diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index db060c8..a9882b3 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -41,5 +41,6 @@ sysdep_routines += bzero memset memset-z900 \
strnlen strnlen-vx strnlen-c \
strcpy strcpy-vx strcpy-z900 \
stpcpy stpcpy-vx stpcpy-c \
- strncpy strncpy-vx strncpy-z900
+ strncpy strncpy-vx strncpy-z900 \
+ stpncpy stpncpy-vx stpncpy-c
endif
diff --git a/sysdeps/s390/ifunc-stpncpy.h b/sysdeps/s390/ifunc-stpncpy.h
new file mode 100644
index 0000000..46e5733
--- /dev/null
+++ b/sysdeps/s390/ifunc-stpncpy.h
@@ -0,0 +1,52 @@
+/* stpncpy variant information on S/390 version.
+ Copyright (C) 2018 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
+ . */
+
+#if defined USE_MULTIARCH && IS_IN (libc) \
+ && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define HAVE_STPNCPY_IFUNC 1
+#else
+# define HAVE_STPNCPY_IFUNC 0
+#endif
+
+#ifdef HAVE_S390_VX_ASM_SUPPORT
+# define HAVE_STPNCPY_IFUNC_AND_VX_SUPPORT HAVE_STPNCPY_IFUNC
+#else
+# define HAVE_STPNCPY_IFUNC_AND_VX_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+# define STPNCPY_DEFAULT STPNCPY_Z13
+# define HAVE_STPNCPY_C 0
+# define HAVE_STPNCPY_Z13 1
+#else
+# define STPNCPY_DEFAULT STPNCPY_C
+# define HAVE_STPNCPY_C 1
+# define HAVE_STPNCPY_Z13 HAVE_STPNCPY_IFUNC_AND_VX_SUPPORT
+#endif
+
+#if HAVE_STPNCPY_C
+# define STPNCPY_C __stpncpy_c
+#else
+# define STPNCPY_C NULL
+#endif
+
+#if HAVE_STPNCPY_Z13
+# define STPNCPY_Z13 __stpncpy_vx
+#else
+# define STPNCPY_Z13 NULL
+#endif
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index c5189b5..3d97d21 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -1,6 +1,5 @@
ifeq ($(subdir),string)
-sysdep_routines += stpncpy stpncpy-vx stpncpy-c \
- strcat strcat-vx strcat-c \
+sysdep_routines += strcat strcat-vx strcat-c \
strncat strncat-vx strncat-c \
strcmp strcmp-vx \
strncmp strncmp-vx strncmp-c \
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c
index d598fc5..021e9f2 100644
--- a/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -31,6 +31,7 @@
#include
#include
#include
+#include
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -229,6 +230,18 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
)
#endif /* HAVE_STRNCPY_IFUNC */
+#if HAVE_STPNCPY_IFUNC
+ IFUNC_IMPL (i, name, stpncpy,
+# if HAVE_STPNCPY_Z13
+ IFUNC_IMPL_ADD (array, i, stpncpy,
+ dl_hwcap & HWCAP_S390_VX, STPNCPY_Z13)
+# endif
+# if HAVE_STPNCPY_C
+ IFUNC_IMPL_ADD (array, i, stpncpy, 1, STPNCPY_C)
+# endif
+ )
+#endif /* HAVE_STPNCPY_IFUNC */
+
#ifdef HAVE_S390_VX_ASM_SUPPORT
@@ -248,7 +261,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_VX_IMPL (wcsncpy);
- IFUNC_VX_IMPL (stpncpy);
IFUNC_VX_IMPL (wcpncpy);
IFUNC_VX_IMPL (strcat);
diff --git a/sysdeps/s390/multiarch/stpncpy-c.c b/sysdeps/s390/multiarch/stpncpy-c.c
deleted file mode 100644
index 45e50aa..0000000
--- a/sysdeps/s390/multiarch/stpncpy-c.c
+++ /dev/null
@@ -1,28 +0,0 @@
-/* Default stpncpy implementation for S/390.
- Copyright (C) 2015-2018 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
- . */
-
-#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
-#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
deleted file mode 100644
index 922bd7a..0000000
--- a/sysdeps/s390/multiarch/stpncpy-vx.S
+++ /dev/null
@@ -1,200 +0,0 @@
-/* Vector optimized 32/64 bit S/390 version of stpncpy.
