File 0004-S390-Refactor-memcpy-mempcpy-ifunc-handling.patch of Package glibc.14505
From 34f9407938c46ba4d05d3de5302ef2b101c6cf2f Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Tue, 18 Dec 2018 13:57:06 +0100
Subject: [PATCH 04/18] S390: Refactor memcpy/mempcpy ifunc handling.
This patch moves all ifunc variants for memcpy/mempcpy
to sysdeps/s390/memcpy-z900.S. The configure-check/preprocessor logic
in sysdeps/s390/ifunc-memcpy.h decides if ifunc is needed at all
and which ifunc variants should be available.
E.g. if the compiler/assembler already supports z196 by default,
the older ifunc variants are not included.
If we only need the newest ifunc variant,
then we can skip ifunc at all.
Therefore the ifunc-resolvers and __libc_ifunc_impl_list are adjusted
in order to handle only the available ifunc variants.
ChangeLog:
* sysdeps/s390/ifunc-memcpy.h: New File.
* sysdeps/s390/memcpy.S: Move to ...
* sysdeps/s390/memcpy-z900.S ... here.
Move implementations from memcpy-s390x.s to here.
* sysdeps/s390/multiarch/memcpy-s390x.S: Delete File.
* sysdeps/s390/multiarch/Makefile (sysdep_routines):
Remove memcpy/mempcpy variants.
* sysdeps/s390/Makefile (sysdep_routines):
Add memcpy/mempcpy variants.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Adjust ifunc variants for
memcpy and mempcpy.
* sysdeps/s390/multiarch/memcpy.c: Move ifunc resolver
to ...
* sysdeps/s390/memcpy.c: ... here.
Adjust ifunc variants for memcpy.
* sysdeps/s390/multiarch/mempcpy.c: Move to ...
* sysdeps/s390/mempcpy.c: ... here.
Adjust ifunc variants for mempcpy.
* sysdeps/s390/mempcpy.S: Delete file.
(cherry picked from commit 18eb862d454a41012ccdd5127715ef7cd2a711ec)
---
sysdeps/s390/Makefile | 4 +
sysdeps/s390/ifunc-memcpy.h | 68 ++++++++++++++
sysdeps/s390/{memcpy.S => memcpy-z900.S} | 148 +++++++++++++++++++++++++------
sysdeps/s390/{multiarch => }/memcpy.c | 28 +++++-
sysdeps/s390/mempcpy.S | 19 ----
sysdeps/s390/{multiarch => }/mempcpy.c | 26 +++++-
sysdeps/s390/multiarch/Makefile | 3 +-
sysdeps/s390/multiarch/ifunc-impl-list.c | 33 ++++---
sysdeps/s390/multiarch/memcpy-s390x.S | 132 ---------------------------
9 files changed, 267 insertions(+), 194 deletions(-)
create mode 100644 sysdeps/s390/ifunc-memcpy.h
rename sysdeps/s390/{memcpy.S => memcpy-z900.S} (50%)
rename sysdeps/s390/{multiarch => }/memcpy.c (60%)
delete mode 100644 sysdeps/s390/mempcpy.S
rename sysdeps/s390/{multiarch => }/mempcpy.c (63%)
delete mode 100644 sysdeps/s390/multiarch/memcpy-s390x.S
Index: glibc-2.26/sysdeps/s390/Makefile
===================================================================
--- glibc-2.26.orig/sysdeps/s390/Makefile
+++ glibc-2.26/sysdeps/s390/Makefile
@@ -29,3 +29,7 @@ $(inst_gconvdir)/%.so: $(objpfx)%.so $(+
sysdeps-gconv-modules = ../sysdeps/s390/gconv-modules
endif
+
+ifeq ($(subdir),string)
+sysdep_routines += mempcpy memcpy memcpy-z900
+endif
Index: glibc-2.26/sysdeps/s390/ifunc-memcpy.h
===================================================================
--- /dev/null
+++ glibc-2.26/sysdeps/s390/ifunc-memcpy.h
@@ -0,0 +1,68 @@
+/* memcpy 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
+ <http://www.gnu.org/licenses/>. */
+
+#if defined SHARED && defined USE_MULTIARCH && IS_IN (libc) \
+ && ! defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
+# define HAVE_MEMCPY_IFUNC 1
+#else
+# define HAVE_MEMCPY_IFUNC 0
+#endif
+
+#if defined HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
