jni/libpcre/sources/sljit/sljitNativeX86_32.c - jami-client-android - Gitiles

 /*
  *    Stack-less Just-In-Time compiler
  *
  *    Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright notice, this list of
  *      conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright notice, this list
  *      of conditions and the following disclaimer in the documentation and/or other materials
  *      provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 /* x86 32-bit arch dependent functions. */

 static int emit_do_imm(struct sljit_compiler *compiler, sljit_ub opcode, sljit_w imm)
 {
 	sljit_ub *buf;

 	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_w));
 	FAIL_IF(!buf);
 	INC_SIZE(1 + sizeof(sljit_w));
 	*buf++ = opcode;
 	*(sljit_w*)buf = imm;
 	return SLJIT_SUCCESS;
 }

 static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, int type)
 {
 	if (type == SLJIT_JUMP) {
 		*code_ptr++ = 0xe9;
 		jump->addr++;
 	}
 	else if (type >= SLJIT_FAST_CALL) {
 		*code_ptr++ = 0xe8;
 		jump->addr++;
 	}
 	else {
 		*code_ptr++ = 0x0f;
 		*code_ptr++ = get_jump_code(type);
 		jump->addr += 2;
 	}

 	if (jump->flags & JUMP_LABEL)
 		jump->flags |= PATCH_MW;
 	else
 		*(sljit_w*)code_ptr = jump->u.target - (jump->addr + 4);
 	code_ptr += 4;

 	return code_ptr;
 }

 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
 {
 	int size;
 	sljit_ub *buf;

 	CHECK_ERROR();
 	check_sljit_emit_enter(compiler, args, temporaries, generals, local_size);

 	compiler->temporaries = temporaries;
 	compiler->generals = generals;
 	compiler->args = args;
 	compiler->flags_saved = 0;

 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	size = 1 + (generals <= 3 ? generals : 3) + (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0);
 #else
 	size = 1 + (generals <= 3 ? generals : 3) + (args > 0 ? (2 + args * 3) : 0);
 #endif
 	buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
 	FAIL_IF(!buf);

 	INC_SIZE(size);
 	PUSH_REG(reg_map[TMP_REGISTER]);
 #if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	if (args > 0) {
 		*buf++ = 0x8b;
 		*buf++ = 0xc4 | (reg_map[TMP_REGISTER] << 3);
 	}
 #endif
 	if (generals > 2)
 		PUSH_REG(reg_map[SLJIT_GENERAL_REG3]);
 	if (generals > 1)
 		PUSH_REG(reg_map[SLJIT_GENERAL_REG2]);
 	if (generals > 0)
 		PUSH_REG(reg_map[SLJIT_GENERAL_REG1]);

 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	if (args > 0) {
 		*buf++ = 0x8b;
 		*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG1] << 3) | reg_map[SLJIT_TEMPORARY_REG3];
 	}
 	if (args > 1) {
 		*buf++ = 0x8b;
 		*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG2] << 3) | reg_map[SLJIT_TEMPORARY_REG2];
 	}
 	if (args > 2) {
 		*buf++ = 0x8b;
 		*buf++ = 0x44 | (reg_map[SLJIT_GENERAL_REG3] << 3);
 		*buf++ = 0x24;
 		*buf++ = sizeof(sljit_w) * (3 + 2); /* generals >= 3 as well. */
 	}
 #else
 	if (args > 0) {
 		*buf++ = 0x8b;
 		*buf++ = 0x40 | (reg_map[SLJIT_GENERAL_REG1] << 3) | reg_map[TMP_REGISTER];
 		*buf++ = sizeof(sljit_w) * 2;
 	}
 	if (args > 1) {
 		*buf++ = 0x8b;
 		*buf++ = 0x40 | (reg_map[SLJIT_GENERAL_REG2] << 3) | reg_map[TMP_REGISTER];
 		*buf++ = sizeof(sljit_w) * 3;
 	}
 	if (args > 2) {
 		*buf++ = 0x8b;
 		*buf++ = 0x40 | (reg_map[SLJIT_GENERAL_REG3] << 3) | reg_map[TMP_REGISTER];
 		*buf++ = sizeof(sljit_w) * 4;
 	}
 #endif

 	local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
 	compiler->temporaries_start = local_size;
 	if (temporaries > 3)
 		local_size += (temporaries - 3) * sizeof(sljit_uw);
 	compiler->generals_start = local_size;
 	if (generals > 3)
 		local_size += (generals - 3) * sizeof(sljit_uw);

