aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/s390
diff options
context:
space:
mode:
authorStefan Liebler <stli@linux.vnet.ibm.com>2015-08-26 10:26:25 +0200
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-08-26 10:26:25 +0200
commit2e9e166761fed5dfaa53480412bef0656f1b5306 (patch)
tree3533f977b8b80458051ec0c33b23e961a6a556da /sysdeps/s390
parent9b593dc3055d44a4179c03050be58a437ae385a1 (diff)
downloadglibc-2e9e166761fed5dfaa53480412bef0656f1b5306.tar
glibc-2e9e166761fed5dfaa53480412bef0656f1b5306.tar.gz
glibc-2e9e166761fed5dfaa53480412bef0656f1b5306.tar.bz2
glibc-2e9e166761fed5dfaa53480412bef0656f1b5306.zip
S390: Optimize wmemset.
This patch provides optimized version of wmemset with the z13 vector instructions. ChangeLog: * sysdeps/s390/multiarch/wmemset-c.c: New File. * sysdeps/s390/multiarch/wmemset-vx.S: Likewise. * sysdeps/s390/multiarch/wmemset.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add wmemset functions. * sysdeps/s390/multiarch/ifunc-impl-list-common.c (__libc_ifunc_impl_list_common): Add ifunc test for wmemset. * wcsmbs/wmemset.c: Use WMEMSET if defined. * string/test-memset.c: Add wmemset support. * wcsmbs/test-wmemset.c: New File. * wcsmbs/Makefile (strop-tests): Add wmemset. * benchtests/bench-memset.c: Add wmemset support. * benchtests/bench-wmemset.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wmemset.
Diffstat (limited to 'sysdeps/s390')
-rw-r--r--sysdeps/s390/multiarch/Makefile3
-rw-r--r--sysdeps/s390/multiarch/ifunc-impl-list.c1
-rw-r--r--sysdeps/s390/multiarch/wmemset-c.c37
-rw-r--r--sysdeps/s390/multiarch/wmemset-vx.S142
-rw-r--r--sysdeps/s390/multiarch/wmemset.c29
5 files changed, 211 insertions, 1 deletions
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index 87dff0f71d..eac88e0255 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -37,5 +37,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
wcsspn wcsspn-vx wcsspn-c \
wcspbrk wcspbrk-vx wcspbrk-c \
wcscspn wcscspn-vx wcscspn-c \
- wmemchr wmemchr-vx wmemchr-c
+ wmemchr wmemchr-vx wmemchr-c \
+ wmemset wmemset-vx wmemset-c
endif
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index c90fb6b6c7..93789acbbe 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -133,6 +133,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_VX_IMPL (memccpy);
+ IFUNC_VX_IMPL (wmemset);
#endif /* HAVE_S390_VX_ASM_SUPPORT */
return i;
diff --git a/sysdeps/s390/multiarch/wmemset-c.c b/sysdeps/s390/multiarch/wmemset-c.c
new file mode 100644
index 0000000000..cec2339c20
--- /dev/null
+++ b/sysdeps/s390/multiarch/wmemset-c.c
@@ -0,0 +1,37 @@
+/* Default wmemset 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 WMEMSET __wmemset_c
+
+# include <wchar.h>
+extern __typeof (__wmemset) __wmemset_c;
+# undef weak_alias
+# define weak_alias(name, alias)
+# ifdef SHARED
+# undef libc_hidden_def
+# define libc_hidden_def(name) \
+ __hidden_ver1 (__wmemset_c, __GI___wmemset, __wmemset_c);
+# undef libc_hidden_weak
+# define libc_hidden_weak(name) \
+ strong_alias (__wmemset_c, __wmemset_c_1); \
+ __hidden_ver1 (__wmemset_c_1, __GI_wmemset, __wmemset_c_1);
+# endif /* SHARED */
+
+# include <wcsmbs/wmemset.c>
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/wmemset-vx.S b/sysdeps/s390/multiarch/wmemset-vx.S
new file mode 100644
index 0000000000..22bddcd3a3
--- /dev/null
+++ b/sysdeps/s390/multiarch/wmemset-vx.S
@@ -0,0 +1,142 @@
+/* Vector Optimized 32/64 bit S/390 version of wmemset.
+ 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 *wmemset(wchar_t *dest, wchar_t wc, size_t n)
+ Fill an array of wide-characters with a constant wide character
+ and returns dest.
