From 5269c6d4221bc840b1831273c7788be69e275ddd Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Thu, 9 Apr 2026 17:41:18 +0200
Subject: [PATCH] zink/ntv: seperate float control2 exact bits

Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40872>
---
 .../drivers/zink/nir_to_spirv/nir_to_spirv.c   | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
index 5cb18a7c933..4d5d9b6b025 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
@@ -2310,13 +2310,17 @@ emit_alu(struct ntv_context *ctx, nir_alu_instr *alu)
       if (!nir_alu_instr_is_nan_preserve(alu))
          fp_mode |= SpvFPFastMathModeNotNaNMask;
 
-      if (!nir_alu_instr_is_exact(alu)) {
-         fp_mode |=
-            SpvFPFastMathModeAllowRecipMask |
-            SpvFPFastMathModeAllowContractMask |
-            SpvFPFastMathModeAllowReassocMask |
-            SpvFPFastMathModeAllowTransformMask;
-      }
+      if (!nir_alu_instr_no_contract(alu))
+         fp_mode |= SpvFPFastMathModeAllowContractMask;
+
+      if (!nir_alu_instr_no_reassoc(alu))
+         fp_mode |= SpvFPFastMathModeAllowReassocMask;
+
+      if (!nir_alu_instr_no_transform(alu))
+         fp_mode |= SpvFPFastMathModeAllowTransformMask;
+
+      /* Vulkan always allows rcp anyway. */
+      fp_mode |= SpvFPFastMathModeAllowRecipMask;
 
       if (fp_mode != default_fp_mode)
          spirv_builder_emit_fp_fast_math_mode(&ctx->builder, result, fp_mode);