+# define MEMCPY_DEFAULT MEMCPY_Z196
+# define MEMPCPY_DEFAULT MEMPCPY_Z196
+# define HAVE_MEMCPY_Z900_G5 0
+# define HAVE_MEMCPY_Z10 0
+# define HAVE_MEMCPY_Z196 1
+#elif defined HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT
+# define MEMCPY_DEFAULT MEMCPY_Z10
+# define MEMPCPY_DEFAULT MEMPCPY_Z10
+# define HAVE_MEMCPY_Z900_G5 0
+# define HAVE_MEMCPY_Z10 1
+# define HAVE_MEMCPY_Z196 HAVE_MEMCPY_IFUNC
+#else
+# define MEMCPY_DEFAULT MEMCPY_Z900_G5
+# define MEMPCPY_DEFAULT MEMPCPY_Z900_G5
+# define HAVE_MEMCPY_Z900_G5 1
+# define HAVE_MEMCPY_Z10 HAVE_MEMCPY_IFUNC
+# define HAVE_MEMCPY_Z196 HAVE_MEMCPY_IFUNC
+#endif
+
+#if HAVE_MEMCPY_Z900_G5
+# define MEMCPY_Z900_G5 __memcpy_default
+# define MEMPCPY_Z900_G5 __mempcpy_default
+#else
+# define MEMCPY_Z900_G5 NULL
+# define MEMPCPY_Z900_G5 NULL
+#endif
+
+#if HAVE_MEMCPY_Z10
+# define MEMCPY_Z10 __memcpy_z10
+# define MEMPCPY_Z10 __mempcpy_z10
+#else
+# define MEMCPY_Z10 NULL
+# define MEMPCPY_Z10 NULL
+#endif
+
+#if HAVE_MEMCPY_Z196
+# define MEMCPY_Z196 __memcpy_z196
+# define MEMPCPY_Z196 __mempcpy_z196
+#else
+# define MEMCPY_Z196 NULL
+# define MEMPCPY_Z196 NULL
+#endif
Index: glibc-2.26/sysdeps/s390/memcpy-z900.S
===================================================================
--- /dev/null
+++ glibc-2.26/sysdeps/s390/memcpy-z900.S
@@ -0,0 +1,224 @@
+/* memcpy - copy a block from source to destination. 31/64 bit S/390 version.
+ Copyright (C) 2012-2017 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/>. */
+
+
+#include <sysdep.h>
+#include "asm-syntax.h"
+#include <ifunc-memcpy.h>
+
+/* INPUT PARAMETERS
+ %r2 = address of destination memory area
+ %r3 = address of source memory area
+ %r4 = number of bytes to copy. */
+
+ .text
+
+#if defined __s390x__
+# define LTGR ltgr
+# define CGHI cghi
+# define LGR lgr
+# define AGHI aghi
+# define BRCTG brctg
+#else
+# define LTGR ltr
+# define CGHI chi
+# define LGR lr
+# define AGHI ahi
+# define BRCTG brct
+#endif /* ! defined __s390x__ */
+
+#if HAVE_MEMCPY_Z900_G5
+ENTRY(MEMPCPY_Z900_G5)
+# if defined __s390x__
+ .machine "z900"
+# else
+ .machine "g5"
+# endif /* ! defined __s390x__ */
+ LGR %r1,%r2 # Use as dest
+ la %r2,0(%r4,%r2) # Return dest + n
+ j .L_Z900_G5_start
+END(MEMPCPY_Z900_G5)
+
+ENTRY(MEMCPY_Z900_G5)
+# if defined __s390x__
+ .machine "z900"
+# else
+ .machine "g5"
+# endif /* ! defined __s390x__ */
+ LGR %r1,%r2 # r1: Use as dest ; r2: Return dest
+.L_Z900_G5_start:
+ LTGR %r4,%r4
+ je .L_Z900_G5_4
+ AGHI %r4,-1
+# if defined __s390x__
+ srlg %r5,%r4,8
+# else
+ lr %r5,%r4
+ srl %r5,8
+# endif /* ! defined __s390x__ */
+ LTGR %r5,%r5
+ jne .L_Z900_G5_13
+.L_Z900_G5_3:
+# if defined __s390x__
+ larl %r5,.L_Z900_G5_15
+# define Z900_G5_EX_D 0
+# else
+ basr %r5,0
+.L_Z900_G5_14:
+# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_14
+# endif /* ! defined __s390x__ */
+ ex %r4,Z900_G5_EX_D(%r5)
+.L_Z900_G5_4:
+ br %r14
+.L_Z900_G5_13:
+ CGHI %r5,4096 # Switch to mvcle for copies >1MB
+ jh __memcpy_mvcle
+.L_Z900_G5_12:
+ mvc 0(256,%r1),0(%r3)
+ la %r1,256(%r1)
+ la %r3,256(%r3)
+ BRCTG %r5,.L_Z900_G5_12
+ j .L_Z900_G5_3
+.L_Z900_G5_15:
+ mvc 0(1,%r1),0(%r3)
+END(MEMCPY_Z900_G5)
+#endif /* HAVE_MEMCPY_Z900_G5 */
+
+ENTRY(__memcpy_mvcle)
+ # Using as standalone function will result in unexpected
+ # results since the length field is incremented by 1 in order to
+ # compensate the changes already done in the functions above.