 #ifdef _WIN32
 	if (local_size > 1024) {
 		FAIL_IF(emit_do_imm(compiler, 0xb8 + reg_map[SLJIT_TEMPORARY_REG1], local_size));
 		FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_touch_stack)));
 	}
 #endif

 	compiler->local_size = local_size;
 	if (local_size > 0)
 		return emit_non_cum_binary(compiler, 0x2b, 0x29, 0x5 << 3, 0x2d,
 			SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, local_size);

 	/* Mov arguments to general registers. */
 	return SLJIT_SUCCESS;
 }

 SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
 {
 	CHECK_ERROR_VOID();
 	check_sljit_fake_enter(compiler, args, temporaries, generals, local_size);

 	compiler->temporaries = temporaries;
 	compiler->generals = generals;
 	compiler->args = args;
 	compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
 	compiler->temporaries_start = compiler->local_size;
 	if (temporaries > 3)
 		compiler->local_size += (temporaries - 3) * sizeof(sljit_uw);
 	compiler->generals_start = compiler->local_size;
 	if (generals > 3)
 		compiler->local_size += (generals - 3) * sizeof(sljit_uw);
 }

 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
 {
 	int size;
 	sljit_ub *buf;

 	CHECK_ERROR();
 	check_sljit_emit_return(compiler, src, srcw);
 	SLJIT_ASSERT(compiler->args >= 0);

 	compiler->flags_saved = 0;
 	CHECK_EXTRA_REGS(src, srcw, (void)0);

 	if (src != SLJIT_UNUSED && src != SLJIT_RETURN_REG)
 		FAIL_IF(emit_mov(compiler, SLJIT_RETURN_REG, 0, src, srcw));

 	if (compiler->local_size > 0)
 		FAIL_IF(emit_cum_binary(compiler, 0x03, 0x01, 0x0 << 3, 0x05,
 				SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, compiler->local_size));

 	size = 2 + (compiler->generals <= 3 ? compiler->generals : 3);
 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	if (compiler->args > 2)
 		size += 2;
 #else
 	if (compiler->args > 0)
 		size += 2;
 #endif
 	buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
 	FAIL_IF(!buf);

 	INC_SIZE(size);

 	if (compiler->generals > 0)
 		POP_REG(reg_map[SLJIT_GENERAL_REG1]);
 	if (compiler->generals > 1)
 		POP_REG(reg_map[SLJIT_GENERAL_REG2]);
 	if (compiler->generals > 2)
 		POP_REG(reg_map[SLJIT_GENERAL_REG3]);
 	POP_REG(reg_map[TMP_REGISTER]);
 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	if (compiler->args > 2)
 		RETN(sizeof(sljit_w));
 	else
 		RET();
 #else
 	if (compiler->args > 0)
 		RETN(compiler->args * sizeof(sljit_w));
 	else
 		RET();
 #endif

 	return SLJIT_SUCCESS;
 }

 /* --------------------------------------------------------------------- */
 /*  Operators                                                            */
 /* --------------------------------------------------------------------- */

 /* Size contains the flags as well. */
 static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, int size,
 	/* The register or immediate operand. */
 	int a, sljit_w imma,
 	/* The general operand (not immediate). */
 	int b, sljit_w immb)
 {
 	sljit_ub *buf;
 	sljit_ub *buf_ptr;
 	int flags = size & ~0xf;
 	int inst_size;

 	/* Both cannot be switched on. */
 	SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS));
 	/* Size flags not allowed for typed instructions. */
 	SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0);
 	/* Both size flags cannot be switched on. */
 	SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG));
 #if (defined SLJIT_SSE2 && SLJIT_SSE2)
 	/* SSE2 and immediate is not possible. */
 	SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2));
 #endif

 	size &= 0xf;
 	inst_size = size;

 #if (defined SLJIT_SSE2 && SLJIT_SSE2)
 	if (flags & EX86_PREF_F2)
 		inst_size++;
 #endif
 	if (flags & EX86_PREF_66)
 		inst_size++;

