123 lines
3.8 KiB
Diff
123 lines
3.8 KiB
Diff
commit c7c4a5906f326f1290b1c2413a83c530564ec4b8
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Author: Sunil K Pandey <skpgkp2@gmail.com>
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Date: Wed Mar 5 16:13:38 2025 -0800
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x86_64: Add atanh with FMA
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On SPR, it improves atanh bench performance by:
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Before After Improvement
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reciprocal-throughput 15.1715 14.8628 2%
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latency 57.1941 56.1883 2%
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Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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diff --git a/benchtests/atanh-inputs b/benchtests/atanh-inputs
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index 455aa65b6500bccb..498529325436d48f 100644
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--- a/benchtests/atanh-inputs
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+++ b/benchtests/atanh-inputs
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@@ -1,6 +1,7 @@
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## args: double
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## ret: double
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## includes: math.h
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+## name: workload-random
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0x1.5a2730bacd94ap-1
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-0x1.b57eb40fc048ep-21
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-0x1.c0b185fb450e2p-17
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diff --git a/sysdeps/ieee754/dbl-64/e_atanh.c b/sysdeps/ieee754/dbl-64/e_atanh.c
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index db1f69f953e62166..fbfabf0ca0a35e92 100644
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--- a/sysdeps/ieee754/dbl-64/e_atanh.c
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+++ b/sysdeps/ieee754/dbl-64/e_atanh.c
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@@ -45,6 +45,11 @@
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static const double huge = 1e300;
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+#ifndef SECTION
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+# define SECTION
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+#endif
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+
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+SECTION
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double
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__ieee754_atanh (double x)
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{
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@@ -74,4 +79,7 @@ __ieee754_atanh (double x)
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return copysign (t, x);
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}
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+
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+#ifndef __ieee754_atanh
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libm_alias_finite (__ieee754_atanh, __atanh)
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+#endif
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diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile
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index 40a9654ecadca713..9ebc7f62f7479eed 100644
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--- a/sysdeps/x86_64/fpu/multiarch/Makefile
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+++ b/sysdeps/x86_64/fpu/multiarch/Makefile
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@@ -1,6 +1,7 @@
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ifeq ($(subdir),math)
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CFLAGS-e_asin-fma.c = -mfma -mavx2
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CFLAGS-e_atan2-fma.c = -mfma -mavx2
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+CFLAGS-e_atanh-fma.c = -mfma -mavx2
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CFLAGS-e_exp-fma.c = -mfma -mavx2
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CFLAGS-e_log-fma.c = -mfma -mavx2
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CFLAGS-e_log2-fma.c = -mfma -mavx2
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@@ -57,6 +58,7 @@ libm-sysdep_routines += \
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e_asin-fma \
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e_atan2-avx \
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e_atan2-fma \
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+ e_atanh-fma \
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e_exp-avx \
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e_exp-fma \
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e_exp2f-fma \
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diff --git a/sysdeps/x86_64/fpu/multiarch/e_atanh-fma.c b/sysdeps/x86_64/fpu/multiarch/e_atanh-fma.c
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new file mode 100644
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index 0000000000000000..c3f2f9e5506ae363
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--- /dev/null
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+++ b/sysdeps/x86_64/fpu/multiarch/e_atanh-fma.c
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@@ -0,0 +1,6 @@
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+#define __ieee754_atanh __ieee754_atanh_fma
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+#define __log1p __log1p_fma
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+
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+#define SECTION __attribute__ ((section (".text.fma")))
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+
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+#include <sysdeps/ieee754/dbl-64/e_atanh.c>
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diff --git a/sysdeps/x86_64/fpu/multiarch/e_atanh.c b/sysdeps/x86_64/fpu/multiarch/e_atanh.c
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new file mode 100644
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index 0000000000000000..d2b785dfc0268df8
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--- /dev/null
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+++ b/sysdeps/x86_64/fpu/multiarch/e_atanh.c
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@@ -0,0 +1,34 @@
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+/* Multiple versions of atanh.
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+ Copyright (C) 2025 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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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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+
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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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+
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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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+
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+#include <sysdeps/x86/isa-level.h>
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+#if MINIMUM_X86_ISA_LEVEL < AVX2_X86_ISA_LEVEL
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+# include <libm-alias-finite.h>
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+
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+extern double __redirect_ieee754_atanh (double);
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+
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+# define SYMBOL_NAME ieee754_atanh
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+# include "ifunc-fma.h"
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+
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+libc_ifunc_redirected (__redirect_ieee754_atanh, __ieee754_atanh, IFUNC_SELECTOR ());
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+
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+libm_alias_finite (__ieee754_atanh, __atanh)
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+
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+# define __ieee754_atanh __ieee754_atanh_sse2
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+#endif
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+#include <sysdeps/ieee754/dbl-64/e_atanh.c>
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