+ LGR %r0,%r2 # backup return dest [ + n ]
+ AGHI %r4,1 # length + 1
+ LGR %r5,%r4 # source length
+ LGR %r4,%r3 # source address
+ LGR %r2,%r1 # destination address
+ LGR %r3,%r5 # destination length = source length
+.L_MVCLE_1:
+ mvcle %r2,%r4,0 # thats it, MVCLE is your friend
+ jo .L_MVCLE_1
+ LGR %r2,%r0 # return destination address
+ br %r14
+END(__memcpy_mvcle)
+
+#undef LTGR
+#undef CGHI
+#undef LGR
+#undef AGHI
+#undef BRCTG
+
+#if HAVE_MEMCPY_Z10
+ENTRY(MEMPCPY_Z10)
+ .machine "z10"
+ .machinemode "zarch_nohighgprs"
+ lgr %r1,%r2 # Use as dest
+ la %r2,0(%r4,%r2) # Return dest + n
+ j .L_Z10_start
+END(MEMPCPY_Z10)
+
+ENTRY(MEMCPY_Z10)
+ .machine "z10"
+ .machinemode "zarch_nohighgprs"
+ lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
+.L_Z10_start:
+# if !defined __s390x__
+ llgfr %r4,%r4
+# endif /* !defined __s390x__ */
+ cgije %r4,0,.L_Z10_4
+ aghi %r4,-1
+ srlg %r5,%r4,8
+ cgijlh %r5,0,.L_Z10_13
+.L_Z10_3:
+ exrl %r4,.L_Z10_15
+.L_Z10_4:
+ br %r14
+.L_Z10_13:
+ cgfi %r5,65535 # Switch to mvcle for copies >16MB
+ jh __memcpy_mvcle
+.L_Z10_12:
+ pfd 1,768(%r3)
+ pfd 2,768(%r1)
+ mvc 0(256,%r1),0(%r3)
+ la %r1,256(%r1)
+ la %r3,256(%r3)
+ brctg %r5,.L_Z10_12
+ j .L_Z10_3
+.L_Z10_15:
+ mvc 0(1,%r1),0(%r3)
+END(MEMCPY_Z10)
+#endif /* HAVE_MEMCPY_Z10 */
+
+#if HAVE_MEMCPY_Z196
+ENTRY(MEMPCPY_Z196)
+ .machine "z196"
+ .machinemode "zarch_nohighgprs"
+ lgr %r1,%r2 # Use as dest
+ la %r2,0(%r4,%r2) # Return dest + n
+ j .L_Z196_start
+END(MEMPCPY_Z196)
+
+ENTRY(MEMCPY_Z196)
+ .machine "z196"
+ .machinemode "zarch_nohighgprs"
+ lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
+.L_Z196_start:
+# if !defined __s390x__
+ llgfr %r4,%r4
+# endif /* !defined __s390x__ */
+ ltgr %r4,%r4
+ je .L_Z196_4
+ aghi %r4,-1
+ srlg %r5,%r4,8
+ ltgr %r5,%r5
+ jne .L_Z196_5
+.L_Z196_3:
+ exrl %r4,.L_Z196_14
+.L_Z196_4:
+ br %r14
+.L_Z196_5:
+ cgfi %r5,262144 # Switch to mvcle for copies >64MB
+ jh __memcpy_mvcle
+.L_Z196_2:
+ pfd 1,768(%r3)
+ pfd 2,768(%r1)
+ mvc 0(256,%r1),0(%r3)
+ aghi %r5,-1
+ la %r1,256(%r1)
+ la %r3,256(%r3)
+ jne .L_Z196_2
+ j .L_Z196_3
+.L_Z196_14:
+ mvc 0(1,%r1),0(%r3)
+END(MEMCPY_Z196)
+#endif /* HAVE_MEMCPY_Z196 */
+
+#if ! HAVE_MEMCPY_IFUNC
+/* If we don't use ifunc, define an alias for mem[p]cpy here.
