blob: c38757dca42afeff023d306027883f61a9a69ca1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
From 32e98e8ef06f0bb6ad55f9fb5858be77c03367b0 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Mon, 2 Feb 2015 17:26:49 -0800
Subject: [PATCH] gallium/util: Don't use __builtin_clrsb in util_last_bit().
Unclear circumstances lead to undefined symbols on x86.
Bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=536916
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
---
src/gallium/auxiliary/util/u_math.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 19c7343..ca6d0f1 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -561,14 +561,10 @@ util_last_bit(unsigned u)
static INLINE unsigned
util_last_bit_signed(int i)
{
-#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407) && !defined(__INTEL_COMPILER)
- return 31 - __builtin_clrsb(i);
-#else
if (i >= 0)
return util_last_bit(i);
else
return util_last_bit(~(unsigned)i);
-#endif
}
/* Destructively loop over all of the bits in a mask as in:
--
2.0.4
|
GitWeb
