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/*
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* Stack-less Just-In-Time compiler
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*
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* Copyright 2009-2012 Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* x86 64-bit arch dependent functions. */
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static int emit_load_imm64(struct sljit_compiler *compiler, int reg, sljit_w imm)
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{
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sljit_ub *buf;
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buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_w));
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FAIL_IF(!buf);
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INC_SIZE(2 + sizeof(sljit_w));
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*buf++ = REX_W | ((reg_map[reg] <= 7) ? 0 : REX_B);
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*buf++ = 0xb8 + (reg_map[reg] & 0x7);
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*(sljit_w*)buf = imm;
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return SLJIT_SUCCESS;
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}
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static sljit_ub* generate_far_jump_code(struct sljit_jump *jump, sljit_ub *code_ptr, int type)
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{
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if (type < SLJIT_JUMP) {
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*code_ptr++ = get_jump_code(type ^ 0x1) - 0x10;
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*code_ptr++ = 10 + 3;
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}
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SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_first);
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*code_ptr++ = REX_W | REX_B;
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*code_ptr++ = 0xb8 + 1;
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jump->addr = (sljit_uw)code_ptr;
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if (jump->flags & JUMP_LABEL)
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jump->flags |= PATCH_MD;
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else
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*(sljit_w*)code_ptr = jump->u.target;
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code_ptr += sizeof(sljit_w);
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*code_ptr++ = REX_B;
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*code_ptr++ = 0xff;
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*code_ptr++ = (type >= SLJIT_FAST_CALL) ? 0xd1 /* call */ : 0xe1 /* jmp */;
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return code_ptr;
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}
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static sljit_ub* generate_fixed_jump(sljit_ub *code_ptr, sljit_w addr, int type)
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{
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sljit_w delta = addr - ((sljit_w)code_ptr + 1 + sizeof(sljit_hw));
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if (delta <= SLJIT_W(0x7fffffff) && delta >= SLJIT_W(-0x80000000)) {
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*code_ptr++ = (type == 2) ? 0xe8 /* call */ : 0xe9 /* jmp */;
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*(sljit_w*)code_ptr = delta;
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}
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else {
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SLJIT_COMPILE_ASSERT(reg_map[TMP_REG3] == 9, tmp3_is_9_second);
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*code_ptr++ = REX_W | REX_B;
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*code_ptr++ = 0xb8 + 1;
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*(sljit_w*)code_ptr = addr;
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code_ptr += sizeof(sljit_w);
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*code_ptr++ = REX_B;
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*code_ptr++ = 0xff;
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*code_ptr++ = (type == 2) ? 0xd1 /* call */ : 0xe1 /* jmp */;
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}
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return code_ptr;
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}
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SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_enter(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
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{
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int size, pushed_size;
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sljit_ub *buf;
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CHECK_ERROR();
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check_sljit_emit_enter(compiler, args, temporaries, generals, local_size);