+ Otherwise see sysdeps/s390/mem[p]cpy.c. */
+strong_alias (MEMCPY_DEFAULT, memcpy)
+strong_alias (MEMPCPY_DEFAULT, __mempcpy)
+weak_alias (__mempcpy, mempcpy)
+#endif
+
+#if defined SHARED && IS_IN (libc)
+/* Defines the internal symbols.
+ Compare to libc_hidden_[builtin_]def (mem[p]cpy) in string/mem[p]cpy.c. */
+strong_alias (MEMCPY_DEFAULT, __GI_memcpy)
+strong_alias (MEMPCPY_DEFAULT, __GI_mempcpy)
+strong_alias (MEMPCPY_DEFAULT, __GI___mempcpy)
+#endif
Index: glibc-2.26/sysdeps/s390/memcpy.S
===================================================================
--- glibc-2.26.orig/sysdeps/s390/memcpy.S
+++ /dev/null
@@ -1,128 +0,0 @@
-/* memcpy - copy a block from source to destination. 31/64 bit S/390 version.
- Copyright (C) 2012-2017 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/>. */
-
-
-#include <sysdep.h>
-#include "asm-syntax.h"
-
-/* INPUT PARAMETERS
- %r2 = address of destination memory area
- %r3 = address of source memory area
- %r4 = number of bytes to copy. */
-
- .text
-
-#if defined __s390x__
-# define LTGR ltgr
-# define CGHI cghi
-# define LGR lgr
-# define AGHI aghi
-# define BRCTG brctg
-#else
-# define LTGR ltr
-# define CGHI chi
-# define LGR lr
-# define AGHI ahi
-# define BRCTG brct
-#endif /* ! defined __s390x__ */
-
-ENTRY(__mempcpy)
-#if defined __s390x__
- .machine "z900"
-#else
- .machine "g5"
-#endif /* ! defined __s390x__ */
- LGR %r1,%r2 # Use as dest
- la %r2,0(%r4,%r2) # Return dest + n
- j .L_Z900_G5_start
-END(__mempcpy)
-#ifndef USE_MULTIARCH
-libc_hidden_def (__mempcpy)
-weak_alias (__mempcpy, mempcpy)
-libc_hidden_builtin_def (mempcpy)
-#endif
-
-ENTRY(memcpy)
-#if defined __s390x__
- .machine "z900"
-#else
- .machine "g5"
-#endif /* ! defined __s390x__ */
- LGR %r1,%r2 # r1: Use as dest ; r2: Return dest
-.L_Z900_G5_start:
- LTGR %r4,%r4
- je .L_Z900_G5_4
- AGHI %r4,-1
-#if defined __s390x__
- srlg %r5,%r4,8
-#else
- lr %r5,%r4
- srl %r5,8
-#endif /* ! defined __s390x__ */
- LTGR %r5,%r5
- jne .L_Z900_G5_13
-.L_Z900_G5_3:
-#if defined __s390x__
- larl %r5,.L_Z900_G5_15
-# define Z900_G5_EX_D 0
-#else
- basr %r5,0
-.L_Z900_G5_14:
-# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_14
-#endif /* ! defined __s390x__ */
- ex %r4,Z900_G5_EX_D(%r5)
-.L_Z900_G5_4:
- br %r14
-.L_Z900_G5_13:
- CGHI %r5,4096 # Switch to mvcle for copies >1MB
- jh __memcpy_mvcle
-.L_Z900_G5_12:
- mvc 0(256,%r1),0(%r3)
- la %r1,256(%r1)
- la %r3,256(%r3)
- BRCTG %r5,.L_Z900_G5_12
- j .L_Z900_G5_3
-.L_Z900_G5_15:
- mvc 0(1,%r1),0(%r3)
-END(memcpy)
-#ifndef USE_MULTIARCH
-libc_hidden_builtin_def (memcpy)
-#endif
-
-ENTRY(__memcpy_mvcle)
- # Using as standalone function will result in unexpected
- # results since the length field is incremented by 1 in order to
- # compensate the changes already done in the functions above.
