diff options
Diffstat (limited to 'arch/sh/lib64/memcpy.c')
| -rw-r--r-- | arch/sh/lib64/memcpy.c | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/arch/sh/lib64/memcpy.c b/arch/sh/lib64/memcpy.c deleted file mode 100644 index fba436a92bfa..000000000000 --- a/arch/sh/lib64/memcpy.c +++ /dev/null | |||
| @@ -1,81 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (C) 2002 Mark Debbage (Mark.Debbage@superh.com) | ||
| 3 | * | ||
| 4 | * May be copied or modified under the terms of the GNU General Public | ||
| 5 | * License. See linux/COPYING for more information. | ||
| 6 | * | ||
| 7 | */ | ||
| 8 | |||
| 9 | #include <linux/types.h> | ||
| 10 | #include <asm/string.h> | ||
| 11 | |||
| 12 | // This is a simplistic optimization of memcpy to increase the | ||
| 13 | // granularity of access beyond one byte using aligned | ||
| 14 | // loads and stores. This is not an optimal implementation | ||
| 15 | // for SH-5 (especially with regard to prefetching and the cache), | ||
| 16 | // and a better version should be provided later ... | ||
| 17 | |||
| 18 | void *memcpy(void *dest, const void *src, size_t count) | ||
| 19 | { | ||
| 20 | char *d = (char *) dest, *s = (char *) src; | ||
| 21 | |||
| 22 | if (count >= 32) { | ||
| 23 | int i = 8 - (((unsigned long) d) & 0x7); | ||
| 24 | |||
| 25 | if (i != 8) | ||
| 26 | while (i-- && count--) { | ||
| 27 | *d++ = *s++; | ||
| 28 | } | ||
| 29 | |||
| 30 | if (((((unsigned long) d) & 0x7) == 0) && | ||
| 31 | ((((unsigned long) s) & 0x7) == 0)) { | ||
| 32 | while (count >= 32) { | ||
| 33 | unsigned long long t1, t2, t3, t4; | ||
| 34 | t1 = *(unsigned long long *) (s); | ||
| 35 | t2 = *(unsigned long long *) (s + 8); | ||
| 36 | t3 = *(unsigned long long *) (s + 16); | ||
| 37 | t4 = *(unsigned long long *) (s + 24); | ||
| 38 | *(unsigned long long *) (d) = t1; | ||
| 39 | *(unsigned long long *) (d + 8) = t2; | ||
| 40 | *(unsigned long long *) (d + 16) = t3; | ||
| 41 | *(unsigned long long *) (d + 24) = t4; | ||
| 42 | d += 32; | ||
| 43 | s += 32; | ||
| 44 | count -= 32; | ||
| 45 | } | ||
| 46 | while (count >= 8) { | ||
| 47 | *(unsigned long long *) d = | ||
| 48 | *(unsigned long long *) s; | ||
| 49 | d += 8; | ||
| 50 | s += 8; | ||
| 51 | count -= 8; | ||
| 52 | } | ||
| 53 | } | ||
| 54 | |||
| 55 | if (((((unsigned long) d) & 0x3) == 0) && | ||
| 56 | ((((unsigned long) s) & 0x3) == 0)) { | ||
| 57 | while (count >= 4) { | ||
| 58 | *(unsigned long *) d = *(unsigned long *) s; | ||
| 59 | d += 4; | ||
| 60 | s += 4; | ||
| 61 | count -= 4; | ||
| 62 | } | ||
| 63 | } | ||
| 64 | |||
| 65 | if (((((unsigned long) d) & 0x1) == 0) && | ||
| 66 | ((((unsigned long) s) & 0x1) == 0)) { | ||
| 67 | while (count >= 2) { | ||
| 68 | *(unsigned short *) d = *(unsigned short *) s; | ||
| 69 | d += 2; | ||
| 70 | s += 2; | ||
| 71 | count -= 2; | ||
| 72 | } | ||
| 73 | } | ||
| 74 | } | ||
| 75 | |||
| 76 | while (count--) { | ||
| 77 | *d++ = *s++; | ||
| 78 | } | ||
| 79 | |||
| 80 | return d; | ||
| 81 | } | ||