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compiler->temporaries = temporaries;
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compiler->generals = generals;
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compiler->flags_saved = 0;
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size = generals;
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/* Including the return address saved by the call instruction. */
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pushed_size = (generals + 1) * sizeof(sljit_w);
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#ifndef _WIN64
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if (generals >= 2)
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size += generals - 1;
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#else
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/* Saving the virtual stack pointer. */
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compiler->has_locals = local_size > 0;
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if (local_size > 0) {
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size += 2;
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pushed_size += sizeof(sljit_w);
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}
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if (generals >= 4)
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size += generals - 3;
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if (temporaries >= 5) {
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size += (5 - 4) * 2;
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pushed_size += sizeof(sljit_w);
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}
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#endif
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size += args * 3;
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if (size > 0) {
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buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
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FAIL_IF(!buf);
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INC_SIZE(size);
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if (generals >= 5) {
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_EREG2] >= 8, general_ereg2_is_hireg);
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*buf++ = REX_B;
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PUSH_REG(reg_lmap[SLJIT_GENERAL_EREG2]);
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}
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if (generals >= 4) {
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_EREG1] >= 8, general_ereg1_is_hireg);
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*buf++ = REX_B;
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PUSH_REG(reg_lmap[SLJIT_GENERAL_EREG1]);
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}
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if (generals >= 3) {
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#ifndef _WIN64
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG3] >= 8, general_reg3_is_hireg);
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*buf++ = REX_B;
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#else
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG3] < 8, general_reg3_is_loreg);
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#endif
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PUSH_REG(reg_lmap[SLJIT_GENERAL_REG3]);
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}
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if (generals >= 2) {
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#ifndef _WIN64
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG2] >= 8, general_reg2_is_hireg);
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*buf++ = REX_B;
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#else
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG2] < 8, general_reg2_is_loreg);
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#endif
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PUSH_REG(reg_lmap[SLJIT_GENERAL_REG2]);
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}
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if (generals >= 1) {
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_GENERAL_REG1] < 8, general_reg1_is_loreg);
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PUSH_REG(reg_lmap[SLJIT_GENERAL_REG1]);
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}
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#ifdef _WIN64
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if (temporaries >= 5) {
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_EREG2] >= 8, temporary_ereg2_is_hireg);
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*buf++ = REX_B;
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PUSH_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]);
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}
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if (local_size > 0) {
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SLJIT_COMPILE_ASSERT(reg_map[SLJIT_LOCALS_REG] >= 8, locals_reg_is_hireg);
