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powerpc: Fix fsqrt build in libm [BZ#16576]
Some powerpc64 processors (e5500 core for instance) does not provide the fsqrt instruction, however current check to use in math_private.h is __WORDSIZE and _ARCH_PWR4 (ISA 2.02). This is patch change it to use the compiler flag _ARCH_PPCSQ (which is the same condition GCC uses to decide whether to generate fsqrt instruction). It fixes BZ#16576.
This commit is contained in:
Adhemerval Zanella
parent
5fe8e35975
commit
08cee2a464
17
ChangeLog
17
ChangeLog
@ -1,3 +1,20 @@
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2015-01-28 Adhemerval Zanellla <azanella@linux.vnet.ibm.com>
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[BZ #16576]
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* sysdeps/powerpc/fpu/math_private.h [__CPU_HAS_FSQRT]: Remove define
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and use _ARCH_PPCSQ instead.
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(__ieee754_sqrt): Likewise.
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(__ieee754_sqrtf): Likewise.
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* sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Build only if
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_ARCH_PPCSQ is defined.
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(__ieee754_sqrt): Use _ARCH_PPCSQ to select wheter to use hardware
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fsqrt instruction.
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* sysdeps/powerpc/fpu/e_sqrtf.c (__ieee754_sqrtf): Build only if
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_ARCH_PPCSQ is defined.
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(__ieee754_sqrtf): Use _ARCH_PPCSQ to select wheter to use hardware
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fsqrts instruction.
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* sysdeps/powerpc/powerpc64/fpu/e_sqrt.c: Remove file.
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2015-01-27 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
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* iconv/loop.c: Suppress array out of bound warning caused by GCC
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18
NEWS
18
NEWS
@ -10,15 +10,15 @@ Version 2.21
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* The following bugs are resolved with this release:
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6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
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15215, 15378, 15884, 16009, 16418, 16191, 16469, 16617, 16619, 16657,
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16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370, 17371, 17411,
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17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555, 17570, 17571,
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17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589, 17594, 17601,
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17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647, 17653, 17657,
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17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719, 17722, 17723,
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17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747, 17748, 17775,
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17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797, 17803, 17806,
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17834, 17844, 17848, 17868, 17869, 17870
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15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16619,
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16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370, 17371,
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17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555, 17570,
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17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589, 17594,
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17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647, 17653,
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17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719, 17722,
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17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747, 17748,
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17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797, 17803,
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17806, 17834, 17844, 17848, 17868, 17869, 17870
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* A new semaphore algorithm has been implemented in generic C code for all
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machines. Previous custom assembly implementations of semaphore were
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@ -24,6 +24,7 @@
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#include <sysdep.h>
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#include <ldsodefs.h>
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#ifndef _ARCH_PPCSQ
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static const double almost_half = 0.5000000000000001; /* 0.5 + 2^-53 */
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static const ieee_float_shape_type a_nan = {.word = 0x7fc00000 };
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static const ieee_float_shape_type a_inf = {.word = 0x7f800000 };
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@ -152,6 +153,7 @@ __slow_ieee754_sqrt (double x)
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}
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return f_wash (x);
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}
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#endif /* _ARCH_PPCSQ */
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#undef __ieee754_sqrt
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double
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@ -159,16 +161,11 @@ __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 (" fsqrt %0,%1\n"
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:"=f" (z):"f" (x));
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}
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else
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z = __slow_ieee754_sqrt (x);
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#ifdef _ARCH_PPCSQ
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asm ("fsqrt %0,%1\n" :"=f" (z):"f" (x));
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#else
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z = __slow_ieee754_sqrt (x);
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#endif
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return z;
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}
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@ -24,6 +24,7 @@
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#include <sysdep.h>
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#include <ldsodefs.h>
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#ifndef _ARCH_PPCSQ
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static const float almost_half = 0.50000006; /* 0.5 + 2^-24 */
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static const ieee_float_shape_type a_nan = {.word = 0x7fc00000 };
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static const ieee_float_shape_type a_inf = {.word = 0x7f800000 };
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@ -128,6 +129,7 @@ __slow_ieee754_sqrtf (float x)
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}
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return f_washf (x);
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}
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#endif /* _ARCH_PPCSQ */
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#undef __ieee754_sqrtf
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float
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@ -135,16 +137,11 @@ __ieee754_sqrtf (float 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 (" fsqrts %0,%1\n"
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:"=f" (z):"f" (x));
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}
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else
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z = __slow_ieee754_sqrtf (x);
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#ifdef _ARCH_PPCSQ
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asm ("fsqrts %0,%1\n" :"=f" (z):"f" (x));
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#else
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z = __slow_ieee754_sqrtf (x);
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#endif
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return z;
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}
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@ -25,26 +25,17 @@
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#include <fenv_private.h>
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#include_next <math_private.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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extern double __slow_ieee754_sqrt (double);
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extern __always_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 (__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 ("fsqrt %0,%1" : "=f" (__z) : "f" (__x));
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}
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else
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__z = __slow_ieee754_sqrt(__x);
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#ifdef _ARCH_PPCSQ
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asm ("fsqrt %0,%1" : "=f" (__z) : "f" (__x));
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#else
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__z = __slow_ieee754_sqrt(__x);
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#endif
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return __z;
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}
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@ -55,14 +46,11 @@ __ieee754_sqrtf (float __x)
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{
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float __z;
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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 ("fsqrts %0,%1" : "=f" (__z) : "f" (__x));
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}
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else
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__z = __slow_ieee754_sqrtf(__x);
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#ifdef _ARCH_PPCSQ
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asm ("fsqrts %0,%1" : "=f" (__z) : "f" (__x));
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#else
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__z = __slow_ieee754_sqrtf(__x);
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#endif
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return __z;
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}
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@ -1,30 +0,0 @@
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/* Double-precision floating point square root.
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Copyright (C) 1997-2015 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, see
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<http://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <math_private.h>
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#undef __ieee754_sqrt
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double
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__ieee754_sqrt (double x)
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{
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double z;
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__asm __volatile ("fsqrt %0,%1" : "=f" (z) : "f" (x));
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return z;
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}
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strong_alias (__ieee754_sqrt, __sqrt_finite)
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@ -1,30 +0,0 @@
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/* Single-precision floating point square root.
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Copyright (C) 1997-2015 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, see
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<http://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <math_private.h>
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#undef __ieee754_sqrtf
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float
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__ieee754_sqrtf (float x)
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{
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double z;
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__asm ("fsqrts %0,%1" : "=f" (z) : "f" (x));
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return z;
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}
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strong_alias (__ieee754_sqrtf, __sqrtf_finite)
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