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LoongArch: Optimize f{max,min}imum_num{,f} 

Following the logic of the previous commits.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
This commit is contained in:
Xi Ruoyao 2025-02-24 20:49:17 +08:00 committed by caiyinyu
parent ee4ee1cb02
commit efd13567f7
6 changed files with 78 additions and 193 deletions
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48
sysdeps/loongarch/fpu/s_fmaximum_num.c
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/* fmaximum_num(). LoongArch version.
Copyright (C) 2022-2025 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_num (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 & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
{
asm volatile ("fmax.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return y;
}
else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
{
asm volatile ("fmax.d \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
return x;
}
else
{
asm volatile ("fmax.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fmaximum_num, fmaximum_num)

39
sysdeps/loongarch/fpu/s_fmaximum_num_template.c Normal file
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@ -0,0 +1,39 @@
/* Return maximum number of X and Y. LoongArch version.
Copyright (C) 2025 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/>. */
#ifndef INSN_FMT
#include_next <s_fmaximum_num_template.c>
#else
#include <math.h>
FLOAT
M_DECL_FUNC (__fmaximum_num) (FLOAT x, FLOAT y)
{
FLOAT a, b;
asm("fcmp.cor." INSN_FMT "\t$fcc0, %2, %2\n\t"
"fcmp.cor." INSN_FMT "\t$fcc1, %3, %3\n\t"
"fsel" "\t%0, %3, %2, $fcc0\n\t"
"fsel" "\t%1, %2, %3, $fcc1\n\t"
"fmax." INSN_FMT "\t%1, %0, %1"
: "=&f" (a), "=f" (b) : "f" (x), "f" (y) : "fcc0", "fcc1");
return b;
}
declare_mgen_alias (__fmaximum_num, fmaximum_num);
#endif

49
sysdeps/loongarch/fpu/s_fmaximum_numf.c
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@ -1,49 +0,0 @@
/* fmaximum_numf(). LoongArch version.
Copyright (C) 2022-2025 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_numf (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 & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
{
asm volatile ("fmax.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return y;
}
else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
{
asm volatile ("fmax.s \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
return x;
}
else
{
asm volatile ("fmax.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fmaximum_num, fmaximum_num)

48
sysdeps/loongarch/fpu/s_fminimum_num.c
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@ -1,48 +0,0 @@
/* fminimum_num(). LoongArch version.
Copyright (C) 2022-2025 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_num (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 & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
{
asm volatile ("fmin.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return y;
}
else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
{
asm volatile ("fmin.d \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
return x;
}
else
{
asm volatile ("fmin.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_double (__fminimum_num, fminimum_num)

39
sysdeps/loongarch/fpu/s_fminimum_num_template.c Normal file
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@ -0,0 +1,39 @@
/* Return minimum number of X and Y. LoongArch version.
Copyright (C) 2025 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/>. */
#ifndef INSN_FMT
#include_next <s_fminimum_num_template.c>
#else
#include <math.h>
FLOAT
M_DECL_FUNC (__fminimum_num) (FLOAT x, FLOAT y)
{
FLOAT a, b;
asm("fcmp.cor." INSN_FMT "\t$fcc0, %2, %2\n\t"
"fcmp.cor." INSN_FMT "\t$fcc1, %3, %3\n\t"
"fsel" "\t%0, %3, %2, $fcc0\n\t"
"fsel" "\t%1, %2, %3, $fcc1\n\t"
"fmin." INSN_FMT "\t%1, %0, %1"
: "=&f" (a), "=f" (b) : "f" (x), "f" (y) : "fcc0", "fcc1");
return b;
}
declare_mgen_alias (__fminimum_num, fminimum_num);
#endif

48
sysdeps/loongarch/fpu/s_fminimum_numf.c
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@ -1,48 +0,0 @@
/* fminimum_numf(). LoongArch version.
Copyright (C) 2022-2025 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_numf (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 & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
{
asm volatile ("fmin.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return y;
}
else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
{
asm volatile ("fmin.s \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
return x;
}
else
{
asm volatile ("fmin.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
return x;
}
}
libm_alias_float (__fminimum_num, fminimum_num)