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[PATCH 12/27] S390: Optimize stpncpy and wcpncpy.
- From: Stefan Liebler <stli at linux dot vnet dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Cc: Stefan Liebler <stli at linux dot vnet dot ibm dot com>
- Date: Fri, 26 Jun 2015 13:51:37 +0200
- Subject: [PATCH 12/27] S390: Optimize stpncpy and wcpncpy.
- Authentication-results: sourceware.org; auth=none
- References: <1435319512-22245-1-git-send-email-stli at linux dot vnet dot ibm dot com>
This patch provides optimized versions of stpncpy and wcpncpy with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/stpncpy-c.c: New File.
* sysdeps/s390/multiarch/stpncpy-vx.S: Likewise.
* sysdeps/s390/multiarch/stpncpy.c: Likewise.
* sysdeps/s390/multiarch/wcpncpy-c.c: Likewise.
* sysdeps/s390/multiarch/wcpncpy-vx.S: Likewise.
* sysdeps/s390/multiarch/wcpncpy.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add stpncpy and
wcpncpy functions.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for stpncpy, wcpncpy.
* wcsmbs/wcpncpy.c: Use WCPNCPY if defined.
* string/test-stpncpy.c: Add wcpncpy support.
* wcsmbs/test-wcpncpy.c: New File.
* wcsmbs/Makefile (strop-tests): Add wcpncpy.
* benchtests/bench-stpncpy.c: Add wcpncpy support.
* benchtests/bench-wcpncpy.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcpncpy.
---
benchtests/Makefile | 2 +-
benchtests/bench-stpncpy.c | 41 +++++--
benchtests/bench-wcpncpy.c | 20 ++++
string/test-stpncpy.c | 41 +++++--
sysdeps/s390/multiarch/Makefile | 6 +-
sysdeps/s390/multiarch/ifunc-impl-list.c | 3 +
sysdeps/s390/multiarch/stpncpy-c.c | 28 +++++
sysdeps/s390/multiarch/stpncpy-vx.S | 174 ++++++++++++++++++++++++++++
sysdeps/s390/multiarch/stpncpy.c | 28 +++++
sysdeps/s390/multiarch/wcpncpy-c.c | 25 ++++
sysdeps/s390/multiarch/wcpncpy-vx.S | 192 +++++++++++++++++++++++++++++++
sysdeps/s390/multiarch/wcpncpy.c | 28 +++++
wcsmbs/Makefile | 2 +-
wcsmbs/test-wcpncpy.c | 20 ++++
wcsmbs/wcpncpy.c | 5 +
15 files changed, 589 insertions(+), 26 deletions(-)
create mode 100644 benchtests/bench-wcpncpy.c
create mode 100644 sysdeps/s390/multiarch/stpncpy-c.c
create mode 100644 sysdeps/s390/multiarch/stpncpy-vx.S
create mode 100644 sysdeps/s390/multiarch/stpncpy.c
create mode 100644 sysdeps/s390/multiarch/wcpncpy-c.c
create mode 100644 sysdeps/s390/multiarch/wcpncpy-vx.S
create mode 100644 sysdeps/s390/multiarch/wcpncpy.c
create mode 100644 wcsmbs/test-wcpncpy.c
diff --git a/benchtests/Makefile b/benchtests/Makefile
index 3785328..c3531a9 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -36,7 +36,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
strcoll
-wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy
+wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy
string-bench-all := $(string-bench) ${wcsmbs-bench}
# We have to generate locales
diff --git a/benchtests/bench-stpncpy.c b/benchtests/bench-stpncpy.c
index 53539c7..822db1f 100644
--- a/benchtests/bench-stpncpy.c
+++ b/benchtests/bench-stpncpy.c
@@ -18,18 +18,36 @@
#define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
#define TEST_MAIN
-#define TEST_NAME "stpncpy"
+#ifndef WIDE
+# define TEST_NAME "stpncpy"
