102 lines
1.2 KiB
C
102 lines
1.2 KiB
C
|
#if defined __thumb__
|
||
|
|
|
||
|
|
#include "../../string/memcpy.c"
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
#include "xscale.h"
|
||
|
|
|
||
|
|
void *
|
||
|
|
memcpy (void *dst0, const void *src0, size_t len)
|
||
|
|
{
|
||
|
|
int dummy;
|
||
|
|
asm volatile (
|
||
|
|
#ifndef __OPTIMIZE_SIZE__
|
||
|
|
"cmp %2, #0x3
|
||
|
|
bls 3f
|
||
|
|
and lr, %1, #0x3
|
||
|
|
and r3, %0, #0x3
|
||
|
|
cmp lr, r3
|
||
|
|
bne 3f
|
||
|
|
cmp lr, #0x0
|
||
|
|
beq 2f
|
||
|
|
b 1f
|
||
|
|
0:
|
||
|
|
ldrb r3, [%1], #1
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
tst %1, #0x3
|
||
|
|
strb r3, [%0], #1
|
||
|
|
beq 3f
|
||
|
|
1:
|
||
|
|
sub %2, %2, #1
|
||
|
|
cmn %2, #1
|
||
|
|
bne 0b
|
||
|
|
2:
|
||
|
|
cmp %2, #0xf
|
||
|
|
bls 1f
|
||
|
|
0:
|
||
|
|
ldmia %1!, { r3, r4, r5, lr }
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
|
||
|
|
sub %2, %2, #16
|
||
|
|
cmp %2, #0xf
|
||
|
|
stmia %0!, { r3, r4, r5, lr }
|
||
|
|
bhi 0b
|
||
|
|
1:
|
||
|
|
cmp %2, #0x7
|
||
|
|
bls 1f
|
||
|
|
0:
|
||
|
|
ldmia %1!, { r3, r4 }
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
|
||
|
|
sub %2, %2, #8
|
||
|
|
cmp %2, #0x7
|
||
|
|
stmia %0!, { r3, r4 }
|
||
|
|
bhi 0b
|
||
|
|
1:
|
||
|
|
cmp %2, #0x3
|
||
|
|
bls 3f
|
||
|
|
0:
|
||
|
|
sub %2, %2, #4
|
||
|
|
ldr r3, [%1], #4
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
|
||
|
|
cmp %2, #0x3
|
||
|
|
str r3, [%0], #4
|
||
|
|
bhi 0b
|
||
|
|
"
|
||
|
|
#endif /* !__OPTIMIZE_SIZE__ */
|
||
|
|
"
|
||
|
|
3:
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
sub %2, %2, #1
|
||
|
|
cmn %2, #1
|
||
|
|
beq 1f
|
||
|
|
0:
|
||
|
|
sub %2, %2, #1
|
||
|
|
ldrb r3, [%1], #1
|
||
|
|
"
|
||
|
|
PRELOADSTR ("%1")
|
||
|
|
"
|
||
|
|
cmn %2, #1
|
||
|
|
strb r3, [%0], #1
|
||
|
|
bne 0b
|
||
|
|
1:"
|
||
|
|
: "=&r" (dummy), "=&r" (src0), "=&r" (len)
|
||
|
|
: "0" (dst0), "1" (src0), "2" (len)
|
||
|
|
: "memory", "lr", "r3", "r4", "r5", "cc");
|
||
|
|
return dst0;
|
||
|
|
}
|
||
|
|
#endif
|