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refactor set_reg64_help args

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satotake 2021-11-21 10:35:19 +00:00 • committed by GitHub
parent eec8ad7112
commit fe4e574cf9
1 changed files with 9 additions and 9 deletions
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18
compiler/gen_dev/src/generic64/x86_64.rs
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@ -1493,7 +1493,7 @@ fn neg_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
// helper function for `set*` instructions
#[inline(always)]
fn set_reg64_help(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg, value: u8) {
fn set_reg64_help(op_code: u8, buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
// XOR needs 3 bytes, actual SETE instruction need 3 or 4 bytes
buf.reserve(7);
@ -1501,10 +1501,10 @@ fn set_reg64_help(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg, value: u8) {
let reg_mod = reg as u8 % 8;
use X86_64GeneralReg::*;
match reg {
RAX | RCX | RDX | RBX => buf.extend(&[0x0F, value, 0xC0 + reg_mod]),
RSP | RBP | RSI | RDI => buf.extend(&[REX, 0x0F, value, 0xC0 + reg_mod]),
RAX | RCX | RDX | RBX => buf.extend(&[0x0F, op_code, 0xC0 + reg_mod]),
RSP | RBP | RSI | RDI => buf.extend(&[REX, 0x0F, op_code, 0xC0 + reg_mod]),
R8 | R9 | R10 | R11 | R12 | R13 | R14 | R15 => {
buf.extend(&[REX + 1, 0x0F, value, 0xC0 + reg_mod])
buf.extend(&[REX + 1, 0x0F, op_code, 0xC0 + reg_mod])
}
}
@ -1516,19 +1516,19 @@ fn set_reg64_help(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg, value: u8) {
/// `SETE r/m64` -> Set Byte on Condition - zero/equal (ZF=1)
#[inline(always)]
fn sete_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
set_reg64_help(buf, reg, 0x94);
set_reg64_help(0x94, buf, reg);
}
/// `SETNE r/m64` -> Set byte if not equal (ZF=0).
#[inline(always)]
fn setne_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
set_reg64_help(buf, reg, 0x95);
set_reg64_help(0x95, buf, reg);
}
/// `SETL r/m64` -> Set byte if less (SF≠ OF).
#[inline(always)]
fn setl_reg64(buf: &mut Vec<'_, u8>, reg: X86_64GeneralReg) {
set_reg64_help(buf, reg, 0x9c);
set_reg64_help(0x9c, buf, reg);
}
/// `RET` -> Near return to calling procedure.
@ -2100,7 +2100,7 @@ mod tests {
],
);
buf.clear();
set_reg64_help(&mut buf, reg, 0x94); // sete_reg64
set_reg64_help(0x94, &mut buf, reg); // sete_reg64
assert_eq!(expected, &buf[..]);
// tests for 8 bytes in the output buffer
@ -2125,7 +2125,7 @@ mod tests {
),
] {
buf.clear();
set_reg64_help(&mut buf, *reg, 0x94); // sete_reg64
set_reg64_help(0x94, &mut buf, *reg); // sete_reg64
assert_eq!(expected, &buf[..]);
}
}