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* [glibc] x86: Add evex optimized functions for the wchar_t strcpy family
@ 2022-11-09 4:34 Noah Goldstein
0 siblings, 0 replies; only message in thread
From: Noah Goldstein @ 2022-11-09 4:34 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=64b8b6516b3cba19dba4c8f4f9b97daa0556fd98
commit 64b8b6516b3cba19dba4c8f4f9b97daa0556fd98
Author: Noah Goldstein <goldstein.w.n@gmail.com>
Date: Tue Nov 8 17:38:40 2022 -0800
x86: Add evex optimized functions for the wchar_t strcpy family
Implemented:
wcscat-evex (+ 905 bytes)
wcscpy-evex (+ 674 bytes)
wcpcpy-evex (+ 709 bytes)
wcsncpy-evex (+1358 bytes)
wcpncpy-evex (+1467 bytes)
wcsncat-evex (+1213 bytes)
Performance Changes:
Times are from N = 10 runs of the benchmark suite and are reported
as geometric mean of all ratios of New Implementation / Best Old
Implementation. Best Old Implementation was determined with the
highest ISA implementation.
wcscat-evex -> 0.991
wcscpy-evex -> 0.587
wcpcpy-evex -> 0.695
wcsncpy-evex -> 0.719
wcpncpy-evex -> 0.694
wcsncat-evex -> 0.979
Code Size Changes:
This change increase the size of libc.so by ~6.3kb bytes. For
reference the patch optimizing the normal strcpy family functions
decreases libc.so by ~5.7kb.
Full check passes on x86-64 and build succeeds for all ISA levels w/
and w/o multiarch.
Diff:
---
sysdeps/x86_64/Makefile | 5 +++
sysdeps/x86_64/multiarch/Makefile | 14 ++++++-
sysdeps/x86_64/multiarch/ifunc-impl-list.c | 63 ++++++++++++++++++++++++++++--
sysdeps/x86_64/multiarch/ifunc-wcs.h | 48 +++++++++++++++++++++++
sysdeps/x86_64/multiarch/wcpcpy-evex.S | 8 ++++
sysdeps/x86_64/multiarch/wcpcpy-generic.c | 27 +++++++++++++
sysdeps/x86_64/multiarch/wcpcpy.c | 37 ++++++++++++++++++
sysdeps/x86_64/multiarch/wcpncpy-evex.S | 8 ++++
sysdeps/x86_64/multiarch/wcpncpy-generic.c | 27 +++++++++++++
sysdeps/x86_64/multiarch/wcpncpy.c | 37 ++++++++++++++++++
sysdeps/x86_64/multiarch/wcscat-evex.S | 9 +++++
sysdeps/x86_64/multiarch/wcscat-generic.c | 27 +++++++++++++
sysdeps/x86_64/multiarch/wcscat.c | 37 ++++++++++++++++++
sysdeps/x86_64/multiarch/wcscpy-evex.S | 7 ++++
sysdeps/x86_64/multiarch/wcscpy-generic.c | 3 +-
sysdeps/x86_64/multiarch/wcscpy.c | 11 ++++++
sysdeps/x86_64/multiarch/wcsncat-evex.S | 9 +++++
sysdeps/x86_64/multiarch/wcsncat-generic.c | 27 +++++++++++++
sysdeps/x86_64/multiarch/wcsncat.c | 34 ++++++++++++++++
sysdeps/x86_64/multiarch/wcsncpy-evex.S | 7 ++++
sysdeps/x86_64/multiarch/wcsncpy-generic.c | 27 +++++++++++++
sysdeps/x86_64/multiarch/wcsncpy.c | 37 ++++++++++++++++++
sysdeps/x86_64/wcpcpy-generic.c | 31 +++++++++++++++
sysdeps/x86_64/wcpcpy.S | 40 +++++++++++++++++++
sysdeps/x86_64/wcpncpy-generic.c | 31 +++++++++++++++
sysdeps/x86_64/wcpncpy.S | 40 +++++++++++++++++++
sysdeps/x86_64/wcscat-generic.c | 31 +++++++++++++++
sysdeps/x86_64/wcscat.S | 40 +++++++++++++++++++
sysdeps/x86_64/wcscpy.S | 3 +-
sysdeps/x86_64/wcsncat-generic.c | 31 +++++++++++++++
sysdeps/x86_64/wcsncat.S | 38 ++++++++++++++++++
sysdeps/x86_64/wcsncpy-generic.c | 31 +++++++++++++++
sysdeps/x86_64/wcsncpy.S | 40 +++++++++++++++++++
33 files changed, 858 insertions(+), 7 deletions(-)
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 3627c5659f..688eb2d7c4 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -188,8 +188,13 @@ endif
ifeq ($(subdir),wcsmbs)
sysdep_routines += \
+ wcpcpy-generic \
+ wcpncpy-generic \
+ wcscat-generic \
wcscpy-generic \
+ wcsncat-generic \
wcsncmp-generic \
+ wcsncpy-generic \
wcsnlen-generic \
