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 07/10] LoongArch: Hard Float Support for fmaximum_num{f/ }, fminimum_num{f/ }.
Date: Mon, 7 Nov 2022 22:07:48 +0800 [thread overview]
Message-ID: <20221107140748.897997-1-tangxiaolin@loongson.cn> (raw)
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.
---
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(+)
create mode 100644 sysdeps/loongarch/fpu/s_fmaximum_num.c
create mode 100644 sysdeps/loongarch/fpu/s_fmaximum_numf.c
create mode 100644 sysdeps/loongarch/fpu/s_fminimum_num.c
create mode 100644 sysdeps/loongarch/fpu/s_fminimum_numf.c
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)
--
2.36.0
reply other threads:[~2022-11-07 14:07 UTC|newest]
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