;

			case 65536:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 16);
			}
			break;

			case 0x00020000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 17);
			}
			break;

			case 0x00040000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 18);
			}
			break;

			case 0x00080000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 19);
			}
			break;

			case 0x00100000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 20);
			}
			break;

			case 0x00200000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 21);
			}
			break;

			case 0x00400000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 22);
			}
			break;

			case 0x00800000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 23);
			}
			break;

			case 0x01000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 24);
			}
			break;

			case 0x02000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 25);
			}
			break;

			case 0x04000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 26);
			}
			break;

			case 0x08000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 27);
			}
			break;

			case 0x10000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 28);
			}
			break;

			case 0x20000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 29);
			}
			break;

			case 0x40000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 30);
			}
			break;

			case (jit_nint)0x80000000:
			{
				x86_shift_reg_imm(inst, X86_SHR, $1, 31);
			}
			break;

			default:
			{
				x86_mov_reg_imm(inst, X86_ECX, $2);
				x86_clear_reg(inst, X86_EDX);
				x86_div_reg(inst, X86_ECX, 0);
			}
			break;
		}
	}
	[reg, reg] -> {
		unsigned char *patch;
		x86_alu_reg_reg(inst, X86_OR, $2, $2);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
		x86_patch(patch, inst);
		x86_clear_reg(inst, X86_EDX);
		x86_div_reg(inst, $2, 0);
	}

JIT_OP_IREM: binary, spill_before, more_space
	[reg, imm] -> {
		switch($2)
		{
			case 0:
			{
				inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
			}
			break;

			case 1:
			{
				x86_clear_reg(inst, $1);
			}
			break;

			case -1:
			{
				/* Dividing by -1 gives an exception if the argument
				   is minint, or simply gives a remainder of zero */
				unsigned char *patch = inst;
				x86_alu_reg_imm(inst, X86_CMP, $1, jit_min_int);
				x86_branch8(inst, X86_CC_NE, 0, 0);
				inst = throw_builtin(inst, func, JIT_RESULT_ARITHMETIC);
				x86_patch(patch, inst);
				x86_clear_reg(inst, $1);
			}
			break;

			default:
			{
				x86_mov_reg_imm(inst, X86_ECX, $2);
				x86_cdq(inst);
				x86_div_reg(inst, X86_ECX, 1);
				/* TODO: rearrange register assignments to avoid the move */
				x86_mov_reg_reg(inst, X86_EAX, X86_EDX, 4);
			}
			break;
		}
	}
	[reg, reg] -> {
		unsigned char *patch, *patch2;
		x86_alu_reg_reg(inst, X86_OR, $2, $2);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
		x86_patch(patch, inst);
		x86_alu_reg_imm(inst, X86_CMP, $2, -1);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		x86_alu_reg_imm(inst, X86_CMP, $1, jit_min_int);
		patch2 = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_ARITHMETIC);
		x86_patch(patch, inst);
		x86_patch(patch2, inst);
		x86_cdq(inst);
		x86_div_reg(inst, $2, 1);
		x86_mov_reg_reg(inst, X86_EAX, X86_EDX, 4);
	}

JIT_OP_IREM_UN: binary, spill_before, more_space
	[reg, imm] -> {
		switch($2)
		{
			case 0:
			{
				inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
			}
			break;

			case 1:
			{
				x86_clear_reg(inst, $1);
			}
			break;

			case 2:
			case 4:
			case 8:
			case 16:
			case 32:
			case 64:
			case 128:
			case 256:
			case 512:
			case 1024:
			case 2048:
			case 4096:
			case 8192:
			case 16384:
			case 32768:
			case 65536:
			case 0x00020000:
			case 0x00040000:
			case 0x00080000:
			case 0x00100000:
			case 0x00200000:
			case 0x00400000:
			case 0x00800000:
			case 0x01000000:
			case 0x02000000:
			case 0x04000000:
			case 0x08000000:
			case 0x10000000:
			case 0x20000000:
			case 0x40000000:
			case (jit_nint)0x80000000:
			{
				x86_alu_reg_imm(inst, X86_AND, $1, $2 - 1);
			}
			break;

			default:
			{
				x86_mov_reg_imm(inst, X86_ECX, $2);
				x86_clear_reg(inst, X86_EDX);
				x86_div_reg(inst, X86_ECX, 0);
				x86_mov_reg_reg(inst, X86_EAX, X86_EDX, 4);
			}
			break;
		}
	}
	[reg, reg] -> {
		unsigned char *patch;
		x86_alu_reg_reg(inst, X86_OR, $2, $2);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_DIVISION_BY_ZERO);
		x86_patch(patch, inst);
		x86_clear_reg(inst, X86_EDX);
		x86_div_reg(inst, $2, 0);
		x86_mov_reg_reg(inst, X86_EAX, X86_EDX, 4);
	}

JIT_OP_INEG: unary
	[reg] -> {
		x86_neg_reg(inst, $1);
	}

JIT_OP_LADD: binary
	[lreg, imm] -> {
		jit_int value1 = ((jit_int *)($2))[0];
		jit_int value2 = ((jit_int *)($2))[1];
		if(value1 != 0)
		{
			x86_alu_reg_imm(inst, X86_ADD, $1, value1);
			x86_alu_reg_imm(inst, X86_ADC, %1, value2);
		}
		else
		{
			x86_alu_reg_imm(inst, X86_ADD, %1, value2);
		}
	}
	[lreg, local] -> {
		x86_alu_reg_membase(inst, X86_ADD, $1, X86_EBP, $2);
		x86_alu_reg_membase(inst, X86_ADC, %1, X86_EBP, $2 + 4);
	}
	[lreg, lreg] -> {
		x86_alu_reg_reg(inst, X86_ADD, $1, $2);
		x86_alu_reg_reg(inst, X86_ADC, %1, %2);
	}

JIT_OP_LSUB: binary
	[lreg, imm] -> {
		jit_int value1 = ((jit_int *)($2))[0];
		jit_int value2 = ((jit_int *)($2))[1];
		if(value1 != 0)
		{
			x86_alu_reg_imm(inst, X86_SUB, $1, value1);
			x86_alu_reg_imm(inst, X86_SBB, %1, value2);
		}
		else
		{
			x86_alu_reg_imm(inst, X86_SUB, %1, value2);
		}
	}
	[lreg, local] -> {
		x86_alu_reg_membase(inst, X86_SUB, $1, X86_EBP, $2);
		x86_alu_reg_membase(inst, X86_SBB, %1, X86_EBP, $2 + 4);
	}
	[lreg, lreg] -> {
		x86_alu_reg_reg(inst, X86_SUB, $1, $2);
		x86_alu_reg_reg(inst, X86_SBB, %1, %2);
	}

JIT_OP_LNEG: unary
	[lreg] -> {
		x86_not_reg(inst, $1);
		x86_not_reg(inst, %1);
		x86_alu_reg_imm(inst, X86_ADD, $1, 1);
		x86_alu_reg_imm(inst, X86_ADC, %1, 0);
	}

JIT_OP_FADD, JIT_OP_DADD, JIT_OP_NFADD: binary, stack
	[freg, freg] -> {
		x86_fp_op_reg(inst, X86_FADD, 1, 1);
	}

JIT_OP_FSUB, JIT_OP_DSUB, JIT_OP_NFSUB: binary, stack
	[freg, freg] -> {
		x86_fp_op_reg(inst, X86_FSUB, 1, 1);
	}

JIT_OP_FMUL, JIT_OP_DMUL, JIT_OP_NFMUL: binary, stack
	[freg, freg] -> {
		x86_fp_op_reg(inst, X86_FMUL, 1, 1);
	}