# sysdep_routines
diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile
index 066bfa48d9..d6e01940c3 100644
--- a/sysdeps/x86_64/multiarch/Makefile
+++ b/sysdeps/x86_64/multiarch/Makefile
@@ -131,6 +131,12 @@ endif
ifeq ($(subdir),wcsmbs)
sysdep_routines += \
+ wcpcpy-evex \
+ wcpcpy-generic \
+ wcpncpy-evex \
+ wcpncpy-generic \
+ wcscat-evex \
+ wcscat-generic \
wcschr-avx2 \
wcschr-avx2-rtm \
wcschr-evex \
@@ -140,6 +146,8 @@ sysdep_routines += \
wcscmp-avx2-rtm \
wcscmp-evex \
wcscmp-sse2 \
+ wcscpy-evex \
+ wcscpy-generic \
wcscpy-ssse3 \
wcslen-avx2 \
wcslen-avx2-rtm \
@@ -147,9 +155,13 @@ sysdep_routines += \
wcslen-evex512 \
wcslen-sse2 \
wcslen-sse4_1 \
+ wcsncat-evex \
+ wcsncat-generic \
wcsncmp-avx2 \
wcsncmp-avx2-rtm \
wcsncmp-evex \
+ wcsncpy-evex \
+ wcsncpy-generic \
wcsnlen-avx2 \
wcsnlen-avx2-rtm \
wcsnlen-evex \
@@ -163,8 +175,8 @@ sysdep_routines += \
wmemchr-avx2 \
wmemchr-avx2-rtm \
wmemchr-evex \
- wmemchr-evex512 \
wmemchr-evex-rtm \
+ wmemchr-evex512 \
wmemchr-sse2 \
wmemcmp-avx2-movbe \
wmemcmp-avx2-movbe-rtm \
diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
index 7cebee7ec7..c908d6c158 100644
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
@@ -901,16 +901,73 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
/* Support sysdeps/x86_64/multiarch/wcscpy.c. */
IFUNC_IMPL (i, name, wcscpy,
- /* ISA V4 wrapper for SSSE3 implementation because
- the SSSE3 implementation is also used at ISA
- level 3/4. */
X86_IFUNC_IMPL_ADD_V4 (array, i, wcscpy,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcscpy_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcscpy,
CPU_FEATURE_USABLE (SSSE3),
__wcscpy_ssse3)
X86_IFUNC_IMPL_ADD_V1 (array, i, wcscpy,
1,
__wcscpy_generic))
+ /* Support sysdeps/x86_64/multiarch/wcsncpy.c. */
+ IFUNC_IMPL (i, name, wcsncpy,
+ X86_IFUNC_IMPL_ADD_V4 (array, i, wcsncpy,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcsncpy_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcpncpy,
+ 1,
+ __wcsncpy_generic))
+
+ /* Support sysdeps/x86_64/multiarch/wcpcpy.c. */
+ IFUNC_IMPL (i, name, wcpcpy,
+ X86_IFUNC_IMPL_ADD_V4 (array, i, wcpcpy,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcpcpy_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcpcpy,
+ 1,
+ __wcpcpy_generic))
+
+ /* Support sysdeps/x86_64/multiarch/wcpncpy.c. */
+ IFUNC_IMPL (i, name, wcpncpy,
+ X86_IFUNC_IMPL_ADD_V4 (array, i, wcpncpy,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcpncpy_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcsncpy,
+ 1,
+ __wcpncpy_generic))
+
+ /* Support sysdeps/x86_64/multiarch/wcscat.c. */
+ IFUNC_IMPL (i, name, wcscat,
+ X86_IFUNC_IMPL_ADD_V4 (array, i, wcscat,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcscat_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcscat,
+ 1,
+ __wcscat_generic))
+
+ /* Support sysdeps/x86_64/multiarch/wcsncat.c. */
+ IFUNC_IMPL (i, name, wcsncat,
+ X86_IFUNC_IMPL_ADD_V4 (array, i, wcsncat,
+ (CPU_FEATURE_USABLE (AVX512VL)
+ && CPU_FEATURE_USABLE (AVX512BW)
+ && CPU_FEATURE_USABLE (BMI2)),
+ __wcsncat_evex)
+ X86_IFUNC_IMPL_ADD_V3 (array, i, wcsncat,
+ 1,
+ __wcsncat_generic))
+
/* Support sysdeps/x86_64/multiarch/wcslen.c. */
IFUNC_IMPL (i, name, wcslen,
X86_IFUNC_IMPL_ADD_V4 (array, i, wcslen,
diff --git a/sysdeps/x86_64/multiarch/ifunc-wcs.h b/sysdeps/x86_64/multiarch/ifunc-wcs.h
new file mode 100644
index 0000000000..1d2a63458b
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/ifunc-wcs.h
@@ -0,0 +1,48 @@
+/* Common definition for ifunc selections optimized wide-character
+ string copy functions.
