| 1 | #include<stdio.h> |
| 2 | #include<assert.h> |
| 3 | |
| 4 | int main() |
| 5 | { |
| 6 | int rt, rs, ach, acl, dsp, pos, efi; |
| 7 | int result; |
| 8 | |
| 9 | ach = 0x05; |
| 10 | acl = 0xB4CB; |
| 11 | dsp = 0x07; |
| 12 | rs = 0x03; |
| 13 | result = 0x000C; |
| 14 | |
| 15 | __asm |
| 16 | ("wrdsp %1, 0x01\n\t" |
| 17 | "mthi %2, $ac1\n\t" |
| 18 | "mtlo %3, $ac1\n\t" |
| 19 | "extpdpv %0, $ac1, %4\n\t" |
| 20 | "rddsp %1\n\t" |
| 21 | : "=r"(rt), "+r"(dsp) |
| 22 | : "r"(ach), "r"(acl), "r"(rs) |
| 23 | ); |
| 24 | pos = dsp & 0x3F; |
| 25 | efi = (dsp >> 14) & 0x01; |
| 26 | assert(pos == 3); |
| 27 | assert(efi == 0); |
| 28 | assert(result == rt); |
| 29 | |
| 30 | ach = 0x05; |
| 31 | acl = 0xB4CB; |
| 32 | dsp = 0x01; |
| 33 | |
| 34 | __asm |
| 35 | ("wrdsp %1, 0x01\n\t" |
| 36 | "mthi %2, $ac1\n\t" |
| 37 | "mtlo %3, $ac1\n\t" |
| 38 | "extpdpv %0, $ac1, %4\n\t" |
| 39 | "rddsp %1\n\t" |
| 40 | : "=r"(rt), "+r"(dsp) |
| 41 | : "r"(ach), "r"(acl), "r"(rs) |
| 42 | ); |
| 43 | efi = (dsp >> 14) & 0x01; |
| 44 | assert(efi == 1); |
| 45 | |
| 46 | return 0; |
| 47 | } |