fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-01-09 06:10:12 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

nak: Fix OpShf folding for shift >= 64

Browse source 
The checked_shr wasn't returning the correct value if .wrap was not set.
We also weren't checking this case in the unit tests so we missed it.
While we're here, get rid of a bunch of pointhess `as u64` as well.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34678>
This commit is contained in:
Faith Ekstrand 2025-04-23 10:16:03 -05:00 • committed by Marge Bot
parent fa58199166
commit d3e917ea03
2 changed files with 8 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/nouveau/compiler/nak/hw_tests.rs
View file

@ -950,7 +950,7 @@ fn test_op_shf() {
let mut a = Acorn::new();
test_foldable_op_with(op, &mut |i| {
if i == shift_idx {
a.get_uint(6) as u32
a.get_uint(7) as u32
} else {
a.get_u32()
}

13
src/nouveau/compiler/nak/ir.rs
View file

@ -4007,21 +4007,22 @@ impl Foldable for OpShf {
&& self.data_type != IntType::I64
{
if self.right {
x.checked_shr(shift).unwrap_or(0) as u64
x.checked_shr(shift).unwrap_or(0)
} else {
x.checked_shl(shift).unwrap_or(0) as u64
x.checked_shl(shift).unwrap_or(0)
}
} else if self.data_type.is_signed() {
if self.right {
(x as i64).checked_shr(shift).unwrap_or(0) as u64
let x = x as i64;
x.checked_shr(shift).unwrap_or(x >> 63) as u64
} else {
(x as i64).checked_shl(shift).unwrap_or(0) as u64
x.checked_shl(shift).unwrap_or(0)
}
} else {
if self.right {
x.checked_shr(shift).unwrap_or(0) as u64
x.checked_shr(shift).unwrap_or(0)
} else {
x.checked_shl(shift).unwrap_or(0) as u64
x.checked_shl(shift).unwrap_or(0)
}
};