From 2aa6b04fd96b27479e39f6401de130d57ea53562 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 9 Jul 2018 13:31:34 +0200
Subject: [PATCH] [dxvk] Fix tzcnt return value when source value is 0

---
 src/util/util_bit.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/util/util_bit.h b/src/util/util_bit.h
index e600fb20..23b8cc65 100644
--- a/src/util/util_bit.h
+++ b/src/util/util_bit.h
@@ -29,8 +29,8 @@ namespace dxvk::bit {
     uint32_t res;
     uint32_t tmp;
     asm (
-      "xor %1, %1;"
-      "bsf %2, %0;"
+      "mov  $32, %1;"
+      "bsf   %2, %0;"
       "cmovz %1, %0;"
       : "=&r" (res), "=&r" (tmp)
       : "r" (n));