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-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 7b16189..9146392 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 */