+
+ Register usage:
+ -r0=tmp
+ -r1=tmp
+ -r2=dest or current-pointer
+ -r3=wc
+ -r4=n
+ -r5=tmp
+ -v16=replicated wc
+ -v17,v18,v19=copy of v16 for vstm
+ -v31=saved dest for return
+*/
+ENTRY(__wmemset_vx)
+ .machine "z13"
+ .machinemode "zarch_nohighgprs"
+
+# if !defined __s390x__
+ llgfr %r4,%r4
+# endif /* !defined __s390x__ */
+
+ vlvgg %v31,%r2,0 /* Save destination pointer for return. */
+ clgije %r4,0,.Lend
+
+ vlvgf %v16,%r3,0 /* Generate vector with wchar_t wc. */
+ vrepf %v16,%v16,0
+
+ /* Check range of maxlen and convert to byte-count. */
+# ifdef __s390x__
+ tmhh %r4,49152 /* Test bit 0 or 1 of maxlen. */
+ lghi %r5,-4 /* Max byte-count is 18446744073709551612. */
+# else
+ tmlh %r4,49152 /* Test bit 0 or 1 of maxlen. */
+ llilf %r5,4294967292 /* Max byte-count is 4294967292. */
+# endif /* !__s390x__ */
+ sllg %r4,%r4,2 /* Convert character-count to byte-count. */
+ locgrne %r4,%r5 /* Use max byte-count, if bit 0/1 was one. */
+
+ /* Align dest to 16 byte. */
+ risbg %r0,%r2,60,128+63,0 /* Test if s is aligned and
+ %r3 = bits 60-63 'and' 15. */
+ je .Lpreloop /* If s is aligned, loop aligned. */
+ tmll %r2,3 /* Test if s is 4-byte aligned? */
+ jne .Lfallback /* And use common-code variant if not. */
+ lghi %r1,16
+ slr %r1,%r0 /* Compute byte count to load (16-x). */
+ clgr %r1,%r4
+ locgrh %r1,%r4 /* min (byte count, n) */
+ aghik %r5,%r1,-1 /* vstl needs highest index. */
+ vstl %v16,%r5,0(%r2) /* Store remaining bytes. */
+ clgrje %r1,%r4,.Lend /* Return if n bytes where set. */
+ slgr %r4,%r1 /* Compute remaining byte count. */
+ la %r2,0(%r1,%r2)
+
+.Lpreloop:
+ /* Now we are 16-byte aligned. */
+ clgijl %r4,17,.Lremaining
+ srlg %r1,%r4,8 /* Split into 256byte blocks */
+ clgije %r1,0,.Lpreloop64
+ vlr %v17,%v16
+ vlr %v18,%v16
+ vlr %v19,%v16
+
+.Lloop256:
+ vstm %v16,%v19,0(%r2)
+ vstm %v16,%v19,64(%r2)
+ vstm %v16,%v19,128(%r2)
+ vstm %v16,%v19,192(%r2)
+ la %r2,256(%r2)
+ brctg %r1,.Lloop256 /* Loop until all blocks are processed. */
+
+ llgfr %r4,%r4
+ nilf %r4,255 /* Get remaining bytes */
+ je .Lend /* Skip store remaining bytes if zero. */
+
+.Lpreloop64:
+ clgijl %r4,17,.Lremaining
+ clgijl %r4,33,.Lpreloop16
+ srlg %r1,%r4,5 /* Split into 32byte blocks */
+
+.Lloop32:
+ vst %v16,0(%r2)
+ vst %v16,16(%r2)
+ la %r2,32(%r2)
+ brctg %r1,.Lloop32 /* Loop until all blocks are processed. */
+
+ llgfr %r4,%r4
+ nilf %r4,31 /* Get remaining bytes */
+ je .Lend /* Skip store remaining bytes if zero. */
+
+.Lpreloop16:
+ clgijl %r4,17,.Lremaining
+ srlg %r1,%r4,4 /* Split into 16byte blocks */
+
+.Lloop16:
+ vst %v16,0(%r2)
+ la %r2,16(%r2)
+ brctg %r1,.Lloop16 /* Loop until all blocks are processed. */
+
+ llgfr %r4,%r4
+ nilf %r4,15 /* Get remaining bytes */
+ je .Lend /* Skip store remaining bytes if zero. */
+
+.Lremaining:
+ aghi %r4,-1 /* vstl needs highest index. */
+ vstl %v16,%r4,0(%r2)
+
+.Lend:
+ vlgvg %r2,%v31,0 /* Load saved dest for return value. */
+ br %r14
+.Lfallback:
+ srlg %r4,%r4,2 /* Convert byte-count to character-count. */
+ jg __wmemset_c
+END(__wmemset_vx)
+#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
diff --git a/sysdeps/s390/multiarch/wmemset.c b/sysdeps/s390/multiarch/wmemset.c
new file mode 100644
index 0000000000..884fea932c
--- /dev/null
+++ b/sysdeps/s390/multiarch/wmemset.c
@@ -0,0 +1,29 @@
+/* Multiple versions of wmemset.
+ 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 (__wmemset)
+weak_alias (__wmemset, wmemset)
+libc_hidden_weak (wmemset)
+
+#else
+# include <wcsmbs/wmemset.c>
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */