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84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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/* Private inline math functions for powerpc.
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Copyright (C) 2006
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston,
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MA 02110-1301 USA */
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#ifndef _PPC_MATH_PRIVATE_H_
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#define _PPC_MATH_PRIVATE_H_
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#include <sysdep.h>
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#include <ldsodefs.h>
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#include <dl-procinfo.h>
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# if __WORDSIZE == 64 || defined _ARCH_PWR4
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# define __CPU_HAS_FSQRT 1
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# else
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# define __CPU_HAS_FSQRT ((GLRO(dl_hwcap) & PPC_FEATURE_64) != 0)
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# endif
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# ifndef __LIBC_INTERNAL_MATH_INLINES
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extern double __slow_ieee754_sqrt (double);
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__inline double
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__ieee754_sqrt (double __x)
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{
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double __z;
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/* If the CPU is 64-bit we can use the optional FP instructions. */
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if (__CPU_HAS_FSQRT)
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{
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/* Volatile is required to prevent the compiler from moving the
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fsqrt instruction above the branch. */
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__asm __volatile (
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" fsqrt %0,%1\n"
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: "=f" (__z)
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: "f" (__x));
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}
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else
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__z = __slow_ieee754_sqrt(__x);
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return __z;
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}
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extern float __slow_ieee754_sqrtf (float);
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__inline float
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__ieee754_sqrtf (float __x)
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{
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float __z;
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/* If the CPU is 64-bit we can use the optional FP instructions. */
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if (__CPU_HAS_FSQRT)
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{
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/* Volatile is required to prevent the compiler from moving the
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fsqrts instruction above the branch. */
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__asm __volatile (
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" fsqrts %0,%1\n"
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: "=f" (__z)
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: "f" (__x));
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}
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else
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__z = __slow_ieee754_sqrtf(__x);
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return __z;
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}
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#endif /* __LIBC_INTERNAL_MATH_INLINES */
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#include <math/math_private.h>
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#endif /* _PPC_MATH_PRIVATE_H_ */
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