fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-25 15:10:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

nak: hsetp2 and dsetp are slower on Volta

Browse source 
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34127>
This commit is contained in:
Faith Ekstrand 2025-03-19 10:08:19 -05:00 • committed by Marge Bot
parent c12583fc4b
commit f8409f1892
1 changed files with 15 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
src/nouveau/compiler/nak/calc_instr_deps.rs
View file

@ -521,7 +521,12 @@ fn instr_latency(sm: u8, op: &Op, dst_idx: usize) -> u32 {
| Op::HMul2(_)
| Op::HSet2(_)
| Op::HSetP2(_)
| Op::HMnMx2(_) => (13, 14),
| Op::HMnMx2(_) => if sm == 70 {
// Volta is even slower
(13, 15)
} else {
(13, 14)
}
_ => (6, 13)
}
} else {
@ -578,8 +583,15 @@ fn waw_latency(
}
/// Predicate read-after-write latency
fn paw_latency(_sm: u8, _write: &Op, _dst_idx: usize) -> u32 {
13
fn paw_latency(sm: u8, write: &Op, _dst_idx: usize) -> u32 {
if sm == 70 {
match write {
Op::DSetP(_) | Op::HSetP2(_) => 15,
_ => 13,
}
} else {
13
}
}
fn calc_delays(f: &mut Function, sm: &dyn ShaderModel) {