JIT_OP_FDIV, JIT_OP_DDIV, JIT_OP_NFDIV: binary, stack
	[freg, freg] -> {
		x86_fp_op_reg(inst, X86_FDIV, 1, 1);
	}

JIT_OP_FREM, JIT_OP_DREM, JIT_OP_NFREM: binary, stack
	[freg, freg] -> {
		unsigned char *label;
		int save_eax = 0;
		if(gen->contents[X86_REG_EAX].num_values > 0 ||
		   gen->contents[X86_REG_EAX].used_for_temp)
		{
			save_eax = 1;
			x86_push_reg(inst, X86_EAX);
		}
		x86_fxch(inst, 1);
		label = inst;
		x86_fprem(inst);
		x86_fnstsw(inst);
		x86_alu_reg_imm(inst, X86_AND, X86_EAX, 0x0400);
		x86_branch(inst, X86_CC_NZ, label, 0);
		x86_fstp(inst, 1);
		if(save_eax)
		{
			x86_pop_reg(inst, X86_EAX);
		}
	}

JIT_OP_FNEG, JIT_OP_DNEG, JIT_OP_NFNEG: unary, stack
	[freg] -> {
		x86_fchs(inst);
	}

/*
 * Bitwise opcodes.
 */

JIT_OP_IAND: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_AND, $1, $2);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_AND, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_AND, $1, $2);
	}

JIT_OP_IOR: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_OR, $1, $2);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_OR, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $2);
	}

JIT_OP_IXOR: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_XOR, $1, $2);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_XOR, $1, X86_EBP, $2);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_XOR, $1, $2);
	}

JIT_OP_INOT: unary
	[reg] -> {
		x86_not_reg(inst, $1);
	}

JIT_OP_ISHL: binary
	[reg, imm] -> {
		x86_shift_reg_imm(inst, X86_SHL, $1, ($2 & 0x1F));
	}
	[reg, reg] -> {
		inst = shift_reg(inst, X86_SHL, $1, $2);
	}

JIT_OP_ISHR: binary
	[reg, imm] -> {
		x86_shift_reg_imm(inst, X86_SAR, $1, ($2 & 0x1F));
	}
	[reg, reg] -> {
		inst = shift_reg(inst, X86_SAR, $1, $2);
	}

JIT_OP_ISHR_UN: binary
	[reg, imm] -> {
		x86_shift_reg_imm(inst, X86_SHR, $1, ($2 & 0x1F));
	}
	[reg, reg] -> {
		inst = shift_reg(inst, X86_SHR, $1, $2);
	}

JIT_OP_LAND: binary
	[lreg, imm] -> {
		jit_int value1 = ((jit_int *)($2))[0];
		jit_int value2 = ((jit_int *)($2))[1];
		x86_alu_reg_imm(inst, X86_AND, $1, value1);
		x86_alu_reg_imm(inst, X86_AND, %1, value2);
	}
	[lreg, local] -> {
		x86_alu_reg_membase(inst, X86_AND, $1, X86_EBP, $2);
		x86_alu_reg_membase(inst, X86_AND, %1, X86_EBP, $2 + 4);
	}
	[lreg, lreg] -> {
		x86_alu_reg_reg(inst, X86_AND, $1, $2);
		x86_alu_reg_reg(inst, X86_AND, %1, %2);
	}

JIT_OP_LOR: binary
	[lreg, imm] -> {
		jit_int value1 = ((jit_int *)($2))[0];
		jit_int value2 = ((jit_int *)($2))[1];
		x86_alu_reg_imm(inst, X86_OR, $1, value1);
		x86_alu_reg_imm(inst, X86_OR, %1, value2);
	}
	[lreg, local] -> {
		x86_alu_reg_membase(inst, X86_OR, $1, X86_EBP, $2);
		x86_alu_reg_membase(inst, X86_OR, %1, X86_EBP, $2 + 4);
	}
	[lreg, lreg] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $2);
		x86_alu_reg_reg(inst, X86_OR, %1, %2);
	}

JIT_OP_LXOR: binary
	[lreg, imm] -> {
		jit_int value1 = ((jit_int *)($2))[0];
		jit_int value2 = ((jit_int *)($2))[1];
		x86_alu_reg_imm(inst, X86_XOR, $1, value1);
		x86_alu_reg_imm(inst, X86_XOR, %1, value2);
	}
	[lreg, local] -> {
		x86_alu_reg_membase(inst, X86_XOR, $1, X86_EBP, $2);
		x86_alu_reg_membase(inst, X86_XOR, %1, X86_EBP, $2 + 4);
	}
	[lreg, lreg] -> {
		x86_alu_reg_reg(inst, X86_XOR, $1, $2);
		x86_alu_reg_reg(inst, X86_XOR, %1, %2);
	}

JIT_OP_LNOT: binary
	[lreg] -> {
		x86_not_reg(inst, $1);
		x86_not_reg(inst, %1);
	}

/*
 * Branch opcodes.
 */

JIT_OP_BR: spill_before
	[] -> {
		inst = output_branch(func, inst, 0xEB /* jmp */, insn);
	}

JIT_OP_BR_IFALSE: unary_branch
	[reg] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = output_branch(func, inst, 0x74 /* eq */, insn);
	}

JIT_OP_BR_ITRUE: unary_branch
	[reg] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = output_branch(func, inst, 0x75 /* ne */, insn);
	}

JIT_OP_BR_IEQ: binary_branch
	[reg, immzero] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = output_branch(func, inst, 0x74 /* eq */, insn);
	}
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x74 /* eq */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x74 /* eq */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x74 /* eq */, insn);
	}

JIT_OP_BR_INE: binary_branch
	[reg, immzero] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = output_branch(func, inst, 0x75 /* ne */, insn);
	}
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x75 /* ne */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x75 /* ne */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x75 /* ne */, insn);
	}

JIT_OP_BR_ILT: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7C /* lt */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x7C /* lt */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7C /* lt */, insn);
	}

JIT_OP_BR_ILT_UN: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x72 /* lt_un */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x72 /* lt_un */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x72 /* lt_un */, insn);
	}

JIT_OP_BR_ILE: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7E /* le */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x7E /* le */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7E /* le */, insn);
	}

JIT_OP_BR_ILE_UN: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x76 /* le_un */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x76 /* le_un */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x76 /* le_un */, insn);
	}

JIT_OP_BR_IGT: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7F /* gt */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x7F /* gt */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7F /* gt */, insn);
	}

JIT_OP_BR_IGT_UN: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x77 /* gt_un */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x77 /* gt_un */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x77 /* gt_un */, insn);
	}

JIT_OP_BR_IGE: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7D /* ge */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x7D /* ge */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x7D /* ge */, insn);
	}

JIT_OP_BR_IGE_UN: binary_branch
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x73 /* ge_un */, insn);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = output_branch(func, inst, 0x73 /* ge_un */, insn);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = output_branch(func, inst, 0x73 /* ge_un */, insn);
	}

/*
 * Comparison opcodes.
 */

JIT_OP_IEQ: binary
	[reg, immzero] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = setcc_reg(inst, $1, X86_CC_EQ, 0);
	}
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_EQ, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_EQ, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_EQ, 0);
	}

JIT_OP_INE: binary
	[reg, immzero] -> {
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		inst = setcc_reg(inst, $1, X86_CC_NE, 0);
	}
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_NE, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_NE, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_NE, 0);
	}

JIT_OP_ILT: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 1);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 1);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 1);
	}

JIT_OP_ILT_UN: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LT, 0);
	}

JIT_OP_ILE: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 1);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 1);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 1);
	}

JIT_OP_ILE_UN: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_LE, 0);
	}

JIT_OP_IGT: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 1);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 1);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 1);
	}

JIT_OP_IGT_UN: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GT, 0);
	}

JIT_OP_IGE: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 1);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 1);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 1);
	}

