projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 08f43f9b | 1 | /* Set a block of memory to some byte value. 64 bit S/390 version. |
| d4697bc9 | 2 | Copyright (C) 2012-2014 Free Software Foundation, Inc. |
| 08f43f9b AK |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 18 | ||
| 19 | ||
| 20 | #include "sysdep.h" | |
| 21 | #include "asm-syntax.h" | |
| 22 | ||
| 23 | /* INPUT PARAMETERS | |
| 24 | %r2 = address of memory area | |
| 25 | %r3 = byte to fill memory with | |
| 26 | %r4 = number of bytes to fill. */ | |
| 27 | ||
| 28 | .text | |
| 29 | ||
| 30 | #ifndef NOT_IN_libc | |
| 31 | ||
| 32 | ENTRY(memset_z196) | |
| 33 | .machine "z196" | |
| 34 | ltgr %r4,%r4 | |
| 35 | je .L_Z196_4 | |
| 36 | stc %r3,0(%r2) | |
| 37 | lgr %r1,%r2 | |
| 38 | cghi %r4,1 | |
| 39 | je .L_Z196_4 | |
| 40 | aghi %r4,-2 | |
| 41 | srlg %r5,%r4,8 | |
| 42 | ltgr %r5,%r5 | |
| 43 | jne .L_Z196_1 | |
| 44 | .L_Z196_3: | |
| 45 | exrl %r4,.L_Z196_17 | |
| 46 | .L_Z196_4: | |
| 47 | br %r14 | |
| 48 | .L_Z196_1: | |
| 49 | cgfi %r5,1048576 | |
| 50 | jh memset_mvcle # Switch to mvcle for >256MB | |
| 51 | .L_Z196_2: | |
| 52 | pfd 2,1024(%r1) | |
| 53 | mvc 1(256,%r1),0(%r1) | |
| 54 | aghi %r5,-1 | |
| 55 | la %r1,256(%r1) | |
| 56 | jne .L_Z196_2 | |
| 57 | j .L_Z196_3 | |
| 58 | .L_Z196_17: | |
| 59 | mvc 1(1,%r1),0(%r1) | |
| 60 | END(memset_z196) | |
| 61 | ||
| 62 | ENTRY(memset_z10) | |
| 63 | .machine "z10" | |
| 64 | cgije %r4,0,.L_Z10_4 | |
| 65 | stc %r3,0(%r2) | |
| 66 | lgr %r1,%r2 | |
| 67 | cgije %r4,1,.L_Z10_4 | |
| 68 | aghi %r4,-2 | |
| 69 | srlg %r5,%r4,8 | |
| 70 | cgijlh %r5,0,.L_Z10_15 | |
| 71 | .L_Z10_3: | |
| 72 | exrl %r4,.L_Z10_18 | |
| 73 | .L_Z10_4: | |
| 74 | br %r14 | |
| 75 | .L_Z10_15: | |
| 76 | cgfi %r5,163840 # Switch to mvcle for >40MB | |
| 77 | jh memset_mvcle | |
| 78 | .L_Z10_14: | |
| 79 | pfd 2,1024(%r1) | |
| 80 | mvc 1(256,%r1),0(%r1) | |
| 81 | la %r1,256(%r1) | |
| 82 | brctg %r5,.L_Z10_14 | |
| 83 | j .L_Z10_3 | |
| 84 | .L_Z10_18: | |
| 85 | mvc 1(1,%r1),0(%r1) | |
| 86 | END(memset_z10) | |
| 87 | ||
| 88 | ENTRY(memset_mvcle) | |
| 89 | aghi %r4,2 # take back the change done by the caller | |
| 90 | lgr %r0,%r2 # save source address | |
| 91 | lgr %r1,%r3 # move pad byte to R1 | |
| 92 | lgr %r3,%r4 # move length to r3 | |
| 93 | sgr %r4,%r4 # no source for MVCLE, only a pad byte | |
| 94 | sgr %r5,%r5 | |
| 95 | .L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend | |
| 96 | jo .L0 | |
| 97 | lgr %r2,%r0 # return value is source address | |
| 98 | .L1: | |
| 99 | br %r14 | |
| 100 | END(memset_mvcle) | |
| 101 | ||
| 102 | #endif | |
| 103 | ||
| 104 | #include "../memset.S" | |
| 105 | ||
| 106 | #ifdef NOT_IN_libc | |
| 107 | .globl memset | |
| 108 | .set memset,memset_z900 | |
| 109 | #endif |