+
+ All versions must be listed in ifunc-impl-list.c.
+ 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/>. */
+
+#include <init-arch.h>
+
+#ifndef GENERIC
+# define GENERIC generic
+#endif
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden;
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (GENERIC) attribute_hidden;
+
+static inline void *
+IFUNC_SELECTOR (void)
+{
+ const struct cpu_features *cpu_features = __get_cpu_features ();
+
+ if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2)
+ && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, BMI2)
+ && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features,
+ AVX_Fast_Unaligned_Load, ))
+ {
+ if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
+ && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW))
+ return OPTIMIZE (evex);
+ }
+
+ return OPTIMIZE (GENERIC);
+}
diff --git a/sysdeps/x86_64/multiarch/wcpcpy-evex.S b/sysdeps/x86_64/multiarch/wcpcpy-evex.S
new file mode 100644
index 0000000000..ac6429cc07
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpcpy-evex.S
@@ -0,0 +1,8 @@
+#ifndef WCPCPY
+# define WCPCPY __wcpcpy_evex
+#endif
+
+#define USE_AS_STPCPY
+#define USE_AS_WCSCPY
+#define STRCPY WCPCPY
+#include "strcpy-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcpcpy-generic.c b/sysdeps/x86_64/multiarch/wcpcpy-generic.c
new file mode 100644
index 0000000000..6039196a3e
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpcpy-generic.c
@@ -0,0 +1,27 @@
+/* wcpcpy.
+ 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/>. */
+
+/* We always need to build this implementation as strspn-sse4 needs to
+ be able to fallback to it. */
+#include <isa-level.h>
+#if ISA_SHOULD_BUILD (3)
+
+# define WCPCPY __wcpcpy_generic
+# include <wcsmbs/wcpcpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcpcpy.c b/sysdeps/x86_64/multiarch/wcpcpy.c
new file mode 100644
index 0000000000..8f96ddbc99
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpcpy.c
@@ -0,0 +1,37 @@
+/* Multiple versions of wcpcpy.
+ All versions must be listed in ifunc-impl-list.c.
+ 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 multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define __wcpcpy __redirect_wcpcpy
+# include <wchar.h>
+# undef __wcpcpy
+
+# define SYMBOL_NAME wcpcpy
+# include <init-arch.h>
+
+# include "ifunc-wcs.h"
+
+libc_ifunc_redirected (__redirect_wcpcpy, __wcpcpy, IFUNC_SELECTOR ());
+weak_alias (__wcpcpy, wcpcpy)
+# ifdef SHARED
+__hidden_ver1 (__wcpcpy, __GI___wcpcpy, __redirect_wcpcpy)
+ __attribute__((visibility ("hidden"))) __attribute_copy__ (wcpcpy);
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcpncpy-evex.S b/sysdeps/x86_64/multiarch/wcpncpy-evex.S
new file mode 100644
index 0000000000..62ddb694fe
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpncpy-evex.S
@@ -0,0 +1,8 @@
+#ifndef WCPNCPY
+# define WCPNCPY __wcpncpy_evex
+#endif
+
+#define USE_AS_WCSCPY
+#define USE_AS_STPCPY
+#define STRNCPY WCPNCPY
+#include "strncpy-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcpncpy-generic.c b/sysdeps/x86_64/multiarch/wcpncpy-generic.c
new file mode 100644
index 0000000000..de8d34320e
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpncpy-generic.c
@@ -0,0 +1,27 @@
+/* wcpncpy.
