fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-06 05:08:08 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

nir/builder: use amul over ishl on agx

Browse source 
ishl can wrap, amul cannot. so we need amul in the backend, or otherwise we
would need to introduce an ashl opcode instead. that doesn't seem better.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31964>
This commit is contained in:
Alyssa Rosenzweig 2024-11-04 10:23:48 -04:00
parent 9ab8d70fa6
commit 1f3c97547a
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/compiler/nir/nir_builder.h
View file

@ -974,6 +974,8 @@ _nir_mul_imm(nir_builder *build, nir_def *x, uint64_t y, bool amul)
return x;
} else if ((!build->shader->options ||
!build->shader->options->lower_bitops) &&
!(amul && (!build->shader->options ||
build->shader->options->has_amul)) &&
util_is_power_of_two_or_zero64(y)) {
return nir_ishl(build, x, nir_imm_int(build, ffsll(y) - 1));
} else if (amul) {