+#else
+# define TEST_NAME "wcpncpy"
+#endif /* WIDE */
#include "bench-string.h"
+#ifndef WIDE
+# define CHAR char
+# define SIMPLE_STPNCPY simple_stpncpy
+# define STUPID_STPNCPY stupid_stpncpy
+# define STPNCPY stpncpy
+# define STRNLEN strnlen
+#else
+# include <wchar.h>
+# define CHAR wchar_t
+# define SIMPLE_STPNCPY simple_wcpncpy
+# define STUPID_STPNCPY stupid_wcpncpy
+# define STPNCPY wcpncpy
+# define STRNLEN wcsnlen
+#endif /* WIDE */
-char *simple_stpncpy (char *, const char *, size_t);
-char *stupid_stpncpy (char *, const char *, size_t);
+CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
+CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
-IMPL (stupid_stpncpy, 0)
-IMPL (simple_stpncpy, 0)
-IMPL (stpncpy, 1)
+IMPL (STUPID_STPNCPY, 0)
+IMPL (SIMPLE_STPNCPY, 0)
+IMPL (STPNCPY, 1)
-char *
-simple_stpncpy (char *dst, const char *src, size_t n)
+CHAR *
+SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
{
while (n--)
if ((*dst++ = *src++) == '\0')
@@ -43,10 +61,10 @@ simple_stpncpy (char *dst, const char *src, size_t n)
return dst;
}
-char *
-stupid_stpncpy (char *dst, const char *src, size_t n)
+CHAR *
+STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
{
- size_t nc = strnlen (src, n);
+ size_t nc = STRNLEN (src, n);
size_t i;
for (i = 0; i < nc; ++i)
@@ -56,4 +74,5 @@ stupid_stpncpy (char *dst, const char *src, size_t n)
return dst + nc;
}
+#undef CHAR
#include "bench-strncpy.c"
diff --git a/benchtests/bench-wcpncpy.c b/benchtests/bench-wcpncpy.c
new file mode 100644
index 0000000..8aa529e
--- /dev/null
+++ b/benchtests/bench-wcpncpy.c
@@ -0,0 +1,20 @@
+/* Measure wcpncpy functions.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#define WIDE 1
+#include "bench-stpncpy.c"
diff --git a/string/test-stpncpy.c b/string/test-stpncpy.c
index 1adab34..8624bba 100644
--- a/string/test-stpncpy.c
+++ b/string/test-stpncpy.c
@@ -19,18 +19,36 @@
#define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
#define TEST_MAIN
-#define TEST_NAME "stpncpy"
+#ifndef WIDE
+# define TEST_NAME "stpncpy"
+#else
+# define TEST_NAME "wcpncpy"
+#endif /* WIDE */
#include "test-string.h"
+#ifndef WIDE
+# define CHAR char
+# define SIMPLE_STPNCPY simple_stpncpy
+# define STUPID_STPNCPY stupid_stpncpy
+# define STPNCPY stpncpy
+# define STRNLEN strnlen
+#else
+# include <wchar.h>
+# define CHAR wchar_t
+# define SIMPLE_STPNCPY simple_wcpncpy
+# define STUPID_STPNCPY stupid_wcpncpy
+# define STPNCPY wcpncpy
+# define STRNLEN wcsnlen
+#endif /* WIDE */
-char *simple_stpncpy (char *, const char *, size_t);
-char *stupid_stpncpy (char *, const char *, size_t);
+CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
+CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
-IMPL (stupid_stpncpy, 0)
-IMPL (simple_stpncpy, 0)
-IMPL (stpncpy, 1)
+IMPL (STUPID_STPNCPY, 0)
+IMPL (SIMPLE_STPNCPY, 0)
+IMPL (STPNCPY, 1)
-char *
-simple_stpncpy (char *dst, const char *src, size_t n)
+CHAR *
+SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
{
while (n--)
if ((*dst++ = *src++) == '\0')
@@ -44,10 +62,10 @@ simple_stpncpy (char *dst, const char *src, size_t n)
return dst;
}
-char *
-stupid_stpncpy (char *dst, const char *src, size_t n)