JIT_OP_IGE_UN: binary
	[reg, imm] -> {
		x86_alu_reg_imm(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 0);
	}
	[reg, local] -> {
		x86_alu_reg_membase(inst, X86_CMP, $1, X86_EBP, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 0);
	}
	[reg, reg] -> {
		x86_alu_reg_reg(inst, X86_CMP, $1, $2);
		inst = setcc_reg(inst, $1, X86_CC_GE, 0);
	}

/*
 * Mathematical opcodes.
 */

JIT_OP_FATAN, JIT_OP_DATAN, JIT_OP_NFATAN: unary, stack, only
	[freg] -> {
		x86_fld1(inst);
		x86_fpatan(inst);
		x86_fldz(inst);
		x86_fp_op_reg(inst, X86_FADD, 1, 1);
	}

JIT_OP_FCOS, JIT_OP_DCOS, JIT_OP_NFCOS: unary, stack, only
	[freg] -> {
		x86_fcos(inst);
		x86_fldz(inst);
		x86_fp_op_reg(inst, X86_FADD, 1, 1);
	}

JIT_OP_FSIN, JIT_OP_DSIN, JIT_OP_NFSIN: unary, stack, only
	[freg] -> {
		x86_fsin(inst);
		x86_fldz(inst);
		x86_fp_op_reg(inst, X86_FADD, 1, 1);
	}

JIT_OP_FSQRT, JIT_OP_DSQRT, JIT_OP_NFSQRT: unary, stack
	[freg] -> {
		x86_fsqrt(inst);
	}

JIT_OP_FABS, JIT_OP_DABS, JIT_OP_NFABS: unary, stack
	[freg] -> {
		x86_fabs(inst);
	}

/*
 * Pointer check opcodes.
 */

JIT_OP_CHECK_NULL: unary_note
	[reg] -> {
		unsigned char *patch;
		x86_alu_reg_reg(inst, X86_OR, $1, $1);
		patch = inst;
		x86_branch8(inst, X86_CC_NE, 0, 0);
		inst = throw_builtin(inst, func, JIT_RESULT_NULL_REFERENCE);
		x86_patch(patch, inst);
	}

/*
 * Function calls.
 */

JIT_OP_CALL:
	[] -> {
		jit_function_t func = (jit_function_t)(insn->dest);
		x86_call_code(inst, func->closure_entry);
	}

JIT_OP_CALL_TAIL:
	[] -> {
		jit_function_t func = (jit_function_t)(insn->dest);
		x86_mov_reg_reg(inst, X86_ESP, X86_EBP, sizeof(void *));
		x86_pop_reg(inst, X86_EBP);
		x86_jump_code(inst, func->closure_entry);
	}

JIT_OP_CALL_INDIRECT:
	[] -> {
		x86_call_reg(inst, X86_EAX);
	}

JIT_OP_CALL_INDIRECT_TAIL:
	[] -> {
		x86_mov_reg_reg(inst, X86_ESP, X86_EBP, sizeof(void *));
		x86_pop_reg(inst, X86_EBP);
		x86_jump_reg(inst, X86_EAX);
	}

JIT_OP_CALL_VTABLE_PTR:
	[] -> {
		x86_call_reg(inst, X86_EAX);
	}

JIT_OP_CALL_VTABLE_PTR_TAIL:
	[] -> {
		x86_mov_reg_reg(inst, X86_ESP, X86_EBP, sizeof(void *));
		x86_pop_reg(inst, X86_EBP);
		x86_jump_reg(inst, X86_EAX);
	}

JIT_OP_CALL_EXTERNAL:
	[] -> {
		x86_call_code(inst, (void *)(insn->dest));
	}

JIT_OP_CALL_EXTERNAL_TAIL:
	[] -> {
		x86_mov_reg_reg(inst, X86_ESP, X86_EBP, sizeof(void *));
		x86_pop_reg(inst, X86_EBP);
		x86_jump_code(inst, (void *)(insn->dest));
	}

JIT_OP_RETURN:
	[] -> {
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_INT: unary_branch
	[reg] -> {
		int cpu_reg = $1;
		if(cpu_reg != X86_EAX)
		{
			x86_mov_reg_reg(inst, X86_EAX, cpu_reg, 4);
		}
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_LONG: unary_branch
	[imm] -> {
		x86_mov_reg_imm(inst, X86_EAX,
						((jit_int *)(insn->value1->address))[0]);
		x86_mov_reg_imm(inst, X86_EDX,
						((jit_int *)(insn->value1->address))[1]);
		inst = jump_to_epilog(gen, inst, block);
	}
	[lreg] -> {
		if($1 != X86_EAX)
		{
			x86_mov_reg_reg(inst, X86_EAX, $1, 4);
			x86_mov_reg_reg(inst, X86_EDX, %1, 4);
		}
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_FLOAT32: unary_note, stack, only
	[freg] -> {
		_jit_regs_free_reg(gen, reg, 1);
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_FLOAT64: unary_note, stack, only
	[freg] -> {
		_jit_regs_free_reg(gen, reg, 1);
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_NFLOAT: unary_note, stack, only
	[freg] -> {
		_jit_regs_free_reg(gen, reg, 1);
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_RETURN_SMALL_STRUCT: unary_branch
	[reg] -> {
		inst = load_small_struct
			(inst, X86_EAX, X86_EDX, $1, 0,
			 jit_value_get_nint_constant(insn->value2), 0);
		inst = jump_to_epilog(gen, inst, block);
	}

JIT_OP_SETUP_FOR_NESTED: spill_before
	[] -> {
		jit_nint nest_reg = jit_value_get_nint_constant(insn->value1);
		if(nest_reg == -1)
		{
			x86_push_reg(inst, X86_EBP);
		}
		else
		{
			x86_mov_reg_reg(inst, _jit_reg_info[nest_reg].cpu_reg,
							X86_EBP, sizeof(void *));
		}
	}

JIT_OP_SETUP_FOR_SIBLING: spill_before
	[] -> {
		jit_value_t parent;
		jit_nint level = jit_value_get_nint_constant(insn->value1);
		jit_nint nest_reg = jit_value_get_nint_constant(insn->value2);
		int cpu_reg;
		if(nest_reg == -1)
		{
			cpu_reg = X86_EAX;
		}
		else
		{
			cpu_reg = _jit_reg_info[nest_reg].cpu_reg;
		}
		parent = func->builder->parent_frame;
		if(parent->in_register)
		{
			x86_mov_reg_reg(inst, cpu_reg,
							_jit_reg_info[parent->reg].cpu_reg,
							sizeof(void *));
		}
		else if(parent->in_global_register)
		{
			x86_mov_reg_reg(inst, cpu_reg,
							_jit_reg_info[parent->global_reg].cpu_reg,
							sizeof(void *));
		}
		else
		{
			_jit_gen_fix_value(parent);
			x86_mov_reg_membase(inst, cpu_reg, X86_EBP,
							    parent->frame_offset, sizeof(void *));
		}
		while(level > 0)
		{
			gen->posn.ptr = inst;
			if(!jit_cache_check_for_n(&(gen->posn), 16))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			x86_mov_reg_membase(inst, cpu_reg, cpu_reg, 0, sizeof(void *));
			--level;
		}
		if(nest_reg == -1)
		{
			x86_push_reg(inst, cpu_reg);
		}
	}

JIT_OP_IMPORT: manual
	[] -> {
		unsigned char *inst;
		int reg;
		jit_nint level = jit_value_get_nint_constant(insn->value2);
		_jit_gen_fix_value(insn->value1);
		reg = _jit_regs_load_value
			(gen, func->builder->parent_frame, 1, 0);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32 + level * 8))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		while(level > 0)
		{
			x86_mov_reg_membase(inst, reg, reg, 0, sizeof(void *));
			--level;
		}
		if(insn->value1->frame_offset != 0)
		{
			x86_alu_reg_imm(inst, X86_ADD, reg, insn->value1->frame_offset);
		}
		gen->posn.ptr = inst;
	}

