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LoongArch: Hard Float Support for fmaximum{f/ }, fminimum{f/ }.

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Use hardware Floating-point instruction f{max/min}.{s/d}, fclass.{s/d}
to implement fmaximum{f/ }, fminimum{f/ }.

       *  sysdeps/loongarch/fpu/s_fmaximum.c: New file.
       *  sysdeps/loongarch/fpu/s_fmaximumf.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fminimum.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fminimumf.c: Likewise.
This commit is contained in:
Xiaolin Tang 2022-11-07 22:05:19 +08:00 committed by caiyinyu
parent 5fe2647d31
commit 1ed6c7ab2e
4 changed files with 160 additions and 0 deletions
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sysdeps/loongarch/fpu/s_fmaximum.c Normal file
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/* fmaximum(). 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 (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 ("fmax.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fmaximum, fmaximum)

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sysdeps/loongarch/fpu/s_fmaximumf.c Normal file
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/* fmaximumf(). 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
__fmaximumf (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 ("fmax.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fmaximum, fmaximum)

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sysdeps/loongarch/fpu/s_fminimum.c Normal file
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/* fminimum(). 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 (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 ("fmin.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fminimum, fminimum)

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sysdeps/loongarch/fpu/s_fminimumf.c Normal file
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/* fminimumf(). 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
__fminimumf (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 ("fmin.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fminimum, fminimum)