OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [xscale/] [memmove.c] - Blame information for rev 816

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 207 jeremybenn 
#if defined __thumb__
2 
 
3 
#include "../../string/memmove.c"
4 
 
5 
#else
6 
 
7 
#include <string.h>
8 
#include "xscale.h"
9 
 
10 
static inline void *
11 
do_memcpy (void *dst0, const void *src0, size_t len)
12 
{
13 
  int dummy;
14 
  asm volatile (
15 
#ifndef __OPTIMIZE_SIZE__
16 
       "cmp     %2, #0x3\n\
17 
        bls     3f\n\
18 
        and     lr, %1, #0x3\n\
19 
        and     r3, %0, #0x3\n\
20 
        cmp     lr, r3\n\
21 
        bne     3f\n\
22 
        cmp     lr, #0x0\n\
23 
        beq     2f\n\
24 
        b       1f\n\
25 
0:\n\
26 
        ldrb    r3, [%1], #1\n\
27 
"
28 
        PRELOADSTR ("%1")
29 
"\n\
30 
        tst     %1, #0x3\n\
31 
        strb    r3, [%0], #1\n\
32 
        beq     3f\n\
33 
1:\n\
34 
        sub     %2, %2, #1\n\
35 
        cmn     %2, #1\n\
36 
        bne     0b\n\
37 
2:\n\
38 
        cmp     %2, #0xf\n\
39 
        bls     1f\n\
40 
0:\n\
41 
        ldmia   %1!, { r3, r4, r5, lr }\n\
42 
"
43 
        PRELOADSTR ("%1")
44 
"\n\
45 
\n\
46 
        sub     %2, %2, #16\n\
47 
        cmp     %2, #0xf\n\
48 
        stmia   %0!, { r3, r4, r5, lr }\n\
49 
        bhi     0b\n\
50 
1:\n\
51 
        cmp     %2, #0x7\n\
52 
        bls     1f\n\
53 
0:\n\
54 
        ldmia   %1!, { r3, r4 }\n\
55 
"
56 
        PRELOADSTR ("%1")
57 
"\n\
58 
\n\
59 
        sub     %2, %2, #8\n\
60 
        cmp     %2, #0x7\n\
61 
        stmia   %0!, { r3, r4 }\n\
62 
        bhi     0b\n\
63 
1:\n\
64 
        cmp     %2, #0x3\n\
65 
        bls     3f\n\
66 
0:\n\
67 
        sub     %2, %2, #4\n\
68 
        ldr     r3, [%1], #4\n\
69 
"
70 
        PRELOADSTR ("%1")
71 
"\n\
72 
\n\
73 
        cmp     %2, #0x3\n\
74 
        str     r3, [%0], #4\n\
75 
        bhi     0b\n\
76 
"
77 
#endif /* !__OPTIMIZE_SIZE__ */
78 
"\n\
79 
3:\n\
80 
"
81 
        PRELOADSTR ("%1")
82 
"\n\
83 
        sub     %2, %2, #1\n\
84 
        cmn     %2, #1\n\
85 
        beq     1f\n\
86 
0:\n\
87 
        sub     %2, %2, #1\n\
88 
        ldrb    r3, [%1], #1\n\
89 
"
90 
        PRELOADSTR ("%1")
91 
"\n\
92 
        cmn     %2, #1\n\
93 
        strb    r3, [%0], #1\n\
94 
        bne     0b\n\
95 
1:"
96 
       : "=&r" (dummy), "=&r" (src0), "=&r" (len)
97 
       : "0" (dst0), "1" (src0), "2" (len)
98 
       : "memory", "lr", "r3", "r4", "r5", "cc");
99 
  return dst0;
100 
}
101 
 
102 
void *
103 
memmove (void *dst, const void *src, size_t len)
104 
{
105 
  char *d = dst;
106 
  const char *s = src;
107 
 
108 
  if (s < d && d < s + len)
109 
    {
110 
      /* Destructive overlap...have to copy backwards.  */
111 
      s += len;
112 
      d += len;
113 
 
114 
      while (len--)
115 
        *--d = *--s;
116 
 
117 
      return dst;
118 
    }
119 
  else
120 
    return do_memcpy (dst, src, len);
121 
}
122 
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.