+CHAR *
+STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
{
- size_t nc = strnlen (src, n);
+ size_t nc = STRNLEN (src, n);
size_t i;
for (i = 0; i < nc; ++i)
@@ -57,4 +75,5 @@ stupid_stpncpy (char *dst, const char *src, size_t n)
return dst + nc;
}
+#undef CHAR
#include "test-strncpy.c"
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 0dff2dc..98b588f 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -3,7 +3,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
strnlen strnlen-vx strnlen-c \
strcpy strcpy-vx \
stpcpy stpcpy-vx stpcpy-c \
- strncpy strncpy-vx
+ strncpy strncpy-vx \
+ stpncpy stpncpy-vx stpncpy-c
endif
ifeq ($(subdir),wcsmbs)
@@ -11,5 +12,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcsnlen wcsnlen-vx wcsnlen-c \
wcscpy wcscpy-vx wcscpy-c \
wcpcpy wcpcpy-vx wcpcpy-c \
- wcsncpy wcsncpy-vx wcsncpy-c
+ wcsncpy wcsncpy-vx wcsncpy-c \
+ wcpncpy wcpncpy-vx wcpncpy-c
endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index 940421d..ca69983 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -94,6 +94,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_VX_IMPL (strncpy);
IFUNC_VX_IMPL (wcsncpy);
+ IFUNC_VX_IMPL (stpncpy);
+ IFUNC_VX_IMPL (wcpncpy);
+
#endif /* HAVE_S390_VX_ASM_SUPPORT */
return i;
diff --git a/sysdeps/s390/multiarch/stpncpy-c.c b/sysdeps/s390/multiarch/stpncpy-c.c
new file mode 100644
index 0000000..bea15fa
--- /dev/null
+++ b/sysdeps/s390/multiarch/stpncpy-c.c
@@ -0,0 +1,28 @@
+/* Default stpncpy implementation for S/390.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# define STPNCPY __stpncpy_c
+# ifdef SHARED
+# undef libc_hidden_def
+# define libc_hidden_def(name) \
+ __hidden_ver1 (__stpncpy_c, __GI___stpncpy, __stpncpy_c);
+# endif /* SHARED */
+
+# include <string/stpncpy.c>
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/stpncpy-vx.S b/sysdeps/s390/multiarch/stpncpy-vx.S
new file mode 100644
index 0000000..368699b
--- /dev/null
+++ b/sysdeps/s390/multiarch/stpncpy-vx.S
@@ -0,0 +1,174 @@
+/* Vector optimized 32/64 bit S/390 version of stpncpy.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+
+# include "sysdep.h"
+# include "asm-syntax.h"
+
+ .text
+
+/* char * stpncpy (char *dest, const char *src, size_t n)
+ Copies at most n characters of string src to dest
+ returning a pointer to its end or dest+n
+ if src is smaller than n.
+
+ Register usage:
+ -%r0 = return value
+ -%r1 = zero byte index
+ -%r2 = curr dst pointer
+ -%r3 = curr src pointer
+ -%r4 = n
+ -%r5 = current_len
+ -%r6 = loaded bytes
+ -%r7 = border, tmp
+*/
+ENTRY(__stpncpy_vx)
+ .machine "z13"
+ .machinemode "zarch_nohighgprs"
+
+# if !defined __s390x__
+ llgfr %r4,%r4
+# endif /* !defined __s390x__ */
+
+ clgfi %r4,0
+ ber %r14 /* Nothing to do, if n == 0. */
+
+ la %r0,0(%r4,%r2) /* Save destination pointer + n for return. */
+ vlvgp %v31,%r6,%r7 /* Save registers. */
+ lghi %r5,0 /* current_len = 0. */
+
+ /* Align s to 16 byte */
+ risbg %r1,%r3,60,128+63,0 /* Test if s is aligned and
+ %r1 = bits 60-63 'and' 15. */
+ je .Lpreloop1 /* If s is aligned, loop aligned. */
+ lghi %r6,15
+ slr %r6,%r1 /* Compute highest index to load (15-x). */
