@@ -54,5 +54,5 @@ endif
endif
ifeq ($(subdir),string)
-sysdep_routines += memset memset-z900
+sysdep_routines += bzero memset memset-z900
endif
similarity index 52%
rename from sysdeps/s390/s390-32/bzero.S
rename to sysdeps/s390/bzero.c
@@ -1,7 +1,6 @@
-/* bzero -- set a block of memory to zero. IBM S390 version
+/* Multiple versions of bzero.
+ Copyright (C) 2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Copyright (C) 2000-2018 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -17,26 +16,32 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-/*
- * R2 = address to memory area
- * R3 = number of bytes to fill
- */
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
- .text
-ENTRY(__bzero)
- ltr %r3,%r3
- jz .L1
- sr %r1,%r1 # set pad byte to zero
- sr %r4,%r4 # no source for MVCLE, only a pad byte
- sr %r5,%r5
-.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
- jo .L0
-.L1: br %r14
-END(__bzero)
-
-#ifndef NO_WEAK_ALIAS
+#include <ifunc-memset.h>
+#if HAVE_MEMSET_IFUNC
+# include <string.h>
+# include <ifunc-resolve.h>
+
+# if HAVE_MEMSET_Z900_G5
+extern __typeof (__bzero) BZERO_Z900_G5 attribute_hidden;
+# endif
+
+# if HAVE_MEMSET_Z10
+extern __typeof (__bzero) BZERO_Z10 attribute_hidden;
+# endif
+
+# if HAVE_MEMSET_Z196
+extern __typeof (__bzero) BZERO_Z196 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__bzero, __bzero,
+ ({
+ s390_libc_ifunc_init ();
+ (HAVE_MEMSET_Z196 && S390_IS_Z196 (stfle_bits))
+ ? BZERO_Z196
+ : (HAVE_MEMSET_Z10 && S390_IS_Z10 (stfle_bits))
+ ? BZERO_Z10
+ : BZERO_DEFAULT;
+ })
+ )
weak_alias (__bzero, bzero)
#endif
@@ -25,16 +25,19 @@
#if defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
# define MEMSET_DEFAULT MEMSET_Z196
+# define BZERO_DEFAULT BZERO_Z196
# define HAVE_MEMSET_Z900_G5 0
# define HAVE_MEMSET_Z10 0
# define HAVE_MEMSET_Z196 1
#elif defined HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT
# define MEMSET_DEFAULT MEMSET_Z10
+# define BZERO_DEFAULT BZERO_Z10
# define HAVE_MEMSET_Z900_G5 0
# define HAVE_MEMSET_Z10 1
# define HAVE_MEMSET_Z196 HAVE_MEMSET_IFUNC
#else
# define MEMSET_DEFAULT MEMSET_Z900_G5
+# define BZERO_DEFAULT BZERO_Z900_G5
# define HAVE_MEMSET_Z900_G5 1
# define HAVE_MEMSET_Z10 HAVE_MEMSET_IFUNC
# define HAVE_MEMSET_Z196 HAVE_MEMSET_IFUNC
@@ -48,18 +51,24 @@
#if HAVE_MEMSET_Z900_G5
# define MEMSET_Z900_G5 __memset_default
+# define BZERO_Z900_G5 __bzero_default
#else
# define MEMSET_Z900_G5 NULL
+# define BZERO_Z900_G5 NULL
#endif
#if HAVE_MEMSET_Z10
# define MEMSET_Z10 __memset_z10
+# define BZERO_Z10 __bzero_z10
#else
# define MEMSET_Z10 NULL
+# define BZERO_Z10 NULL
#endif
#if HAVE_MEMSET_Z196
# define MEMSET_Z196 __memset_z196
+# define BZERO_Z196 __bzero_z196
#else
# define MEMSET_Z196 NULL
+# define BZERO_Z196 NULL
#endif
@@ -22,10 +22,14 @@
#include "asm-syntax.h"
#include <ifunc-memset.h>
-/* INPUT PARAMETERS
+/* INPUT PARAMETERS - MEMSET
%r2 = address of memory area
%r3 = byte to fill memory with
- %r4 = number of bytes to fill. */
+ %r4 = number of bytes to fill.
