From 0b4bfefd6fcacf4ecad50568ee1cdc7d67765918 Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Sat, 27 Jul 2024 03:33:26 -0500
Subject: [PATCH] nak/nir: Preserve rounding modes in split_64bit_conversions()

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30402>
---
 .../compiler/nak_nir_split_64bit_conversions.c       | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/nouveau/compiler/nak_nir_split_64bit_conversions.c b/src/nouveau/compiler/nak_nir_split_64bit_conversions.c
index 812b1c82089..4d40f8e82ea 100644
--- a/src/nouveau/compiler/nak_nir_split_64bit_conversions.c
+++ b/src/nouveau/compiler/nak_nir_split_64bit_conversions.c
@@ -26,6 +26,16 @@
 #include "nak_private.h"
 #include "nir_builder.h"
 
+static nir_rounding_mode
+op_rounding_mode(nir_op op)
+{
+   switch (op) {
+   case nir_op_f2f16_rtne: return nir_rounding_mode_rtne;
+   case nir_op_f2f16_rtz: return nir_rounding_mode_rtz;
+   default: return nir_rounding_mode_undef;
+   }
+}
+
 static bool
 split_64bit_conversion(nir_builder *b, nir_instr *instr, UNUSED void *_data)
 {
@@ -80,7 +90,7 @@ split_64bit_conversion(nir_builder *b, nir_instr *instr, UNUSED void *_data)
    nir_def *tmp = nir_type_convert(b, src, src_type, tmp_type,
                                    nir_rounding_mode_undef);
    nir_def *res = nir_type_convert(b, tmp, tmp_type, dst_full_type,
-                                   nir_rounding_mode_undef);
+                                   op_rounding_mode(alu->op));
    nir_def_replace(&alu->def, res);
 
    return true;