+ 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/>. */
+
+/* We always need to build this implementation as strspn-sse4 needs to
+ be able to fallback to it. */
+#include <isa-level.h>
+#if ISA_SHOULD_BUILD (3)
+
+# define WCPNCPY __wcpncpy_generic
+# include <wcsmbs/wcpncpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcpncpy.c b/sysdeps/x86_64/multiarch/wcpncpy.c
new file mode 100644
index 0000000000..ed8f307e07
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcpncpy.c
@@ -0,0 +1,37 @@
+/* Multiple versions of wcpncpy.
+ All versions must be listed in ifunc-impl-list.c.
+ 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 multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define __wcpncpy __redirect_wcpncpy
+# include <wchar.h>
+# undef __wcpncpy
+
+# define SYMBOL_NAME wcpncpy
+# include <init-arch.h>
+
+# include "ifunc-wcs.h"
+
+libc_ifunc_redirected (__redirect_wcpncpy, __wcpncpy, IFUNC_SELECTOR ());
+weak_alias (__wcpncpy, wcpncpy)
+# ifdef SHARED
+__hidden_ver1 (__wcpncpy, __GI___wcpncpy, __redirect_wcpncpy)
+ __attribute__((visibility ("hidden"))) __attribute_copy__ (wcpncpy);
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcscat-evex.S b/sysdeps/x86_64/multiarch/wcscat-evex.S
new file mode 100644
index 0000000000..1d017e4899
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcscat-evex.S
@@ -0,0 +1,9 @@
+#ifndef WCSCAT
+# define WCSCAT __wcscat_evex
+#endif
+
+#define USE_AS_WCSCPY
+#define USE_AS_STRCAT
+
+#define STRCPY WCSCAT
+#include "strcpy-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcscat-generic.c b/sysdeps/x86_64/multiarch/wcscat-generic.c
new file mode 100644
index 0000000000..d86b4d5c00
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcscat-generic.c
@@ -0,0 +1,27 @@
+/* wcscat.
+ 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/>. */
+
+/* We always need to build this implementation as strspn-sse4 needs to
+ be able to fallback to it. */
+#include <isa-level.h>
+#if ISA_SHOULD_BUILD (3)
+
+# define WCSCAT __wcscat_generic
+# include <wcsmbs/wcscat.c>
+
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcscat.c b/sysdeps/x86_64/multiarch/wcscat.c
new file mode 100644
index 0000000000..3277c44561
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcscat.c
@@ -0,0 +1,37 @@
+/* Multiple versions of wcscat.
+ All versions must be listed in ifunc-impl-list.c.
+ 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 multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define __wcscat __redirect_wcscat
+# include <wchar.h>
+# undef __wcscat
+
+# define SYMBOL_NAME wcscat
+# include <init-arch.h>
+
+# include "ifunc-wcs.h"
+
+libc_ifunc_redirected (__redirect_wcscat, __wcscat, IFUNC_SELECTOR ());
+weak_alias (__wcscat, wcscat)
+# ifdef SHARED
+__hidden_ver1 (__wcscat, __GI___wcscat, __redirect_wcscat)
+ __attribute__((visibility ("hidden"))) __attribute_copy__ (wcscat);
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcscpy-evex.S b/sysdeps/x86_64/multiarch/wcscpy-evex.S
new file mode 100644
index 0000000000..1069a8e224
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcscpy-evex.S
@@ -0,0 +1,7 @@
+#ifndef WCSCPY
+# define WCSCPY __wcscpy_evex
+#endif
+
+#define USE_AS_WCSCPY
+#define STRCPY WCSCPY
+#include "strcpy-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcscpy-generic.c b/sysdeps/x86_64/multiarch/wcscpy-generic.c
index 93d314aaad..4a1fffae4b 100644
--- a/sysdeps/x86_64/multiarch/wcscpy-generic.c
+++ b/sysdeps/x86_64/multiarch/wcscpy-generic.c
@@ -18,8 +18,7 @@
#include <isa-level.h>
-
-#if ISA_SHOULD_BUILD (1)
+#if ISA_SHOULD_BUILD (3)
# define WCSCPY __wcscpy_generic
# include <wcsmbs/wcscpy.c>
diff --git a/sysdeps/x86_64/multiarch/wcscpy.c b/sysdeps/x86_64/multiarch/wcscpy.c
index 92c917b6b4..9ad77da8ac 100644
--- a/sysdeps/x86_64/multiarch/wcscpy.c