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*buf++ = REX_B;
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PUSH_REG(reg_lmap[SLJIT_LOCALS_REG]);
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}
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#endif
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#ifndef _WIN64
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if (args > 0) {
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*buf++ = REX_W;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG1] << 3) | 0x7;
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}
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if (args > 1) {
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*buf++ = REX_W | REX_R;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_lmap[SLJIT_GENERAL_REG2] << 3) | 0x6;
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}
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if (args > 2) {
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*buf++ = REX_W | REX_R;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_lmap[SLJIT_GENERAL_REG3] << 3) | 0x2;
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}
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#else
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if (args > 0) {
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*buf++ = REX_W;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG1] << 3) | 0x1;
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}
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if (args > 1) {
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*buf++ = REX_W;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG2] << 3) | 0x2;
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}
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if (args > 2) {
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*buf++ = REX_W | REX_B;
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*buf++ = 0x8b;
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*buf++ = 0xc0 | (reg_map[SLJIT_GENERAL_REG3] << 3) | 0x0;
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}
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#endif
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}
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local_size = ((local_size + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size;
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#ifdef _WIN64
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local_size += 4 * sizeof(sljit_w);
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compiler->local_size = local_size;
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if (local_size > 1024) {
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/* Allocate the stack for the function itself. */
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buf = (sljit_ub*)ensure_buf(compiler, 1 + 4);
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FAIL_IF(!buf);
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INC_SIZE(4);
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*buf++ = REX_W;
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*buf++ = 0x83;
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*buf++ = 0xc0 | (5 << 3) | 4;
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/* Pushed size must be divisible by 8. */
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SLJIT_ASSERT(!(pushed_size & 0x7));
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if (pushed_size & 0x8) {
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*buf++ = 5 * sizeof(sljit_w);
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local_size -= 5 * sizeof(sljit_w);
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} else {
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*buf++ = 4 * sizeof(sljit_w);
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local_size -= 4 * sizeof(sljit_w);
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}
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FAIL_IF(emit_load_imm64(compiler, SLJIT_TEMPORARY_REG1, local_size));
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FAIL_IF(sljit_emit_ijump(compiler, SLJIT_CALL1, SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_touch_stack)));
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}
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#else
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compiler->local_size = local_size;
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if (local_size > 0) {
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#endif
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/* In case of Win64, local_size is always > 4 * sizeof(sljit_w) */
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if (local_size <= 127) {
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buf = (sljit_ub*)ensure_buf(compiler, 1 + 4);
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FAIL_IF(!buf);
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INC_SIZE(4);
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*buf++ = REX_W;
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*buf++ = 0x83;
