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LoongArch: Hard Float Support for fmaximum_mag{f/ }, fminimum_mag{f/ }.

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Use hardware Floating-point instruction f{maxa/mina}.{s/d}, fclass.{s/d}
to implement fmaximum_mag{f/ }, fminimum_mag{f/ }.

       *  sysdeps/loongarch/fpu/s_fmaximum_mag.c: New file.
       *  sysdeps/loongarch/fpu/s_fmaximum_magf.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fminimum_mag.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fminimum_magf.c: Likewise.
This commit is contained in:
Xiaolin Tang 2022-11-07 22:08:20 +08:00 committed by caiyinyu
parent 73e35174f5
commit a10f9fb3ff
4 changed files with 160 additions and 0 deletions
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sysdeps/loongarch/fpu/s_fmaximum_mag.c Normal file
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/* fmaximum_mag(). LoongArch version.
Copyright (C) 2022 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
<https://www.gnu.org/licenses/>. */
#define NO_MATH_REDIRECT
#include <math.h>
#include <libm-alias-double.h>
#include <fpu_control.h>
double
__fmaximum_mag (double x, double y)
{
int x_cond;
int y_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
asm volatile ("fclass.d \t%0, %1" : "=f" (y_cond) : "f" (y));
if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
return x * y;
else
{
asm volatile ("fmaxa.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fmaximum_mag, fmaximum_mag)

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sysdeps/loongarch/fpu/s_fmaximum_magf.c Normal file
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/* fmaximum_magf(). LoongArch version.
Copyright (C) 2022 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
<https://www.gnu.org/licenses/>. */
#define NO_MATH_REDIRECT
#include <math.h>
#include <libm-alias-float.h>
#include <fpu_control.h>
float
__fmaximum_magf (float x, float y)
{
int x_cond;
int y_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
asm volatile ("fclass.s \t%0, %1" : "=f" (y_cond) : "f" (y));
if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
return x * y;
else
{
asm volatile ("fmaxa.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fmaximum_mag, fmaximum_mag)

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sysdeps/loongarch/fpu/s_fminimum_mag.c Normal file
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/* fminimum_mag(). LoongArch version.
Copyright (C) 2022 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
<https://www.gnu.org/licenses/>. */
#define NO_MATH_REDIRECT
#include <math.h>
#include <libm-alias-double.h>
#include <fpu_control.h>
double
__fminimum_mag (double x, double y)
{
int x_cond;
int y_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
asm volatile ("fclass.d \t%0, %1" : "=f" (y_cond) : "f" (y));
if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
return x * y;
else
{
asm volatile ("fmina.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fminimum_mag, fminimum_mag)

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sysdeps/loongarch/fpu/s_fminimum_magf.c Normal file
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/* fminimum_magf(). LoongArch version.
Copyright (C) 2022 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
<https://www.gnu.org/licenses/>. */
#define NO_MATH_REDIRECT
#include <math.h>
#include <libm-alias-float.h>
#include <fpu_control.h>
float
__fminimum_magf (float x, float y)
{
int x_cond;
int y_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
asm volatile ("fclass.s \t%0, %1" : "=f" (y_cond) : "f" (y));
if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
return x * y;
else
{
asm volatile ("fmina.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fminimum_mag, fminimum_mag)