+ vll %v16,%r6,0(%r3) /* Load up to 16byte boundary. (vll needs
+ highest index, remaining bytes are 0.) */
+ lgr %r7,%r6 /* Copy of highest index */
+ ahi %r6,1 /* Work with loaded byte count. */
+ clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes
+ -> process remaining. */
+ /* n > loaded-byte-count */
+ vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */
+ vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
+ clrjle %r1,%r7,.Lfound_v16_store /* Found zero within loaded bytes,
+ copy and return. */
+ /* Zero not found and n > loaded-byte-count. */
+ vstl %v16,%r7,0(%r2) /* Copy loaded characters - no zero. */
+ lgr %r5,%r6 /* No zero within loaded bytes,
+ start aligned loop at next character. */
+.Lpreloop1:
+ /* Now we are 16byte aligned, so we can load a full vreg
+ without page fault. */
+ vl %v16,0(%r5,%r3) /* Load s. */
+ clgijl %r4,17,.Lremaining_v16 /* If n <= 16, process remaining
+ bytes. */
+ lgr %r7,%r4
+ slgfi %r7,16 /* border_len = n - 16. */
+ j .Lloop1
+
+ /* Find zero in 16byte aligned loop. */
+.Lloop2:
+ vl %v16,16(%r5,%r3)
+ vst %v18,0(%r5,%r2)
+ aghi %r5,16
+
+.Lloop1:
+ clgrjhe %r5,%r7,.Lremaining_v16 /* If current_len >= border
+ then process remaining bytes. */
+ vfenezbs %v17,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound_v16 /* Jump away if zero was found. */
+ vl %v18,16(%r5,%r3) /* Load next part of s. */
+ vst %v16,0(%r5,%r2) /* Save previous part without zero to dst. */
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v18
+ vfenezbs %v17,%v18,%v18
+ je .Lfound_v18
+ vl %v16,16(%r5,%r3)
+ vst %v18,0(%r5,%r2)
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v16
+ vfenezbs %v17,%v16,%v16
+ je .Lfound_v16
+ vl %v18,16(%r5,%r3)
+ vst %v16,0(%r5,%r2)
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v18
+ vfenezbs %v17,%v18,%v18
+ jo .Lloop2 /* No zero found -> loop. */
+
+.Lfound_v18:
+ vlr %v16,%v18
+.Lfound_v16:
+ /* v16 contains a zero. Store remaining bytes to zero. current_len
+ has not reached border, thus checking for n is not needed! */
+ vlgvb %r1,%v17,7 /* Load byte index of zero. */
+ la %r2,0(%r5,%r2) /* vstl has no support for index-register. */
+.Lfound_v16_store:
+ vstl %v16,%r1,0(%r2) /* Copy characters including zero. */
+ /* Fill remaining bytes with zero - remaining count always > 0. */
+ algr %r5,%r1 /* Remaining bytes (=%r4) = ... */
+ slgr %r4,%r5 /* = maxlen - (currlen + zero_index + 1) */
+ la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */
+ lgr %r0,%r2 /* Save return-pointer to found zero. */
+ clgije %r4,1,.Lend /* Skip zero-filling, if found zero is last
+ possible character.
+ (1 is substracted from r4 below!). */
+ aghi %r4,-2 /* mvc with exrl needs count - 1.
+ (additional -1, see remaining bytes above) */
+ srlg %r6,%r4,8 /* Split into 256 byte blocks. */
+ ltgr %r6,%r6
+ je .Lzero_lt256
+.Lzero_loop256:
+ mvc 1(256,%r2),0(%r2) /* Fill 256 zeros at once. */
+ la %r2,256(%r2)
+ brctg %r6,.Lzero_loop256 /* Loop until all blocks are processed. */
+.Lzero_lt256:
+ exrl %r4,.Lmvc_lt256
+ j .Lend
+.Lmvc_lt256:
+ mvc 1(1,%r2),0(%r2)
+
+.Lremaining_v18:
+ vlr %v16,%v18
+.Lremaining_v16:
+ /* v16 contains the remaining bytes [1...16].
