[PATCH] Make mkcompile_h use LANG=C and LC_ALL=C for $CC -v
[linux-2.6.git] / arch / powerpc / lib / mem_64.S
1 /*
2  * String handling functions for PowerPC.
3  *
4  * Copyright (C) 1996 Paul Mackerras.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  */
11 #include <asm/processor.h>
12 #include <asm/errno.h>
13 #include <asm/ppc_asm.h>
14
15 _GLOBAL(memset)
16         neg     r0,r3
17         rlwimi  r4,r4,8,16,23
18         andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
19         rlwimi  r4,r4,16,0,15
20         cmplw   cr1,r5,r0               /* do we get that far? */
21         rldimi  r4,r4,32,0
22         mtcrf   1,r0
23         mr      r6,r3
24         blt     cr1,8f
25         beq+    3f                      /* if already 8-byte aligned */
26         subf    r5,r0,r5
27         bf      31,1f
28         stb     r4,0(r6)
29         addi    r6,r6,1
30 1:      bf      30,2f
31         sth     r4,0(r6)
32         addi    r6,r6,2
33 2:      bf      29,3f
34         stw     r4,0(r6)
35         addi    r6,r6,4
36 3:      srdi.   r0,r5,6
37         clrldi  r5,r5,58
38         mtctr   r0
39         beq     5f
40 4:      std     r4,0(r6)
41         std     r4,8(r6)
42         std     r4,16(r6)
43         std     r4,24(r6)
44         std     r4,32(r6)
45         std     r4,40(r6)
46         std     r4,48(r6)
47         std     r4,56(r6)
48         addi    r6,r6,64
49         bdnz    4b
50 5:      srwi.   r0,r5,3
51         clrlwi  r5,r5,29
52         mtcrf   1,r0
53         beq     8f
54         bf      29,6f
55         std     r4,0(r6)
56         std     r4,8(r6)
57         std     r4,16(r6)
58         std     r4,24(r6)
59         addi    r6,r6,32
60 6:      bf      30,7f
61         std     r4,0(r6)
62         std     r4,8(r6)
63         addi    r6,r6,16
64 7:      bf      31,8f
65         std     r4,0(r6)
66         addi    r6,r6,8
67 8:      cmpwi   r5,0
68         mtcrf   1,r5
69         beqlr+
70         bf      29,9f
71         stw     r4,0(r6)
72         addi    r6,r6,4
73 9:      bf      30,10f
74         sth     r4,0(r6)
75         addi    r6,r6,2
76 10:     bflr    31
77         stb     r4,0(r6)
78         blr
79
80 _GLOBAL(memmove)
81         cmplw   0,r3,r4
82         bgt     .backwards_memcpy
83         b       .memcpy
84
85 _GLOBAL(backwards_memcpy)
86         rlwinm. r7,r5,32-3,3,31         /* r0 = r5 >> 3 */
87         add     r6,r3,r5
88         add     r4,r4,r5
89         beq     2f
90         andi.   r0,r6,3
91         mtctr   r7
92         bne     5f
93 1:      lwz     r7,-4(r4)
94         lwzu    r8,-8(r4)
95         stw     r7,-4(r6)
96         stwu    r8,-8(r6)
97         bdnz    1b
98         andi.   r5,r5,7
99 2:      cmplwi  0,r5,4
100         blt     3f
101         lwzu    r0,-4(r4)
102         subi    r5,r5,4
103         stwu    r0,-4(r6)
104 3:      cmpwi   0,r5,0
105         beqlr
106         mtctr   r5
107 4:      lbzu    r0,-1(r4)
108         stbu    r0,-1(r6)
109         bdnz    4b
110         blr
111 5:      mtctr   r0
112 6:      lbzu    r7,-1(r4)
113         stbu    r7,-1(r6)
114         bdnz    6b
115         subf    r5,r0,r5
116         rlwinm. r7,r5,32-3,3,31
117         beq     2b
118         mtctr   r7
119         b       1b