+++ b/sysdeps/x86_64/multiarch/wcscpy.c
@@ -26,6 +26,8 @@
# define SYMBOL_NAME wcscpy
# include <init-arch.h>
+extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden;
+
extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
extern __typeof (REDIRECT_NAME) OPTIMIZE (generic) attribute_hidden;
@@ -35,6 +37,15 @@ IFUNC_SELECTOR (void)
{
const struct cpu_features* cpu_features = __get_cpu_features ();
+ if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2)
+ && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, BMI2)
+ && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load, ))
+ {
+ if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
+ && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW))
+ return OPTIMIZE (evex);
+ }
+
if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, SSSE3))
return OPTIMIZE (ssse3);
diff --git a/sysdeps/x86_64/multiarch/wcsncat-evex.S b/sysdeps/x86_64/multiarch/wcsncat-evex.S
new file mode 100644
index 0000000000..392215950a
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncat-evex.S
@@ -0,0 +1,9 @@
+#ifndef WCSCAT
+# define WCSCAT __wcsncat_evex
+#endif
+
+#define USE_AS_WCSCPY
+#define USE_AS_STRCAT
+
+#define STRNCAT WCSCAT
+#include "strncat-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcsncat-generic.c b/sysdeps/x86_64/multiarch/wcsncat-generic.c
new file mode 100644
index 0000000000..4b55cb40bc
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncat-generic.c
@@ -0,0 +1,27 @@
+/* wcsncat.
+ 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/>. */
+
+/* We always need to build this implementation as strspn-sse4 needs to
+ be able to fallback to it. */
+#include <isa-level.h>
+#if ISA_SHOULD_BUILD (3)
+
+# define WCSNCAT __wcsncat_generic
+# include <wcsmbs/wcsncat.c>
+
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcsncat.c b/sysdeps/x86_64/multiarch/wcsncat.c
new file mode 100644
index 0000000000..49c46aef08
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncat.c
@@ -0,0 +1,34 @@
+/* Multiple versions of wcsncat.
+ All versions must be listed in ifunc-impl-list.c.
+ 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 multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define wcsncat __redirect_wcsncat
+# include <wchar.h>
+# undef wcsncat
+
+# define SYMBOL_NAME wcsncat
+# include "ifunc-wcs.h"
+
+libc_ifunc_redirected (__redirect_wcsncat, wcsncat, IFUNC_SELECTOR ());
+# ifdef SHARED
+__hidden_ver1 (wcsncat, __GI_wcsncat, __redirect_wcsncat)
+ __attribute__((visibility ("hidden"))) __attribute_copy__ (wcsncat);
+# endif
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcsncpy-evex.S b/sysdeps/x86_64/multiarch/wcsncpy-evex.S
new file mode 100644
index 0000000000..2debb8fd6b
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncpy-evex.S
@@ -0,0 +1,7 @@
+#ifndef WCSNCPY
+# define WCSNCPY __wcsncpy_evex
+#endif
+
+#define USE_AS_WCSCPY
+#define STRNCPY WCSNCPY
+#include "strncpy-evex.S"
diff --git a/sysdeps/x86_64/multiarch/wcsncpy-generic.c b/sysdeps/x86_64/multiarch/wcsncpy-generic.c
new file mode 100644
index 0000000000..d0e8a86605
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncpy-generic.c
@@ -0,0 +1,27 @@
+/* wcsncpy.
+ 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/>. */
+
+/* We always need to build this implementation as strspn-sse4 needs to
+ be able to fallback to it. */
+#include <isa-level.h>
+#if ISA_SHOULD_BUILD (3)
+
+# define WCSNCPY __wcsncpy_generic
+# include <wcsmbs/wcsncpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/multiarch/wcsncpy.c b/sysdeps/x86_64/multiarch/wcsncpy.c
new file mode 100644
index 0000000000..5b89dd4d27
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/wcsncpy.c
@@ -0,0 +1,37 @@
+/* Multiple versions of wcsncpy.
+ All versions must be listed in ifunc-impl-list.c.
