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LoongArch: Optimize f{max,min}imum_mag{,f}
Following the logic of the previous commit. Signed-off-by: Xi Ruoyao <xry111@xry111.site>
This commit is contained in:
Xi Ruoyao
caiyinyu
parent
0195552e15
commit
ee4ee1cb02
4 changed files with 38 additions and 120 deletions
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/* fmaximum_mag(). LoongArch version.
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Copyright (C) 2022-2025 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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<https://www.gnu.org/licenses/>. */
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#define NO_MATH_REDIRECT
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#include <math.h>
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#include <libm-alias-double.h>
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#include <fpu_control.h>
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double
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__fmaximum_mag (double x, double y)
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{
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int x_cond;
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int y_cond;
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asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
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asm volatile ("fclass.d \t%0, %1" : "=f" (y_cond) : "f" (y));
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if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
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return x * y;
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else
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{
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asm volatile ("fmaxa.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
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return x;
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}
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}
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libm_alias_double (__fmaximum_mag, fmaximum_mag)
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@ -1,5 +1,5 @@
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/* fmaximum_magf(). LoongArch version.
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Copyright (C) 2022-2025 Free Software Foundation, Inc.
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/* Return value with maximum magnitude. LoongArch version.
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Copyright (C) 2025 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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@ -16,25 +16,24 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define NO_MATH_REDIRECT
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#ifndef INSN_FMT
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#include_next <s_fmaximum_mag_template.c>
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#else
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#include <math.h>
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#include <libm-alias-float.h>
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#include <fpu_control.h>
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float
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__fmaximum_magf (float x, float y)
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FLOAT
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M_DECL_FUNC (__fmaximum_mag) (FLOAT x, FLOAT y)
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{
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int x_cond;
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int y_cond;
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asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
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asm volatile ("fclass.s \t%0, %1" : "=f" (y_cond) : "f" (y));
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if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
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return x * y;
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else
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{
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asm volatile ("fmaxa.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
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return x;
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}
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FLOAT a, b;
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asm("fcmp.cor." INSN_FMT "\t$fcc0, %2, %2\n\t"
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"fcmp.cor." INSN_FMT "\t$fcc1, %3, %3\n\t"
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"fsel" "\t%0, %2, %3, $fcc0\n\t"
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"fsel" "\t%1, %3, %2, $fcc1\n\t"
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"fmaxa." INSN_FMT "\t%1, %0, %1"
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: "=&f" (a), "=f" (b) : "f" (x), "f" (y) : "fcc0", "fcc1");
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return b;
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}
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libm_alias_float (__fmaximum_mag, fmaximum_mag)
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declare_mgen_alias (__fmaximum_mag, fmaximum_mag);
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#endif
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@ -1,40 +0,0 @@
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/* fminimum_mag(). LoongArch version.
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Copyright (C) 2022-2025 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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<https://www.gnu.org/licenses/>. */
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#define NO_MATH_REDIRECT
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#include <math.h>
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#include <libm-alias-double.h>
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#include <fpu_control.h>
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double
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__fminimum_mag (double x, double y)
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{
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int x_cond;
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int y_cond;
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asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
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asm volatile ("fclass.d \t%0, %1" : "=f" (y_cond) : "f" (y));
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if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
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return x * y;
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else
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{
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asm volatile ("fmina.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
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return x;
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}
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}
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libm_alias_double (__fminimum_mag, fminimum_mag)
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@ -1,5 +1,5 @@
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/* fminimum_magf(). LoongArch version.
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Copyright (C) 2022-2025 Free Software Foundation, Inc.
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/* Return value with minimum magnitude. LoongArch version.
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Copyright (C) 2025 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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@ -16,25 +16,24 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define NO_MATH_REDIRECT
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#ifndef INSN_FMT
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#include_next <s_fminimum_mag_template.c>
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#else
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#include <math.h>
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#include <libm-alias-float.h>
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#include <fpu_control.h>
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float
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__fminimum_magf (float x, float y)
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FLOAT
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M_DECL_FUNC (__fminimum_mag) (FLOAT x, FLOAT y)
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{
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int x_cond;
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int y_cond;
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asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
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asm volatile ("fclass.s \t%0, %1" : "=f" (y_cond) : "f" (y));
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if (__glibc_unlikely((x_cond | y_cond) & _FCLASS_NAN))
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return x * y;
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else
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{
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asm volatile ("fmina.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
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return x;
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}
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FLOAT a, b;
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asm("fcmp.cor." INSN_FMT "\t$fcc0, %2, %2\n\t"
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"fcmp.cor." INSN_FMT "\t$fcc1, %3, %3\n\t"
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"fsel" "\t%0, %2, %3, $fcc0\n\t"
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"fsel" "\t%1, %3, %2, $fcc1\n\t"
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"fmina." INSN_FMT "\t%1, %0, %1"
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: "=&f" (a), "=f" (b) : "f" (x), "f" (y) : "fcc0", "fcc1");
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return b;
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}
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libm_alias_float (__fminimum_mag, fminimum_mag)
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declare_mgen_alias (__fminimum_mag, fminimum_mag);
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#endif
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