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/* Inline math functions for x86-64. Copyright (C) 2002-2004, 2007, 2009, 2011 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 modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _MATH_H # error "Never use <bits/mathinline.h> directly; include <math.h> instead." #endif #include <bits/wordsize.h> #ifndef __extern_always_inline # define __MATH_INLINE __inline #else # define __MATH_INLINE __extern_always_inline #endif #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2 /* Test for negative number. Used in the signbit() macro. */ __MATH_INLINE int __NTH (__signbitf (float __x)) { # if __WORDSIZE == 32 __extension__ union { float __f; int __i; } __u = { __f: __x }; return __u.__i < 0; # else int __m; __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x)); return __m & 0x8; # endif } __MATH_INLINE int __NTH (__signbit (double __x)) { # if __WORDSIZE == 32 __extension__ union { double __d; int __i[2]; } __u = { __d: __x }; return __u.__i[1] < 0; # else int __m; __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x)); return __m & 0x80; # endif } __MATH_INLINE int __NTH (__signbitl (long double __x)) { __extension__ union { long double __l; int __i[3]; } __u = { __l: __x }; return (__u.__i[2] & 0x8000) != 0; } #ifdef __USE_ISOC99 __BEGIN_NAMESPACE_C99 /* Round to nearest integer. */ # if __WORDSIZE == 64 || defined __SSE_MATH__ __MATH_INLINE long int __NTH (lrintf (float __x)) { long int __res; __asm ("cvtss2si %1, %0" : "=r" (__res) : "xm" (__x)); return __res; } # endif # if __WORDSIZE == 64 || defined __SSE2_MATH__ __MATH_INLINE long int __NTH (lrint (double __x)) { long int __res; __asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x)); return __res; } # endif # if __WORDSIZE == 64 __MATH_INLINE long long int __NTH (llrintf (float __x)) { long long int __res; __asm ("cvtss2si %1, %0" : "=r" (__res) : "xm" (__x)); return __res; } __MATH_INLINE long long int __NTH (llrint (double __x)) { long long int __res; __asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x)); return __res; } # endif # if __FINITE_MATH_ONLY__ == 1 && (__WORDSIZE == 64 || defined __SSE2_MATH__) /* Determine maximum of two values. */ __MATH_INLINE float __NTH (fmaxf (float __x, float __y)) { __asm ("maxss %1, %0" : "+x" (__x) : "xm" (__y)); return __x; } __MATH_INLINE double __NTH (fmax (double __x, double __y)) { __asm ("maxsd %1, %0" : "+x" (__x) : "xm" (__y)); return __x; } /* Determine minimum of two values. */ __MATH_INLINE float __NTH (fminf (float __x, float __y)) { __asm ("minss %1, %0" : "+x" (__x) : "xm" (__y)); return __x; } __MATH_INLINE double __NTH (fmin (double __x, double __y)) { __asm ("minsd %1, %0" : "+x" (__x) : "xm" (__y)); return __x; } # endif __END_NAMESPACE_C99 # endif #endif
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