+ 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 multiple versions only for the definition in libc. */
+#if IS_IN (libc)
+# define __wcsncpy __redirect_wcsncpy
+# include <wchar.h>
+# undef __wcsncpy
+
+# define SYMBOL_NAME wcsncpy
+# include <init-arch.h>
+
+# include "ifunc-wcs.h"
+
+libc_ifunc_redirected (__redirect_wcsncpy, __wcsncpy, IFUNC_SELECTOR ());
+weak_alias (__wcsncpy, wcsncpy)
+# ifdef SHARED
+__hidden_ver1 (__wcsncpy, __GI___wcsncpy, __redirect_wcsncpy)
+ __attribute__((visibility ("hidden"))) __attribute_copy__ (wcsncpy);
+# endif
+#endif
diff --git a/sysdeps/x86_64/wcpcpy-generic.c b/sysdeps/x86_64/wcpcpy-generic.c
new file mode 100644
index 0000000000..3ddc98872f
--- /dev/null
+++ b/sysdeps/x86_64/wcpcpy-generic.c
@@ -0,0 +1,31 @@
+/* ISA level static dispatch for wcpcpy .c files.
+ 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/>. */
+
+/* wcpcpy non-multiarch build is split into two files,
+ wcpcpy-generic.c and wcpcpy.S. The wcpcpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcpcpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL <= 3
+
+# include <wcsmbs/wcpcpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/wcpcpy.S b/sysdeps/x86_64/wcpcpy.S
new file mode 100644
index 0000000000..4e4fca71eb
--- /dev/null
+++ b/sysdeps/x86_64/wcpcpy.S
@@ -0,0 +1,40 @@
+/* ISA level static dispatch for wcpcpy .S files.
+ 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/>. */
+
+/* wcpcpy non-multiarch build is split into two files,
+ wcpcpy-generic.c and wcpcpy.S. The wcpcpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcpcpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 4
+
+# define WCPCPY __wcpcpy
+
+# define DEFAULT_IMPL_V4 "multiarch/wcpcpy-evex.S"
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+ should never be used from here. */
+# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+weak_alias (__wcpcpy, wcpcpy)
+libc_hidden_def (__wcpcpy)
+#endif
diff --git a/sysdeps/x86_64/wcpncpy-generic.c b/sysdeps/x86_64/wcpncpy-generic.c
new file mode 100644
index 0000000000..0c76e5614c
--- /dev/null
+++ b/sysdeps/x86_64/wcpncpy-generic.c
@@ -0,0 +1,31 @@
+/* ISA level static dispatch for wcpncpy .c files.
+ 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/>. */
+
+/* wcpncpy non-multiarch build is split into two files,
+ wcpncpy-generic.c and wcpncpy.S. The wcpncpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcpncpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL <= 3
+
+# include <wcsmbs/wcpncpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/wcpncpy.S b/sysdeps/x86_64/wcpncpy.S
new file mode 100644
index 0000000000..b4e531473e
--- /dev/null
+++ b/sysdeps/x86_64/wcpncpy.S
@@ -0,0 +1,40 @@
+/* ISA level static dispatch for wcpcpy .S files.
+ 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/>. */
+
+/* wcpncpy non-multiarch build is split into two files,
+ wcpncpy-generic.c and wcpncpy.S. The wcpncpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcpncpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 4
+
+# define WCPNCPY __wcpncpy
+
+# define DEFAULT_IMPL_V4 "multiarch/wcpncpy-evex.S"
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+ should never be used from here. */
+# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+weak_alias (__wcpncpy, wcpncpy)
+libc_hidden_def (__wcpncpy)
+#endif
diff --git a/sysdeps/x86_64/wcscat-generic.c b/sysdeps/x86_64/wcscat-generic.c
new file mode 100644
index 0000000000..512d0e4d43
--- /dev/null
+++ b/sysdeps/x86_64/wcscat-generic.c
@@ -0,0 +1,31 @@
+/* ISA level static dispatch for wcscat .c files.
+ 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/>. */
+
+/* wcscat non-multiarch build is split into two files,
+ wcscat-generic.c and wcscat.S. The wcscat-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcscat-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL <= 3
+
+# include <wcsmbs/wcscat.c>
+
+#endif
diff --git a/sysdeps/x86_64/wcscat.S b/sysdeps/x86_64/wcscat.S
new file mode 100644
index 0000000000..ee8360b6e8
--- /dev/null
+++ b/sysdeps/x86_64/wcscat.S
@@ -0,0 +1,40 @@
+/* ISA level static dispatch for wcscat .S files.