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*buf++ = 0xc0 | (5 << 3) | 4;
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*buf++ = local_size;
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}
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else {
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buf = (sljit_ub*)ensure_buf(compiler, 1 + 7);
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FAIL_IF(!buf);
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INC_SIZE(7);
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*buf++ = REX_W;
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*buf++ = 0x81;
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*buf++ = 0xc0 | (5 << 3) | 4;
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*(sljit_hw*)buf = local_size;
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buf += sizeof(sljit_hw);
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}
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#ifndef _WIN64
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}
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#endif
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#ifdef _WIN64
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if (compiler->has_locals) {
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buf = (sljit_ub*)ensure_buf(compiler, 1 + 5);
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FAIL_IF(!buf);
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INC_SIZE(5);
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*buf++ = REX_W | REX_R;
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*buf++ = 0x8d;
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*buf++ = 0x40 | (reg_lmap[SLJIT_LOCALS_REG] << 3) | 0x4;
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*buf++ = 0x24;
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*buf = 4 * sizeof(sljit_w);
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}
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#endif
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/* Mov arguments to general registers. */
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return SLJIT_SUCCESS;
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}
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SLJIT_API_FUNC_ATTRIBUTE void sljit_set_context(struct sljit_compiler *compiler, int args, int temporaries, int generals, int local_size)
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{
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int pushed_size;
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CHECK_ERROR_VOID();
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check_sljit_set_context(compiler, args, temporaries, generals, local_size);
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compiler->temporaries = temporaries;
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compiler->generals = generals;
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/* Including the return address saved by the call instruction. */
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pushed_size = (generals + 1) * sizeof(sljit_w);
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#ifdef _WIN64
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compiler->has_locals = local_size > 0;
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if (local_size > 0)
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pushed_size += sizeof(sljit_w);
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if (temporaries >= 5)
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pushed_size += sizeof(sljit_w);
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#endif
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compiler->local_size = ((local_size + pushed_size + 16 - 1) & ~(16 - 1)) - pushed_size;
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#ifdef _WIN64
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compiler->local_size += 4 * sizeof(sljit_w);
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#endif
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}
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SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
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{
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| 302 |
int size;
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sljit_ub *buf;
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| 304 |
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CHECK_ERROR();
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check_sljit_emit_return(compiler, src, srcw);
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compiler->flags_saved = 0;
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if (src != SLJIT_UNUSED && src != SLJIT_RETURN_REG) {
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compiler->mode32 = 0;
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FAIL_IF(emit_mov(compiler, SLJIT_RETURN_REG, 0, src, srcw));
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}
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if (compiler->local_size > 0) {
