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remove redundant move

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This commit is contained in:
Brendan Hansknecht 2022-02-18 16:32:48 -08:00
parent f16c0f7db5
commit c81a1c7c2c
1 changed files with 5 additions and 8 deletions
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13
compiler/gen_dev/src/generic64/x86_64.rs
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@ -1353,6 +1353,9 @@ fn mov_reg64_base64_offset32(
/// `MOVSD xmm1,xmm2` -> Move scalar double-precision floating-point value from xmm2 to xmm1 register.
#[inline(always)]
fn movsd_freg64_freg64(buf: &mut Vec<'_, u8>, dst: X86_64FloatReg, src: X86_64FloatReg) {
if dst == src {
return;
}
let dst_high = dst as u8 > 7;
let dst_mod = dst as u8 % 8;
let src_high = src as u8 > 7;
@ -2085,10 +2088,7 @@ mod tests {
let arena = bumpalo::Bump::new();
let mut buf = bumpalo::vec![in &arena];
for ((dst, src), expected) in &[
(
(X86_64FloatReg::XMM0, X86_64FloatReg::XMM0),
vec![0xF2, 0x0F, 0x10, 0xC0],
),
((X86_64FloatReg::XMM0, X86_64FloatReg::XMM0), vec![]),
(
(X86_64FloatReg::XMM0, X86_64FloatReg::XMM15),
vec![0xF2, 0x41, 0x0F, 0x10, 0xC7],
@ -2097,10 +2097,7 @@ mod tests {
(X86_64FloatReg::XMM15, X86_64FloatReg::XMM0),
vec![0xF2, 0x44, 0x0F, 0x10, 0xF8],
),
(
(X86_64FloatReg::XMM15, X86_64FloatReg::XMM15),
vec![0xF2, 0x45, 0x0F, 0x10, 0xFF],
),
((X86_64FloatReg::XMM15, X86_64FloatReg::XMM15), vec![]),
] {
buf.clear();
movsd_freg64_freg64(&mut buf, *dst, *src);