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nak/sm20: Call copy_alu_src_if_fabs() first

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Since an FAbs or FNegAbs modifier is going to force the source out to a
register no matter what, we should do this first.  That way we avoid the
unnecessary source swaps or other evictions when we have to evict the
source anyway because it has a modifier.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34675>
This commit is contained in:
Faith Ekstrand 2025-04-21 17:53:24 -05:00 • committed by Marge Bot
parent c26273109f
commit ca296bf0a9
1 changed files with 4 additions and 4 deletions
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8
src/nouveau/compiler/nak/sm20.rs
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@ -585,11 +585,11 @@ impl SM20Op for OpFFma {
fn legalize(&mut self, b: &mut LegalizeBuilder) {
use RegFile::GPR;
let [src0, src1, src2] = &mut self.srcs;
swap_srcs_if_not_reg(src0, src1, GPR);
b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F32);
b.copy_alu_src_if_fabs(src0, GPR, SrcType::F32);
b.copy_alu_src_if_fabs(src1, GPR, SrcType::F32);
b.copy_alu_src_if_fabs(src2, GPR, SrcType::F32);
swap_srcs_if_not_reg(src0, src1, GPR);
b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F32);
if src1.as_imm_not_f20().is_some()
&& (self.saturate
|| self.rnd_mode != FRndMode::NearestEven
@ -680,10 +680,10 @@ impl SM20Op for OpFMul {
fn legalize(&mut self, b: &mut LegalizeBuilder) {
use RegFile::GPR;
let [src0, src1] = &mut self.srcs;
swap_srcs_if_not_reg(src0, src1, GPR);
b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F32);
b.copy_alu_src_if_fabs(src0, GPR, SrcType::F32);
b.copy_alu_src_if_fabs(src1, GPR, SrcType::F32);
swap_srcs_if_not_reg(src0, src1, GPR);
b.copy_alu_src_if_not_reg(src0, GPR, SrcType::F32);
if src1.as_imm_not_f20().is_some()
&& self.rnd_mode != FRndMode::NearestEven
{