Optimize x86-64 signbit{,f} a bit.
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@ -1,3 +1,8 @@
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2009-08-24 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/x86_64/fpu/bits/mathinline.h (__signbit): Optimize.
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(__signbitf): Likewise.
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2009-08-23 Ulrich Drepper <drepper@redhat.com>
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2009-08-23 Ulrich Drepper <drepper@redhat.com>
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* posix/regcomp.c (parse_dup_op): Verify the expression is correctly
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* posix/regcomp.c (parse_dup_op): Verify the expression is correctly
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@ -1,5 +1,5 @@
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/* Inline math functions for x86-64.
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/* Inline math functions for x86-64.
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Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
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Copyright (C) 2002, 2003, 2004, 2007, 2009 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This file is part of the GNU C Library.
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Contributed by Andreas Jaeger <aj@suse.de>, 2002.
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Contributed by Andreas Jaeger <aj@suse.de>, 2002.
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@ -35,14 +35,16 @@
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__MATH_INLINE int
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__MATH_INLINE int
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__NTH (__signbitf (float __x))
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__NTH (__signbitf (float __x))
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{
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{
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__extension__ union { float __f; int __i; } __u = { __f: __x };
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int __m;
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return __u.__i < 0;
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asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
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return __m & 0x8;
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}
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}
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__MATH_INLINE int
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__MATH_INLINE int
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__NTH (__signbit (double __x))
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__NTH (__signbit (double __x))
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{
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{
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__extension__ union { double __d; int __i[2]; } __u = { __d: __x };
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int __m;
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return __u.__i[1] < 0;
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asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
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return __m & 0x80;
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}
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}
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__MATH_INLINE int
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__MATH_INLINE int
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__NTH (__signbitl (long double __x))
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__NTH (__signbitl (long double __x))
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