* [PATCH v2 08/10] LoongArch: Add support for scalbn[f]
2022-11-23 3:49 [PATCH v2 00/10] LoongArch: Use builtins with GCC >= 13 Xiaolin Tang
@ 2022-11-23 3:49 ` Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 09/10] LoongArch: Add support for scalb[f] Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 10/10] LoongArch: Add support for ilogb[f] Xiaolin Tang
2 siblings, 0 replies; 4+ messages in thread
From: Xiaolin Tang @ 2022-11-23 3:49 UTC (permalink / raw)
To: adhemerval.zanella, libc-alpha, caiyinyu, xry111
Cc: xuchenghua, chenglulu, Xiaolin Tang
Add inline assembler for the scalbn functions. Passes GLIBC regression.
GCC 13, LoongArch support ___builtin_scalbn{,f} with -fno-math-errno,
but only "libm" can use -fno-math-errno in GLIBC, and scalbn is in libc
instead of libm because __printf_fp calls it.
---
sysdeps/loongarch/fpu/s_scalbn.c | 29 +++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/s_scalbnf.c | 29 +++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)
create mode 100644 sysdeps/loongarch/fpu/s_scalbn.c
create mode 100644 sysdeps/loongarch/fpu/s_scalbnf.c
diff --git a/sysdeps/loongarch/fpu/s_scalbn.c b/sysdeps/loongarch/fpu/s_scalbn.c
new file mode 100644
index 0000000000..c03e81a31e
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_scalbn.c
@@ -0,0 +1,29 @@
+/* scalbn(). 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>
+
+double
+__scalbn (double x, int fn)
+{
+ double tmp;
+ asm volatile ("movgr2fr.d \t%0, %1" : "=f" (tmp) : "r" (fn));
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ return x;
+}
diff --git a/sysdeps/loongarch/fpu/s_scalbnf.c b/sysdeps/loongarch/fpu/s_scalbnf.c
new file mode 100644
index 0000000000..15e6428044
--- /dev/null
+++ b/sysdeps/loongarch/fpu/s_scalbnf.c
@@ -0,0 +1,29 @@
+/* scalbnf(). 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>
+
+float
+__scalbnf (float x, int fn)
+{
+ float tmp;
+ asm volatile ("movgr2fr.w \t%0, %1" : "=f" (tmp) : "r" (fn));
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ return x;
+}
--
2.31.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v2 09/10] LoongArch: Add support for scalb[f]
2022-11-23 3:49 [PATCH v2 00/10] LoongArch: Use builtins with GCC >= 13 Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 08/10] LoongArch: Add support for scalbn[f] Xiaolin Tang
@ 2022-11-23 3:49 ` Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 10/10] LoongArch: Add support for ilogb[f] Xiaolin Tang
2 siblings, 0 replies; 4+ messages in thread
From: Xiaolin Tang @ 2022-11-23 3:49 UTC (permalink / raw)
To: adhemerval.zanella, libc-alpha, caiyinyu, xry111
Cc: xuchenghua, chenglulu, Xiaolin Tang
Add inline assembler for the scalb functions. Passes GLIBC regression.
---
sysdeps/loongarch/fpu/e_scalb.c | 60 ++++++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/e_scalbf.c | 60 ++++++++++++++++++++++++++++++++
2 files changed, 120 insertions(+)
create mode 100644 sysdeps/loongarch/fpu/e_scalb.c
create mode 100644 sysdeps/loongarch/fpu/e_scalbf.c
diff --git a/sysdeps/loongarch/fpu/e_scalb.c b/sysdeps/loongarch/fpu/e_scalb.c
new file mode 100644
index 0000000000..9fdf21fa3a
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_scalb.c
@@ -0,0 +1,60 @@
+/* scalb(). 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-finite.h>
+#include <fpu_control.h>
+#include <float.h>
+
+double
+__ieee754_scalb (double x, double fn)
+{
+ int x_cond;
+ int fn_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+ asm volatile ("fclass.d \t%0, %1" : "=f" (fn_cond) : "f" (fn));
+
+ if (__glibc_unlikely(( x_cond | fn_cond) & _FCLASS_NAN))
+ return x * fn;
+ else if (__glibc_unlikely(fn_cond & _FCLASS_INF))
+ {
+ if (!(fn_cond & _FCLASS_MINF))
+ return x * fn;
+ else
+ return x / -fn;
+ }
+ else if (__glibc_likely(-DBL_MAX < fn && fn < DBL_MAX))
+ {
+ double rint_fn, tmp;
+
+ /* rint_fn = rint(fn) */
+ asm volatile ("frint.d \t%0, %1" : "=f" (rint_fn) : "f" (fn));
+
+ if (rint_fn != fn )
+ return (x - x) / (x - x);
+
