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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [machine/] [xscale/] [memset.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1010	ivang	`#if defined __thumb__`
2
3			`#include "../../string/memset.c"`
4
5			`#else`
6
7			`#include <string.h>`
8			`#include "xscale.h"`
9
10			`void *`
11			`memset (void *dst, int c, size_t len)`
12			`{`
13			`int dummy;`
14			`asm volatile ("tst %0, #0x3"`
15			`#ifndef __OPTIMIZE_SIZE__`
16			`"`
17			`beq 1f`
18			`b 2f`
19			`0:`
20			`strb %1, [%0], #1`
21			`tst %0, #0x3`
22			`beq 1f`
23			`2:`
24			`movs r3, %2`
25			`sub %2, %2, #1`
26			`bne 0b`
27			`1:`
28			`cmp %2, #0x3`
29			`bls 2f`
30			`and %1, %1, #0xff`
31			`orr lr, %1, %1, asl #8`
32			`cmp %2, #0xf`
33			`orr lr, lr, lr, asl #16`
34			`bls 1f`
35			`mov r3, lr`
36			`mov r4, lr`
37			`mov r5, lr`
38			`0:`
39			`sub %2, %2, #16`
40			`stmia %0!, { r3, r4, r5, lr }`
41			`cmp %2, #0xf`
42			`bhi 0b`
43			`1:`
44			`cmp %2, #0x7`
45			`bls 1f`
46			`mov r3, lr`
47			`0:`
48			`sub %2, %2, #8`
49			`stmia %0!, { r3, lr }`
50			`cmp %2, #0x7`
51			`bhi 0b`
52			`1:`
53			`cmp %2, #0x3`
54			`bls 2f`
55			`0:`
56			`sub %2, %2, #4`
57			`str lr, [%0], #4`
58			`cmp %2, #0x3`
59			`bhi 0b`
60			`"`
61			`#endif /* !__OPTIMIZE_SIZE__ */`
62			`"`
63			`2:`
64			`movs r3, %2`
65			`sub %2, %2, #1`
66			`beq 1f`
67			`0:`
68			`movs r3, %2`
69			`sub %2, %2, #1`
70			`strb %1, [%0], #1`
71			`bne 0b`
72			`1:"`
73
74			`: "=&r" (dummy), "=&r" (c), "=&r" (len)`
75			`: "0" (dst), "1" (c), "2" (len)`
76			`: "memory", "r3", "r4", "r5", "lr");`
77			`return dst;`
78			`}`
79
80			`#endif`