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| 316 |
if (compiler->local_size <= 127) {
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| 317 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 4);
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FAIL_IF(!buf);
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| 319 |
INC_SIZE(4);
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| 320 |
*buf++ = REX_W;
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| 321 |
*buf++ = 0x83;
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| 322 |
*buf++ = 0xc0 | (0 << 3) | 4;
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*buf = compiler->local_size;
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| 324 |
}
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| 325 |
else {
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| 326 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 7);
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FAIL_IF(!buf);
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| 328 |
INC_SIZE(7);
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| 329 |
*buf++ = REX_W;
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| 330 |
*buf++ = 0x81;
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| 331 |
*buf++ = 0xc0 | (0 << 3) | 4;
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*(sljit_hw*)buf = compiler->local_size;
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}
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| 334 |
}
|
| 335 |
|
| 336 |
size = 1 + compiler->generals;
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| 337 |
#ifndef _WIN64
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| 338 |
if (compiler->generals >= 2)
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size += compiler->generals - 1;
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| 340 |
#else
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| 341 |
if (compiler->has_locals)
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| 342 |
size += 2;
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| 343 |
if (compiler->generals >= 4)
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| 344 |
size += compiler->generals - 3;
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| 345 |
if (compiler->temporaries >= 5)
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| 346 |
size += (5 - 4) * 2;
|
| 347 |
#endif
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| 348 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + size);
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| 349 |
FAIL_IF(!buf);
|
| 350 |
|
| 351 |
INC_SIZE(size);
|
| 352 |
|
| 353 |
#ifdef _WIN64
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| 354 |
if (compiler->has_locals) {
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| 355 |
*buf++ = REX_B;
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| 356 |
POP_REG(reg_lmap[SLJIT_LOCALS_REG]);
|
| 357 |
}
|
| 358 |
if (compiler->temporaries >= 5) {
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| 359 |
*buf++ = REX_B;
|
| 360 |
POP_REG(reg_lmap[SLJIT_TEMPORARY_EREG2]);
|
| 361 |
}
|
| 362 |
#endif
|
| 363 |
if (compiler->generals >= 1)
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| 364 |
POP_REG(reg_map[SLJIT_GENERAL_REG1]);
|
| 365 |
if (compiler->generals >= 2) {
|
| 366 |
#ifndef _WIN64
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| 367 |
*buf++ = REX_B;
|
| 368 |
#endif
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| 369 |
POP_REG(reg_lmap[SLJIT_GENERAL_REG2]);
|
| 370 |
}
|
| 371 |
if (compiler->generals >= 3) {
|
| 372 |
#ifndef _WIN64
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| 373 |
*buf++ = REX_B;
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| 374 |
#endif
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| 375 |
POP_REG(reg_lmap[SLJIT_GENERAL_REG3]);
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| 376 |
}
|
| 377 |
if (compiler->generals >= 4) {
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| 378 |
*buf++ = REX_B;
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| 379 |
POP_REG(reg_lmap[SLJIT_GENERAL_EREG1]);
|
| 380 |
}
|
| 381 |
if (compiler->generals >= 5) {
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| 382 |
*buf++ = REX_B;
|
| 383 |
POP_REG(reg_lmap[SLJIT_GENERAL_EREG2]);
|
| 384 |
}
|
| 385 |
|
| 386 |
RET();
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| 387 |
return SLJIT_SUCCESS;
|
| 388 |
}
|
| 389 |
|
| 390 |
/* --------------------------------------------------------------------- */
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| 391 |
/* Operators */
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| 392 |
/* --------------------------------------------------------------------- */
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| 393 |
|
| 394 |
static int emit_do_imm32(struct sljit_compiler *compiler, sljit_ub rex, sljit_ub opcode, sljit_w imm)
|
| 395 |
{
|
| 396 |
sljit_ub *buf;
|
| 397 |
|
| 398 |
if (rex != 0) {
|
| 399 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + sizeof(sljit_hw));
|
| 400 |
FAIL_IF(!buf);
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| 401 |