/*
 * Exception handling.
 */

JIT_OP_THROW: unary_branch
	[reg] -> {
		x86_push_reg(inst, $1);
		if(func->builder->setjmp_value != 0)
		{
			/* We have a "setjmp" block in the current function,
			   so we must record the location of the throw first */
			_jit_gen_fix_value(func->builder->setjmp_value);
			x86_call_imm(inst, 0);
			x86_pop_membase(inst, X86_EBP,
							func->builder->setjmp_value->frame_offset +
							jit_jmp_catch_pc_offset);
		}
		x86_call_code(inst, (void *)jit_exception_throw);
	}

JIT_OP_RETHROW: manual
	[] -> { /* Not used in native code back ends */ }

JIT_OP_LOAD_PC: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_dest_value(gen, insn->dest);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		x86_call_imm(inst, 0);
		x86_pop_reg(inst, _jit_reg_info[reg].cpu_reg);
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_EXCEPTION_PC: manual
	[] -> { /* Not used in native code back ends */ }

JIT_OP_ENTER_FINALLY: manual
	[] -> { /* Nothing to do here: return address on the stack */ }

JIT_OP_LEAVE_FINALLY: spill_before
	[] -> {
		/* The "finally" return address is on the stack */
		x86_ret(inst);
	}

JIT_OP_CALL_FINALLY: spill_before
	[] -> {
		inst = output_branch(func, inst, 0xE8 /* call */, insn);
	}

JIT_OP_ENTER_FILTER: manual
	[] -> {
		/* TODO */
		TODO();
	}

JIT_OP_LEAVE_FILTER: manual
	[] -> {
		/* TODO */
		TODO();
	}

JIT_OP_CALL_FILTER: manual
	[] -> {
		/* TODO */
		TODO();
	}

JIT_OP_CALL_FILTER_RETURN: manual
	[] -> {
		/* TODO */
		TODO();
	}

JIT_OP_ADDRESS_OF_LABEL: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_dest_value(gen, insn->dest);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		inst = output_branch(func, inst, 0xB8 + reg /* mov reg, imm */, insn);
		x86_call_imm(inst, 0);
		x86_alu_reg_membase(inst, X86_ADD, reg, X86_ESP, 0);
		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, sizeof(void *));
		x86_alu_reg_imm(inst, X86_SUB, reg, 5);
		gen->posn.ptr = inst;
	}

/*
 * Data manipulation.
 */

JIT_OP_COPY_LOAD_SBYTE: unary
	[reg] -> {}

JIT_OP_COPY_LOAD_UBYTE: unary
	[reg] -> {}

JIT_OP_COPY_LOAD_SHORT: unary
	[reg] -> {}

JIT_OP_COPY_LOAD_USHORT: unary
	[reg] -> {}

JIT_OP_COPY_INT: unary
	[reg] -> {}

JIT_OP_COPY_LONG: unary
	[lreg] -> {}

JIT_OP_COPY_FLOAT32: unary, stack
	[freg] -> {}

JIT_OP_COPY_FLOAT64: unary, stack
	[freg] -> {}

JIT_OP_COPY_NFLOAT: unary, stack
	[freg] -> {}

JIT_OP_COPY_STRUCT: manual, spill_before
	[] -> {
		unsigned char *inst;
		_jit_gen_fix_value(insn->dest);
		_jit_gen_fix_value(insn->value1);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 128))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		inst = memory_copy(gen, inst, X86_EBP, insn->dest->frame_offset,
						   X86_EBP, insn->value1->frame_offset,
						   jit_type_get_size(jit_value_get_type(insn->dest)));
		gen->posn.ptr = inst;
	}

JIT_OP_COPY_STORE_BYTE: manual
	[] -> {
		unsigned char *inst;
		int reg;
		_jit_regs_force_out(gen, insn->dest, 1);
		_jit_gen_fix_value(insn->dest);
		if(!(insn->value1->is_constant))
		{
			reg = _jit_regs_load_value
				(gen, insn->value1, 0,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
				 				 JIT_INSN_VALUE1_LIVE)));
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			inst = mov_membase_reg_byte
				(inst, X86_EBP, insn->dest->frame_offset,
				 _jit_reg_info[reg].cpu_reg);
			gen->posn.ptr = inst;
		}
		else
		{
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			x86_mov_membase_imm(inst, X86_EBP, insn->dest->frame_offset,
								insn->value1->address, 1);
			gen->posn.ptr = inst;
		}
	}

JIT_OP_COPY_STORE_SHORT: manual
	[] -> {
		unsigned char *inst;
		int reg;
		_jit_regs_force_out(gen, insn->dest, 1);
		_jit_gen_fix_value(insn->dest);
		if(!(insn->value1->is_constant))
		{
			reg = _jit_regs_load_value
				(gen, insn->value1, 0,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
				 				 JIT_INSN_VALUE1_LIVE)));
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			x86_mov_membase_reg(inst, X86_EBP, insn->dest->frame_offset,
								_jit_reg_info[reg].cpu_reg, 2);
			gen->posn.ptr = inst;
		}
		else
		{
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			x86_mov_membase_imm(inst, X86_EBP, insn->dest->frame_offset,
								insn->value1->address, 2);
			gen->posn.ptr = inst;
		}
	}

JIT_OP_ADDRESS_OF: manual
	[] -> {
		unsigned char *inst;
		int reg;
		_jit_regs_force_out(gen, insn->value1, 0);
		_jit_gen_fix_value(insn->value1);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_regs_dest_value(gen, insn->dest);
		reg = _jit_reg_info[reg].cpu_reg;
		x86_lea_membase(inst, reg, X86_EBP, insn->value1->frame_offset);
		gen->posn.ptr = inst;
	}

/*
 * Stack pushes and pops.
 */

JIT_OP_RETURN_REG: manual
	[] -> { /* Nothing to do here */ }

JIT_OP_PUSH_INT: unary_note
	[imm] -> {
		x86_push_imm(inst, $1);
		gen->stack_changed = 1;
	}
	[local] -> {
		x86_push_membase(inst, X86_EBP, $1);
		gen->stack_changed = 1;
	}
	[reg] -> {
		x86_push_reg(inst, $1);
		gen->stack_changed = 1;
	}

JIT_OP_PUSH_LONG: unary_note
	[imm] -> {
		x86_push_imm(inst, ((jit_int *)($1))[1]);
		x86_push_imm(inst, ((jit_int *)($1))[0]);
		gen->stack_changed = 1;
	}
	[local] -> {
		x86_push_membase(inst, X86_EBP, $1 + 4);
		x86_push_membase(inst, X86_EBP, $1);
		gen->stack_changed = 1;
	}
	[reg] -> {
		x86_push_reg(inst, %1);
		x86_push_reg(inst, $1);
		gen->stack_changed = 1;
	}

JIT_OP_PUSH_FLOAT32: unary_note, stack
	[imm] -> {
		jit_int *ptr = (jit_int *)($1);
		x86_push_imm(inst, ptr[0]);
		gen->stack_changed = 1;
	}
	[local] -> {
		x86_push_membase(inst, X86_EBP, $1);
		gen->stack_changed = 1;
	}
	[reg] -> {
		x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(jit_float32));
		x86_fst_membase(inst, X86_ESP, 0, 0, 1);
		_jit_regs_free_reg(gen, reg, 1);
		gen->stack_changed = 1;
	}

