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Added code generation for JCXZ, LOOP, JE, JNE, JS, JNS, JB, JNB, JO, JNO, JP and JNP.

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This commit is contained in:
TomW 2015-04-14 20:40:40 +01:00
commit bbf0011e95
8 changed files with 485 additions and 42 deletions
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101
src/codegen_ops_x86.h
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@ -108,6 +108,18 @@ static int LOAD_REG_L(int reg)
return host_reg;
}
static int LOAD_VAR_L(uintptr_t addr)
{
int host_reg = find_host_reg();
host_reg_mapping[host_reg] = reg;
addbyte(0x8b); /*MOVL host_reg,[reg]*/
addbyte(0x05 | (host_reg << 3));
addlong((uint32_t)addr);
return host_reg;
}
static int LOAD_REG_IMM(uint32_t imm)
{
int host_reg = find_host_reg();
@ -1101,3 +1113,92 @@ static void SP_MODIFY(int off)
}
}
}
static void TEST_ZERO_JUMP_W(int host_reg, uint32_t new_pc, int taken_cycles)
{
addbyte(0x66); /*CMPW host_reg, 0*/
addbyte(0x83);
addbyte(0xc0 | 0x38 | host_reg);
addbyte(0);
addbyte(0x75); /*JNZ +*/
addbyte(10+5+(taken_cycles ? 7 : 0));
addbyte(0xC7); /*MOVL [pc], new_pc*/
addbyte(0x05);
addlong((uintptr_t)&pc);
addlong(new_pc);
if (taken_cycles)
{
addbyte(0x83); /*SUB $codegen_block_cycles, cyclcs*/
addbyte(0x2d);
addlong((uintptr_t)&cycles);
addbyte(taken_cycles);
}
addbyte(0xe9); /*JMP end*/
addlong(BLOCK_EXIT_OFFSET - (block_pos + 4));
}
static void TEST_ZERO_JUMP_L(int host_reg, uint32_t new_pc, int taken_cycles)
{
addbyte(0x83); /*CMPW host_reg, 0*/
addbyte(0xc0 | 0x38 | host_reg);
addbyte(0);
addbyte(0x75); /*JNZ +*/
addbyte(10+5+(taken_cycles ? 7 : 0));
addbyte(0xC7); /*MOVL [pc], new_pc*/
addbyte(0x05);
addlong((uintptr_t)&pc);
addlong(new_pc);
if (taken_cycles)
{
addbyte(0x83); /*SUB $codegen_block_cycles, cyclcs*/
addbyte(0x2d);
addlong((uintptr_t)&cycles);
addbyte(taken_cycles);
}
addbyte(0xe9); /*JMP end*/
addlong(BLOCK_EXIT_OFFSET - (block_pos + 4));
}
static void TEST_NONZERO_JUMP_W(int host_reg, uint32_t new_pc, int taken_cycles)
{
addbyte(0x66); /*CMPW host_reg, 0*/
addbyte(0x83);
addbyte(0xc0 | 0x38 | host_reg);
addbyte(0);
addbyte(0x74); /*JZ +*/
addbyte(10+5+(taken_cycles ? 7 : 0));
addbyte(0xC7); /*MOVL [pc], new_pc*/
addbyte(0x05);
addlong((uintptr_t)&pc);
addlong(new_pc);
if (taken_cycles)
{
addbyte(0x83); /*SUB $codegen_block_cycles, cyclcs*/
addbyte(0x2d);
addlong((uintptr_t)&cycles);
addbyte(taken_cycles);
}
addbyte(0xe9); /*JMP end*/
addlong(BLOCK_EXIT_OFFSET - (block_pos + 4));
}
static void TEST_NONZERO_JUMP_L(int host_reg, uint32_t new_pc, int taken_cycles)
{
addbyte(0x83); /*CMPW host_reg, 0*/
addbyte(0xc0 | 0x38 | host_reg);
addbyte(0);
addbyte(0x74); /*JZ +*/
addbyte(10+5+(taken_cycles ? 7 : 0));
addbyte(0xC7); /*MOVL [pc], new_pc*/
addbyte(0x05);
addlong((uintptr_t)&pc);
addlong(new_pc);
if (taken_cycles)
{
addbyte(0x83); /*SUB $codegen_block_cycles, cyclcs*/
addbyte(0x2d);
addlong((uintptr_t)&cycles);
addbyte(taken_cycles);
}
addbyte(0xe9); /*JMP end*/
addlong(BLOCK_EXIT_OFFSET - (block_pos + 4));
}