From 70ff82f72d4dfd0b296e885b0f1517d0a46e64e1 Mon Sep 17 00:00:00 2001
From: Nguyen Dac Nam <nam.kazt.91@gmail.com>
Date: Fri, 13 Mar 2020 14:20:18 +0700
Subject: [PATCH] shader_decode: BFE add ref of reverse parallel method.

---
 src/video_core/shader/decode/bfe.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/video_core/shader/decode/bfe.cpp b/src/video_core/shader/decode/bfe.cpp
index 911d536570..39587e0df9 100644
--- a/src/video_core/shader/decode/bfe.cpp
+++ b/src/video_core/shader/decode/bfe.cpp
@@ -36,6 +36,9 @@ u32 ShaderIR::DecodeBfe(NodeBlock& bb, u32 pc) {
 
     const bool is_signed = instr.bfe.is_signed;
 
+    // using reverse parallel method in
+    // https://graphics.stanford.edu/~seander/bithacks.html#ReverseParallel
+    // note for later if possible to implement faster method.
     if (instr.bfe.brev) {
         const auto swap = [&](u32 s, u32 mask) {
             Node v1 =