| 1 | #include<stdio.h> |
| 2 | #include<assert.h> |
| 3 | |
| 4 | int main() |
| 5 | { |
| 6 | int rt, ach, acl, dsp, pos, efi; |
| 7 | int result; |
| 8 | |
| 9 | ach = 0x05; |
| 10 | acl = 0xB4CB; |
| 11 | dsp = 0x07; |
| 12 | result = 0x000C; |
| 13 | |
| 14 | __asm |
| 15 | ("wrdsp %1, 0x01\n\t" |
| 16 | "mthi %2, $ac1\n\t" |
| 17 | "mtlo %3, $ac1\n\t" |
| 18 | "extpdp %0, $ac1, 0x03\n\t" |
| 19 | "rddsp %1\n\t" |
| 20 | : "=r"(rt), "+r"(dsp) |
| 21 | : "r"(ach), "r"(acl) |
| 22 | ); |
| 23 | pos = dsp & 0x3F; |
| 24 | efi = (dsp >> 14) & 0x01; |
| 25 | assert(pos == 3); |
| 26 | assert(efi == 0); |
| 27 | assert(result == rt); |
| 28 | |
| 29 | ach = 0x05; |
| 30 | acl = 0xB4CB; |
| 31 | dsp = 0x01; |
| 32 | |
| 33 | __asm |
| 34 | ("wrdsp %1, 0x01\n\t" |
| 35 | "mthi %2, $ac1\n\t" |
| 36 | "mtlo %3, $ac1\n\t" |
| 37 | "extpdp %0, $ac1, 0x03\n\t" |
| 38 | "rddsp %1\n\t" |
| 39 | : "=r"(rt), "+r"(dsp) |
| 40 | : "r"(ach), "r"(acl) |
| 41 | ); |
| 42 | efi = (dsp >> 14) & 0x01; |
| 43 | assert(efi == 1); |
| 44 | |
| 45 | |
| 46 | ach = 0; |
| 47 | acl = 0; |
| 48 | dsp = 0; |
| 49 | result = 0; |
| 50 | |
| 51 | __asm |
| 52 | ("wrdsp %1\n\t" |
| 53 | "mthi %2, $ac1\n\t" |
| 54 | "mtlo %3, $ac1\n\t" |
| 55 | "extpdp %0, $ac1, 0x00\n\t" |
| 56 | "rddsp %1\n\t" |
| 57 | : "=r"(rt), "+r"(dsp) |
| 58 | : "r"(ach), "r"(acl) |
| 59 | ); |
| 60 | assert(dsp == 0x3F); |
| 61 | assert(result == rt); |
| 62 | |
| 63 | return 0; |
| 64 | } |