From: Xiaolin Tang <tangxiaolin@loongson.cn>
To: adhemerval.zanella@linaro.org, libc-alpha@sourceware.org,
i.swmail@xen0n.name
Cc: caiyinyu@loongson.cn, xry111@xry111.site, xuchenghua@loongson.cn,
chenglulu@loongson.cn, Xiaolin Tang <tangxiaolin@loongson.cn>
Subject: [PATCH v2 06/10] LoongArch: Hard Float Support for fmaximum{f/ }, fminimum{f/ }.
Date: Mon, 7 Nov 2022 22:05:19 +0800 [thread overview]
Message-ID: <20221107140523.896735-7-tangxiaolin@loongson.cn> (raw)
In-Reply-To: <20221107140523.896735-1-tangxiaolin@loongson.cn>
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.
---
sysdeps/loongarch/fpu/s_fmaximum.c | 40 +++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_fmaximumf.c | 40 +++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_fminimum.c | 40 +++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_fminimumf.c | 40 +++++++++++++++++++++++++++++
4 files changed, 160 insertions(+)
create mode 100644 sysdeps/loongarch/fpu/s_fmaximum.c
create mode 100644 sysdeps/loongarch/fpu/s_fmaximumf.c
create mode 100644 sysdeps/loongarch/fpu/s_fminimum.c
create mode 100644 sysdeps/loongarch/fpu/s_fminimumf.c
diff --git a/sysdeps/loongarch/fpu/s_fmaximum.c b/sysdeps/loongarch/fpu/s_fmaximum.c
new file mode 100644
index 0000000000..af1c2bf006
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fmaximum.c
@@ -0,0 +1,40 @@
+/* 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)
diff --git a/sysdeps/loongarch/fpu/s_fmaximumf.c b/sysdeps/loongarch/fpu/s_fmaximumf.c
new file mode 100644
index 0000000000..da4dcb6a3b
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fmaximumf.c
@@ -0,0 +1,40 @@
+/* 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)
diff --git a/sysdeps/loongarch/fpu/s_fminimum.c b/sysdeps/loongarch/fpu/s_fminimum.c
new file mode 100644
index 0000000000..e395ff7e62
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fminimum.c
@@ -0,0 +1,40 @@
+/* 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)
diff --git a/sysdeps/loongarch/fpu/s_fminimumf.c b/sysdeps/loongarch/fpu/s_fminimumf.c
new file mode 100644
index 0000000000..680c5e7e9a
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_fminimumf.c
@@ -0,0 +1,40 @@
+/* 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)
--
2.36.0
next prev parent reply other threads:[~2022-11-07 14:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-07 14:05 [PATCH v2 00/10] LoongArch: Hard Float Support Of Math Functions Xiaolin Tang
2022-11-07 14:05 ` [PATCH v2 01/10] LoongArch: Hard Float Support for functions {ll/l/ }rint{f/ } Xiaolin Tang
2022-11-07 14:38 ` Xi Ruoyao
2022-11-07 16:36 ` Adhemerval Zanella Netto
2022-11-07 14:05 ` [PATCH v2 02/10] LoongArch: Use __builtin_{fma, fmaf} to implement function {fma, fmaf} Xiaolin Tang
2022-11-07 14:05 ` [PATCH v2 03/10] LoongArch: Hard Float Support for float-point classification functions Xiaolin Tang
2022-11-07 14:05 ` [PATCH v2 04/10] LoongArch: Hard Float Support for functions logb{f/ }, __ieee754_ilogb{f/ } Xiaolin Tang
2022-11-07 14:05 ` [PATCH v2 05/10] LoongArch: Hard Float Support for functions scalb{f/ }, scalbn{f/ } Xiaolin Tang
2022-11-08 3:46 ` Xi Ruoyao
2022-11-07 14:05 ` Xiaolin Tang [this message]
2022-11-11 4:02 ` [PATCH v2 00/10] LoongArch: Hard Float Support Of Math Functions caiyinyu
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