+ Store remaining bytes and append string-termination. */
+ vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */
+ slgrk %r7,%r4,%r5 /* Remaining bytes = maxlen - current_len */
+ aghi %r7,-1 /* vstl needs highest index. */
+ la %r2,0(%r5,%r2) /* vstl has no index register. */
+ vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
+ clrj %r1,%r7,12,.Lfound_v16_store /* Zero in remaining bytes?
+ -> jump away. */
+ vstl %v16,%r7,0(%r2) /* Store remaining bytes without null
+ termination! */
+.Lend:
+ /* Restore saved registers. */
+ vlgvg %r6,%v31,0
+ vlgvg %r7,%v31,1
+.Lend2:
+ lgr %r2,%r0 /* Load saved dest-ptr. */
+ br %r14
+END(__stpncpy_vx)
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/stpncpy.c b/sysdeps/s390/multiarch/stpncpy.c
new file mode 100644
index 0000000..cf8e56c
--- /dev/null
+++ b/sysdeps/s390/multiarch/stpncpy.c
@@ -0,0 +1,28 @@
+/* Multiple versions of stpncpy.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# include <string.h>
+# include <ifunc-resolve.h>
+
+s390_vx_libc_ifunc (__stpncpy)
+weak_alias (__stpncpy, stpncpy)
+
+#else
+# include <string/stpncpy.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
diff --git a/sysdeps/s390/multiarch/wcpncpy-c.c b/sysdeps/s390/multiarch/wcpncpy-c.c
new file mode 100644
index 0000000..9810e52
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcpncpy-c.c
@@ -0,0 +1,25 @@
+/* Default wcsncpy implementation for S/390.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# define WCPNCPY __wcpncpy_c
+
+# include <wchar.h>
+extern __typeof (__wcpncpy) __wcpncpy_c;
+# include <wcsmbs/wcpncpy.c>
+#endif
diff --git a/sysdeps/s390/multiarch/wcpncpy-vx.S b/sysdeps/s390/multiarch/wcpncpy-vx.S
new file mode 100644
index 0000000..9e33ae8
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcpncpy-vx.S
@@ -0,0 +1,192 @@
+/* Vector optimized 32/64 bit S/390 version of wcpncpy.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+
+# include "sysdep.h"
+# include "asm-syntax.h"
+
+ .text
+
+/* wchar_t * wcpncpy (wchar_t *dest, const wchar_t *src, size_t n)
+ Copies at most n characters of string src to dest
+ returning a pointer to its end or dest+n
+ if src is smaller than n.
+
+ Register usage:
+ -%r0 = return value
+ -%r1 = zero byte index
+ -%r2 = curr dst pointer
+ -%r3 = curr src pointer
+ -%r4 = n
+ -%r5 = current_len
+ -%r6 = loaded bytes
+ -%r7 = border, tmp
+*/
+ENTRY(__wcpncpy_vx)
+ .machine "z13"
+ .machinemode "zarch_nohighgprs"
+
+# if !defined __s390x__
+ llgfr %r4,%r4
+# endif /* !defined __s390x__ */
+
+ clgfi %r4,0
+ ber %r14 /* Nothing to do, if n == 0. */
+
+ /* Check range of maxlen and convert to byte-count. */
+# ifdef __s390x__
+ tmhh %r4,49152 /* Test bit 0 or 1 of maxlen. */
+ lghi %r1,-4 /* Max byte-count is 18446744073709551612. */
+# else
+ tmlh %r4,49152 /* Test bit 0 or 1 of maxlen. */
+ llilf %r1,4294967292 /* Max byte-count is 4294967292. */
+# endif /* !__s390x__ */
+ sllg %r4,%r4,2 /* Convert character-count to byte-count. */
+ locgrne %r4,%r1 /* Use max byte-count, if bit 0/1 was one. */
+
+ la %r0,0(%r4,%r2) /* Save destination pointer + n for return. */
+ vlvgp %v31,%r6,%r7 /* Save registers. */
+ lghi %r5,0 /* current_len = 0. */