INC_SIZE(2 + sizeof(sljit_hw));
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| 402 |
*buf++ = rex;
|
| 403 |
*buf++ = opcode;
|
| 404 |
*(sljit_hw*)buf = imm;
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| 405 |
}
|
| 406 |
else {
|
| 407 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + sizeof(sljit_hw));
|
| 408 |
FAIL_IF(!buf);
|
| 409 |
INC_SIZE(1 + sizeof(sljit_hw));
|
| 410 |
*buf++ = opcode;
|
| 411 |
*(sljit_hw*)buf = imm;
|
| 412 |
}
|
| 413 |
return SLJIT_SUCCESS;
|
| 414 |
}
|
| 415 |
|
| 416 |
static sljit_ub* emit_x86_instruction(struct sljit_compiler *compiler, int size,
|
| 417 |
/* The register or immediate operand. */
|
| 418 |
int a, sljit_w imma,
|
| 419 |
/* The general operand (not immediate). */
|
| 420 |
int b, sljit_w immb)
|
| 421 |
{
|
| 422 |
sljit_ub *buf;
|
| 423 |
sljit_ub *buf_ptr;
|
| 424 |
sljit_ub rex = 0;
|
| 425 |
int flags = size & ~0xf;
|
| 426 |
int inst_size;
|
| 427 |
|
| 428 |
/* The immediate operand must be 32 bit. */
|
| 429 |
SLJIT_ASSERT(!(a & SLJIT_IMM) || compiler->mode32 || IS_HALFWORD(imma));
|
| 430 |
/* Both cannot be switched on. */
|
| 431 |
SLJIT_ASSERT((flags & (EX86_BIN_INS | EX86_SHIFT_INS)) != (EX86_BIN_INS | EX86_SHIFT_INS));
|
| 432 |
/* Size flags not allowed for typed instructions. */
|
| 433 |
SLJIT_ASSERT(!(flags & (EX86_BIN_INS | EX86_SHIFT_INS)) || (flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) == 0);
|
| 434 |
/* Both size flags cannot be switched on. */
|
| 435 |
SLJIT_ASSERT((flags & (EX86_BYTE_ARG | EX86_HALF_ARG)) != (EX86_BYTE_ARG | EX86_HALF_ARG));
|
| 436 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 437 |
/* SSE2 and immediate is not possible. */
|
| 438 |
SLJIT_ASSERT(!(a & SLJIT_IMM) || !(flags & EX86_SSE2));
|
| 439 |
#endif
|
| 440 |
|
| 441 |
size &= 0xf;
|
| 442 |
inst_size = size;
|
| 443 |
|
| 444 |
if ((b & SLJIT_MEM) && !(b & 0xf0) && NOT_HALFWORD(immb)) {
|
| 445 |
if (emit_load_imm64(compiler, TMP_REG3, immb))
|
| 446 |
return NULL;
|
| 447 |
immb = 0;
|
| 448 |
if (b & 0xf)
|
| 449 |
b |= TMP_REG3 << 4;
|
| 450 |
else
|
| 451 |
b |= TMP_REG3;
|
| 452 |
}
|
| 453 |
|
| 454 |
if (!compiler->mode32 && !(flags & EX86_NO_REXW))
|
| 455 |
rex |= REX_W;
|
| 456 |
else if (flags & EX86_REX)
|
| 457 |
rex |= REX;
|
| 458 |
|
| 459 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 460 |
if (flags & EX86_PREF_F2)
|
| 461 |
inst_size++;
|
| 462 |
#endif
|
| 463 |
if (flags & EX86_PREF_66)
|
| 464 |
inst_size++;
|
| 465 |
|
| 466 |
/* Calculate size of b. */
|
| 467 |
inst_size += 1; /* mod r/m byte. */
|
| 468 |
if (b & SLJIT_MEM) {
|
| 469 |
if ((b & 0x0f) == SLJIT_UNUSED)
|
| 470 |
inst_size += 1 + sizeof(sljit_hw); /* SIB byte required to avoid RIP based addressing. */
|
| 471 |
else {
|
| 472 |
if (reg_map[b & 0x0f] >= 8)
|
| 473 |
rex |= REX_B;
|
| 474 |
if (immb != 0 && !(b & 0xf0)) {
|
| 475 |
/* Immediate operand. */
|
| 476 |
if (immb <= 127 && immb >= -128)
|
| 477 |
inst_size += sizeof(sljit_b);
|
| 478 |
else
|
| 479 |
inst_size += sizeof(sljit_hw);
|
| 480 |
}
|
| 481 |
}
|
| 482 |
|
| 483 |
#ifndef _WIN64
|
| 484 |
if ((b & 0xf) == SLJIT_LOCALS_REG && (b & 0xf0) == 0)
|
| 485 |
b |= SLJIT_LOCALS_REG << 4;
|
| 486 |
#endif
|
| 487 |
|
| 488 |
if ((b & 0xf0) != SLJIT_UNUSED) {
|
| 489 |
inst_size += 1; /* SIB byte. */
|
| 490 |
if (reg_map[(b >> 4) & 0x0f] >= 8)
|
| 491 |
rex |= REX_X;
|
| 492 |
}
|
| 493 |
}
|
| 494 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 495 |
else if (!(flags & EX86_SSE2) && reg_map[b] >= 8)
|
| 496 |
rex |= REX_B;
|
| 497 |
#else
|
| 498 |
else if (reg_map[b] >= 8)
|
| 499 |
rex |= REX_B;
|
| 500 |
#endif
|
| 501 |
|
| 502 |
if (a & SLJIT_IMM) {
|
| 503 |
if (flags & EX86_BIN_INS) {
|
| 504 |
if (imma <= 127 && imma >= -128) {
|
| 505 |
inst_size += 1;
|
| 506 |
flags |= EX86_BYTE_ARG;
|
| 507 |
} else
|
| 508 |
inst_size += 4;
|
| 509 |
}
|
| 510 |
else if (flags & EX86_SHIFT_INS) {
|
| 511 |
imma &= compiler->mode32 ? 0x1f : 0x3f;
|
| 512 |
if (imma != 1) {
|
| 513 |
inst_size ++;
|
| 514 |
flags |= EX86_BYTE_ARG;
|
| 515 |
}
|
| 516 |
} else if (flags & EX86_BYTE_ARG)
|
| 517 |
inst_size++;
|
| 518 |
else if (flags & EX86_HALF_ARG)
|
| 519 |
inst_size += sizeof(short);
|
| 520 |
else
|
| 521 |
inst_size += sizeof(sljit_hw);
|
| 522 |
}
|
| 523 |
else {
|
| 524 |
SLJIT_ASSERT(!(flags & EX86_SHIFT_INS) || a == SLJIT_PREF_SHIFT_REG);
|
| 525 |
/* reg_map[SLJIT_PREF_SHIFT_REG] is less than 8. */
|
| 526 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 527 |
if (!(flags & EX86_SSE2) && reg_map[a] >= 8)
|
| 528 |
rex |= REX_R;
|
| 529 |
#else
|
| 530 |
if (reg_map[a] >= 8)
|
| 531 |
rex |= REX_R;
|
| 532 |
#endif
|
| 533 |
}
|
| 534 |
|
| 535 |
if (rex)
|
| 536 |
inst_size++;
|
| 537 |
|
| 538 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + inst_size);
|
| 539 |
PTR_FAIL_IF(!buf);
|
| 540 |
|
| 541 |
/* Encoding the byte. */
|
| 542 |
INC_SIZE(inst_size);
|
| 543 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 544 |
if (flags & EX86_PREF_F2)
|
| 545 |
*buf++ = 0xf2;
|
| 546 |
#endif
|
| 547 |
if (flags & EX86_PREF_66)
|
| 548 |
*buf++ = 0x66;
|
| 549 |
if (rex)
|
| 550 |
*buf++ = rex;
|
| 551 |
