| /* Private inline math functions for powerpc. |
| Copyright (C) 2006 |
| 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., 51 Franklin St - Fifth Floor, Boston, |
| MA 02110-1301 USA */ |
| |
| #ifndef _PPC_MATH_PRIVATE_H_ |
| #define _PPC_MATH_PRIVATE_H_ |
| |
| #include <sysdep.h> |
| #include <ldsodefs.h> |
| #include <dl-procinfo.h> |
| |
| # if __WORDSIZE == 64 || defined _ARCH_PWR4 |
| # define __CPU_HAS_FSQRT 1 |
| # else |
| # define __CPU_HAS_FSQRT ((GLRO(dl_hwcap) & PPC_FEATURE_64) != 0) |
| # endif |
| |
| # ifndef __LIBC_INTERNAL_MATH_INLINES |
| extern double __slow_ieee754_sqrt (double); |
| __inline double |
| __ieee754_sqrt (double __x) |
| { |
| double __z; |
| |
| /* If the CPU is 64-bit we can use the optional FP instructions. */ |
| if (__CPU_HAS_FSQRT) |
| { |
| /* Volatile is required to prevent the compiler from moving the |
| fsqrt instruction above the branch. */ |
| __asm __volatile ( |
| " fsqrt %0,%1\n" |
| : "=f" (__z) |
| : "f" (__x)); |
| } |
| else |
| __z = __slow_ieee754_sqrt(__x); |
| |
| return __z; |
| } |
| |
| extern float __slow_ieee754_sqrtf (float); |
| |
| __inline float |
| __ieee754_sqrtf (float __x) |
| { |
| float __z; |
| |
| /* If the CPU is 64-bit we can use the optional FP instructions. */ |
| if (__CPU_HAS_FSQRT) |
| { |
| /* Volatile is required to prevent the compiler from moving the |
| fsqrts instruction above the branch. */ |
| __asm __volatile ( |
| " fsqrts %0,%1\n" |
| : "=f" (__z) |
| : "f" (__x)); |
| } |
| else |
| __z = __slow_ieee754_sqrtf(__x); |
| |
| return __z; |
| } |
| #endif /* __LIBC_INTERNAL_MATH_INLINES */ |
| |
| #include <math/math_private.h> |
| |
| #endif /* _PPC_MATH_PRIVATE_H_ */ |