From: Søren Sandmann Pedersen <sandmann@redhat.com>
Date: Sun, 24 Aug 2008 03:42:36 +0000 (-0400)
Subject: Remove use of MMX extensions.
X-Git-Tag: 1.0_branch~1272
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=00841cb314a3b737dc5f492e113f36c19ba336e1;p=profile%2Fivi%2Fpixman.git

Remove use of MMX extensions.

They were never a big improvement anyway, and now that we have SSE2
support, they would only be useful on Pentium IIIs, and only if
explicitly enabled, which most distributions couldn't do anyway.
---

diff --git a/TODO b/TODO
index 94088ce..cb7d5a9 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,5 @@
   - Rename "SSE" to "MMX_EXTENSIONS"
+  - Be consistent about calling sse2 sse2
 
   - SSE 2 issues:
 
diff --git a/configure.ac b/configure.ac
index 0cf32c7..7d80145 100644
--- a/configure.ac
+++ b/configure.ac
@@ -180,45 +180,6 @@ fi
 
 AM_CONDITIONAL(USE_MMX, test $have_mmx_intrinsics = yes)
 
-dnl =======================================================
-
-dnl GCC 4.2 when compiling with -msse will generate SSE instructions
-dnl on its own.  This means anything compiled with -mss can only be
-dnl run after a runtime check for SSE.  Unfortunately, since we still
-dnl need to support MMX-but-not-SSE (such as the OLPC), this means we
-dnl can only use SSE when compiling for x86-64 (where SSE is always
-dnl supported).
-
-have_sse_intrinsics=no
-AC_MSG_CHECKING(whether to use SSE intrinsics)
-xserver_save_CFLAGS=$CFLAGS
-CFLAGS="$CFLAGS -msse $MMX_CFLAGS"
-
-AC_COMPILE_IFELSE([
-#if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
-#error "Need GCC >= 3.4 for SSE intrinsics"
-#endif
-#if !defined(__amd64__) && !defined(__x86_64__)
-#error "Need x86-64 for SSE"
-#endif
-#include <mmintrin.h>
-#include <xmmintrin.h>
-int main () {
-    __m64 v = _mm_cvtsi32_si64 (1);
-    v = _mm_shuffle_pi16 (v, _MM_SHUFFLE(3, 3, 3, 3));
-    return _mm_cvtsi64_si32 (v);
-}], have_sse_intrinsics=yes)
-CFLAGS=$xserver_save_CFLAGS
-AC_MSG_RESULT($have_sse_intrinsics)
-
-if test $have_sse_intrinsics = yes ; then
-   AC_DEFINE(USE_SSE, 1, [use SSE compiler intrinsics])
-   MMX_CFLAGS="-msse $MMX_CFLAGS"
-fi
-
-AM_CONDITIONAL(USE_SSE, test $have_sse_intrinsics = yes)
-
-
 dnl ===========================================================================
 dnl Check for SSE2
 
diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c
index 9d6eb8b..36e82b7 100644
--- a/pixman/pixman-mmx.c
+++ b/pixman/pixman-mmx.c
@@ -227,28 +227,6 @@ pix_add (__m64 a, __m64 b)
     return  _mm_adds_pu8 (a, b);
 }
 
-#ifdef USE_SSE
-
-static inline __m64
-expand_alpha (__m64 pixel)
-{
-    return _mm_shuffle_pi16 (pixel, _MM_SHUFFLE(3, 3, 3, 3));
-}
-
-static inline __m64
-expand_alpha_rev (__m64 pixel)
-{
-    return _mm_shuffle_pi16 (pixel, _MM_SHUFFLE(0, 0, 0, 0));
-}
-
-static inline __m64
-invert_colors (__m64 pixel)
-{
-    return _mm_shuffle_pi16 (pixel, _MM_SHUFFLE(3, 0, 1, 2));
-}
-
-#else
-
 static inline __m64
 expand_alpha (__m64 pixel)
 {
@@ -300,8 +278,6 @@ invert_colors (__m64 pixel)
     return x;
 }
 
-#endif
-
 static inline __m64
 over (__m64 src, __m64 srca, __m64 dest)
 {