+
+ /* Align s to 16 byte */
+ risbg %r1,%r3,60,128+63,0 /* Test if s is aligned and
+ %r1 = bits 60-63 'and' 15. */
+ je .Lpreloop1 /* If s is aligned, loop aligned. */
+ tmll %r3,3 /* Test if s is 4-byte aligned? */
+ jne .Lfallback /* And use common-code variant instead. */
+ lghi %r6,15
+ slr %r6,%r1 /* Compute highest index to load (15-x). */
+ vll %v16,%r6,0(%r3) /* Load up to 16 byte boundary. (vll needs
+ highest index, remaining bytes are 0.) */
+ lgr %r7,%r6 /* Copy of highest index */
+ ahi %r6,1 /* Work with loaded byte count. */
+ clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes
+ -> process remaining. */
+ /* n > loaded-byte-count */
+ vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */
+ vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
+ aghi %r1,3 /* Also copy remaining bytes of zero. */
+ clrjle %r1,%r7,.Lfound_v16_store /* Found zero within loaded bytes,
+ copy and return. */
+ /* Zero not found and n > loaded-byte-count. */
+ vstl %v16,%r7,0(%r2) /* Copy loaded characters - no zero. */
+ lgr %r5,%r6 /* No zero within loaded bytes,
+ start aligned loop at next character. */
+.Lpreloop1:
+ /* Now we are 16byte aligned, so we can load a full vreg
+ without page fault. */
+ vl %v16,0(%r5,%r3) /* Load s. */
+ clgijl %r4,17,.Lremaining_v16 /* If n <=16,
+ process remaining bytes. */
+ lgr %r7,%r4
+ slgfi %r7,16 /* border_len = n - 16. */
+ j .Lloop1
+
+ /* Find zero in 16byte aligned loop. */
+.Lloop2:
+ vl %v16,16(%r5,%r3)
+ vst %v18,0(%r5,%r2)
+ aghi %r5,16
+
+.Lloop1:
+ clgrjhe %r5,%r7,.Lremaining_v16 /* If current_len >= border
+ then process remaining bytes. */
+ vfenezfs %v17,%v16,%v16 /* Find element not equal with zero search. */
+ je .Lfound_v16 /* Jump away if zero was found. */
+ vl %v18,16(%r5,%r3) /* Load next part of s. */
+ vst %v16,0(%r5,%r2) /* Store previous part without zero to dst. */
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v18
+ vfenezfs %v17,%v18,%v18
+ je .Lfound_v18
+ vl %v16,16(%r5,%r3)
+ vst %v18,0(%r5,%r2)
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v16
+ vfenezfs %v17,%v16,%v16
+ je .Lfound_v16
+ vl %v18,16(%r5,%r3)
+ vst %v16,0(%r5,%r2)
+ aghi %r5,16
+
+ clgrjhe %r5,%r7,.Lremaining_v18
+ vfenezfs %v17,%v18,%v18
+ jo .Lloop2 /* No zero found -> loop. */
+
+.Lfound_v18:
+ vlr %v16,%v18
+.Lfound_v16:
+ /* v16 contains a zero. Store remaining bytes to zero. current_len
+ has not reached border, thus checking for n is not needed! */
+ vlgvb %r1,%v17,7 /* Load byte index of zero. */
+ la %r2,0(%r5,%r2) /* vstl has no support for index-register. */
+ aghi %r1,3 /* Also copy remaining bytes of zero. */
+.Lfound_v16_store:
+ vstl %v16,%r1,0(%r2) /* Copy characters including zero. */
+ /* Fill remaining bytes with zero - remaining byte count always > 0. */
+ algr %r5,%r1 /* Remaining bytes (=%r4) = ... */
+ slgr %r4,%r5 /* = n - (currlen + zero_index + 1) */
+ la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */
+ lay %r0,-3(%r2) /* Save return-pointer to found zero. */
+ clgije %r4,1,.Lend /* Skip zero-filling, if found-zero is last
+ possible character.
+ (1 is substracted from r4 below!). */
+ aghi %r4,-2 /* mvc with exrl needs count - 1.