 	/* Calculate size of b. */
 	inst_size += 1; /* mod r/m byte. */
 	if (b & SLJIT_MEM) {
 		if ((b & 0x0f) == SLJIT_UNUSED)
 			inst_size += sizeof(sljit_w);
 		else if (immb != 0 && !(b & 0xf0)) {
 			/* Immediate operand. */
 			if (immb <= 127 && immb >= -128)
 				inst_size += sizeof(sljit_b);
 			else
 				inst_size += sizeof(sljit_w);
 		}

 		if ((b & 0xf) == SLJIT_LOCALS_REG && !(b & 0xf0))
 			b |= SLJIT_LOCALS_REG << 4;

 		if ((b & 0xf0) != SLJIT_UNUSED)
 			inst_size += 1; /* SIB byte. */
 	}

 	/* Calculate size of a. */
 	if (a & SLJIT_IMM) {
 		if (flags & EX86_BIN_INS) {
 			if (imma <= 127 && imma >= -128) {
 				inst_size += 1;
 				flags |= EX86_BYTE_ARG;
 			} else
 				inst_size += 4;
 		}
 		else if (flags & EX86_SHIFT_INS) {
 			imma &= 0x1f;
 			if (imma != 1) {
 				inst_size ++;
 				flags |= EX86_BYTE_ARG;
 			}
 		} else if (flags & EX86_BYTE_ARG)
 			inst_size++;
 		else if (flags & EX86_HALF_ARG)
 			inst_size += sizeof(short);
 		else
 			inst_size += sizeof(sljit_w);
 	}
 	else
 		SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);

 	buf = (sljit_ub*)ensure_buf(compiler, 1 + inst_size);
 	PTR_FAIL_IF(!buf);

 	/* Encoding the byte. */
 	INC_SIZE(inst_size);
 #if (defined SLJIT_SSE2 && SLJIT_SSE2)
 	if (flags & EX86_PREF_F2)
 		*buf++ = 0xf2;
 #endif
 	if (flags & EX86_PREF_66)
 		*buf++ = 0x66;

 	buf_ptr = buf + size;

 	/* Encode mod/rm byte. */
 	if (!(flags & EX86_SHIFT_INS)) {
 		if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
 			*buf = (flags & EX86_BYTE_ARG) ? 0x83 : 0x81;

 		if ((a & SLJIT_IMM) || (a == 0))
 			*buf_ptr = 0;
 #if (defined SLJIT_SSE2 && SLJIT_SSE2)
 		else if (!(flags & EX86_SSE2))
 			*buf_ptr = reg_map[a] << 3;
 		else
 			*buf_ptr = a << 3;
 #else
 		else
 			*buf_ptr = reg_map[a] << 3;
 #endif
 	}
 	else {
 		if (a & SLJIT_IMM) {
 			if (imma == 1)
 				*buf = 0xd1;
 			else
 				*buf = 0xc1;
 		} else
 			*buf = 0xd3;
 		*buf_ptr = 0;
 	}

 	if (!(b & SLJIT_MEM))
 #if (defined SLJIT_SSE2 && SLJIT_SSE2)
 		*buf_ptr++ |= 0xc0 + ((!(flags & EX86_SSE2)) ? reg_map[b] : b);
 #else
 		*buf_ptr++ |= 0xc0 + reg_map[b];
 #endif
 	else if ((b & 0x0f) != SLJIT_UNUSED) {
 		if ((b & 0xf0) == SLJIT_UNUSED || (b & 0xf0) == (SLJIT_LOCALS_REG << 4)) {
 			if (immb != 0) {
 				if (immb <= 127 && immb >= -128)
 					*buf_ptr |= 0x40;
 				else
 					*buf_ptr |= 0x80;
 			}

 			if ((b & 0xf0) == SLJIT_UNUSED)
 				*buf_ptr++ |= reg_map[b & 0x0f];
 			else {
 				*buf_ptr++ |= 0x04;
 				*buf_ptr++ = reg_map[b & 0x0f] | (reg_map[(b >> 4) & 0x0f] << 3);
 			}

 			if (immb != 0) {
 				if (immb <= 127 && immb >= -128)
 					*buf_ptr++ = immb; /* 8 bit displacement. */
 				else {
 					*(sljit_w*)buf_ptr = immb; /* 32 bit displacement. */
 					buf_ptr += sizeof(sljit_w);
 				}
 			}
 		}
 		else {
 			*buf_ptr++ |= 0x04;
 			*buf_ptr++ = reg_map[b & 0x0f] | (reg_map[(b >> 4) & 0x0f] << 3) | (immb << 6);
 		}
 	}
 	else {
 		*buf_ptr++ |= 0x05;
 		*(sljit_w*)buf_ptr = immb; /* 32 bit displacement. */
 		buf_ptr += sizeof(sljit_w);
 	}

 	if (a & SLJIT_IMM) {
 		if (flags & EX86_BYTE_ARG)
 			*buf_ptr = imma;
 		else if (flags & EX86_HALF_ARG)
 			*(short*)buf_ptr = imma;
 		else if (!(flags & EX86_SHIFT_INS))
 			*(sljit_w*)buf_ptr = imma;
 	}

 	return !(flags & EX86_SHIFT_INS) ? buf : (buf + 1);
 }

 /* --------------------------------------------------------------------- */
 /*  Call / return instructions                                           */
 /* --------------------------------------------------------------------- */

 static SLJIT_INLINE int call_with_args(struct sljit_compiler *compiler, int type)
 {
 	sljit_ub *buf;

