projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 847b055c | 1 | /* Set a block of memory to some byte value. For IBM S390 |
| 85dd1003 | 2 | Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. |
| 41bdb6e2 | 3 | This file is part of the GNU C Library. |
| 847b055c AJ |
4 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 847b055c AJ |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| 847b055c | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 847b055c AJ |
19 | |
| 20 | /* | |
| 21 | * R2 = address to memory area | |
| 22 | * R3 = byte to fill memory with | |
| 23 | * R4 = number of bytes to fill | |
| 24 | */ | |
| 25 | ||
| 26 | #include "sysdep.h" | |
| 27 | #include "asm-syntax.h" | |
| 28 | ||
| 29 | .text | |
| 30 | ENTRY(memset) | |
| 31 | ltr %r4,%r4 | |
| 32 | jz .L1 | |
| 33 | lr %r0,%r2 # save source address | |
| 34 | lr %r1,%r3 # move pad byte to R1 | |
| 35 | lr %r3,%r4 | |
| 36 | sr %r4,%r4 # no source for MVCLE, only a pad byte | |
| 37 | sr %r5,%r5 | |
| 38 | .L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend | |
| 39 | jo .L0 | |
| 40 | lr %r2,%r0 # return value is source address | |
| 41 | .L1: | |
| 42 | br %r14 | |
| 43 | END(memset) | |
| 85dd1003 | 44 | libc_hidden_builtin_def (memset) |