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author | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:04 +0100 |
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committer | Stefan Liebler <stli@linux.ibm.com> | 2018-12-18 13:57:04 +0100 |
commit | 5f1743d118047ff1fbefe713f2397090e0418deb (patch) | |
tree | 905e78a084656c0c7d82f9e16a2e91bff57f516d /sysdeps/s390/s390-64/memset.S | |
parent | e8023f2685c9f97e72bbe9d2a9c968e0d8438371 (diff) | |
download | glibc-5f1743d118047ff1fbefe713f2397090e0418deb.zip glibc-5f1743d118047ff1fbefe713f2397090e0418deb.tar.gz glibc-5f1743d118047ff1fbefe713f2397090e0418deb.tar.bz2 |
S390: Unify 31/64bit memset.
The implementation of memset for s390-32 (31bit) and
s390-64 (64bit) is nearly the same.
This patch unifies it for maintability reasons.
__memset_z10 and __memset_z196 differs between 31 and 64bit:
-31bit needs .machinemode "zarch_nohighgprs" and llgfr %r4,%r4
-lr vs lgr and some other instructions:
But lgr and co can be also used on 31bit as this ifunc variant
is only called if we are on a zarch machine.
__memset_default differs between 31 and 64bit:
-Some 31bit vs 64bit instructions (e.g. ltr vs ltgr.
Solved with 31/64 specific instruction macros).
-The address of mvc instruction is setup in different ways
(larl vs bras). Solved with #if defined __s390x__.
Otherwise 31/64bit implementation has the same structure of the code.
ChangeLog:
* sysdeps/s390/s390-64/memset.S: Move to ...
* sysdeps/s390/memset.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/memset.S: Delete File.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memset.
* sysdeps/s390/s390-32/multiarch/Makefile (sysdep_routines):
Remove memset.
* sysdeps/s390/s390-64/multiarch/Makefile: Likewise.
* sysdeps/s390/s390-64/multiarch/memset-s390x.S: Move to ...
* sysdeps/s390/multiarch/memset-s390x.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/multiarch/memset-s390.S: Delete File.
* sysdeps/s390/s390-64/multiarch/memset.c: Move to ...
* sysdeps/s390/multiarch/memset.c: ... here.
* sysdeps/s390/s390-32/multiarch/memset.c: Delete File.
Diffstat (limited to 'sysdeps/s390/s390-64/memset.S')
-rw-r--r-- | sysdeps/s390/s390-64/memset.S | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/sysdeps/s390/s390-64/memset.S b/sysdeps/s390/s390-64/memset.S deleted file mode 100644 index 8799c65..0000000 --- a/sysdeps/s390/s390-64/memset.S +++ /dev/null @@ -1,64 +0,0 @@ -/* Set a block of memory to some byte value. 64 bit S/390 version. - Copyright (C) 2001-2018 Free Software Foundation, Inc. - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). - 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 memory area - %r3 = byte to fill memory with - %r4 = number of bytes to fill. */ - - .text - -#ifdef USE_MULTIARCH -ENTRY(__memset_default) -#else -ENTRY(memset) -#endif - .machine "z900" - ltgr %r4,%r4 - je .L_Z900_4 - stc %r3,0(%r2) - cghi %r4,1 - lgr %r1,%r2 - je .L_Z900_4 - aghi %r4,-2 - srlg %r3,%r4,8 - ltgr %r3,%r3 - jne .L_Z900_14 -.L_Z900_3: - larl %r3,.L_Z900_18 - ex %r4,0(%r3) -.L_Z900_4: - br %r14 -.L_Z900_14: - mvc 1(256,%r1),0(%r1) - la %r1,256(%r1) - brctg %r3,.L_Z900_14 - j .L_Z900_3 -.L_Z900_18: - mvc 1(1,%r1),0(%r1) -#ifdef USE_MULTIARCH -END(__memset_default) -#else -END(memset) -libc_hidden_builtin_def (memset) -#endif |