+2009-08-24 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/x86_64/fpu/bits/mathinline.h (__signbit): Optimize.
+ (__signbitf): Likewise.
+
2009-08-23 Ulrich Drepper <drepper@redhat.com>
* posix/regcomp.c (parse_dup_op): Verify the expression is correctly
/* Inline math functions for x86-64.
- Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 2002.
__MATH_INLINE int
__NTH (__signbitf (float __x))
{
- __extension__ union { float __f; int __i; } __u = { __f: __x };
- return __u.__i < 0;
+ int __m;
+ asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
+ return __m & 0x8;
}
__MATH_INLINE int
__NTH (__signbit (double __x))
{
- __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
- return __u.__i[1] < 0;
+ int __m;
+ asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
+ return __m & 0x80;
}
__MATH_INLINE int
__NTH (__signbitl (long double __x))