buf_ptr = buf + size;
|
| 552 |
|
| 553 |
/* Encode mod/rm byte. */
|
| 554 |
if (!(flags & EX86_SHIFT_INS)) {
|
| 555 |
if ((flags & EX86_BIN_INS) && (a & SLJIT_IMM))
|
| 556 |
*buf = (flags & EX86_BYTE_ARG) ? 0x83 : 0x81;
|
| 557 |
|
| 558 |
if ((a & SLJIT_IMM) || (a == 0))
|
| 559 |
*buf_ptr = 0;
|
| 560 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 561 |
else if (!(flags & EX86_SSE2))
|
| 562 |
*buf_ptr = reg_lmap[a] << 3;
|
| 563 |
else
|
| 564 |
*buf_ptr = a << 3;
|
| 565 |
#else
|
| 566 |
else
|
| 567 |
*buf_ptr = reg_lmap[a] << 3;
|
| 568 |
#endif
|
| 569 |
}
|
| 570 |
else {
|
| 571 |
if (a & SLJIT_IMM) {
|
| 572 |
if (imma == 1)
|
| 573 |
*buf = 0xd1;
|
| 574 |
else
|
| 575 |
*buf = 0xc1;
|
| 576 |
} else
|
| 577 |
*buf = 0xd3;
|
| 578 |
*buf_ptr = 0;
|
| 579 |
}
|
| 580 |
|
| 581 |
if (!(b & SLJIT_MEM))
|
| 582 |
#if (defined SLJIT_SSE2 && SLJIT_SSE2)
|
| 583 |
*buf_ptr++ |= 0xc0 + ((!(flags & EX86_SSE2)) ? reg_lmap[b] : b);
|
| 584 |
#else
|
| 585 |
*buf_ptr++ |= 0xc0 + reg_lmap[b];
|
| 586 |
#endif
|
| 587 |
else if ((b & 0x0f) != SLJIT_UNUSED) {
|
| 588 |
#ifdef _WIN64
|
| 589 |
SLJIT_ASSERT((b & 0xf0) != (SLJIT_LOCALS_REG << 4));
|
| 590 |
#endif
|
| 591 |
if ((b & 0xf0) == SLJIT_UNUSED || (b & 0xf0) == (SLJIT_LOCALS_REG << 4)) {
|
| 592 |
if (immb != 0) {
|
| 593 |
if (immb <= 127 && immb >= -128)
|
| 594 |
*buf_ptr |= 0x40;
|
| 595 |
else
|
| 596 |
*buf_ptr |= 0x80;
|
| 597 |
}
|
| 598 |
|
| 599 |
if ((b & 0xf0) == SLJIT_UNUSED)
|
| 600 |
*buf_ptr++ |= reg_lmap[b & 0x0f];
|
| 601 |
else {
|
| 602 |
*buf_ptr++ |= 0x04;
|
| 603 |
*buf_ptr++ = reg_lmap[b & 0x0f] | (reg_lmap[(b >> 4) & 0x0f] << 3);
|
| 604 |
}
|
| 605 |
|
| 606 |
if (immb != 0) {
|
| 607 |
if (immb <= 127 && immb >= -128)
|
| 608 |
*buf_ptr++ = immb; /* 8 bit displacement. */
|
| 609 |
else {
|
| 610 |
*(sljit_hw*)buf_ptr = immb; /* 32 bit displacement. */
|
| 611 |
buf_ptr += sizeof(sljit_hw);
|
| 612 |
}
|
| 613 |
}
|
| 614 |
}
|
| 615 |
else {
|
| 616 |
*buf_ptr++ |= 0x04;
|
| 617 |
*buf_ptr++ = reg_lmap[b & 0x0f] | (reg_lmap[(b >> 4) & 0x0f] << 3) | (immb << 6);
|
| 618 |
}
|
| 619 |
}
|
| 620 |
else {
|
| 621 |
*buf_ptr++ |= 0x04;
|
| 622 |
*buf_ptr++ = 0x25;
|
| 623 |
*(sljit_hw*)buf_ptr = immb; /* 32 bit displacement. */
|
| 624 |
buf_ptr += sizeof(sljit_hw);
|
| 625 |
}
|
| 626 |
|
| 627 |
if (a & SLJIT_IMM) {
|
| 628 |
if (flags & EX86_BYTE_ARG)
|
| 629 |
*buf_ptr = imma;
|
| 630 |
else if (flags & EX86_HALF_ARG)
|
| 631 |
*(short*)buf_ptr = imma;
|
| 632 |
else if (!(flags & EX86_SHIFT_INS))
|
| 633 |
*(sljit_hw*)buf_ptr = imma;
|
| 634 |
}
|
| 635 |
|
| 636 |
return !(flags & EX86_SHIFT_INS) ? buf : (buf + 1);
|
| 637 |
}
|
| 638 |
|
| 639 |
/* --------------------------------------------------------------------- */
|
| 640 |
/* Call / return instructions */
|
| 641 |
/* --------------------------------------------------------------------- */
|
| 642 |
|
| 643 |
static SLJIT_INLINE int call_with_args(struct sljit_compiler *compiler, int type)
|
| 644 |
{
|
| 645 |
sljit_ub *buf;
|
| 646 |
|
| 647 |
#ifndef _WIN64
|
| 648 |
SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_REG2] == 6 && reg_map[SLJIT_TEMPORARY_REG1] < 8 && reg_map[SLJIT_TEMPORARY_REG3] < 8, args_registers);
|
| 649 |
|
| 650 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6));
|
| 651 |
FAIL_IF(!buf);
|
| 652 |
INC_SIZE((type < SLJIT_CALL3) ? 3 : 6);
|
| 653 |
if (type >= SLJIT_CALL3) {
|
| 654 |
*buf++ = REX_W;
|
| 655 |
*buf++ = 0x8b;
|
| 656 |
*buf++ = 0xc0 | (0x2 << 3) | reg_lmap[SLJIT_TEMPORARY_REG3];
|
| 657 |
}
|
| 658 |
*buf++ = REX_W;
|
| 659 |
*buf++ = 0x8b;
|
| 660 |
*buf++ = 0xc0 | (0x7 << 3) | reg_lmap[SLJIT_TEMPORARY_REG1];
|
| 661 |
#else
|
| 662 |
SLJIT_COMPILE_ASSERT(reg_map[SLJIT_TEMPORARY_REG2] == 2 && reg_map[SLJIT_TEMPORARY_REG1] < 8 && reg_map[SLJIT_TEMPORARY_REG3] < 8, args_registers);
|
| 663 |
|
| 664 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + ((type < SLJIT_CALL3) ? 3 : 6));
|
| 665 |
FAIL_IF(!buf);
|
| 666 |
INC_SIZE((type < SLJIT_CALL3) ? 3 : 6);
|
| 667 |
if (type >= SLJIT_CALL3) {
|
| 668 |
*buf++ = REX_W | REX_R;
|
| 669 |
*buf++ = 0x8b;
|
| 670 |
*buf++ = 0xc0 | (0x0 << 3) | reg_lmap[SLJIT_TEMPORARY_REG3];
|
| 671 |
}
|
| 672 |
*buf++ = REX_W;
|
| 673 |
*buf++ = 0x8b;
|
| 674 |
*buf++ = 0xc0 | (0x1 << 3) | reg_lmap[SLJIT_TEMPORARY_REG1];
|
| 675 |
#endif
|
| 676 |
return SLJIT_SUCCESS;
|
| 677 |
}
|
| 678 |
|
| 679 |
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)
|
| 680 |
{
|
| 681 |
sljit_ub *buf;
|
| 682 |
|
| 683 |
CHECK_ERROR();
|
| 684 |
check_sljit_emit_fast_enter(compiler, dst, dstw, args, temporaries, generals, local_size);
|
| 685 |
|
| 686 |
compiler->temporaries = temporaries;
|
| 687 |
compiler->generals = generals;
|
| 688 |
compiler->local_size = (local_size + sizeof(sljit_uw) - 1) & ~(sizeof(sljit_uw) - 1);
|
| 689 |
#ifdef _WIN64
|
| 690 |
compiler->local_size += 4 * sizeof(sljit_w);
|
| 691 |
#endif
|
| 692 |
|
| 693 |
/* For UNUSED dst. Uncommon, but possible. */
|
| 694 |
if (dst == SLJIT_UNUSED)
|
| 695 |
dst = TMP_REGISTER;
|
| 696 |
|
| 697 |
if (dst >= SLJIT_TEMPORARY_REG1 && dst <= TMP_REGISTER) {
|
| 698 |
if (reg_map[dst] < 8) {
|
