From 77ef4fa9078b56c3fcaded3a618cf95fe21e66d4 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 31 Aug 2019 17:06:00 -0300
Subject: shader/shift: Implement SHR wrapped and clamped variants

Nvidia defaults to wrapped shifts, but this is undefined behaviour on
OpenGL's spec. Explicitly mask/clamp according to what the guest shader
requires.
---
 src/video_core/engines/shader_bytecode.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/video_core/engines')

diff --git a/src/video_core/engines/shader_bytecode.h b/src/video_core/engines/shader_bytecode.h
index c3678b9ea..bd8c1ada0 100644
--- a/src/video_core/engines/shader_bytecode.h
+++ b/src/video_core/engines/shader_bytecode.h
@@ -674,6 +674,10 @@ union Instruction {
         BitField<48, 1, u64> is_signed;
     } shift;
 
+    union {
+        BitField<39, 1, u64> wrap;
+    } shr;
+
     union {
         BitField<39, 5, u64> shift_amount;
         BitField<48, 1, u64> negate_b;
-- 
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