1 files changed, 557 insertions, 0 deletions
diff --git a/pcre/sljit/sljitNativeX86_32.c b/pcre/sljit/sljitNativeX86_32.c
new file mode 100644
index 00000000000..2866e8f2a15
--- /dev/null
+++ b/pcre/sljit/sljitNativeX86_32.c
@@ -0,0 +1,557 @@
+/*
+ *    Stack-less Just-In-Time compiler
+ *
+ *    Copyright 2009-2012 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 sljit_si emit_do_imm(struct sljit_compiler *compiler, sljit_ub opcode, sljit_sw imm)
+{
+	sljit_ub *inst;
+
+	inst = (sljit_ub*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_sw));
+	FAIL_IF(!inst);
+	INC_SIZE(1 + sizeof(sljit_sw));
+	*inst++ = opcode;
+	*(sljit_sw*)inst = imm;
+	return SLJIT_SUCCESS;
+}
+
+static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, sljit_si type)
+{
+	if (type == SLJIT_JUMP) {
+		*code_ptr++ = JMP_i32;
+		jump->addr++;
+	}
+	else if (type >= SLJIT_FAST_CALL) {
+		*code_ptr++ = CALL_i32;
+		jump->addr++;
+	}
+	else {
+		*code_ptr++ = GROUP_0F;
+		*code_ptr++ = get_jump_code(type);
+		jump->addr += 2;
+	}
+
+	if (jump->flags & JUMP_LABEL)
+		jump->flags |= PATCH_MW;
+	else
+		*(sljit_sw*)code_ptr = jump->u.target - (jump->addr + 4);
+	code_ptr += 4;
+
+	return code_ptr;
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_enter(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size)
+{
+	sljit_si size;
+	sljit_si locals_offset;
+	sljit_ub *inst;
+
+	CHECK_ERROR();
+	check_sljit_emit_enter(compiler, args, scratches, saveds, local_size);
+
+	compiler->scratches = scratches;
+	compiler->saveds = saveds;
+	compiler->args = args;
+	compiler->flags_saved = 0;
+#if (defined SLJIT_DEBUG && SLJIT_DEBUG)
+	compiler->logical_local_size = local_size;
+#endif
+
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	size = 1 + (saveds <= 3 ? saveds : 3) + (args > 0 ? (args * 2) : 0) + (args > 2 ? 2 : 0);
+#else
+	size = 1 + (saveds <= 3 ? saveds : 3) + (args > 0 ? (2 + args * 3) : 0);
+#endif
+	inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
+	FAIL_IF(!inst);
+
+	INC_SIZE(size);
+	PUSH_REG(reg_map[TMP_REGISTER]);
+#if !(defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	if (args > 0) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_REG | (reg_map[TMP_REGISTER] << 3) | 0x4 /* esp */;
+	}
+#endif
+	if (saveds > 2)
+		PUSH_REG(reg_map[SLJIT_SAVED_REG3]);
+	if (saveds > 1)
+		PUSH_REG(reg_map[SLJIT_SAVED_REG2]);
+	if (saveds > 0)
+		PUSH_REG(reg_map[SLJIT_SAVED_REG1]);
+
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	if (args > 0) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG1] << 3) | reg_map[SLJIT_SCRATCH_REG3];
+	}
+	if (args > 1) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_REG | (reg_map[SLJIT_SAVED_REG2] << 3) | reg_map[SLJIT_SCRATCH_REG2];
+	}
+	if (args > 2) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SAVED_REG3] << 3) | 0x4 /* esp */;
+		*inst++ = 0x24;
+		*inst++ = sizeof(sljit_sw) * (3 + 2); /* saveds >= 3 as well. */
+	}
+#else
+	if (args > 0) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SAVED_REG1] << 3) | reg_map[TMP_REGISTER];
+		*inst++ = sizeof(sljit_sw) * 2;
+	}
+	if (args > 1) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SAVED_REG2] << 3) | reg_map[TMP_REGISTER];
+		*inst++ = sizeof(sljit_sw) * 3;
+	}
+	if (args > 2) {
+		*inst++ = MOV_r_rm;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SAVED_REG3] << 3) | reg_map[TMP_REGISTER];
