mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
PowerPC: modf optimization
This patch implements modf/modff optimization for POWER by focus on FP operations instead of relying in integer ones.
This commit is contained in:
parent
ff491d14a2
commit
3c0265394d
12
ChangeLog
12
ChangeLog
@ -1,3 +1,15 @@
|
||||
2013-04-23 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
|
||||
|
||||
* sysdeps/powerpc/power5/fpu/s_modf.c: New file: modf optimization for
|
||||
POWER.
|
||||
* sysdeps/powerpc/power5/fpu/s_modff.c: New file: modff optimization
|
||||
for POWER.
|
||||
* sysdeps/powerpc/powerpc64/power5/Implies: Add powerpc/power5 and
|
||||
powerpc/power5/fpu folders.
|
||||
* sysdeps/powerpc/powerpc32/power5/Implies: Likewise.
|
||||
* benchtests/Makefile: Add modf testcase.
|
||||
* benchtests/bench-modf.c: New file: Benchmark test for mo
|
||||
|
||||
2013-04-23 Siddhesh Poyarekar <siddhesh@redhat.com>
|
||||
|
||||
[BZ #14888]
|
||||
|
@ -45,7 +45,7 @@
|
||||
# See pow-inputs for an example.
|
||||
|
||||
subdir := benchtests
|
||||
bench := exp pow rint sin cos tan atan \
|
||||
bench := exp pow rint sin cos tan atan modf \
|
||||
slowexp slowpow slowsin slowcos slowtan slowatan
|
||||
|
||||
# exp function fast path
|
||||
|
39
benchtests/bench-modf.c
Normal file
39
benchtests/bench-modf.c
Normal file
@ -0,0 +1,39 @@
|
||||
/* Copyright (C) 2013 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
extern double modf (double, double *);
|
||||
|
||||
#define CALL_BENCH_FUNC(j, i) modf ( in[j].arg0, &i);
|
||||
|
||||
struct args
|
||||
{
|
||||
double arg0;
|
||||
} in[] =
|
||||
{
|
||||
{ 42.42 },
|
||||
{ -42.42 }
|
||||
};
|
||||
|
||||
#define NUM_SAMPLES (sizeof (in) / sizeof (struct args))
|
||||
|
||||
static volatile double ret = 0.0;
|
||||
#define BENCH_FUNC(j) ({double iptr; ret = CALL_BENCH_FUNC (j, iptr);})
|
||||
|
||||
#define ITER 250000000
|
||||
#define FUNCNAME "modf"
|
||||
|
||||
#include "bench-skeleton.c"
|
58
sysdeps/powerpc/power5/fpu/s_modf.c
Normal file
58
sysdeps/powerpc/power5/fpu/s_modf.c
Normal file
@ -0,0 +1,58 @@
|
||||
/* Copyright (C) 2013 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 Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 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
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <math.h>
|
||||
#include <math_private.h>
|
||||
#include <math_ldbl_opt.h>
|
||||
|
||||
double
|
||||
__modf (double x, double *iptr)
|
||||
{
|
||||
if (__builtin_isinf (x))
|
||||
{
|
||||
*iptr = x;
|
||||
return __copysign (0.0, x);
|
||||
}
|
||||
else if (__builtin_isnan (x))
|
||||
{
|
||||
*iptr = NAN;
|
||||
return NAN;
|
||||
}
|
||||
|
||||
if (x >= 0.0)
|
||||
{
|
||||
*iptr = __floor (x);
|
||||
return (x - *iptr);
|
||||
}
|
||||
else
|
||||
{
|
||||
*iptr = __ceil (x);
|
||||
return (x - *iptr);
|
||||
}
|
||||
}
|
||||
weak_alias (__modf, modf)
|
||||
#ifdef NO_LONG_DOUBLE
|
||||
strong_alias (__modf, __modfl)
|
||||
weak_alias (__modf, modfl)
|
||||
#endif
|
||||
#ifdef IS_IN_libm
|
||||
# if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
|
||||
compat_symbol (libm, __modf, modfl, GLIBC_2_0);
|
||||
# endif
|
||||
#elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
|
||||
compat_symbol (libc, __modf, modfl, GLIBC_2_0);
|
||||
#endif
|
46
sysdeps/powerpc/power5/fpu/s_modff.c
Normal file
46
sysdeps/powerpc/power5/fpu/s_modff.c
Normal file
@ -0,0 +1,46 @@
|
||||
/* Copyright (C) 2013 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 Library General Public License as
|
||||
published by the Free Software Foundation; either version 2 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
|
||||
Library General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Library General Public
|
||||
License along with the GNU C Library; see the file COPYING.LIB. If
|
||||
not, see <http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <math.h>
|
||||
#include <math_private.h>
|
||||
|
||||
float
|
||||
__modff (float x, float *iptr)
|
||||
{
|
||||
if (__builtin_isinff (x))
|
||||
{
|
||||
*iptr = x;
|
||||
return __copysignf (0.0, x);
|
||||
}
|
||||
else if (__builtin_isnanf (x))
|
||||
{
|
||||
*iptr = NAN;
|
||||
return NAN;
|
||||
}
|
||||
|
||||
if (x >= 0.0)
|
||||
{
|
||||
*iptr = __floorf (x);
|
||||
return (x - *iptr);
|
||||
}
|
||||
else
|
||||
{
|
||||
*iptr = __ceilf (x);
|
||||
return (x - *iptr);
|
||||
}
|
||||
}
|
||||
weak_alias (__modff, modff)
|
@ -1,2 +1,4 @@
|
||||
powerpc/power5/fpu
|
||||
powerpc/power5
|
||||
powerpc/powerpc32/power4/fpu
|
||||
powerpc/powerpc32/power4
|
||||
|
@ -1,2 +1,4 @@
|
||||
powerpc/power5/fpu
|
||||
powerpc/power5
|
||||
powerpc/powerpc64/power4/fpu
|
||||
powerpc/powerpc64/power4
|
||||
|
Loading…
Reference in New Issue
Block a user