From 5bfd1547d210a75e5b46a53056b8560a98e9874f Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Mon, 10 Mar 2025 13:29:13 +0100
Subject: [PATCH] aco: don't assume that v_interp_mov_f32 flushes denorms

Foz-DB Navi21:
Totals from 3 (0.00% of 79789) affected shaders:
Instrs: 1708 -> 1722 (+0.82%)
CodeSize: 9416 -> 9460 (+0.47%)
Latency: 12094 -> 12371 (+2.29%); split: -0.02%, +2.31%
InvThroughput: 1967 -> 1992 (+1.27%)
Copies: 105 -> 106 (+0.95%)
PreVGPRs: 131 -> 132 (+0.76%)
VALU: 1155 -> 1169 (+1.21%)

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33974>
---
 src/amd/compiler/aco_optimizer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/amd/compiler/aco_optimizer.cpp b/src/amd/compiler/aco_optimizer.cpp
index 43d8835a29c..0f4b0ea097a 100644
--- a/src/amd/compiler/aco_optimizer.cpp
+++ b/src/amd/compiler/aco_optimizer.cpp
@@ -1651,7 +1651,7 @@ label_instruction(opt_ctx& ctx, aco_ptr<Instruction>& instr)
       return;
    }
 
-   if (instr->isVALU() || instr->isVINTRP()) {
+   if (instr->isVALU() || (instr->isVINTRP() && instr->opcode != aco_opcode::v_interp_mov_f32)) {
       if (instr_info.can_use_output_modifiers[(int)instr->opcode] || instr->isVINTRP() ||
           instr->opcode == aco_opcode::v_cndmask_b32) {
          bool canonicalized = true;