From 7f332f4087500219f7fecc76ea268bd538f58c5e Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Thu, 18 Jan 2024 15:56:16 -0600
Subject: [PATCH] nak: Enable NIR fuse_ffmaN

This improves vkpeak perf by 40-50% on the Ada GPU in my laptop.  There
are probably more optimal things we can be doing (Intel's pass is pretty
clever) but this is already an improvement.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27157>
---
 src/nouveau/compiler/nak/api.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nouveau/compiler/nak/api.rs b/src/nouveau/compiler/nak/api.rs
index 4a18faeaa14..ba74a61b7cd 100644
--- a/src/nouveau/compiler/nak/api.rs
+++ b/src/nouveau/compiler/nak/api.rs
@@ -81,6 +81,9 @@ fn nir_options(dev: &nv_device_info) -> nir_shader_compiler_options {
     let mut op: nir_shader_compiler_options = unsafe { std::mem::zeroed() };
 
     op.lower_fdiv = true;
+    op.fuse_ffma16 = true;
+    op.fuse_ffma32 = true;
+    op.fuse_ffma64 = true;
     op.lower_flrp16 = true;
     op.lower_flrp32 = true;
     op.lower_flrp64 = true;