diff options
| author | David Schleef <ds@ginger.bigkitten.com> | 2008-05-12 17:08:50 -0700 |
|---|---|---|
| committer | David Schleef <ds@ginger.bigkitten.com> | 2008-05-12 17:08:50 -0700 |
| commit | e1c2b6e84c82615200172d627d9e0214def3f141 (patch) | |
| tree | e8295c35e5b528e3c466311ec28bcffc7a43c4d0 | |
| parent | ec0d0c9de2064953a57c076751741945b0dff87c (diff) | |
Check for gcc-4.2 for intrinsics, since we need gcc to realign the
stack when higher-level libraries (this means you, mozilla) unalign
it. Fixes #11145.
| -rw-r--r-- | m4/as-intrinsics.m4 | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/m4/as-intrinsics.m4 b/m4/as-intrinsics.m4 index 9fb5829..4781ebd 100644 --- a/m4/as-intrinsics.m4 +++ b/m4/as-intrinsics.m4 @@ -43,7 +43,13 @@ AC_DEFUN([AS_SSE_INTRINSICS], save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -msse" - AC_TRY_COMPILE([#include <xmmintrin.h>], [__m128 a; a = _mm_or_ps(a,a)], [flag_ok=yes], [flag_ok=no]) + AC_TRY_COMPILE([#include <xmmintrin.h>], [ +#ifdef __GNUC_MINOR__ +#if (__GNUC__ * 1000 + __GNUC_MINOR__) < 4002 +#error GCC before 4.2 has critical bugs compiling SSE intrinsics +#endif +#endif +__m128 a; a = _mm_or_ps(a,a)], [flag_ok=yes], [flag_ok=no]) CFLAGS="$save_CFLAGS" $1="-msse" @@ -69,7 +75,13 @@ AC_DEFUN([AS_SSE2_INTRINSICS], save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -msse2" - AC_TRY_COMPILE([#include <emmintrin.h>], [__m128i a; a = _mm_setzero_si128(); a = _mm_srli_epi16(a,8)], [flag_ok=yes], [flag_ok=no]) + AC_TRY_COMPILE([#include <emmintrin.h>], [ +#ifdef __GNUC_MINOR__ +#if (__GNUC__ * 1000 + __GNUC_MINOR__) < 4002 +#error GCC before 4.2 has critical bugs compiling SSE2 intrinsics +#endif +#endif +__m128i a; a = _mm_setzero_si128(); a = _mm_srli_epi16(a,8)], [flag_ok=yes], [flag_ok=no]) CFLAGS="$save_CFLAGS" $1="-msse2" @@ -95,7 +107,13 @@ AC_DEFUN([AS_SSE3_INTRINSICS], save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -msse3" - AC_TRY_COMPILE([#include <pmmintrin.h>], [__m128 a; a = _mm_addsub_ps(a,a)], [flag_ok=yes], [flag_ok=no]) + AC_TRY_COMPILE([#include <pmmintrin.h>], [ +#ifdef __GNUC_MINOR__ +#if (__GNUC__ * 1000 + __GNUC_MINOR__) < 4002 +#error GCC before 4.2 has critical bugs compiling SSE2 intrinsics +#endif +#endif +__m128 a; a = _mm_addsub_ps(a,a)], [flag_ok=yes], [flag_ok=no]) CFLAGS="$save_CFLAGS" $1="-msse3" |