+ 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/>. */
+
+/* wcscat non-multiarch build is split into two files,
+ wcscat-generic.c and wcscat.S. The wcscat-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcscat-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 4
+
+# define WCSCAT __wcscat
+
+# define DEFAULT_IMPL_V4 "multiarch/wcscat-evex.S"
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+ should never be used from here. */
+# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+weak_alias (__wcscat, wcscat)
+libc_hidden_def (__wcscat)
+#endif
diff --git a/sysdeps/x86_64/wcscpy.S b/sysdeps/x86_64/wcscpy.S
index 11d0bb4bab..e403579961 100644
--- a/sysdeps/x86_64/wcscpy.S
+++ b/sysdeps/x86_64/wcscpy.S
@@ -1,4 +1,4 @@
-/* wcscpy dispatch for RTLD and non-multiarch .c files
+/* ISA level static dispatch for wcscpy .S files.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -28,6 +28,7 @@
# define WCSCPY __wcscpy
+# define DEFAULT_IMPL_V4 "multiarch/wcscpy-evex.S"
# define DEFAULT_IMPL_V2 "multiarch/wcscpy-ssse3.S"
/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
should never be used from here. */
diff --git a/sysdeps/x86_64/wcsncat-generic.c b/sysdeps/x86_64/wcsncat-generic.c
new file mode 100644
index 0000000000..86e20d9028
--- /dev/null
+++ b/sysdeps/x86_64/wcsncat-generic.c
@@ -0,0 +1,31 @@
+/* ISA level static dispatch for wcsncat .c files.
+ 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/>. */
+
+/* wcsncat non-multiarch build is split into two files,
+ wcsncat-generic.c and wcsncat.S. The wcsncat-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcsncat-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL <= 3
+
+# include <wcsmbs/wcsncat.c>
+
+#endif
diff --git a/sysdeps/x86_64/wcsncat.S b/sysdeps/x86_64/wcsncat.S
new file mode 100644
index 0000000000..090055a1b8
--- /dev/null
+++ b/sysdeps/x86_64/wcsncat.S
@@ -0,0 +1,38 @@
+/* ISA level static dispatch for wcsncat .S files.
+ 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/>. */
+
+/* wcsncat non-multiarch build is split into two files,
+ wcsncat-generic.c and wcsncat.S. The wcsncat-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcsncat-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 4
+
+# define WCSNCAT wcsncat
+
+# define DEFAULT_IMPL_V4 "multiarch/wcsncat-evex.S"
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+ should never be used from here. */
+# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+#endif
diff --git a/sysdeps/x86_64/wcsncpy-generic.c b/sysdeps/x86_64/wcsncpy-generic.c
new file mode 100644
index 0000000000..0f0ee65b65
--- /dev/null
+++ b/sysdeps/x86_64/wcsncpy-generic.c
@@ -0,0 +1,31 @@
+/* ISA level static dispatch for wcsncpy .c files.
+ 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/>. */
+
+/* wcsncpy non-multiarch build is split into two files,
+ wcsncpy-generic.c and wcsncpy.S. The wcsncpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcsncpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL <= 3
+
+# include <wcsmbs/wcsncpy.c>
+
+#endif
diff --git a/sysdeps/x86_64/wcsncpy.S b/sysdeps/x86_64/wcsncpy.S
new file mode 100644
index 0000000000..32eaf1163b
--- /dev/null
+++ b/sysdeps/x86_64/wcsncpy.S
@@ -0,0 +1,40 @@
+/* ISA level static dispatch for wcsncpy .S files.
+ 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/>. */
+
+/* wcsncpy non-multiarch build is split into two files,
+ wcsncpy-generic.c and wcsncpy.S. The wcsncpy-generic.c build is
+ for ISA level <= 1 and just uses multiarch/wcsncpy-generic.c.
+ This must be split into two files because we cannot include C
+ code from assembly or vice versa. */
+
+#include <isa-level.h>
+
+#if MINIMUM_X86_ISA_LEVEL >= 4
+
+# define WCSNCPY __wcsncpy
+
+# define DEFAULT_IMPL_V4 "multiarch/wcsncpy-evex.S"
+/* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it
+ should never be used from here. */
+# define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL"
+
+# include "isa-default-impl.h"
+
+weak_alias (__wcsncpy, wcsncpy)
+libc_hidden_def (__wcsncpy)
+#endif
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2022-11-09 4:34 [glibc] x86: Add evex optimized functions for the wchar_t strcpy family Noah Goldstein
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