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bd61224574
Use hardware Floating-point instruction f{max/min}.{s/d}, fclass.{s/d}
to implement fmaximum_num{f/ }, fminimum_num{f/ }.
* sysdeps/loongarch/fpu/s_fmaximum_num.c: New file.
* sysdeps/loongarch/fpu/s_fmaximum_numf.c: Likewise.
* sysdeps/loongarch/fpu/s_fminimum_num.c: Likewise.
* sysdeps/loongarch/fpu/s_fminimum_numf.c: Likewise.
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* fmaximum_num(). LoongArch version.
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Copyright (C) 2022 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_num (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 & _FCLASS_NAN) && !(y_cond & _FCLASS_NAN)))
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{
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asm volatile ("fmax.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (y));
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return y;
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}
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else if (__glibc_unlikely(!(x_cond & _FCLASS_NAN) && (y_cond & _FCLASS_NAN)))
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{
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asm volatile ("fmax.d \t%0, %1, %2" : "=f" (y) : "f" (x), "f" (y));
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return x;
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}
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else
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{
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asm volatile ("fmax.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_num, fmaximum_num)
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