- LGR %r0,%r2 # backup return dest [ + n ]
- AGHI %r4,1 # length + 1
- LGR %r5,%r4 # source length
- LGR %r4,%r3 # source address
- LGR %r2,%r1 # destination address
- LGR %r3,%r5 # destination length = source length
-.L_MVCLE_1:
- mvcle %r2,%r4,0 # thats it, MVCLE is your friend
- jo .L_MVCLE_1
- LGR %r2,%r0 # return destination address
- br %r14
-END(__memcpy_mvcle)
-
-#undef LTGR
-#undef CGHI
-#undef LGR
-#undef AGHI
-#undef BRCTG
Index: glibc-2.26/sysdeps/s390/memcpy.c
===================================================================
--- /dev/null
+++ glibc-2.26/sysdeps/s390/memcpy.c
@@ -0,0 +1,49 @@
+/* Multiple versions of memcpy.
+ Copyright (C) 2015-2017 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/>. */
+
+#include <ifunc-memcpy.h>
+
+#if HAVE_MEMCPY_IFUNC
+# define memcpy __redirect_memcpy
+# include <string.h>
+# undef memcpy
+# include <ifunc-resolve.h>
+
+# if HAVE_MEMCPY_Z900_G5
+extern __typeof (__redirect_memcpy) MEMCPY_Z900_G5 attribute_hidden;
+# endif
+
+# if HAVE_MEMCPY_Z10
+extern __typeof (__redirect_memcpy) MEMCPY_Z10 attribute_hidden;
+# endif
+
+# if HAVE_MEMCPY_Z196
+extern __typeof (__redirect_memcpy) MEMCPY_Z196 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect_memcpy, memcpy,
+ ({
+ s390_libc_ifunc_init ();
+ (HAVE_MEMCPY_Z196 && S390_IS_Z196 (stfle_bits))
+ ? MEMCPY_Z196
+ : (HAVE_MEMCPY_Z10 && S390_IS_Z10 (stfle_bits))
+ ? MEMCPY_Z10
+ : MEMCPY_DEFAULT;
+ })
+ )
+#endif
Index: glibc-2.26/sysdeps/s390/mempcpy.S
===================================================================
--- glibc-2.26.orig/sysdeps/s390/mempcpy.S
+++ /dev/null
@@ -1,19 +0,0 @@
-/* CPU specific mempcpy without multiarch - 32/64 bit S/390 version.
- Copyright (C) 2016-2017 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/>. */
-
-/* mempcpy is implemented in memcpy.S. */
Index: glibc-2.26/sysdeps/s390/mempcpy.c
===================================================================
--- /dev/null
+++ glibc-2.26/sysdeps/s390/mempcpy.c
@@ -0,0 +1,54 @@
+/* Multiple versions of mempcpy.
+ Copyright (C) 2016-2017 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/>. */
+
+#include <ifunc-memcpy.h>
+
+#if HAVE_MEMCPY_IFUNC
+# define mempcpy __redirect_mempcpy
+# define __mempcpy __redirect___mempcpy
+# define __NO_STRING_INLINES
+# define NO_MEMPCPY_STPCPY_REDIRECT
+# include <string.h>
+# undef mempcpy
+# undef __mempcpy
+# include <ifunc-resolve.h>
+
+# if HAVE_MEMCPY_Z900_G5
+extern __typeof (__redirect___mempcpy) MEMPCPY_Z900_G5 attribute_hidden;
+# endif
+
+# if HAVE_MEMCPY_Z10
+extern __typeof (__redirect___mempcpy) MEMPCPY_Z10 attribute_hidden;
+# endif
+
+# if HAVE_MEMCPY_Z196
+extern __typeof (__redirect___mempcpy) MEMPCPY_Z196 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__redirect___mempcpy, __mempcpy,
