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jit inc8/dec8

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This commit is contained in:
Fabian 2020-12-31 19:14:32 -06:00
parent dc7108ee00
commit 5081529b56
2 changed files with 22 additions and 2 deletions
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4
gen/x86_table.js
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@ -397,8 +397,8 @@ const encodings = [
{ opcode: 0xFC, custom: 1, },
{ opcode: 0xFD, custom: 1, },
{ opcode: 0xFE, e: 1, fixed_g: 0, },
{ opcode: 0xFE, e: 1, fixed_g: 1, },
{ opcode: 0xFE, e: 1, fixed_g: 0, custom: 1 },
{ opcode: 0xFE, e: 1, fixed_g: 1, custom: 1 },
{ opcode: 0xFF, os: 1, e: 1, fixed_g: 0, custom: 1, },
{ opcode: 0xFF, os: 1, e: 1, fixed_g: 1, custom: 1, },
{ opcode: 0xFF, os: 1, e: 1, fixed_g: 2, custom: 1, block_boundary: 1, skip: 1, },

20
src/rust/jit_instructions.rs
View file

@ -486,6 +486,23 @@ macro_rules! define_instruction_read_write_mem8(
}
);
($fn:expr, $name_mem:ident, $name_reg:ident, none) => (
pub fn $name_mem(ctx: &mut JitContext, modrm_byte: ModrmByte) {
codegen::gen_modrm_resolve(ctx, modrm_byte);
let address_local = ctx.builder.set_new_local();
codegen::gen_safe_read_write(ctx, BitSize::BYTE, &address_local, &|ref mut ctx| {
ctx.builder.call_fn1_ret($fn);
});
ctx.builder.free_local(address_local);
}
pub fn $name_reg(ctx: &mut JitContext, r1: u32) {
codegen::gen_get_reg8(ctx, r1);
ctx.builder.call_fn1_ret($fn);
codegen::gen_set_reg8(ctx, r1);
}
);
($fn:expr, $name_mem:ident, $name_reg:ident, $imm:ident) => (
pub fn $name_mem(ctx: &mut JitContext, modrm_byte: ModrmByte, imm: u32) {
codegen::gen_modrm_resolve(ctx, modrm_byte);
@ -3400,6 +3417,9 @@ pub fn instr_FD_jit(ctx: &mut JitContext) {
ctx.builder.store_aligned_i32(0);
}
define_instruction_read_write_mem8!("inc8", instr_FE_0_mem_jit, instr_FE_0_reg_jit, none);
define_instruction_read_write_mem8!("dec8", instr_FE_1_mem_jit, instr_FE_1_reg_jit, none);
define_instruction_read_write_mem16!(gen_inc16, instr16_FF_0_mem_jit, instr16_FF_0_reg_jit, none);
define_instruction_read_write_mem32!(gen_inc32, instr32_FF_0_mem_jit, instr32_FF_0_reg_jit, none);