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08f43f9b | 1 | /* Set a block of memory to some byte value. 64 bit S/390 version. |
b168057a | 2 | Copyright (C) 2012-2015 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 | ||
4f41c682 | 30 | #if IS_IN (libc) |
08f43f9b AK |
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 | ||
4f41c682 | 106 | #if !IS_IN (libc) |
08f43f9b AK |
107 | .globl memset |
108 | .set memset,memset_z900 | |
109 | #endif |