+ asm volatile ("ftintrz.l.d \t%0, %1" : "=f" (tmp) : "f" (rint_fn));
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ }
+ else
+ asm volatile ("fscaleb.d \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (fn));
+
+ return x;
+}
+libm_alias_finite (__ieee754_scalb, __scalb)
diff --git a/sysdeps/loongarch/fpu/e_scalbf.c b/sysdeps/loongarch/fpu/e_scalbf.c
new file mode 100644
index 0000000000..fae2e92e20
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_scalbf.c
@@ -0,0 +1,60 @@
+/* scalbf(). 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-finite.h>
+#include <fpu_control.h>
+#include <float.h>
+
+float
+__ieee754_scalbf (float x, float fn)
+{
+ int x_cond;
+ int fn_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+ asm volatile ("fclass.s \t%0, %1" : "=f" (fn_cond) : "f" (fn));
+
+ if (__glibc_unlikely(( x_cond | fn_cond) & _FCLASS_NAN))
+ return x * fn;
+ else if (__glibc_unlikely(fn_cond & _FCLASS_INF))
+ {
+ if (!(fn_cond & _FCLASS_MINF))
+ return x * fn;
+ else
+ return x / -fn;
+ }
+ else if (__glibc_likely(-FLT_MAX < fn && fn < FLT_MAX))
+ {
+ float rintf_fn, tmp;
+
+ /* rintf_fn = rintf(fn) */
+ asm volatile ("frint.s \t%0, %1" : "=f" (rintf_fn) : "f" (fn));
+
+ if (rintf_fn != fn )
+ return (x - x) / (x - x);
+
+ asm volatile ("ftintrz.w.s \t%0, %1" : "=f" (tmp) : "f" (rintf_fn));
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (tmp));
+ }
+ else
+ asm volatile ("fscaleb.s \t%0, %1, %2" : "=f" (x) : "f" (x), "f" (fn));
+
+ return x;
+}
+libm_alias_finite (__ieee754_scalb, __scalb)
--
2.31.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v2 10/10] LoongArch: Add support for ilogb[f]
2022-11-23 3:49 [PATCH v2 00/10] LoongArch: Use builtins with GCC >= 13 Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 08/10] LoongArch: Add support for scalbn[f] Xiaolin Tang
2022-11-23 3:49 ` [PATCH v2 09/10] LoongArch: Add support for scalb[f] Xiaolin Tang
@ 2022-11-23 3:49 ` Xiaolin Tang
2 siblings, 0 replies; 4+ messages in thread
From: Xiaolin Tang @ 2022-11-23 3:49 UTC (permalink / raw)
To: adhemerval.zanella, libc-alpha, caiyinyu, xry111
Cc: xuchenghua, chenglulu, Xiaolin Tang
Add inline assembler for the ilogb functions. Passes GLIBC regression.
---
sysdeps/loongarch/fpu/e_ilogb.c | 39 ++++++++++++++++++++++++++++++++
sysdeps/loongarch/fpu/e_ilogbf.c | 39 ++++++++++++++++++++++++++++++++
2 files changed, 78 insertions(+)
create mode 100644 sysdeps/loongarch/fpu/e_ilogb.c
create mode 100644 sysdeps/loongarch/fpu/e_ilogbf.c
diff --git a/sysdeps/loongarch/fpu/e_ilogb.c b/sysdeps/loongarch/fpu/e_ilogb.c
new file mode 100644
index 0000000000..f9ada6921a
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_ilogb.c
@@ -0,0 +1,39 @@
+/* __ieee754_ilogb(). 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 <fpu_control.h>
+
+int
+__ieee754_ilogb (double x)
+{
+ int x_cond;
+ asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+ if (__glibc_unlikely (x_cond & _FCLASS_ZERO))
+ return FP_ILOGB0;
+ else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF)))
+ return FP_ILOGBNAN;
+ else
+ {
+ asm volatile ("fabs.d \t%0, %1" : "=f" (x) : "f" (x));
+ asm volatile ("flogb.d \t%0, %1" : "=f" (x) : "f" (x));
+ return x;
+ }
+}
diff --git a/sysdeps/loongarch/fpu/e_ilogbf.c b/sysdeps/loongarch/fpu/e_ilogbf.c
new file mode 100644
index 0000000000..e1da48ecfc
--- /dev/null
+++ b/sysdeps/loongarch/fpu/e_ilogbf.c
@@ -0,0 +1,39 @@
+/* __ieee754_ilogbf(). 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 <fpu_control.h>
+
+int
+__ieee754_ilogbf (float x)
+{
+ int x_cond;
+ asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
+
+ if (__glibc_unlikely (x_cond & _FCLASS_ZERO))
+ return FP_ILOGB0;
+ else if (__glibc_unlikely (x_cond & ( _FCLASS_NAN | _FCLASS_INF)))
+ return FP_ILOGBNAN;
+ else
+ {
+ asm volatile ("fabs.s \t%0, %1" : "=f" (x) : "f" (x));
+ asm volatile ("flogb.s \t%0, %1" : "=f" (x) : "f" (x));
+ return x;
+ }
+}
--
2.31.1
^ permalink raw reply related [flat|nested] 4+ messages in thread