From 5020403c703c5fea571b1989fd3a004dbe76e74c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Thu, 23 Jul 2020 00:13:35 -0400
Subject: [PATCH] glsl: don't lower atomic functions to mediump

Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6073>
---
 src/compiler/glsl/lower_precision.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/lower_precision.cpp b/src/compiler/glsl/lower_precision.cpp
index dcf6329..97a91f8 100644
--- a/src/compiler/glsl/lower_precision.cpp
+++ b/src/compiler/glsl/lower_precision.cpp
@@ -506,7 +506,9 @@ is_lowerable_builtin(ir_call *ir,
         */
        !strcmp(ir->callee_name(), "packHalf2x16") ||
        !strcmp(ir->callee_name(), "packUnorm4x8") ||
-       !strcmp(ir->callee_name(), "packSnorm4x8"))
+       !strcmp(ir->callee_name(), "packSnorm4x8") ||
+       /* Atomic functions are not lowered. */
+       strstr(ir->callee_name(), "atomic") == ir->callee_name())
       return false;
 
    assert(ir->callee->return_precision == GLSL_PRECISION_NONE);
-- 
2.7.4