JIT_OP_PUSH_FLOAT64: unary_note, stack
	[imm] -> {
		jit_int *ptr = (jit_int *)($1);
		x86_push_imm(inst, ptr[1]);
		x86_push_imm(inst, ptr[0]);
		gen->stack_changed = 1;
	}
	[local] -> {
		x86_push_membase(inst, X86_EBP, $1 + 4);
		x86_push_membase(inst, X86_EBP, $1);
		gen->stack_changed = 1;
	}
	[reg] -> {
		x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(jit_float64));
		x86_fst_membase(inst, X86_ESP, 0, 1, 1);
		_jit_regs_free_reg(gen, reg, 1);
		gen->stack_changed = 1;
	}

JIT_OP_PUSH_NFLOAT: unary_note, stack
	[imm] -> {
		jit_int *ptr = (jit_int *)($1);
		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
			x86_push_imm(inst, ptr[2]);
		}
		x86_push_imm(inst, ptr[1]);
		x86_push_imm(inst, ptr[0]);
		gen->stack_changed = 1;
	}
	[local] -> {
		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
			x86_push_membase(inst, X86_EBP, $1 + 8);
		}
		x86_push_membase(inst, X86_EBP, $1 + 4);
		x86_push_membase(inst, X86_EBP, $1);
		gen->stack_changed = 1;
	}
	[freg] -> {
		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
			x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(jit_nfloat));
			x86_fst80_membase(inst, X86_ESP, 0);
		}
		else
		{
			x86_alu_reg_imm(inst, X86_SUB, X86_ESP, sizeof(jit_float64));
			x86_fst_membase(inst, X86_ESP, 0, 1, 1);
		}
		_jit_regs_free_reg(gen, reg, 1);
		gen->stack_changed = 1;
	}

JIT_OP_PUSH_STRUCT: unary_branch, more_space
	[reg] -> {
		jit_nuint size;
		size = (jit_nuint)jit_value_get_nint_constant(insn->value2);
		if((size % sizeof(void *)) == 0 && size <= 4 * sizeof(void *))
		{
			/* Handle small structures that are a multiple of the word size */
			while(size > 0)
			{
				size -= sizeof(void *);
				x86_push_membase(inst, $1, size);
			}
		}
		else
		{
			/* Handle arbitrary-sized structures */
			x86_alu_reg_imm(inst, X86_SUB, X86_ESP, ROUND_STACK(size));
			inst = memory_copy(gen, inst, X86_ESP, 0, $1, 0, size);
		}
		gen->stack_changed = 1;
	}

JIT_OP_POP_STACK:
	[] -> {
		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, insn->value1->address);
		gen->stack_changed = 1;
	}

JIT_OP_FLUSH_SMALL_STRUCT:
	[] -> {
		jit_nuint size;
		jit_nint offset;
		_jit_gen_fix_value(insn->value1);
		size = jit_type_get_size(jit_value_get_type(insn->value1));
		offset = insn->value1->frame_offset;
		inst = store_small_struct
			(inst, X86_EAX, X86_EDX, X86_EBP, offset, (jit_nint)size, 0);
	}

/*
 * Pointer-relative loads and stores.
 */

JIT_OP_LOAD_RELATIVE_SBYTE: unary
	[reg] -> {
		x86_widen_membase(inst, $1, $1, insn->value2->address, 1, 0);
	}

JIT_OP_LOAD_RELATIVE_UBYTE: unary
	[reg] -> {
		x86_widen_membase(inst, $1, $1, insn->value2->address, 0, 0);
	}

JIT_OP_LOAD_RELATIVE_SHORT: unary
	[reg] -> {
		x86_widen_membase(inst, $1, $1, insn->value2->address, 1, 1);
	}

JIT_OP_LOAD_RELATIVE_USHORT: unary
	[reg] -> {
		x86_widen_membase(inst, $1, $1, insn->value2->address, 0, 1);
	}

JIT_OP_LOAD_RELATIVE_INT: unary
	[reg] -> {
		x86_mov_reg_membase(inst, $1, $1, insn->value2->address, 4);
	}

JIT_OP_LOAD_RELATIVE_LONG: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		int reg2, reg3;
		int frame_offset;
		_jit_gen_fix_value(insn->dest);
		_jit_regs_get_reg_pair(gen, reg, -1, -1, &reg2, &reg3);
		reg  = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;
		reg3 = _jit_reg_info[reg3].cpu_reg;
		frame_offset = insn->dest->frame_offset;
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		x86_mov_reg_membase(inst, reg2, reg, insn->value2->address, 4);
		x86_mov_reg_membase(inst, reg3, reg, insn->value2->address + 4, 4);
		x86_mov_membase_reg(inst, X86_EBP, frame_offset, reg2, 4);
		x86_mov_membase_reg(inst, X86_EBP, frame_offset + 4, reg3, 4);
		insn->dest->in_frame = 1;
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_RELATIVE_FLOAT32: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		_jit_regs_new_top(gen, insn->dest, 8);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		x86_fld_membase(inst, reg, insn->value2->address, 0);
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_RELATIVE_FLOAT64: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		_jit_regs_new_top(gen, insn->dest, 8);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		x86_fld_membase(inst, reg, insn->value2->address, 1);
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_RELATIVE_NFLOAT: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		_jit_regs_new_top(gen, insn->dest, 8);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
			x86_fld80_membase(inst, reg, insn->value2->address);
		}
		else
		{
			x86_fld_membase(inst, reg, insn->value2->address, 1);
		}
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_RELATIVE_STRUCT: unary_branch, more_space
	[reg] -> {
		_jit_gen_fix_value(insn->dest);
		inst = memory_copy(gen, inst, X86_EBP, insn->dest->frame_offset,
						   $1, jit_value_get_nint_constant(insn->value2),
						   jit_type_get_size(jit_value_get_type(insn->dest)));
	}

JIT_OP_STORE_RELATIVE_BYTE: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2;
		if(insn->dest->is_constant)
		{
			reg = insn->dest->address + insn->value2->address;
			if(insn->value1->is_constant)
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				x86_mov_mem_imm(inst, reg, insn->value1->address, 1);
			}
			else
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg2 = _jit_reg_info[reg2].cpu_reg;
				x86_mov_mem_reg(inst, reg, reg2, 1);
			}
			gen->posn.ptr = inst;
		}
		else
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
				 				 JIT_INSN_DEST_LIVE)));
			if(!(insn->value1->is_constant))
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg  = _jit_reg_info[reg].cpu_reg;
				reg2 = _jit_reg_info[reg2].cpu_reg;
				inst = mov_membase_reg_byte
					(inst, reg, insn->value2->address, reg2);
				gen->posn.ptr = inst;
			}
			else
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg = _jit_reg_info[reg].cpu_reg;
				x86_mov_membase_imm(inst, reg, insn->value2->address,
									insn->value1->address, 1);
				gen->posn.ptr = inst;
			}
		}
	}

JIT_OP_STORE_RELATIVE_SHORT: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2;
		if(insn->dest->is_constant)
		{
			reg = insn->dest->address + insn->value2->address;
			if(insn->value1->is_constant)
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				x86_mov_mem_imm(inst, reg, insn->value1->address, 2);
			}
			else
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg2 = _jit_reg_info[reg2].cpu_reg;
				x86_mov_mem_reg(inst, reg, reg2, 2);
			}
			gen->posn.ptr = inst;
		}
		else
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
				 				 JIT_INSN_DEST_LIVE)));
			if(!(insn->value1->is_constant))
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg  = _jit_reg_info[reg].cpu_reg;
				reg2 = _jit_reg_info[reg2].cpu_reg;
				x86_mov_membase_reg(inst, reg, insn->value2->address, reg2, 2);
				gen->posn.ptr = inst;
			}
			else
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg = _jit_reg_info[reg].cpu_reg;
				x86_mov_membase_imm(inst, reg, insn->value2->address,
									insn->value1->address, 2);
				gen->posn.ptr = inst;
			}
		}
	}