+ ({
+ s390_libc_ifunc_init ();
+ (HAVE_MEMCPY_Z196 && S390_IS_Z196 (stfle_bits))
+ ? MEMPCPY_Z196
+ : (HAVE_MEMCPY_Z10 && S390_IS_Z10 (stfle_bits))
+ ? MEMPCPY_Z10
+ : MEMPCPY_DEFAULT;
+ })
+ )
+weak_alias (__mempcpy, mempcpy);
+#endif
Index: glibc-2.26/sysdeps/s390/multiarch/Makefile
===================================================================
--- glibc-2.26.orig/sysdeps/s390/multiarch/Makefile
+++ glibc-2.26/sysdeps/s390/multiarch/Makefile
@@ -18,8 +18,7 @@ sysdep_routines += strlen strlen-vx strl
memchr memchr-vx \
rawmemchr rawmemchr-vx rawmemchr-c \
memccpy memccpy-vx memccpy-c \
- memrchr memrchr-vx memrchr-c \
- mempcpy memcpy memcpy-s390x
+ memrchr memrchr-vx memrchr-c
endif
ifeq ($(subdir),wcsmbs)
Index: glibc-2.26/sysdeps/s390/multiarch/ifunc-impl-list.c
===================================================================
--- glibc-2.26.orig/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ glibc-2.26/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -21,6 +21,7 @@
#include <wchar.h>
#include <ifunc-impl-list.h>
#include <ifunc-resolve.h>
+#include <ifunc-memcpy.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
@@ -60,23 +61,35 @@ __libc_ifunc_impl_list (const char *name
S390_IS_Z10 (stfle_bits), __memcmp_z10)
IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_default))
-#ifdef SHARED
-
+#if HAVE_MEMCPY_IFUNC
IFUNC_IMPL (i, name, memcpy,
+# if HAVE_MEMCPY_Z196
IFUNC_IMPL_ADD (array, i, memcpy,
- S390_IS_Z196 (stfle_bits), __memcpy_z196)
+ S390_IS_Z196 (stfle_bits), MEMCPY_Z196)
+# endif
+# if HAVE_MEMCPY_Z10
IFUNC_IMPL_ADD (array, i, memcpy,
- S390_IS_Z10 (stfle_bits), __memcpy_z10)
- IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_default))
+ S390_IS_Z10 (stfle_bits), MEMCPY_Z10)
+# endif
+# if HAVE_MEMCPY_Z900_G5
+ IFUNC_IMPL_ADD (array, i, memcpy, 1, MEMCPY_Z900_G5)
+# endif
+ )
IFUNC_IMPL (i, name, mempcpy,
+# if HAVE_MEMCPY_Z196
IFUNC_IMPL_ADD (array, i, mempcpy,
- S390_IS_Z196 (stfle_bits), ____mempcpy_z196)
+ S390_IS_Z196 (stfle_bits), MEMPCPY_Z196)
+# endif
+# if HAVE_MEMCPY_Z10
IFUNC_IMPL_ADD (array, i, mempcpy,
- S390_IS_Z10 (stfle_bits), ____mempcpy_z10)
- IFUNC_IMPL_ADD (array, i, mempcpy, 1, ____mempcpy_default))
-
-#endif /* SHARED */
+ S390_IS_Z10 (stfle_bits), MEMPCPY_Z10)
+# endif
+# if HAVE_MEMCPY_Z900_G5
+ IFUNC_IMPL_ADD (array, i, mempcpy, 1, MEMPCPY_Z900_G5)
+# endif
+ )
+#endif /* HAVE_MEMCPY_IFUNC */
#ifdef HAVE_S390_VX_ASM_SUPPORT
Index: glibc-2.26/sysdeps/s390/multiarch/memcpy-s390x.S
===================================================================
--- glibc-2.26.orig/sysdeps/s390/multiarch/memcpy-s390x.S
+++ /dev/null
@@ -1,132 +0,0 @@
-/* CPU specific memcpy implementations. 31/64 bit S/390 version.
