unaligned_load_store.c revision 436e89c602e787e7a27dd6624b09beed41a0da8a 
1#include <stdio.h>
2unsigned int mem[] = {
3   0xaabbccdd, 0x11223344, 0x01823194, 0x01823a08,
4   0x00000000, 0x77ff528c, 0x77deb460, 0x00000001
5};
6
7void printMem(char* s)
8{
9   int i;
10   printf("%s\n", s);
11   for (i=0; i<7 ; i=i+1)
12      printf("mem[%d]: 0x%x\n", i, mem[i]);
13}
14
15int main ()
16{
17   printMem("PRE lwl");
18   __asm__ volatile("move $a0, %0"       "\n\t"
19                    "lw   $t0, 0($a0)"   "\n\t"
20                    "lwl  $t0, 4($a0)"   "\n\t"
21                    "sw   $t0, 8($a0)"   "\n\t"
22                    "lw   $t1, 0($a0)"   "\n\t"
23                    "lwl  $t1, 5($a0)"   "\n\t"
24                    "sw   $t1, 12($a0)"  "\n\t"
25                    "lw   $t2, 0($a0)"   "\n\t"
26                    "lwl  $t2, 6($a0)"   "\n\t"
27                    "sw   $t2, 16($a0)"  "\n\t"
28                    "lw   $t3, 0($a0)"   "\n\t"
29                    "lwl  $t3, 7($a0)"   "\n\t"
30                    "sw   $t3, 20($a0)"  "\n\t"
31                    :
32                    : "r" (mem)
33                    : "a0", "t0", "t1", "t2", "t3", "cc", "memory"
34                   );
35   printMem("POST lwl");
36
37   mem[0] = 0xaabbccdd;
38   mem[1] = 0x11223344;
39   mem[2] = 0x01823194;
40   mem[3] = 0x01823a08;
41   mem[4] = 0x00000000;
42   mem[5] = 0x77ff528c;
43   mem[6] = 0x77deb460;
44   mem[7] = 0x00000001;
45
46   printMem("PRE lwr");
47   __asm__ volatile("move $a0, %0"       "\n\t"
48                    "lw   $t0, 0($a0)"   "\n\t"
49                    "lwr  $t0, 4($a0)"   "\n\t"
50                    "sw   $t0, 8($a0)"   "\n\t"
51                    "lw   $t1, 0($a0)"   "\n\t"
52                    "lwr  $t1, 5($a0)"   "\n\t"
53                    "sw   $t1, 12($a0)"  "\n\t"
54                    "lw   $t2, 0($a0)"   "\n\t"
55                    "lwr  $t2, 6($a0)"   "\n\t"
56                    "sw   $t2, 16($a0)"  "\n\t"
57                    "lw   $t3, 0($a0)"   "\n\t"
58                    "lwr  $t3, 7($a0)"   "\n\t"
59                    "sw   $t3, 20($a0)"  "\n\t"
60                    :
61                    : "r" (mem)
62                    : "a0", "t0", "t1", "t2", "t3", "cc", "memory"
63                   );
64   printMem("POST lwr");
65
66   return 0;
67}
68