+ (additional -1, see remaining bytes above) */
+ srlg %r6,%r4,8 /* Split into 256 byte blocks. */
+ ltgr %r6,%r6
+ je .Lzero_lt256
+.Lzero_loop256:
+ mvc 1(256,%r2),0(%r2) /* Fill 256 zeros at once. */
+ la %r2,256(%r2)
+ brctg %r6,.Lzero_loop256 /* Loop until all blocks are processed. */
+.Lzero_lt256:
+ exrl %r4,.Lmvc_lt256
+ j .Lend
+.Lmvc_lt256:
+ mvc 1(1,%r2),0(%r2)
+
+.Lremaining_v18:
+ vlr %v16,%v18
+.Lremaining_v16:
+ /* v16 contains the remaining bytes [1...16].
+ Store remaining bytes and append string-termination. */
+ vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */
+ slgrk %r7,%r4,%r5 /* Remaining bytes = maxlen - current_len */
+ aghi %r7,-1 /* vstl needs highest index. */
+ la %r2,0(%r5,%r2) /* vstl has no index register. */
+ vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
+ aghi %r1,3 /* Also copy remaining bytes of zero. */
+ clrjle %r1,%r7,.Lfound_v16_store /* Zero in remaining bytes?
+ -> jump away. */
+ vstl %v16,%r7,0(%r2) /* Store remaining bytes without null
+ termination! */
+.Lend:
+ /* Restore saved registers. */
+ vlgvg %r6,%v31,0
+ vlgvg %r7,%v31,1
+ lgr %r2,%r0 /* Load saved dest-ptr. */
+ br %r14
+.Lfallback:
+ srlg %r4,%r4,2 /* Convert byte-count to character-count. */
+ jg __wcpncpy_c
+END(__wcpncpy_vx)
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/wcpncpy.c b/sysdeps/s390/multiarch/wcpncpy.c
new file mode 100644
index 0000000..e15acb7
--- /dev/null
+++ b/sysdeps/s390/multiarch/wcpncpy.c
@@ -0,0 +1,28 @@
+/* Multiple versions of wcpncpy.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
+# include <wchar.h>
+# include <ifunc-resolve.h>
+
+s390_vx_libc_ifunc (__wcpncpy)
+weak_alias (__wcpncpy, wcpncpy)
+
+#else
+# include <wcsmbs/wcpncpy.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
diff --git a/wcsmbs/Makefile b/wcsmbs/Makefile
index 426eab0..1d07c51 100644
--- a/wcsmbs/Makefile
+++ b/wcsmbs/Makefile
@@ -43,7 +43,7 @@ routines := wcscat wcschr wcscmp wcscpy wcscspn wcsdup wcslen wcsncat \
mbrtoc16 c16rtomb
strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \
- wcpcpy wcsncpy
+ wcpcpy wcsncpy wcpncpy
tests := tst-wcstof wcsmbs-tst1 tst-wcsnlen tst-btowc tst-mbrtowc \
tst-wcrtomb tst-wcpncpy tst-mbsrtowcs tst-wchar-h tst-mbrtowc2 \
tst-c16c32-1 wcsatcliff $(addprefix test-,$(strop-tests))
diff --git a/wcsmbs/test-wcpncpy.c b/wcsmbs/test-wcpncpy.c
new file mode 100644
index 0000000..de302b4
--- /dev/null
+++ b/wcsmbs/test-wcpncpy.c
@@ -0,0 +1,20 @@
+/* Test wcpncpy functions.
+ Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#define WIDE 1
+#include "../string/test-stpncpy.c"
diff --git a/wcsmbs/wcpncpy.c b/wcsmbs/wcpncpy.c
index 98c77a5..e19e44c 100644
--- a/wcsmbs/wcpncpy.c
+++ b/wcsmbs/wcpncpy.c
@@ -18,6 +18,9 @@
#include <wchar.h>
+#ifdef WCPNCPY
+# define __wcpncpy WCPNCPY
+#endif
/* Copy no more than N wide-characters of SRC to DEST, returning the
address of the last character written into DEST. */
@@ -82,4 +85,6 @@ __wcpncpy (dest, src, n)
return dest - 1;
}
+#ifndef WCPNCPY
weak_alias (__wcpncpy, wcpncpy)
+#endif
--
1.8.4.2