| 699 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
|
| 700 |
FAIL_IF(!buf);
|
| 701 |
|
| 702 |
INC_SIZE(1);
|
| 703 |
POP_REG(reg_lmap[dst]);
|
| 704 |
}
|
| 705 |
else {
|
| 706 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 2);
|
| 707 |
FAIL_IF(!buf);
|
| 708 |
|
| 709 |
INC_SIZE(2);
|
| 710 |
*buf++ = REX_B;
|
| 711 |
POP_REG(reg_lmap[dst]);
|
| 712 |
}
|
| 713 |
}
|
| 714 |
else if (dst & SLJIT_MEM) {
|
| 715 |
#if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
|
| 716 |
/* REX_W is not necessary (src is not immediate). */
|
| 717 |
compiler->mode32 = 1;
|
| 718 |
#endif
|
| 719 |
buf = emit_x86_instruction(compiler, 1, 0, 0, dst, dstw);
|
| 720 |
FAIL_IF(!buf);
|
| 721 |
*buf++ = 0x8f;
|
| 722 |
}
|
| 723 |
return SLJIT_SUCCESS;
|
| 724 |
}
|
| 725 |
|
| 726 |
SLJIT_API_FUNC_ATTRIBUTE int sljit_emit_fast_return(struct sljit_compiler *compiler, int src, sljit_w srcw)
|
| 727 |
{
|
| 728 |
sljit_ub *buf;
|
| 729 |
|
| 730 |
CHECK_ERROR();
|
| 731 |
check_sljit_emit_fast_return(compiler, src, srcw);
|
| 732 |
|
| 733 |
CHECK_EXTRA_REGS(src, srcw, (void)0);
|
| 734 |
|
| 735 |
if ((src & SLJIT_IMM) && NOT_HALFWORD(srcw)) {
|
| 736 |
FAIL_IF(emit_load_imm64(compiler, TMP_REGISTER, srcw));
|
| 737 |
src = TMP_REGISTER;
|
| 738 |
}
|
| 739 |
|
| 740 |
if (src >= SLJIT_TEMPORARY_REG1 && src <= TMP_REGISTER) {
|
| 741 |
if (reg_map[src] < 8) {
|
| 742 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 1 + 1);
|
| 743 |
FAIL_IF(!buf);
|
| 744 |
|
| 745 |
INC_SIZE(1 + 1);
|
| 746 |
PUSH_REG(reg_lmap[src]);
|
| 747 |
}
|
| 748 |
else {
|
| 749 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 2 + 1);
|
| 750 |
FAIL_IF(!buf);
|
| 751 |
|
| 752 |
INC_SIZE(2 + 1);
|
| 753 |
*buf++ = REX_B;
|
| 754 |
PUSH_REG(reg_lmap[src]);
|
| 755 |
}
|
| 756 |
}
|
| 757 |
else if (src & SLJIT_MEM) {
|
| 758 |
#if (defined SLJIT_CONFIG_X86_64 && SLJIT_CONFIG_X86_64)
|
| 759 |
/* REX_W is not necessary (src is not immediate). */
|
| 760 |
compiler->mode32 = 1;
|
| 761 |
#endif
|
| 762 |
buf = emit_x86_instruction(compiler, 1, 0, 0, src, srcw);
|
| 763 |
FAIL_IF(!buf);
|
| 764 |
*buf++ = 0xff;
|
| 765 |
*buf |= 6 << 3;
|
| 766 |
|
| 767 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 1);
|
| 768 |
FAIL_IF(!buf);
|
| 769 |
INC_SIZE(1);
|
| 770 |
}
|
| 771 |
else {
|
| 772 |
SLJIT_ASSERT(IS_HALFWORD(srcw));
|
| 773 |
/* SLJIT_IMM. */
|
| 774 |
buf = (sljit_ub*)ensure_buf(compiler, 1 + 5 + 1);
|
| 775 |
FAIL_IF(!buf);
|
| 776 |
|
| 777 |
INC_SIZE(5 + 1);
|
| 778 |
*buf++ = 0x68;
|
| 779 |
*(sljit_hw*)buf = srcw;
|
| 780 |
buf += sizeof(sljit_hw);
|
| 781 |
}
|
| 782 |
|
| 783 |
RET();
|
| 784 |
return SLJIT_SUCCESS;
|
| 785 |
}
|
| 786 |
|
| 787 |
|
| 788 |
/* --------------------------------------------------------------------- */
|
| 789 |
/* Extend input */
|
| 790 |
/* --------------------------------------------------------------------- */
|
| 791 |
|
| 792 |
static int emit_mov_int(struct sljit_compiler *compiler, int sign,
|
| 793 |
int dst, sljit_w dstw,
|
| 794 |
int src, sljit_w srcw)
|
| 795 |
{
|
| 796 |
sljit_ub* code;
|
| 797 |
int dst_r;
|
| 798 |
|
| 799 |
compiler->mode32 = 0;
|
| 800 |
|
| 801 |
if (dst == SLJIT_UNUSED && !(src & SLJIT_MEM))
|
| 802 |
return SLJIT_SUCCESS; /* Empty instruction. */
|
| 803 |
|
| 804 |
if (src & SLJIT_IMM) {
|
| 805 |
if (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_NO_REGISTERS)
|
| 806 |
return emit_load_imm64(compiler, dst, srcw);
|
| 807 |
compiler->mode32 = 1;
|
| 808 |
code = emit_x86_instruction(compiler, 1, SLJIT_IMM, (sljit_w)(int)srcw, dst, dstw);
|
| 809 |
FAIL_IF(!code);
|
| 810 |
*code = 0xc7;
|
| 811 |
compiler->mode32 = 0;
|
| 812 |
return SLJIT_SUCCESS;
|
| 813 |
}
|
| 814 |
|
| 815 |
dst_r = (dst >= SLJIT_TEMPORARY_REG1 && dst <= SLJIT_GENERAL_REG3) ? dst : TMP_REGISTER;
|
| 816 |
|
| 817 |
if ((dst & SLJIT_MEM) && (src >= SLJIT_TEMPORARY_REG1 && src <= SLJIT_GENERAL_REG3))
|
| 818 |
dst_r = src;
|
| 819 |
else {
|
| 820 |
if (sign) {
|
| 821 |
code = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw);
|
| 822 |
FAIL_IF(!code);
|
| 823 |
*code++ = 0x63;
|
| 824 |
} else if (dst_r == src) {
|
| 825 |
compiler->mode32 = 0;
|
| 826 |
code = emit_x86_instruction(compiler, 1 | EX86_SHIFT_INS, SLJIT_IMM, 32, dst, 0);
|
| 827 |
FAIL_IF(!code);
|
| 828 |
*code |= 0x4 << 3;
|
| 829 |
code = emit_x86_instruction(compiler, 1 | EX86_SHIFT_INS, SLJIT_IMM, 32, dst, 0);
|
| 830 |
FAIL_IF(!code);
|
| 831 |
*code |= 0x7 << 3;
|
| 832 |
} else {
|
| 833 |
/* xor reg, reg. */
|
| 834 |
code = emit_x86_instruction(compiler, 1, dst_r, 0, dst_r, 0);
|
| 835 |
FAIL_IF(!code);
|
| 836 |
*code++ = 0x33;
|
| 837 |
compiler->mode32 = 1;
|
| 838 |
code = emit_x86_instruction(compiler, 1, dst_r, 0, src, srcw);
|
| 839 |
FAIL_IF(!code);
|
| 840 |
*code++ = 0x8b;
|
| 841 |
compiler->mode32 = 0;
|
| 842 |
}
|
| 843 |
}
|
| 844 |
|
| 845 |
if (dst & SLJIT_MEM) {
|
| 846 |
compiler->mode32 = 1;
|
| 847 |
code = emit_x86_instruction(compiler, 1, dst_r, 0, dst, dstw);
|
| 848 |
FAIL_IF(!code);
|
| 849 |
*code = 0x89;
|
| 850 |
compiler->mode32 = 0;
|
| 851 |
}
|
| 852 |
|
| 853 |
return SLJIT_SUCCESS;
|
| 854 |
}
|
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