- Copyright (C) 2012-2017 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/>. */
-
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
-/* INPUT PARAMETERS
- %r2 = target operands address
- %r3 = source operands address
- %r4 = number of bytes to copy. */
-
- .text
-
-#if defined SHARED && IS_IN (libc)
-
-ENTRY(____mempcpy_z196)
- .machine "z196"
- .machinemode "zarch_nohighgprs"
- lgr %r1,%r2 # Use as dest
- la %r2,0(%r4,%r2) # Return dest + n
- j .L_Z196_start
-END(____mempcpy_z196)
-
-ENTRY(__memcpy_z196)
- .machine "z196"
- .machinemode "zarch_nohighgprs"
- lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
-.L_Z196_start:
-# if !defined __s390x__
- llgfr %r4,%r4
-# endif /* !defined __s390x__ */
- ltgr %r4,%r4
- je .L_Z196_4
- aghi %r4,-1
- srlg %r5,%r4,8
- ltgr %r5,%r5
- jne .L_Z196_5
-.L_Z196_3:
- exrl %r4,.L_Z196_14
-.L_Z196_4:
- br %r14
-.L_Z196_5:
- cgfi %r5,262144 # Switch to mvcle for copies >64MB
- jh __memcpy_mvcle
-.L_Z196_2:
- pfd 1,768(%r3)
- pfd 2,768(%r1)
- mvc 0(256,%r1),0(%r3)
- aghi %r5,-1
- la %r1,256(%r1)
- la %r3,256(%r3)
- jne .L_Z196_2
- j .L_Z196_3
-.L_Z196_14:
- mvc 0(1,%r1),0(%r3)
-END(__memcpy_z196)
-
-ENTRY(____mempcpy_z10)
- .machine "z10"
- .machinemode "zarch_nohighgprs"
- lgr %r1,%r2 # Use as dest
- la %r2,0(%r4,%r2) # Return dest + n
- j .L_Z10_start
-END(____mempcpy_z10)
-
-ENTRY(__memcpy_z10)
- .machine "z10"
- .machinemode "zarch_nohighgprs"
- lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
-.L_Z10_start:
-# if !defined __s390x__
- llgfr %r4,%r4
-# endif /* !defined __s390x__ */
- cgije %r4,0,.L_Z10_4
- aghi %r4,-1
- srlg %r5,%r4,8
- cgijlh %r5,0,.L_Z10_13
-.L_Z10_3:
- exrl %r4,.L_Z10_15
-.L_Z10_4:
- br %r14
-.L_Z10_13:
- cgfi %r5,65535 # Switch to mvcle for copies >16MB
- jh __memcpy_mvcle
-.L_Z10_12:
- pfd 1,768(%r3)
- pfd 2,768(%r1)
- mvc 0(256,%r1),0(%r3)
- la %r1,256(%r1)
- la %r3,256(%r3)
- brctg %r5,.L_Z10_12
- j .L_Z10_3
-.L_Z10_15:
- mvc 0(1,%r1),0(%r3)
-END(__memcpy_z10)
-
-# define __mempcpy ____mempcpy_default
-#endif /* SHARED && IS_IN (libc) */
-
-#define memcpy __memcpy_default
-#include "../memcpy.S"
-#undef memcpy
-
-#if defined SHARED && IS_IN (libc)
-.globl __GI_memcpy
-.set __GI_memcpy,__memcpy_default
-.globl __GI_mempcpy
-.set __GI_mempcpy,____mempcpy_default
-.globl __GI___mempcpy
-.set __GI___mempcpy,____mempcpy_default
-#else
-.globl memcpy
-.set memcpy,__memcpy_default
-.weak mempcpy
-.set mempcpy,__mempcpy
-#endif
Index: glibc-2.26/sysdeps/s390/multiarch/memcpy.c
===================================================================
--- glibc-2.26.orig/sysdeps/s390/multiarch/memcpy.c
+++ /dev/null
@@ -1,27 +0,0 @@
-/* Multiple versions of memcpy.
- Copyright (C) 2015-2017 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/>. */
-
-/* In the static lib memcpy is needed before the reloc is resolved. */
-#if defined SHARED && IS_IN (libc)
-# define memcpy __redirect_memcpy
-# include <string.h>
-# undef memcpy
-# include <ifunc-resolve.h>
-
-s390_libc_ifunc (__redirect_memcpy, __memcpy, memcpy)
-#endif
Index: glibc-2.26/sysdeps/s390/multiarch/mempcpy.c
===================================================================
--- glibc-2.26.orig/sysdeps/s390/multiarch/mempcpy.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Multiple versions of mempcpy.
- Copyright (C) 2016-2017 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 SHARED && IS_IN (libc)
-# define mempcpy __redirect_mempcpy
-# define __mempcpy __redirect___mempcpy
-# define __NO_STRING_INLINES
-# define NO_MEMPCPY_STPCPY_REDIRECT
-# include <string.h>
-# undef mempcpy
-# undef __mempcpy
-# include <ifunc-resolve.h>
-
-s390_libc_ifunc (__redirect___mempcpy, ____mempcpy, __mempcpy)
-weak_alias (__mempcpy, mempcpy);
-#endif
