| /* Set a block of memory to some byte value. 64 bit S/390 version. |
| Copyright (C) 2001-2014 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_z900) |
| #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_z900) |
| #else |
| END(memset) |
| libc_hidden_builtin_def (memset) |
| #endif |