JIT_OP_STORE_RELATIVE_INT: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2;
		if(insn->dest->is_constant)
		{
			reg = insn->dest->address + insn->value2->address;
			if(insn->value1->is_constant)
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				x86_mov_mem_imm(inst, reg, insn->value1->address, 4);
			}
			else
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg2 = _jit_reg_info[reg2].cpu_reg;
				x86_mov_mem_reg(inst, reg, reg2, 4);
			}
			gen->posn.ptr = inst;
		}
		else
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
				 				 JIT_INSN_DEST_LIVE)));
			if(!(insn->value1->is_constant))
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, 0,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
					 				 JIT_INSN_VALUE1_LIVE)));
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg  = _jit_reg_info[reg].cpu_reg;
				reg2 = _jit_reg_info[reg2].cpu_reg;
				x86_mov_membase_reg(inst, reg, insn->value2->address, reg2, 4);
				gen->posn.ptr = inst;
			}
			else
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 32))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg = _jit_reg_info[reg].cpu_reg;
				x86_mov_membase_imm(inst, reg, insn->value2->address,
									insn->value1->address, 4);
				gen->posn.ptr = inst;
			}
		}
	}

JIT_OP_STORE_RELATIVE_LONG: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		int reg2, reg3;
		int frame_offset;
		if(!(insn->value1->is_constant))
		{
			_jit_regs_get_reg_pair(gen, reg, -1, -1, &reg2, &reg3);
			_jit_gen_fix_value(insn->value1);
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg  = _jit_reg_info[reg].cpu_reg;
			reg2 = _jit_reg_info[reg2].cpu_reg;
			reg3 = _jit_reg_info[reg3].cpu_reg;
			frame_offset = insn->value1->frame_offset;
			x86_mov_reg_membase(inst, reg2, X86_EBP, frame_offset, 4);
			x86_mov_reg_membase(inst, reg3, X86_EBP, frame_offset + 4, 4);
			x86_mov_membase_reg(inst, reg, insn->value2->address, reg2, 4);
			x86_mov_membase_reg(inst, reg, insn->value2->address + 4, reg3, 4);
			gen->posn.ptr = inst;
		}
		else
		{
			jit_long const_value = jit_value_get_long_constant(insn->value1);
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_mov_membase_imm
				(inst, reg, insn->value2->address,
				 (jit_int)(const_value & jit_max_uint), 4);
			x86_mov_membase_imm
				(inst, reg, insn->value2->address,
				 (jit_int)((const_value >> 32) & jit_max_uint), 4);
			gen->posn.ptr = inst;
		}
	}

JIT_OP_STORE_RELATIVE_FLOAT32: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		if(!(insn->value1->is_constant))
		{
			_jit_regs_load_to_top
				(gen, insn->value1,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
				 				 JIT_INSN_VALUE1_LIVE)), 8);
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_fst_membase(inst, reg, insn->value2->address, 0, 1);
			gen->posn.ptr = inst;
		}
		else
		{
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_mov_membase_imm(inst, reg, insn->value2->address,
								*((int *)(insn->value1->address)), 4);
			gen->posn.ptr = inst;
		}
	}

JIT_OP_STORE_RELATIVE_FLOAT64: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		if(!(insn->value1->is_constant))
		{
			_jit_regs_load_to_top
				(gen, insn->value1,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
				 				 JIT_INSN_VALUE1_LIVE)), 8);
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_fst_membase(inst, reg, insn->value2->address, 1, 1);
			gen->posn.ptr = inst;
		}
		else
		{
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_mov_membase_imm(inst, reg, insn->value2->address,
								((int *)(insn->value1->address))[0], 4);
			x86_mov_membase_imm(inst, reg, insn->value2->address + 4,
								((int *)(insn->value1->address))[1], 4);
			gen->posn.ptr = inst;
		}
	}

JIT_OP_STORE_RELATIVE_NFLOAT: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		if(!(insn->value1->is_constant))
		{
			_jit_regs_load_to_top
				(gen, insn->value1,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
				 				 JIT_INSN_VALUE1_LIVE)), 8);
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			if(sizeof(jit_nfloat) != sizeof(jit_float64))
			{
				x86_fst80_membase(inst, reg, insn->value2->address);
			}
			else
			{
				x86_fst_membase(inst, reg, insn->value2->address, 1, 1);
			}
			gen->posn.ptr = inst;
		}
		else
		{
			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}
			reg = _jit_reg_info[reg].cpu_reg;
			x86_mov_membase_imm(inst, reg, insn->value2->address,
								((int *)(insn->value1->address))[0], 4);
			x86_mov_membase_imm(inst, reg, insn->value2->address + 4,
								((int *)(insn->value1->address))[1], 4);
			if(sizeof(jit_nfloat) != sizeof(jit_float64))
			{
				x86_mov_membase_imm(inst, reg, insn->value2->address + 8,
									((int *)(insn->value1->address))[2], 4);
			}
			gen->posn.ptr = inst;
		}
	}

JIT_OP_STORE_RELATIVE_STRUCT: manual
	[] -> {
		unsigned char *inst;
		int reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		_jit_regs_spill_all(gen);
		_jit_gen_fix_value(insn->value1);
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 128))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		inst = memory_copy(gen, inst, reg, (int)(insn->value2->address),
						   X86_EBP, insn->value1->frame_offset,
						   jit_type_get_size(jit_value_get_type(insn->value1)));
		gen->posn.ptr = inst;
	}

JIT_OP_ADD_RELATIVE: unary
	[reg] -> {
		if(insn->value2->address != 0)
		{
			x86_alu_reg_imm(inst, X86_ADD, $1, insn->value2->address);
		}
	}

/*
 * Array element loads and stores.
 */

JIT_OP_LOAD_ELEMENT_SBYTE: binary
	[reg, reg] -> {
		x86_widen_memindex(inst, $1, $1, 0, $2, 0, 1, 0);
	}

JIT_OP_LOAD_ELEMENT_UBYTE: binary
	[reg, reg] -> {
		x86_widen_memindex(inst, $1, $1, 0, $2, 0, 0, 0);
	}

JIT_OP_LOAD_ELEMENT_SHORT: binary
	[reg, reg] -> {
		x86_widen_memindex(inst, $1, $1, 0, $2, 1, 1, 1);
	}

JIT_OP_LOAD_ELEMENT_USHORT: binary
	[reg, reg] -> {
		x86_widen_memindex(inst, $1, $1, 0, $2, 1, 0, 1);
	}

JIT_OP_LOAD_ELEMENT_INT: binary
	[reg, reg] -> {
		x86_mov_reg_memindex(inst, $1, $1, 0, $2, 2, 4);
	}

JIT_OP_LOAD_ELEMENT_LONG: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, temp_reg, offset;
		_jit_regs_force_out(gen, insn->dest, 1);
		_jit_gen_fix_value(insn->dest);
		reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		reg2 = _jit_regs_load_value
			(gen, insn->value2, 1,
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE |
			 				 JIT_INSN_VALUE2_LIVE)));
		_jit_regs_get_reg_pair(gen, reg, reg2, -1, &temp_reg, 0);
		offset = insn->dest->frame_offset;
		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;
		temp_reg = _jit_reg_info[temp_reg].cpu_reg;
		x86_mov_reg_memindex(inst, temp_reg, reg, 0, reg2, 3, 4);
		x86_mov_reg_memindex(inst, reg2, reg, 4, reg2, 3, 4);
		x86_mov_membase_reg(inst, X86_EBP, offset, temp_reg, 4);
		x86_mov_membase_reg(inst, X86_EBP, offset + 4, reg2, 4);
		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_ELEMENT_FLOAT32: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2;

		reg = _jit_regs_load_value(gen, insn->value1, 0,
			(insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
		reg2 = _jit_regs_load_value(gen, insn->value2, 0,
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));
		_jit_regs_new_top(gen, insn->dest, 8);