+		*inst++ = sizeof(sljit_sw) * 4;
+	}
+#endif
+
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	locals_offset = 2 * sizeof(sljit_uw);
+#else
+	SLJIT_COMPILE_ASSERT(FIXED_LOCALS_OFFSET >= 2 * sizeof(sljit_uw), require_at_least_two_words);
+	locals_offset = FIXED_LOCALS_OFFSET;
+#endif
+	compiler->scratches_start = locals_offset;
+	if (scratches > 3)
+		locals_offset += (scratches - 3) * sizeof(sljit_uw);
+	compiler->saveds_start = locals_offset;
+	if (saveds > 3)
+		locals_offset += (saveds - 3) * sizeof(sljit_uw);
+	compiler->locals_offset = locals_offset;
+#if defined(__APPLE__)
+	saveds = (2 + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
+	local_size = ((locals_offset + saveds + local_size + 15) & ~15) - saveds;
+#else
+	local_size = locals_offset + ((local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1));
+#endif
+
+	compiler->local_size = local_size;
+#ifdef _WIN32
+	if (local_size > 1024) {
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+		FAIL_IF(emit_do_imm(compiler, MOV_r_i32 + reg_map[SLJIT_SCRATCH_REG1], local_size));
+#else
+		local_size -= FIXED_LOCALS_OFFSET;
+		FAIL_IF(emit_do_imm(compiler, MOV_r_i32 + reg_map[SLJIT_SCRATCH_REG1], local_size));
+		FAIL_IF(emit_non_cum_binary(compiler, SUB_r_rm, SUB_rm_r, SUB, SUB_EAX_i32,
+			SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, FIXED_LOCALS_OFFSET));
+#endif
+		FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_grow_stack)));
+	}
+#endif
+
+	SLJIT_ASSERT(local_size > 0);
+	return emit_non_cum_binary(compiler, SUB_r_rm, SUB_rm_r, SUB, SUB_EAX_i32,
+		SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, local_size);
+}
+
+SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler, sljit_si args, sljit_si scratches, sljit_si saveds, sljit_si local_size)
+{
+	sljit_si locals_offset;
+
+	CHECK_ERROR_VOID();
+	check_sljit_set_context(compiler, args, scratches, saveds, local_size);
+
+	compiler->scratches = scratches;
+	compiler->saveds = saveds;
+	compiler->args = args;
+#if (defined SLJIT_DEBUG && SLJIT_DEBUG)
+	compiler->logical_local_size = local_size;
+#endif
+
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	locals_offset = 2 * sizeof(sljit_uw);
+#else
+	locals_offset = FIXED_LOCALS_OFFSET;
+#endif
+	compiler->scratches_start = locals_offset;
+	if (scratches > 3)
+		locals_offset += (scratches - 3) * sizeof(sljit_uw);
+	compiler->saveds_start = locals_offset;
+	if (saveds > 3)
+		locals_offset += (saveds - 3) * sizeof(sljit_uw);
+	compiler->locals_offset = locals_offset;
+#if defined(__APPLE__)
+	saveds = (2 + (saveds <= 3 ? saveds : 3)) * sizeof(sljit_uw);
+	compiler->local_size = ((locals_offset + saveds + local_size + 15) & ~15) - saveds;
+#else
+	compiler->local_size = locals_offset + ((local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1));
+#endif
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_return(struct sljit_compiler *compiler, sljit_si op, sljit_si src, sljit_sw srcw)
+{
+	sljit_si size;
+	sljit_ub *inst;
+
+	CHECK_ERROR();
+	check_sljit_emit_return(compiler, op, src, srcw);
+	SLJIT_ASSERT(compiler->args >= 0);
+
+	compiler->flags_saved = 0;
+	FAIL_IF(emit_mov_before_return(compiler, op, src, srcw));
+
+	SLJIT_ASSERT(compiler->local_size > 0);
+	FAIL_IF(emit_cum_binary(compiler, ADD_r_rm, ADD_rm_r, ADD, ADD_EAX_i32,
+		SLJIT_LOCALS_REG, 0, SLJIT_LOCALS_REG, 0, SLJIT_IMM, compiler->local_size));
