[xine-cvs] HG: xine-lib-1.2: Added configure check for AVX assembler support

[Petri H. <phi...@us...>]

# HG changeset patch
# User Petri Hintukainen <phi...@us...>
# Date 1342467601 -10800
# Node ID 07eba8d2d5f4d92decd614190f5bcfbef6fe3fd5
# Branch  default
# Parent  3c6ac1ecded740ace7ef80f75eeddbfceb3cb3c1
Added configure check for AVX assembler support

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -448,6 +448,13 @@
                   [AC_DEFINE([ASMALIGN_1SLN], [1],
                              [define if '.align n' means alignment to (1 << n) - byte boundaries])])
 
+dnl avx instruction set support
+AC_MSG_CHECKING([for AVX assembler])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[asm("vmovaps %ymm1, %ymm0");]])],
+                  [AC_DEFINE([HAVE_AVX], [1],
+                             [define if compiler supports avx inline assembler])
+			     AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)])
+
 CC_ATTRIBUTE_ALIGNED
 
 CC_ATTRIBUTE_VISIBILITY([protected],
 --git a/src/xine-utils/memcpy.c b/src/xine-utils/memcpy.c
--- a/src/xine-utils/memcpy.c
+++ b/src/xine-utils/memcpy.c
@@ -259,6 +259,7 @@
   return retval;
 }
 
+#ifdef HAVE_AVX
 static void * avx_memcpy(void * to, const void * from, size_t len)
 {
   void *retval;
@@ -348,6 +349,7 @@
   if(len) linux_kernel_memcpy_impl(to, from, len);
   return retval;
 }
+#endif /* HAVE_AVX */
 
 static void * mmx_memcpy(void * to, const void * from, size_t len)
 {
@@ -490,7 +492,9 @@
   { "MMX ", mmx_memcpy, MM_MMX },
   { "MMXEXT", mmx2_memcpy, MM_MMXEXT },
   { "SSE", sse_memcpy, MM_MMXEXT|MM_SSE },
+# ifdef HAVE_AVX
   { "AVX", avx_memcpy, MM_ACCEL_X86_AVX },
+# endif /* HAVE_AVX */
 #endif /* ARCH_X86 */
 #if defined (ARCH_PPC) && !defined (HOST_OS_DARWIN)
   { "ppcasm", ppcasm_memcpy, 0 },
@@ -570,7 +574,10 @@
   static const char *const memcpy_methods[] = {
     "probe", "libc",
 #if (defined(ARCH_X86) || defined(ARCH_X86_64)) && !defined(_MSC_VER)
-    "kernel", "mmx", "mmxext", "sse", "avx",
+    "kernel", "mmx", "mmxext", "sse",
+# ifdef HAVE_AVX
+    "avx",
+# endif /* HAVE_AVX */
 #endif
 #if defined (ARCH_PPC) && !defined (HOST_OS_DARWIN)
     "ppcasm_memcpy", "ppcasm_cacheable_memcpy",