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x64: Fix codegen for the select instruction with v128 (#4317)

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This commit fixes a bug in the previous codegen for the `select`
instruction when the operations of the `select` were of the `v128` type.
Previously teh `XmmCmove` instruction only stored an `OperandSize` of 32
or 64 for a 64 or 32-bit move, but this was also used for these 128-bit
types which meant that when used the wrong move instruction was
generated. The fix applied here is to store the whole `Type` being moved
so the 128-bit variant can be selected as well.
This commit is contained in:
Alex Crichton
2022-06-27 13:02:40 -05:00
committed by GitHub
parent 23ae9016af
commit 8bb07523e2
5 changed files with 49 additions and 28 deletions
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25
cranelift/codegen/src/isa/x64/inst/mod.rs
View File

@@ -617,14 +617,14 @@ impl Inst {
}
}
pub(crate) fn xmm_cmove(size: OperandSize, cc: CC, src: RegMem, dst: Writable<Reg>) -> Inst {
debug_assert!(size.is_one_of(&[OperandSize::Size32, OperandSize::Size64]));
pub(crate) fn xmm_cmove(ty: Type, cc: CC, src: RegMem, dst: Writable<Reg>) -> Inst {
debug_assert!(ty == types::F32 || ty == types::F64 || ty.is_vector());
src.assert_regclass_is(RegClass::Float);
debug_assert!(dst.to_reg().class() == RegClass::Float);
let src = XmmMem::new(src).unwrap();
let dst = WritableXmm::from_writable_reg(dst).unwrap();
Inst::XmmCmove {
size,
ty,
cc,
consequent: src,
alternative: dst.to_reg(),
@@ -1507,23 +1507,26 @@ impl PrettyPrint for Inst {
}
Inst::XmmCmove {
size,
ty,
cc,
consequent,
alternative,
dst,
..
} => {
let alternative = pretty_print_reg(alternative.to_reg(), size.to_bytes(), allocs);
let dst = pretty_print_reg(dst.to_reg().to_reg(), size.to_bytes(), allocs);
let consequent = consequent.pretty_print(size.to_bytes(), allocs);
let size = u8::try_from(ty.bytes()).unwrap();
let alternative = pretty_print_reg(alternative.to_reg(), size, allocs);
let dst = pretty_print_reg(dst.to_reg().to_reg(), size, allocs);
let consequent = consequent.pretty_print(size, allocs);
format!(
"mov {}, {}; j{} $next; mov{} {}, {}; $next: ",
cc.invert().to_string(),
if *size == OperandSize::Size64 {
"sd"
} else {
"ss"
match *ty {
types::F64 => "sd",
types::F32 => "ss",
types::F32X4 => "aps",
types::F64X2 => "apd",
_ => "dqa",
},
consequent,
dst,