gcc actually generates this for us now that we use -fno-math-errno
(which is weird, since lrintf()/lrint() don't set errno) but clang still
does not. Presumably helps MSVC as well.
Reduced .text size by 8.5k with gcc before -fno-math-errno.
text data bss dec hex filename
4935850 195136 26192 5157178 4eb13a i965_dri.so before
4927225 195128 26192 5148545 4e8f81 i965_dri.so after
---
src/util/rounding.h | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/util/rounding.h b/src/util/rounding.h
index 088cf86..b0c9918 100644
--- a/src/util/rounding.h
+++ b/src/util/rounding.h
@@ -25,6 +25,12 @@
#define _ROUNDING_H
#include <math.h>
+#include <limits.h>
+
+#ifdef __x86_64__
+#include <xmmintrin.h>
+#include <emmintrin.h>
+#endif
#ifdef __SSE4_1__
#include <smmintrin.h>
@@ -87,7 +93,15 @@ _mesa_roundeven(double x)
static inline long
_mesa_lroundevenf(float x)
{
+#ifdef __x86_64__
+#if LONG_BIT == 64
+ return _mm_cvtss_si64(_mm_load_ss(&x));
+#elif LONG_BIT == 32
+ return _mm_cvtss_si32(_mm_load_ss(&x));
+#endif
+#else
return lrintf(x);
+#endif
}
/**
@@ -97,7 +111,15 @@ _mesa_lroundevenf(float x)
static inline long
_mesa_lroundeven(double x)
{
+#ifdef __x86_64__
+#if LONG_BIT == 64
+ return _mm_cvtsd_si64(_mm_load_sd(&x));
+#elif LONG_BIT == 32
+ return _mm_cvtsd_si32(_mm_load_sd(&x));
+#endif
+#else
return lrint(x);
+#endif
}
#endif
--
2.3.6
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