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authorUlrich Drepper <drepper@gmail.com>2010-10-19 12:56:42 -0400
committerUlrich Drepper <drepper@gmail.com>2010-10-19 12:56:42 -0400
commit18edac4857531b4b034eef37a07e3b03117de2bf (patch)
tree76ab66c435d997cdcb07a559e3c7e313945436bf /sysdeps/x86_64
parentd20501241ea423e477b357d93147530987e0d89e (diff)
downloadglibc-18edac4857531b4b034eef37a07e3b03117de2bf.tar.gz
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Provide FP_FAST_FMA{,F,L} definitions for x86/x86-64.
Diffstat (limited to 'sysdeps/x86_64')
-rw-r--r--sysdeps/x86_64/bits/mathdef.h16
1 files changed, 15 insertions, 1 deletions
diff --git a/sysdeps/x86_64/bits/mathdef.h b/sysdeps/x86_64/bits/mathdef.h
index 7b16189590..91463921b1 100644
--- a/sysdeps/x86_64/bits/mathdef.h
+++ b/sysdeps/x86_64/bits/mathdef.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2004, 2010 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -45,4 +45,18 @@ typedef long double double_t;	/* `double' expressions are evaluated as
 # define FP_ILOGB0	(-2147483647 - 1)
 # define FP_ILOGBNAN	(-2147483647 - 1)
 
+/* The GCC 4.6 compiler will define __FP_FAST_FMA{,F,L} if the fma{,f,l}
+   builtins are supported.  */
+# if __FP_FAST_FMA
+#  define FP_FAST_FMA 1
+# endif
+
+# if __FP_FAST_FMAF
+#  define FP_FAST_FMAF 1
+# endif
+
+# if __FP_FAST_FMAL
+#  define FP_FAST_FMAL 1
+# endif
+
 #endif	/* ISO C99 */