+
+	size = 2 + (compiler->saveds <= 3 ? compiler->saveds : 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
+	inst = (sljit_ub*)ensure_buf(compiler, 1 + size);
+	FAIL_IF(!inst);
+
+	INC_SIZE(size);
+
+	if (compiler->saveds > 0)
+		POP_REG(reg_map[SLJIT_SAVED_REG1]);
+	if (compiler->saveds > 1)
+		POP_REG(reg_map[SLJIT_SAVED_REG2]);
+	if (compiler->saveds > 2)
+		POP_REG(reg_map[SLJIT_SAVED_REG3]);
+	POP_REG(reg_map[TMP_REGISTER]);
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	if (compiler->args > 2)
+		RET_I16(sizeof(sljit_sw));
+	else
+		RET();
+#else
+	RET();
+#endif
+
+	return SLJIT_SUCCESS;
+}
+
+/* --------------------------------------------------------------------- */
+/*  Operators                                                            */
+/* --------------------------------------------------------------------- */
+
+/* Size contains the flags as well. */
+static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, sljit_si size,
+	/* The register or immediate operand. */
+	sljit_si a, sljit_sw imma,
+	/* The general operand (not immediate). */
+	sljit_si b, sljit_sw immb)
+{
+	sljit_ub *inst;
+	sljit_ub *buf_ptr;
+	sljit_si flags = size & ~0xf;
+	sljit_si 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));
+	SLJIT_ASSERT((flags & (EX86_PREF_F2 | EX86_PREF_F3)) != (EX86_PREF_F2 | EX86_PREF_F3)
+		&& (flags & (EX86_PREF_F2 | EX86_PREF_66)) != (EX86_PREF_F2 | EX86_PREF_66)
+		&& (flags & (EX86_PREF_F3 | EX86_PREF_66)) != (EX86_PREF_F3 | EX86_PREF_66));
+#endif
+
+	size &= 0xf;
+	inst_size = size;
+
+#if (defined SLJIT_SSE2 && SLJIT_SSE2)
+	if (flags & (EX86_PREF_F2 | EX86_PREF_F3))
+		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_sw);
+		else if (immb != 0 && !(b & 0xf0)) {
+			/* Immediate operand. */
+			if (immb <= 127 && immb >= -128)
+				inst_size += sizeof(sljit_sb);
+			else
+				inst_size += sizeof(sljit_sw);
+		}
+
+		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_sw);
+	}
+	else
+		SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);
+
+	inst = (sljit_ub*)ensure_buf(compiler, 1 + inst_size);
+	PTR_FAIL_IF(!inst);
+
+	/* Encoding the byte. */
+	INC_SIZE(inst_size);
+#if (defined SLJIT_SSE2 && SLJIT_SSE2)
+	if (flags & EX86_PREF_F2)
+		*inst++ = 0xf2;
+	if (flags & EX86_PREF_F3)
+		*inst++ = 0xf3;
+#endif
+	if (flags & EX86_PREF_66)
+		*inst++ = 0x66;
+
+	buf_ptr = inst + size;
+
+	/* Encode mod/rm byte. */
+	if (!(flags & EX86_SHIFT_INS)) {
+		if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
+			*inst = (flags & EX86_BYTE_ARG) ? GROUP_BINARY_83 : GROUP_BINARY_81;
+
+		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)
+				*inst = GROUP_SHIFT_1;
+			else
+				*inst = GROUP_SHIFT_N;
+		} else
+			*inst = GROUP_SHIFT_CL;
+		*buf_ptr = 0;
+	}
+
+	if (!(b & SLJIT_MEM))
+#if (defined SLJIT_SSE2 && SLJIT_SSE2)
+		*buf_ptr++ |= MOD_REG + ((!(flags & EX86_SSE2)) ? reg_map[b] : b);
+#else
+		*buf_ptr++ |= MOD_REG + 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_sw*)buf_ptr = immb; /* 32 bit displacement. */
+					buf_ptr += sizeof(sljit_sw);
+				}
+			}
+		}
+		else {
+			*buf_ptr++ |= 0x04;
+			*buf_ptr++ = reg_map[b & 0x0f] | (reg_map[(b >> 4) & 0x0f] << 3) | (immb << 6);
+		}
+	}
+	else {
+		*buf_ptr++ |= 0x05;
+		*(sljit_sw*)buf_ptr = immb; /* 32 bit displacement. */
+		buf_ptr += sizeof(sljit_sw);
+	}
+
