From f40ef3b0d9d3a3766454aec44e7de548c97aaad5 Mon Sep 17 00:00:00 2001
From: Karol Herbst <kherbst@redhat.com>
Date: Sat, 25 Apr 2026 14:36:57 +0200
Subject: [PATCH] nir: add fmul_rtz

It's needed in NVK for correctness with interpolation.

Backport-to: 26.1
Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
(cherry picked from commit 4e520f671c2eda86bdef23830dfc861dcbadafb7)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41402>
---
 .pick_status.json               | 2 +-
 src/compiler/nir/nir_opcodes.py | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/.pick_status.json b/.pick_status.json
index 3d2b0e1687d..c6cb84fdbf9 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -2594,7 +2594,7 @@
         "description": "nir: add fmul_rtz",
         "nominated": true,
         "nomination_type": 4,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null
diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index b7cf4cc4155..03cb99cc6df 100644
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -780,6 +780,10 @@ if (nir_is_rounding_mode_rtz(execution_mode, bit_size)) {
 }
 """)
 
+binop("fmul_rtz", tfloat32, _2src_commutative + inexact_associative, """
+dst = _mesa_double_to_float_rtz((double)src0 * (double)src1);
+""")
+
 binop("fmulz", tfloat32, _2src_commutative + inexact_associative, """
 if (src0 == 0.0 || src1 == 0.0)
    dst = 0.0;