+
+ INPUT PARAMETERS - BZERO
+ %r2 = address of memory area
+ %r3 = number of bytes to fill. */
.text
@@ -44,7 +48,14 @@
# define BRCTG brct
# endif /* ! defined __s390x__ */
+ENTRY(BZERO_Z900_G5)
+ LGR %r4,%r3
+ xr %r3,%r3
+ j .L_Z900_G5_start
+END(BZERO_Z900_G5)
+
ENTRY(MEMSET_Z900_G5)
+.L_Z900_G5_start:
#if defined __s390x__
.machine "z900"
#else
@@ -90,7 +101,16 @@ END(MEMSET_Z900_G5)
#endif /* HAVE_MEMSET_Z900_G5 */
#if HAVE_MEMSET_Z10
+ENTRY(BZERO_Z10)
+ .machine "z10"
+ .machinemode "zarch_nohighgprs"
+ lgr %r4,%r3
+ xr %r3,%r3
+ j .L_Z10_start
+END(BZERO_Z10)
+
ENTRY(MEMSET_Z10)
+.L_Z10_start:
.machine "z10"
.machinemode "zarch_nohighgprs"
# if !defined __s390x__
@@ -122,7 +142,16 @@ END(MEMSET_Z10)
#endif /* HAVE_MEMSET_Z10 */
#if HAVE_MEMSET_Z196
+ENTRY(BZERO_Z196)
+ .machine "z196"
+ .machinemode "zarch_nohighgprs"
+ lgr %r4,%r3
+ xr %r3,%r3
+ j .L_Z196_start
+END(BZERO_Z196)
+
ENTRY(MEMSET_Z196)
+.L_Z196_start:
.machine "z196"
.machinemode "zarch_nohighgprs"
# if !defined __s390x__
@@ -177,6 +206,10 @@ END(__memset_mvcle)
/* If we don't use ifunc, define an alias for memset here.
Otherwise see sysdeps/s390/memset.c. */
strong_alias (MEMSET_DEFAULT, memset)
+/* Same for bzero. If ifunc is used, see
+ sysdeps/s390/bzero.c. */
+strong_alias (BZERO_DEFAULT, __bzero)
+weak_alias (__bzero, bzero)
#endif
#if defined SHARED && IS_IN (libc)
@@ -59,6 +59,21 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
# endif
# if HAVE_MEMSET_Z900_G5
IFUNC_IMPL_ADD (array, i, memset, 1, MEMSET_Z900_G5)
+# endif
+ )
+
+ /* Note: bzero is implemented in memset. */
+ IFUNC_IMPL (i, name, bzero,
+# if HAVE_MEMSET_Z196
+ IFUNC_IMPL_ADD (array, i, bzero,
+ S390_IS_Z196 (stfle_bits), BZERO_Z196)
+# endif
+# if HAVE_MEMSET_Z10
+ IFUNC_IMPL_ADD (array, i, bzero,
+ S390_IS_Z10 (stfle_bits), BZERO_Z10)
+# endif
+# if HAVE_MEMSET_Z900_G5
+ IFUNC_IMPL_ADD (array, i, bzero, 1, BZERO_Z900_G5)
# endif
)
#endif /* HAVE_MEMSET_IFUNC */
deleted file mode 100644
@@ -1,41 +0,0 @@
-/* bzero -- set a block of memory to zero. 64 bit S/390 version.
- This file is part of the GNU C Library.
- Copyright (C) 2001-2018 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
-
- 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/>. */
-
-/* INPUT PARAMETERS
- %r2 = address of memory area
- %r3 = number of bytes to fill. */
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
- .text
-ENTRY(__bzero)
- ltgr %r3,%r3
- jz .L1
- sgr %r1,%r1 # set pad byte to zero
- sgr %r4,%r4 # no source for MVCLE, only a pad byte
- sgr %r5,%r5
-.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
- jo .L0
-.L1: br %r14
-END(__bzero)
-
-#ifndef NO_WEAK_ALIAS
-weak_alias (__bzero, bzero)
-#endif
This patch removes the bzero s390 implementation with mvcle and adds entry points for bzero in memset ifunc variants. Therefore an ifunc resolver is implemented for bzero, too. ChangeLog: * sysdeps/s390/s390-32/bzero.S: Delete file. * sysdeps/s390/s390-64/bzero.S: Likewise. * sysdeps/s390/Makefile (sysdep_routines): Add bzero. * sysdeps/s390/bzero.c: New file. * sysdeps/s390/memset-z900.S: Add bzero entry points. * sysdeps/s390/ifunc-memset.h: Add bzero function macros. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add bzero ifunc variants. --- sysdeps/s390/Makefile | 2 +- sysdeps/s390/{s390-32/bzero.S => bzero.c} | 53 +++++++++++++---------- sysdeps/s390/ifunc-memset.h | 9 ++++ sysdeps/s390/memset-z900.S | 37 +++++++++++++++- sysdeps/s390/multiarch/ifunc-impl-list.c | 15 +++++++ sysdeps/s390/s390-64/bzero.S | 41 ------------------ 6 files changed, 89 insertions(+), 68 deletions(-) rename sysdeps/s390/{s390-32/bzero.S => bzero.c} (52%) delete mode 100644 sysdeps/s390/s390-64/bzero.S