 #if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
 	buf = (sljit_ub*)ensure_buf(compiler, type >= SLJIT_CALL3 ? 1 + 2 + 1 : 1 + 2);
 	FAIL_IF(!buf);
 	INC_SIZE(type >= SLJIT_CALL3 ? 2 + 1 : 2);

 	if (type >= SLJIT_CALL3)
 		PUSH_REG(reg_map[SLJIT_TEMPORARY_REG3]);
 	*buf++ = 0x8b;
 	*buf++ = 0xc0 | (reg_map[SLJIT_TEMPORARY_REG3] << 3) | reg_map[SLJIT_TEMPORARY_REG1];
 #else
 	buf = (sljit_ub*)ensure_buf(compiler, type - SLJIT_CALL0 + 1);
 	FAIL_IF(!buf);
 	INC_SIZE(type - SLJIT_CALL0);
 	if (type >= SLJIT_CALL3)
 		PUSH_REG(reg_map[SLJIT_TEMPORARY_REG3]);
 	if (type >= SLJIT_CALL2)
 		PUSH_REG(reg_map[SLJIT_TEMPORARY_REG2]);
 	PUSH_REG(reg_map[SLJIT_TEMPORARY_REG1]);
 #endif
 	return SLJIT_SUCCESS;
 }

 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int generals, int local_size)
 {
 	sljit_ub *buf;

 	CHECK_ERROR();
 	check_sljit_emit_fast_enter(compiler, dst, dstw, args, temporaries, generals, local_size);

 	compiler->temporaries = temporaries;
 	compiler->generals = generals;
 	compiler->args = args;
 	compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
 	compiler->temporaries_start = compiler->local_size;
 	if (temporaries > 3)
 		compiler->local_size += (temporaries - 3) * sizeof(sljit_uw);
 	compiler->generals_start = compiler->local_size;
 	if (generals > 3)
 		compiler->local_size += (generals - 3) * sizeof(sljit_uw);

 	CHECK_EXTRA_REGS(dst, dstw, (void)0);

 	if (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) {
 		buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
 		FAIL_IF(!buf);

 		INC_SIZE(1);
 		POP_REG(reg_map[dst]);
 		return SLJIT_SUCCESS;
 	}
 	else if (dst & SLJIT_MEM) {
 		buf = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
 		FAIL_IF(!buf);
 		*buf++ = 0x8f;
 		return SLJIT_SUCCESS;
 	}

 	/* For UNUSED dst. Uncommon, but possible. */
 	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
 	FAIL_IF(!buf);

 	INC_SIZE(1);
 	POP_REG(reg_map[TMP_REGISTER]);
 	return SLJIT_SUCCESS;
 }

 SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
 {
 	sljit_ub *buf;

 	CHECK_ERROR();
 	check_sljit_emit_fast_return(compiler, src, srcw);

 	CHECK_EXTRA_REGS(src, srcw, (void)0);

 	if (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_NO_REGISTERS) {
 		buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1);
 		FAIL_IF(!buf);

 		INC_SIZE(1 + 1);
 		PUSH_REG(reg_map[src]);
 	}
 	else if (src & SLJIT_MEM) {
 		buf = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
 		FAIL_IF(!buf);
 		*buf++ = 0xff;
 		*buf |= 6 << 3;

 		buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
 		FAIL_IF(!buf);
 		INC_SIZE(1);
 	}
 	else {
 		/* SLJIT_IMM. */
 		buf = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
 		FAIL_IF(!buf);

 		INC_SIZE(5 + 1);
 		*buf++ = 0x68;
 		*(sljit_w*)buf = srcw;
 		buf += sizeof(sljit_w);
 	}