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;

		x86_fld_memindex(inst, reg, 0, reg2, 2, 0);

		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_ELEMENT_FLOAT64: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;

		reg = _jit_regs_load_value(gen, insn->value1, 0,
			(insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
		reg2 = _jit_regs_load_value(gen, insn->value2, 0,
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));
		reg3 = _jit_regs_new_top(gen, insn->dest, 8);

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;

		x86_fld_memindex(inst, reg, 0, reg2, 3, 1);

		gen->posn.ptr = inst;
	}

JIT_OP_LOAD_ELEMENT_NFLOAT: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;

		reg = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
		reg2 = _jit_regs_load_value
			(gen, insn->value2, sizeof(jit_nfloat) != sizeof(jit_float64),
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));
		reg3 = _jit_regs_new_top(gen, insn->dest, 8);

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;

		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
        		/* lea reg2, [reg2 + reg2 * 2]  */
			x86_lea_memindex(inst, reg2, reg2, 0, reg2, 1);
			/* fld [reg2 * 4] */
			x86_fld80_memindex(inst, reg, 0, reg2, 2);
		}
		else
		{
			x86_fld_memindex(inst, reg, 0, reg2, 3, 1);
		}

		gen->posn.ptr = inst;
	}

JIT_OP_STORE_ELEMENT_BYTE: ternary
	[reg, reg, reg] -> {
		inst = mov_memindex_reg_byte(inst, $1, 0, $2, $3);
	}

JIT_OP_STORE_ELEMENT_SHORT: ternary
	[reg, reg, reg] -> {
		x86_mov_memindex_reg(inst, $1, 0, $2, 1, $3, 2);
	}

JIT_OP_STORE_ELEMENT_INT: ternary
	[reg, reg, reg] -> {
		x86_mov_memindex_reg(inst, $1, 0, $2, 2, $3, 4);
	}

JIT_OP_STORE_ELEMENT_LONG: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3, reg4;
		int frame_offset;

		_jit_regs_force_out(gen, insn->value2, 1);
		_jit_gen_fix_value(insn->value2);
		reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE |
			 				 JIT_INSN_DEST_LIVE)));
		reg2 = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE |
			 				 JIT_INSN_VALUE1_LIVE)));
		_jit_regs_get_reg_pair(gen, reg, reg2, -1, &reg3, &reg4);

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}
		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;
		reg3 = _jit_reg_info[reg3].cpu_reg;
		reg4 = _jit_reg_info[reg4].cpu_reg;
		frame_offset = insn->value2->frame_offset;

		x86_mov_reg_membase(inst, reg3, X86_EBP, frame_offset, 4);
		x86_mov_reg_membase(inst, reg4, X86_EBP, frame_offset + 4, 4);
		x86_mov_memindex_reg(inst, reg, 0, reg2, 3, reg3, 4);
		x86_mov_memindex_reg(inst, reg, 4, reg2, 3, reg4, 4);

		gen->posn.ptr = inst;
	}

JIT_OP_STORE_ELEMENT_FLOAT32: ternary
	[reg, reg, freg] -> {
		x86_fst_memindex(inst, $1, 0, $2, 2, 0, 1);
	}

JIT_OP_STORE_ELEMENT_FLOAT64: ternary
	[reg, reg, freg] -> {
		x86_fst_memindex(inst, $1, 0, $2, 3, 1, 1);
	}

JIT_OP_STORE_ELEMENT_NFLOAT: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;

		reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
		reg2 = _jit_regs_load_value
			(gen, insn->value1, sizeof(jit_nfloat) != sizeof(jit_float64),
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
		reg3 = _jit_regs_load_value
			(gen, insn->value2, 0,
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));

		inst = (unsigned char *)(gen->posn.ptr);
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		reg = _jit_reg_info[reg].cpu_reg;
		reg2 = _jit_reg_info[reg2].cpu_reg;

		if(sizeof(jit_nfloat) != sizeof(jit_float64))
		{
        		/* lea reg2, [reg2 + reg2 * 2]  */
			x86_lea_memindex(inst, reg2, reg2, 0, reg2, 1);
			/* fst [reg2 * 4] */
			x86_fst80_memindex(inst, reg, 0, reg2, 2);
		}
		else
		{
			x86_fst_memindex(inst, reg, 0, reg2, 3, 1, 1);
		}

		gen->posn.ptr = (unsigned char *)inst;
	}

/*
 * Block operations.
 */

JIT_OP_MEMCPY: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;
		int regi, save_reg3;
		int disp;

		if(insn->value2->is_constant && insn->value2->address <= 0)
		{
		}
		else if(insn->value2->is_constant && insn->value2->address <= 32)
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
			reg2 = _jit_regs_load_value
				(gen, insn->value1, 0,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));

			reg3 = -1;
			save_reg3 = 0;
			for(regi = 0; regi < 4; regi++)
			{
				if(regi != reg && regi != reg2)
				{
					if(gen->contents[regi].num_values == 0 &&
					   !gen->contents[regi].used_for_temp &&
					   !gen->contents[reg].is_long_end)
					{
						reg3 = regi;
						break;
					}
					if(reg3 == -1)
					{
						reg3 = regi;
					}
				}
			}
			if(gen->contents[reg3].num_values > 0 ||
			   gen->contents[regi].used_for_temp ||
			   gen->contents[reg].is_long_end)
			{
				save_reg3 = 1;
			}

			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 256))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}

			reg = _jit_reg_info[reg].cpu_reg;
			reg2 = _jit_reg_info[reg2].cpu_reg;
			reg3 = _jit_reg_info[reg3].cpu_reg;

       			if(save_reg3)
			{
				x86_push_reg(inst, reg3);
			}

			disp = 0;
			while(insn->value2->address >= (disp + 4))
			{
				x86_mov_reg_membase(inst, reg3, reg2, disp, 4);
				x86_mov_membase_reg(inst, reg, disp, reg3, 4);
				disp += 4;
			}
			if(insn->value2->address >= (disp + 2))
			{
				x86_mov_reg_membase(inst, reg3, reg2, disp, 2);
				x86_mov_membase_reg(inst, reg, disp, reg3, 2);
				disp += 2;
			}
			if(insn->value2->address > disp)
			{
				x86_mov_reg_membase(inst, reg3, reg2, disp, 1);
				x86_mov_membase_reg(inst, reg, disp, reg3, 1);
			}

			if(save_reg3)
			{
				x86_pop_reg(inst, reg3);
			}

			gen->posn.ptr = inst;
		}
		else
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
			reg2 = _jit_regs_load_value
				(gen, insn->value1, 0,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
			reg3 = _jit_regs_load_value
				(gen, insn->value2, 0,
				 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));

			/* A function call may destroy EAX,EBX,ECX,EDX registers. */
			/* TODO: do not spill ESI and EDI. */
			_jit_regs_spill_all(gen);

			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}

			x86_push_reg(inst, _jit_reg_info[reg3].cpu_reg);
			x86_push_reg(inst, _jit_reg_info[reg2].cpu_reg);
			x86_push_reg(inst, _jit_reg_info[reg].cpu_reg);
			x86_call_code(inst, jit_memcpy);
			x86_alu_reg_imm(inst, X86_ADD, X86_ESP, 3 * sizeof(void *));

			gen->posn.ptr = inst;
		}
	}

JIT_OP_MEMMOVE: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;

		reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
		reg2 = _jit_regs_load_value
			(gen, insn->value1, 0,
			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
		reg3 = _jit_regs_load_value
			(gen, insn->value2, 0,
			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));

