As currently only GCC x86_64 builds where using it.
---
src/util/rounding.h | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/src/util/rounding.h b/src/util/rounding.h
index ec31b47..38c1c2f 100644
--- a/src/util/rounding.h
+++ b/src/util/rounding.h
@@ -27,7 +27,17 @@
#include <math.h>
#include <limits.h>
-#ifdef __x86_64__
+/* SSE2 is supported on: all x86_64 targets, on x86 targets when -msse2 is
+ * passed to GCC, and should also be enabled on all Windows builds. */
+#if defined(__x86_64__) /* gcc */ || \
+ defined(_M_X64) /* msvc */ || \
+ defined(_M_AMD64) /* msvc */ || \
+ defined(__SSE2__) /* gcc -msse2 */ || \
+ defined(_WIN32)
+#define HAVE_SSE2 1
+#endif
+
+#ifdef HAVE_SSE2
#include <xmmintrin.h>
#include <emmintrin.h>
#endif
@@ -93,7 +103,7 @@ _mesa_roundeven(double x)
static inline long
_mesa_lroundevenf(float x)
{
-#ifdef __x86_64__
+#ifdef HAVE_SSE2
#if LONG_BIT == 64
return _mm_cvtss_si64(_mm_load_ss(&x));
#elif LONG_BIT == 32 || defined(_WIN32)
@@ -113,7 +123,7 @@ _mesa_lroundevenf(float x)
static inline long
_mesa_lroundeven(double x)
{
-#ifdef __x86_64__
+#ifdef HAVE_SSE2
#if LONG_BIT == 64
return _mm_cvtsd_si64(_mm_load_sd(&x));
#elif LONG_BIT == 32 || defined(_WIN32)
--
2.1.4
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