 	RET();
 	return SLJIT_SUCCESS;
 }
	/*
	* Stack-less Just-In-Time compiler
	*
	* Copyright 2009-2010 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without modification, are
	* permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice, this list of
	* conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright notice, this list
	* of conditions and the following disclaimer in the documentation and/or other materials
	* provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
	* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
	* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
	* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	/* x86 32-bit arch dependent functions. */

	static int emit_do_imm(struct sljit_compiler *compiler, sljit_ub opcode, sljit_w imm)
	{
	sljit_ub *buf;

	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_w));
	FAIL_IF(!buf);
	INC_SIZE(1 + sizeof(sljit_w));
	*buf++ = opcode;
	(sljit_w)buf = imm;
	return SLJIT_SUCCESS;
	}

	static sljit_ub* generate_far_jump_code(struct sljit_jump jump, sljit_ub code_ptr, int type)
	{
	if (type == SLJIT_JUMP) {
	*code_ptr++ = 0xe9;
	jump->addr++;
	}
	else if (type >= SLJIT_FAST_CALL) {
	*code_ptr++ = 0xe8;
	jump->addr++;
	}
	else {
	*code_ptr++ = 0x0f;
	*code_ptr++ = get_jump_code(type);
	jump->addr += 2;
	}

	if (jump->flags & JUMP_LABEL)
	jump->flags \|= PATCH_MW;
	else
	(sljit_w)code_ptr = jump->u.target - (jump->addr + 4);
	code_ptr += 4;

	return code_ptr;
	}

	SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
	{
	int size;
	sljit_ub *buf;

	CHECK_ERROR();
	check_sljit_emit_enter(compiler, args, temporaries, generals, local_size);

	compiler->temporaries = temporaries;
	compiler->generals = generals;
	compiler->args = args;
	compiler->flags_saved = 0;

	#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	size = 1 + (generals <= 3 ? generals : 3) + (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0);
	#else
	size = 1 + (generals <= 3 ? generals : 3) + (args > 0 ? (2 + args * 3) : 0);
	#endif
	buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
	FAIL_IF(!buf);

	INC_SIZE(size);
	PUSH_REG(reg_map[TMP_REGISTER]);
	#if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	if (args > 0) {
	*buf++ = 0x8b;
	*buf++ = 0xc4 \| (reg_map[TMP_REGISTER] << 3);
	}
	#endif
	if (generals > 2)
	PUSH_REG(reg_map[SLJIT_GENERAL_REG3]);
	if (generals > 1)
	PUSH_REG(reg_map[SLJIT_GENERAL_REG2]);
	if (generals > 0)
	PUSH_REG(reg_map[SLJIT_GENERAL_REG1]);

	#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	if (args > 0) {
	*buf++ = 0x8b;
	*buf++ = 0xc0 \| (reg_map[SLJIT_GENERAL_REG1] << 3) \| reg_map[SLJIT_TEMPORARY_REG3];
	}
	if (args > 1) {
	*buf++ = 0x8b;
	*buf++ = 0xc0 \| (reg_map[SLJIT_GENERAL_REG2] << 3) \| reg_map[SLJIT_TEMPORARY_REG2];
	}
	if (args > 2) {
	*buf++ = 0x8b;
	*buf++ = 0x44 \| (reg_map[SLJIT_GENERAL_REG3] << 3);
	*buf++ = 0x24;
	buf++ = sizeof(sljit_w) (3 + 2); /* generals >= 3 as well. */
	}
	#else
	if (args > 0) {
	*buf++ = 0x8b;
	*buf++ = 0x40 \| (reg_map[SLJIT_GENERAL_REG1] << 3) \| reg_map[TMP_REGISTER];
	buf++ = sizeof(sljit_w) 2;
	}
	if (args > 1) {
	*buf++ = 0x8b;
	*buf++ = 0x40 \| (reg_map[SLJIT_GENERAL_REG2] << 3) \| reg_map[TMP_REGISTER];
	buf++ = sizeof(sljit_w) 3;
	}
	if (args > 2) {
	*buf++ = 0x8b;
	*buf++ = 0x40 \| (reg_map[SLJIT_GENERAL_REG3] << 3) \| reg_map[TMP_REGISTER];
	buf++ = sizeof(sljit_w) 4;
	}
	#endif

	local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
	compiler->temporaries_start = local_size;
	if (temporaries > 3)
	local_size += (temporaries - 3) * sizeof(sljit_uw);
	compiler->generals_start = local_size;
	if (generals > 3)
	local_size += (generals - 3) * sizeof(sljit_uw);