- Copyright (C) 2015-2018 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
- . */
-
-#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. */
-
- vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */
- lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */
- llgfr %r6,%r6 /* Convert 32bit to 64bit. */
-
- lghi %r5,0 /* current_len = 0. */
-
- 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. */
- clrjl %r1,%r6,.Lfound_v16_store /* Found zero within loaded bytes,
- copy and return. */
-
- /* Align s to 16 byte. */
- risbgn %r7,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
- lghi %r5,15 /* current_len = 15. */
- slr %r5,%r7 /* Compute highest index to 16byte boundary. */
-
- /* Zero not found and n > loaded-byte-count. */
- vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */
- ahi %r5,1 /* Start loop at next character. */
-
- /* Now we are 16byte aligned, so we can load a full vreg
- without page fault. */
- lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
- aghi %r1,64
- clgrjl %r1,%r4,.Lloop64
-
- vl %v16,0(%r5,%r3) /* Load s. */
- clgijl %r4,17,.Lremaining_v16 /* If n <= 16, process remaining
- bytes. */
-.Llt64:
- lgr %r7,%r4
- slgfi %r7,16 /* border_len = n - 16. */
-
- 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
-
-.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. */
- /* Zero in remaining bytes? -> jump away (zero-index <= max-index). */
- clrjle %r1,%r7,.Lfound_v16_store
- 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
-
-.Lfound_v16_32:
- aghi %r5,32
- j .Lfound_v16
-.Lfound_v18_48:
- aghi %r5,32
-.Lfound_v18_16:
- aghi %r5,16
-.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)
-
-.Lloop64:
- vl %v16,0(%r5,%r3)
- 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. */
- vfenezbs %v17,%v18,%v18
- je .Lfound_v18_16
- vl %v16,32(%r5,%r3)
- vst %v18,16(%r5,%r2)
- vfenezbs %v17,%v16,%v16
- je .Lfound_v16_32
- vl %v18,48(%r5,%r3)
- vst %v16,32(%r5,%r2)
- vfenezbs %v17,%v18,%v18
- je .Lfound_v18_48
- vst %v18,48(%r5,%r2)
-
- aghi %r5,64
- lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
- aghi %r1,64
- clgrjl %r1,%r4,.Lloop64
-
- vl %v16,0(%r5,%r3) /* Load s. */
- j .Llt64
-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
deleted file mode 100644
index f7f9d51..0000000
--- a/sysdeps/s390/multiarch/stpncpy.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Multiple versions of stpncpy.
- Copyright (C) 2015-2018 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
- . */
-
-#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
-# define stpncpy __redirect_stpncpy
-# define __stpncpy __redirect___stpncpy
-# include
-# undef stpncpy
-# undef __stpncpy
-# include
-
-s390_vx_libc_ifunc_redirected (__redirect___stpncpy, __stpncpy)
-weak_alias (__stpncpy, stpncpy)
-
-#else
-# include
-#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
diff --git a/sysdeps/s390/stpncpy-c.c b/sysdeps/s390/stpncpy-c.c
new file mode 100644
index 0000000..e5d1ae8
--- /dev/null
+++ b/sysdeps/s390/stpncpy-c.c
@@ -0,0 +1,33 @@
+/* Default stpncpy implementation for S/390.
+ Copyright (C) 2015-2018 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
+ . */
+
+#include
+
+#if HAVE_STPNCPY_C
+# if HAVE_STPNCPY_IFUNC
+# define STPNCPY STPNCPY_C
+
+# if defined SHARED && IS_IN (libc)
+# undef libc_hidden_def
+# define libc_hidden_def(name) \
+ __hidden_ver1 (__stpncpy_c, __GI___stpncpy, __stpncpy_c);
+# endif
+# endif
+
+# include
+#endif
diff --git a/sysdeps/s390/stpncpy-vx.S b/sysdeps/s390/stpncpy-vx.S
new file mode 100644
index 0000000..3dccc10
--- /dev/null
+++ b/sysdeps/s390/stpncpy-vx.S
@@ -0,0 +1,211 @@
+/* Vector optimized 32/64 bit S/390 version of stpncpy.