		/* A function call may destroy EAX,EBX,ECX,EDX registers. */
		/* TODO: do not spill ESI and EDI. */
		_jit_regs_spill_all(gen);

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		x86_push_reg(inst, _jit_reg_info[reg3].cpu_reg);
		x86_push_reg(inst, _jit_reg_info[reg2].cpu_reg);
		x86_push_reg(inst, _jit_reg_info[reg].cpu_reg);
		x86_call_code(inst, jit_memmove);
		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, 3 * sizeof(void *));

		gen->posn.ptr = inst;
	}

JIT_OP_MEMSET: manual
	[] -> {
		unsigned char *inst;
		int reg, reg2, reg3;
		int regi, save_reg3;
		int disp;

		if(insn->value2->is_constant && insn->value2->address <= 0)
		{
		}
		else if(insn->value2->is_constant && insn->value2->address <= 32)
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));

			reg2 = -1;
			reg3 = -1;
			save_reg3 = 0;

			if(insn->value1->is_constant)
			{
				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 256))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}
				reg = _jit_reg_info[reg].cpu_reg;
			}
			else
			{
				reg2 = _jit_regs_load_value
					(gen, insn->value1, insn->value2->address >= 4,
					 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));

				if(insn->value2->address >= 2 || !X86_IS_BYTE_REG(reg2))
				{
					reg3 = -1;
					for(regi = 0; regi < 4; regi++)
					{
						if(regi != reg && regi != reg2)
						{
							if(gen->contents[regi].num_values == 0 &&
							   !gen->contents[regi].used_for_temp &&
							   !gen->contents[reg].is_long_end)
							{
								reg3 = regi;
								break;
							}
							if(reg3 == -1)
							{
								reg3 = regi;
							}
						}
					}
					if(gen->contents[reg3].num_values > 0 ||
					   gen->contents[regi].used_for_temp ||
					   gen->contents[reg].is_long_end)
					{
						save_reg3 = 1;
					}
				}

				inst = gen->posn.ptr;
				if(!jit_cache_check_for_n(&(gen->posn), 256))
				{
					jit_cache_mark_full(&(gen->posn));
					return;
				}

				reg = _jit_reg_info[reg].cpu_reg;
				reg2 = _jit_reg_info[reg2].cpu_reg;

				if(insn->value2->address >= 2 || !X86_IS_BYTE_REG(reg2))
				{
					reg3 = _jit_reg_info[reg3].cpu_reg;

                			if(save_reg3)
					{
						x86_push_reg(inst, reg3);
					}

					x86_mov_reg_reg(inst, reg3, reg2, 4);
					if(insn->value2->address >= 2)
					{
						x86_shift_reg_imm(inst, X86_SHL, reg3, 8);
						x86_alu_reg_reg(inst, X86_OR, reg3, reg2);
						if(insn->value2->address >= 4)
						{
							x86_mov_reg_reg(inst, reg2, reg3, 4);
							x86_shift_reg_imm(inst, X86_SHL, reg3, 16);
							x86_alu_reg_reg(inst, X86_OR, reg3, reg2);
						}
					}
				}
			}

			disp = 0;
			while(insn->value2->address >= (disp + 4))
			{
				if(insn->value1->is_constant)
				{
					x86_mov_membase_imm
						(inst, reg, disp,
						 insn->value1->address * 0x01010101, 4);
				}
				else
				{
					x86_mov_membase_reg(inst, reg, disp, reg3, 4);
				}
				disp += 4;
			}
			if(insn->value2->address >= (disp + 2))
			{
				if(insn->value1->is_constant)
				{
					x86_mov_membase_imm
						(inst, reg, disp,
						 insn->value1->address * 0x0101, 2);
				}
				else
				{
					x86_mov_membase_reg(inst, reg, disp, reg3, 2);
				}
				disp += 2;
			}
			if(insn->value2->address > disp)
			{
				if(insn->value1->is_constant)
				{
					x86_mov_membase_imm
						(inst, reg, disp,
						 insn->value1->address, 1);
				}
				else if(insn->value2->address >= 2 || !X86_IS_BYTE_REG(reg2))
				{
					x86_mov_membase_reg(inst, reg, disp, reg3, 1);
				}
				else
				{
					x86_mov_membase_reg(inst, reg, disp, reg2, 1);
				}
			}

			if(save_reg3)
			{
				x86_pop_reg(inst, reg3);
			}

			gen->posn.ptr = inst;
		}
		else
		{
			reg = _jit_regs_load_value
				(gen, insn->dest, 0,
				 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
			reg2 = _jit_regs_load_value
				(gen, insn->value1, 0,
				 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
			reg3 = _jit_regs_load_value
				(gen, insn->value2, 0,
				 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));

			/* A function call may destroy EAX,EBX,ECX,EDX registers. */
			/* TODO: do not spill ESI and EDI. */
			_jit_regs_spill_all(gen);

			inst = gen->posn.ptr;
			if(!jit_cache_check_for_n(&(gen->posn), 32))
			{
				jit_cache_mark_full(&(gen->posn));
				return;
			}

			x86_push_reg(inst, _jit_reg_info[reg3].cpu_reg);
			x86_push_reg(inst, _jit_reg_info[reg2].cpu_reg);
			x86_push_reg(inst, _jit_reg_info[reg].cpu_reg);
			x86_call_code(inst, jit_memset);
			x86_alu_reg_imm(inst, X86_ADD, X86_ESP, 3 * sizeof(void *));

			gen->posn.ptr = inst;
		}
	}

/*
 * Allocate memory from the stack.
 */

JIT_OP_ALLOCA: unary
	[reg] -> {
		x86_alu_reg_imm(inst, X86_ADD, $1, 15);
		x86_alu_reg_imm(inst, X86_AND, $1, ~15);
		x86_alu_reg_reg(inst, X86_SUB, X86_ESP, $1);
		x86_mov_reg_reg(inst, $1, X86_ESP, 4);
		gen->stack_changed = 1;
	}

JIT_OP_JUMP_TABLE: manual
	[] -> {
		unsigned char *inst;
		unsigned char *patch_jump_table;
		unsigned char *patch_fall_through;
		int reg;
		int index;
		jit_label_t *labels;
		jit_nint num_labels;
		jit_block_t block;
		int address;

		reg = _jit_regs_load_value
			(gen, insn->dest, 0,
			 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
		_jit_regs_spill_all(gen);

		labels = (jit_label_t *) insn->value1->address;
		num_labels = insn->value2->address;

		inst = gen->posn.ptr;
		if(!jit_cache_check_for_n(&(gen->posn), 32 + sizeof(void) * num_labels))
		{
			jit_cache_mark_full(&(gen->posn));
			return;
		}

		x86_alu_reg_imm(inst, X86_CMP, reg, num_labels);
		patch_fall_through = inst;
		x86_branch32(inst, X86_CC_GE, 0, 1);

		patch_jump_table = inst;
		x86_jump_memindex(inst, X86_NOBASEREG, 0, reg, 2);
		while(((jit_nint) inst & (sizeof(void*) - 1)) != 0)
		{
			x86_nop(inst);
		}

		// displacement goes after opcode. ModR/M, and SIB bytes
		*((void **)(patch_jump_table + 3)) = inst;

		for(index = 0; index < num_labels; index++)
		{
			block = jit_block_from_label(func, labels[index]);
			if(!block)
			{
				return;
			}

			if(block->address)
			{
				x86_imm_emit32(inst, address);
			}
			else
			{
				/* Output a placeholder and record on the block's fixup list */
				x86_imm_emit32(inst, (int)(block->fixup_absolute_list));
				block->fixup_absolute_list = (void *)(inst - 4);
			}
		}

		x86_patch(patch_fall_through, inst);

		gen->posn.ptr = inst;
	}