	#ifdef _WIN32
	if (local_size > 1024) {
	FAIL_IF(emit_do_imm(compiler, 0xb8 + reg_map[SLJIT_TEMPORARY_REG1], local_size));
	FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_touch_stack)));
	}
	#endif

	compiler->local_size = local_size;
	if (local_size > 0)
	return emit_non_cum_binary(compiler, 0x2b, 0x29, 0x5 << 3, 0x2d,
	SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, local_size);

	/* Mov arguments to general registers. */
	return SLJIT_SUCCESS;
	}

	SLJIT_API_FUNC_ATTRIBUTE void sljit_fake_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
	{
	CHECK_ERROR_VOID();
	check_sljit_fake_enter(compiler, args, temporaries, generals, local_size);

	compiler->temporaries = temporaries;
	compiler->generals = generals;
	compiler->args = args;
	compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
	compiler->temporaries_start = compiler->local_size;
	if (temporaries > 3)
	compiler->local_size += (temporaries - 3) * sizeof(sljit_uw);
	compiler->generals_start = compiler->local_size;
	if (generals > 3)
	compiler->local_size += (generals - 3) * sizeof(sljit_uw);
	}

	SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
	{
	int size;
	sljit_ub *buf;

	CHECK_ERROR();
	check_sljit_emit_return(compiler, src, srcw);
	SLJIT_ASSERT(compiler->args >= 0);

	compiler->flags_saved = 0;
	CHECK_EXTRA_REGS(src, srcw, (void)0);

	if (src != SLJIT_UNUSED && src != SLJIT_RETURN_REG)
	FAIL_IF(emit_mov(compiler, SLJIT_RETURN_REG, 0, src, srcw));

	if (compiler->local_size > 0)
	FAIL_IF(emit_cum_binary(compiler, 0x03, 0x01, 0x0 << 3, 0x05,
	SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, compiler->local_size));

	size = 2 + (compiler->generals <= 3 ? compiler->generals : 3);
	#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	if (compiler->args > 2)
	size += 2;
	#else
	if (compiler->args > 0)
	size += 2;
	#endif
	buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
	FAIL_IF(!buf);

	INC_SIZE(size);

	if (compiler->generals > 0)
	POP_REG(reg_map[SLJIT_GENERAL_REG1]);
	if (compiler->generals > 1)
	POP_REG(reg_map[SLJIT_GENERAL_REG2]);
	if (compiler->generals > 2)
	POP_REG(reg_map[SLJIT_GENERAL_REG3]);
	POP_REG(reg_map[TMP_REGISTER]);
	#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	if (compiler->args > 2)
	RETN(sizeof(sljit_w));
	else
	RET();
	#else
	if (compiler->args > 0)
	RETN(compiler->args * sizeof(sljit_w));
	else
	RET();
	#endif

	return SLJIT_SUCCESS;
	}

	/* --------------------------------------------------------------------- */
	/* Operators */
	/* --------------------------------------------------------------------- */

	/* Size contains the flags as well. */
	static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, int size,
	/* The register or immediate operand. */
	int a, sljit_w imma,
	/* The general operand (not immediate). */
	int b, sljit_w immb)
	{
	sljit_ub *buf;
	sljit_ub *buf_ptr;
	int flags = size & ~0xf;
	int inst_size;

	/* Both cannot be switched on. */
	SLJIT_ASSERT((flags & (EX86_BIN_INS \| EX86_SHIFT_INS)) != (EX86_BIN_INS \| EX86_SHIFT_INS));
	/* Size flags not allowed for typed instructions. */
	SLJIT_ASSERT(!(flags & (EX86_BIN_INS \| EX86_SHIFT_INS)) \|\| (flags & (EX86_BYTE_ARG \| EX86_HALF_ARG)) == 0);
	/* Both size flags cannot be switched on. */
	SLJIT_ASSERT((flags & (EX86_BYTE_ARG \| EX86_HALF_ARG)) != (EX86_BYTE_ARG \| EX86_HALF_ARG));
	#if (defined SLJIT_SSE2 && SLJIT_SSE2)
	/* SSE2 and immediate is not possible. */
	SLJIT_ASSERT(!(a & SLJIT_IMM) \|\| !(flags & EX86_SSE2));
	#endif

	size &= 0xf;
	inst_size = size;

	#if (defined SLJIT_SSE2 && SLJIT_SSE2)
	if (flags & EX86_PREF_F2)
	inst_size++;
	#endif
	if (flags & EX86_PREF_66)
	inst_size++;

	/* Calculate size of b. */
	inst_size += 1; /* mod r/m byte. */
	if (b & SLJIT_MEM) {
	if ((b & 0x0f) == SLJIT_UNUSED)
	inst_size += sizeof(sljit_w);
	else if (immb != 0 && !(b & 0xf0)) {
	/* Immediate operand. */
	if (immb <= 127 && immb >= -128)
	inst_size += sizeof(sljit_b);
	else
	inst_size += sizeof(sljit_w);
	}

	if ((b & 0xf) == SLJIT_LOCALS_REG && !(b & 0xf0))
	b \|= SLJIT_LOCALS_REG << 4;

	if ((b & 0xf0) != SLJIT_UNUSED)
	inst_size += 1; /* SIB byte. */
	}

	/* Calculate size of a. */
	if (a & SLJIT_IMM) {
	if (flags & EX86_BIN_INS) {
	if (imma <= 127 && imma >= -128) {
	inst_size += 1;
	flags \|= EX86_BYTE_ARG;
	} else
	inst_size += 4;
	}
	else if (flags & EX86_SHIFT_INS) {
	imma &= 0x1f;
	if (imma != 1) {
	inst_size ++;
	flags \|= EX86_BYTE_ARG;
	}
	} else if (flags & EX86_BYTE_ARG)
	inst_size++;
	else if (flags & EX86_HALF_ARG)
	inst_size += sizeof(short);
	else
	inst_size += sizeof(sljit_w);
	}
	else
	SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) \|\| a == SLJIT_PREF_SHIFT_REG);

	buf = (sljit_ub*)ensure_buf(compiler, 1 + inst_size);
	PTR_FAIL_IF(!buf);

	/* Encoding the byte. */
	INC_SIZE(inst_size);
	#if (defined SLJIT_SSE2 && SLJIT_SSE2)
	if (flags & EX86_PREF_F2)
	*buf++ = 0xf2;
	#endif
	if (flags & EX86_PREF_66)
	*buf++ = 0x66;

	buf_ptr = buf + size;

	/* Encode mod/rm byte. */
	if (!(flags & EX86_SHIFT_INS)) {
	if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
	*buf = (flags & EX86_BYTE_ARG) ? 0x83 : 0x81;

	if ((a & SLJIT_IMM) \|\| (a == 0))
	*buf_ptr = 0;
	#if (defined SLJIT_SSE2 && SLJIT_SSE2)
	else if (!(flags & EX86_SSE2))
	*buf_ptr = reg_map[a] << 3;
	else
	*buf_ptr = a << 3;
	#else
	else
	*buf_ptr = reg_map[a] << 3;
	#endif
	}
	else {
	if (a & SLJIT_IMM) {
	if (imma == 1)
	*buf = 0xd1;
	else
	*buf = 0xc1;
	} else
	*buf = 0xd3;
	*buf_ptr = 0;
	}

	if (!(b & SLJIT_MEM))
	#if (defined SLJIT_SSE2 && SLJIT_SSE2)
	*buf_ptr++ \|= 0xc0 + ((!(flags & EX86_SSE2)) ? reg_map[b] : b);
	#else
	*buf_ptr++ \|= 0xc0 + reg_map[b];
	#endif
	else if ((b & 0x0f) != SLJIT_UNUSED) {
	if ((b & 0xf0) == SLJIT_UNUSED \|\| (b & 0xf0) == (SLJIT_LOCALS_REG << 4)) {
	if (immb != 0) {
	if (immb <= 127 && immb >= -128)
	*buf_ptr \|= 0x40;
	else
	*buf_ptr \|= 0x80;
	}

	if ((b & 0xf0) == SLJIT_UNUSED)
	*buf_ptr++ \|= reg_map[b & 0x0f];
	else {
	*buf_ptr++ \|= 0x04;
	*buf_ptr++ = reg_map[b & 0x0f] \| (reg_map[(b >> 4) & 0x0f] << 3);
	}

	if (immb != 0) {
	if (immb <= 127 && immb >= -128)
	buf_ptr++ = immb; / 8 bit displacement. */
	else {
	(sljit_w)buf_ptr = immb; /* 32 bit displacement. */
	buf_ptr += sizeof(sljit_w);
	}
	}
	}
	else {
	*buf_ptr++ \|= 0x04;
	*buf_ptr++ = reg_map[b & 0x0f] \| (reg_map[(b >> 4) & 0x0f] << 3) \| (immb << 6);
	}
	}
	else {
	*buf_ptr++ \|= 0x05;
	(sljit_w)buf_ptr = immb; /* 32 bit displacement. */
	buf_ptr += sizeof(sljit_w);
	}

	if (a & SLJIT_IMM) {
	if (flags & EX86_BYTE_ARG)
	*buf_ptr = imma;
	else if (flags & EX86_HALF_ARG)
	(short)buf_ptr = imma;
	else if (!(flags & EX86_SHIFT_INS))
	(sljit_w)buf_ptr = imma;
	}

	return !(flags & EX86_SHIFT_INS) ? buf : (buf + 1);
	}

	/* --------------------------------------------------------------------- */
	/* Call / return instructions */
	/* --------------------------------------------------------------------- */

	static SLJIT_INLINE int call_with_args(struct sljit_compiler *compiler, int type)
	{
	sljit_ub *buf;

	#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
	buf = (sljit_ub*)ensure_buf(compiler, type >= SLJIT_CALL3 ? 1 + 2 + 1 : 1 + 2);
	FAIL_IF(!buf);
	INC_SIZE(type >= SLJIT_CALL3 ? 2 + 1 : 2);

	if (type >= SLJIT_CALL3)
	PUSH_REG(reg_map[SLJIT_TEMPORARY_REG3]);
	*buf++ = 0x8b;
	*buf++ = 0xc0 \| (reg_map[SLJIT_TEMPORARY_REG3] << 3) \| reg_map[SLJIT_TEMPORARY_REG1];
	#else
	buf = (sljit_ub*)ensure_buf(compiler, type - SLJIT_CALL0 + 1);
	FAIL_IF(!buf);
	INC_SIZE(type - SLJIT_CALL0);
	if (type >= SLJIT_CALL3)
	PUSH_REG(reg_map[SLJIT_TEMPORARY_REG3]);
	if (type >= SLJIT_CALL2)
	PUSH_REG(reg_map[SLJIT_TEMPORARY_REG2]);
	PUSH_REG(reg_map[SLJIT_TEMPORARY_REG1]);
	#endif
	return SLJIT_SUCCESS;
	}

	SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_enter(struct sljit_compiler *compiler, int dst, sljit_w dstw, int args, int temporaries, int generals, int local_size)
	{
	sljit_ub *buf;

	CHECK_ERROR();
	check_sljit_emit_fast_enter(compiler, dst, dstw, args, temporaries, generals, local_size);

	compiler->temporaries = temporaries;
	compiler->generals = generals;
	compiler->args = args;
	compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
	compiler->temporaries_start = compiler->local_size;
	if (temporaries > 3)
	compiler->local_size += (temporaries - 3) * sizeof(sljit_uw);
	compiler->generals_start = compiler->local_size;
	if (generals > 3)
	compiler->local_size += (generals - 3) * sizeof(sljit_uw);

	CHECK_EXTRA_REGS(dst, dstw, (void)0);

	if (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS) {
	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
	FAIL_IF(!buf);

	INC_SIZE(1);
	POP_REG(reg_map[dst]);
	return SLJIT_SUCCESS;
	}
	else if (dst & SLJIT_MEM) {
	buf = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
	FAIL_IF(!buf);
	*buf++ = 0x8f;
	return SLJIT_SUCCESS;
	}

	/* For UNUSED dst. Uncommon, but possible. */
	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
	FAIL_IF(!buf);

	INC_SIZE(1);
	POP_REG(reg_map[TMP_REGISTER]);
	return SLJIT_SUCCESS;
	}

	SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
	{
	sljit_ub *buf;

	CHECK_ERROR();
	check_sljit_emit_fast_return(compiler, src, srcw);

	CHECK_EXTRA_REGS(src, srcw, (void)0);

	if (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_NO_REGISTERS) {
	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1);
	FAIL_IF(!buf);

	INC_SIZE(1 + 1);
	PUSH_REG(reg_map[src]);
	}
	else if (src & SLJIT_MEM) {
	buf = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
	FAIL_IF(!buf);
	*buf++ = 0xff;
	*buf \|= 6 << 3;

	buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
	FAIL_IF(!buf);
	INC_SIZE(1);
	}
	else {
	/* SLJIT_IMM. */
	buf = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
	FAIL_IF(!buf);

	INC_SIZE(5 + 1);
	*buf++ = 0x68;
	(sljit_w)buf = srcw;
	buf += sizeof(sljit_w);
	}

	RET();
	return SLJIT_SUCCESS;
	}