Mesa (master): util: Use LONG_MAX instead of LONG_BIT.

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: 1eaa29cb300e927409281ef0a9413072766eaa3d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1eaa29cb300e927409281ef0a9413072766eaa3d

Author: Jose Fonseca <jfonseca at vmware.com>
Date:   Sun Aug  9 22:36:37 2015 +0100

util: Use LONG_MAX instead of LONG_BIT.

More portable.  Based on Roland Scheidegger's idea.

Tested with roundevent_test on Linux, MinGW, and MSVC.

https://bugs.freedesktop.org/show_bug.cgi?id=91591

Reviewed-by: Roland Scheidegger <sroland at vmware.com>
Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/util/rounding.h |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/util/rounding.h b/src/util/rounding.h
index 868e1b4..7b5608b 100644
--- a/src/util/rounding.h
+++ b/src/util/rounding.h
@@ -28,6 +28,7 @@
 
 #include <math.h>
 #include <limits.h>
+#include <stdint.h>
 
 #ifdef __x86_64__
 #include <xmmintrin.h>
@@ -96,12 +97,12 @@ static inline long
 _mesa_lroundevenf(float x)
 {
 #ifdef __x86_64__
-#if LONG_BIT == 64
+#if LONG_MAX == INT64_MAX
    return _mm_cvtss_si64(_mm_load_ss(&x));
-#elif LONG_BIT == 32 || defined(_WIN32)
+#elif LONG_MAX == INT32_MAX
    return _mm_cvtss_si32(_mm_load_ss(&x));
 #else
-#error "Unsupported or undefined LONG_BIT"
+#error "Unsupported long size"
 #endif
 #else
    return lrintf(x);
@@ -116,12 +117,12 @@ static inline long
 _mesa_lroundeven(double x)
 {
 #ifdef __x86_64__
-#if LONG_BIT == 64
+#if LONG_MAX == INT64_MAX
    return _mm_cvtsd_si64(_mm_load_sd(&x));
-#elif LONG_BIT == 32 || defined(_WIN32)
+#elif LONG_MAX == INT32_MAX
    return _mm_cvtsd_si32(_mm_load_sd(&x));
 #else
-#error "Unsupported or undefined LONG_BIT"
+#error "Unsupported long size"
 #endif
 #else
    return lrint(x);