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From: Yinyu Cai <caiyinyu@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] LoongArch: Hard Float Support for fmaximum_num{f/ }, fminimum_num{f/ }. Date: Mon, 14 Nov 2022 02:03:53 +0000 (GMT) [thread overview] Message-ID: <20221114020353.032AE38357AC@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=bd612245748b2662a6e37d6592db5b177f621208 commit bd612245748b2662a6e37d6592db5b177f621208 Author: Xiaolin Tang <tangxiaolin@loongson.cn> Date: Mon Nov 7 22:07:48 2022 +0800 LoongArch: Hard Float Support for fmaximum_num{f/ }, fminimum_num{f/ }. 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. Diff: --- sysdeps/loongarch/fpu/s_fmaximum_num.c | 48 ++++++++++++++++++++++++++++++++ sysdeps/loongarch/fpu/s_fmaximum_numf.c | 49 +++++++++++++++++++++++++++++++++ sysdeps/loongarch/fpu/s_fminimum_num.c | 48 ++++++++++++++++++++++++++++++++ sysdeps/loongarch/fpu/s_fminimum_numf.c | 48 ++++++++++++++++++++++++++++++++ 4 files changed, 193 insertions(+) diff --git a/sysdeps/loongarch/fpu/s_fmaximum_num.c b/sysdeps/loongarch/fpu/s_fmaximum_num.c new file mode 100644 index 0000000000..142c65334c --- /dev/null +++ b/sysdeps/loongarch/fpu/s_fmaximum_num.c @@ -0,0 +1,48 @@ +/* fmaximum_num(). 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_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) diff --git a/sysdeps/loongarch/fpu/s_fmaximum_numf.c b/sysdeps/loongarch/fpu/s_fmaximum_numf.c new file mode 100644 index 0000000000..badf8f7e99 --- /dev/null +++ b/sysdeps/loongarch/fpu/s_fmaximum_numf.c @@ -0,0 +1,49 @@ +/* fmaximum_numf(). 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_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) diff --git a/sysdeps/loongarch/fpu/s_fminimum_num.c b/sysdeps/loongarch/fpu/s_fminimum_num.c new file mode 100644 index 0000000000..5d9680bea6 --- /dev/null +++ b/sysdeps/loongarch/fpu/s_fminimum_num.c @@ -0,0 +1,48 @@ +/* fminimum_num(). 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_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) diff --git a/sysdeps/loongarch/fpu/s_fminimum_numf.c b/sysdeps/loongarch/fpu/s_fminimum_numf.c new file mode 100644 index 0000000000..1610fe3263 --- /dev/null +++ b/sysdeps/loongarch/fpu/s_fminimum_numf.c @@ -0,0 +1,48 @@ +/* fminimum_numf(). 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_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)
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