+ Copyright (C) 2015-2018 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
+ . */
+
+#include
+
+#if HAVE_STPNCPY_Z13
+
+# 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_Z13)
+ .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. */
+
+ vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */
+ lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */
+ llgfr %r6,%r6 /* Convert 32bit to 64bit. */
+
+ lghi %r5,0 /* current_len = 0. */
+
+ 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. */
+ clrjl %r1,%r6,.Lfound_v16_store /* Found zero within loaded bytes,
+ copy and return. */
+
+ /* Align s to 16 byte. */
+ risbgn %r7,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
+ lghi %r5,15 /* current_len = 15. */
+ slr %r5,%r7 /* Compute highest index to 16byte boundary. */
+
+ /* Zero not found and n > loaded-byte-count. */
+ vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */
+ ahi %r5,1 /* Start loop at next character. */
+
+ /* Now we are 16byte aligned, so we can load a full vreg
+ without page fault. */
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r4,.Lloop64
+
+ vl %v16,0(%r5,%r3) /* Load s. */
+ clgijl %r4,17,.Lremaining_v16 /* If n <= 16, process remaining
+ bytes. */
+.Llt64:
+ lgr %r7,%r4
+ slgfi %r7,16 /* border_len = n - 16. */
+
+ 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
+
+.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. */
+ /* Zero in remaining bytes? -> jump away (zero-index <= max-index). */
+ clrjle %r1,%r7,.Lfound_v16_store
+ 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
+
+.Lfound_v16_32:
+ aghi %r5,32
+ j .Lfound_v16
+.Lfound_v18_48:
+ aghi %r5,32
+.Lfound_v18_16:
+ aghi %r5,16
+.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)
+
+.Lloop64:
+ vl %v16,0(%r5,%r3)
+ 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. */
+ vfenezbs %v17,%v18,%v18
+ je .Lfound_v18_16
+ vl %v16,32(%r5,%r3)
+ vst %v18,16(%r5,%r2)
+ vfenezbs %v17,%v16,%v16
+ je .Lfound_v16_32
+ vl %v18,48(%r5,%r3)
+ vst %v16,32(%r5,%r2)
+ vfenezbs %v17,%v18,%v18
+ je .Lfound_v18_48
+ vst %v18,48(%r5,%r2)
+
+ aghi %r5,64
+ lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
+ aghi %r1,64
+ clgrjl %r1,%r4,.Lloop64
+
+ vl %v16,0(%r5,%r3) /* Load s. */
+ j .Llt64
+END(STPNCPY_Z13)
+
+# if ! HAVE_STPNCPY_IFUNC
+strong_alias (STPNCPY_Z13, __stpncpy)
+weak_alias (__stpncpy, stpncpy)
+# endif
+
+# if ! HAVE_STPNCPY_C && defined SHARED && IS_IN (libc)
+strong_alias (STPNCPY_Z13, __GI___stpncpy)
+# endif
+#endif
diff --git a/sysdeps/s390/stpncpy.c b/sysdeps/s390/stpncpy.c
new file mode 100644
index 0000000..250dc68
--- /dev/null
+++ b/sysdeps/s390/stpncpy.c
@@ -0,0 +1,43 @@
+/* Multiple versions of stpncpy.
+ Copyright (C) 2015-2018 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
+ . */
+
+#include
+
+#if HAVE_STPNCPY_IFUNC
+# define stpncpy __redirect_stpncpy
+# define __stpncpy __redirect___stpncpy
+# include
+# undef stpncpy
+# undef __stpncpy
+# include
+
+# if HAVE_STPNCPY_C
+extern __typeof (__redirect_stpncpy) STPNCPY_C attribute_hidden;
+# endif
+
+# if HAVE_STPNCPY_Z13
+extern __typeof (__redirect_stpncpy) STPNCPY_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect___stpncpy, __stpncpy,
+ (HAVE_STPNCPY_Z13 && (hwcap & HWCAP_S390_VX))
+ ? STPNCPY_Z13
+ : STPNCPY_DEFAULT
+ )
+weak_alias (__stpncpy, stpncpy)
+#endif