+	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_sw*)buf_ptr = imma;
+	}
+
+	return !(flags & EX86_SHIFT_INS) ? inst : (inst + 1);
+}
+
+/* --------------------------------------------------------------------- */
+/*  Call / return instructions                                           */
+/* --------------------------------------------------------------------- */
+
+static SLJIT_INLINE sljit_si call_with_args(struct sljit_compiler *compiler, sljit_si type)
+{
+	sljit_ub *inst;
+
+#if (defined SLJIT_X86_32_FASTCALL && SLJIT_X86_32_FASTCALL)
+	inst = (sljit_ub*)ensure_buf(compiler, type >= SLJIT_CALL3 ? 1 + 2 + 1 : 1 + 2);
+	FAIL_IF(!inst);
+	INC_SIZE(type >= SLJIT_CALL3 ? 2 + 1 : 2);
+
+	if (type >= SLJIT_CALL3)
+		PUSH_REG(reg_map[SLJIT_SCRATCH_REG3]);
+	*inst++ = MOV_r_rm;
+	*inst++ = MOD_REG | (reg_map[SLJIT_SCRATCH_REG3] << 3) | reg_map[SLJIT_SCRATCH_REG1];
+#else
+	inst = (sljit_ub*)ensure_buf(compiler, 1 + 4 * (type - SLJIT_CALL0));
+	FAIL_IF(!inst);
+	INC_SIZE(4 * (type - SLJIT_CALL0));
+
+	*inst++ = MOV_rm_r;
+	*inst++ = MOD_DISP8 | (reg_map[SLJIT_SCRATCH_REG1] << 3) | 0x4 /* SIB */;
+	*inst++ = (0x4 /* none*/ << 3) | reg_map[SLJIT_LOCALS_REG];
+	*inst++ = 0;
+	if (type >= SLJIT_CALL2) {
+		*inst++ = MOV_rm_r;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SCRATCH_REG2] << 3) | 0x4 /* SIB */;
+		*inst++ = (0x4 /* none*/ << 3) | reg_map[SLJIT_LOCALS_REG];
+		*inst++ = sizeof(sljit_sw);
+	}
+	if (type >= SLJIT_CALL3) {
+		*inst++ = MOV_rm_r;
+		*inst++ = MOD_DISP8 | (reg_map[SLJIT_SCRATCH_REG3] << 3) | 0x4 /* SIB */;
+		*inst++ = (0x4 /* none*/ << 3) | reg_map[SLJIT_LOCALS_REG];
+		*inst++ = 2 * sizeof(sljit_sw);
+	}
+#endif
+	return SLJIT_SUCCESS;
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_enter(struct sljit_compiler *compiler, sljit_si dst, sljit_sw dstw)
+{
+	sljit_ub *inst;
+
+	CHECK_ERROR();
+	check_sljit_emit_fast_enter(compiler, dst, dstw);
+	ADJUST_LOCAL_OFFSET(dst, dstw);
+
+	CHECK_EXTRA_REGS(dst, dstw, (void)0);
+
+	/* For UNUSED dst. Uncommon, but possible. */
+	if (dst == SLJIT_UNUSED)
+		dst = TMP_REGISTER;
+
+	if (dst <= TMP_REGISTER) {
+		/* Unused dest is possible here. */
+		inst = (sljit_ub*)ensure_buf(compiler, 1 + 1);
+		FAIL_IF(!inst);
+
+		INC_SIZE(1);
+		POP_REG(reg_map[dst]);
+		return SLJIT_SUCCESS;
+	}
+
+	/* Memory. */
+	inst = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
+	FAIL_IF(!inst);
+	*inst++ = POP_rm;
+	return SLJIT_SUCCESS;
+}
+
+SLJIT_API_FUNC_ATTRIBUTE sljit_si sljit_emit_fast_return(struct sljit_compiler *compiler, sljit_si src, sljit_sw srcw)
+{
+	sljit_ub *inst;
+
+	CHECK_ERROR();
+	check_sljit_emit_fast_return(compiler, src, srcw);
+	ADJUST_LOCAL_OFFSET(src, srcw);
+
+	CHECK_EXTRA_REGS(src, srcw, (void)0);
+
+	if (src <= TMP_REGISTER) {
+		inst = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1);
+		FAIL_IF(!inst);
+
+		INC_SIZE(1 + 1);
+		PUSH_REG(reg_map[src]);
+	}
+	else if (src & SLJIT_MEM) {
+		inst = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
+		FAIL_IF(!inst);
+		*inst++ = GROUP_FF;
+		*inst |= PUSH_rm;
+
+		inst = (sljit_ub*)ensure_buf(compiler, 1 + 1);
+		FAIL_IF(!inst);
+		INC_SIZE(1);
+	}
+	else {
+		/* SLJIT_IMM. */
+		inst = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
+		FAIL_IF(!inst);
+
+		INC_SIZE(5 + 1);
+		*inst++ = PUSH_i32;
+		*(sljit_sw*)inst = srcw;
+		inst += sizeof(sljit_sw);
+	}
+
+	RET();
+	return SLJIT_SUCCESS;
+}