| 1 | #include<stdio.h> |
| 2 | #include<assert.h> |
| 3 | |
| 4 | int main() |
| 5 | { |
| 6 | int rt, ach, acl, dsp; |
| 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 | "extp %0, $ac1, 0x03\n\t" |
| 19 | "rddsp %1\n\t" |
| 20 | : "=r"(rt), "+r"(dsp) |
| 21 | : "r"(ach), "r"(acl) |
| 22 | ); |
| 23 | dsp = (dsp >> 14) & 0x01; |
| 24 | assert(dsp == 0); |
| 25 | assert(result == rt); |
| 26 | |
| 27 | ach = 0x05; |
| 28 | acl = 0xB4CB; |
| 29 | dsp = 0x01; |
| 30 | |
| 31 | __asm |
| 32 | ("wrdsp %1, 0x01\n\t" |
| 33 | "mthi %2, $ac1\n\t" |
| 34 | "mtlo %3, $ac1\n\t" |
| 35 | "extp %0, $ac1, 0x03\n\t" |
| 36 | "rddsp %1\n\t" |
| 37 | : "=r"(rt), "+r"(dsp) |
| 38 | : "r"(ach), "r"(acl) |
| 39 | ); |
| 40 | dsp = (dsp >> 14) & 0x01; |
| 41 | assert(dsp == 1); |
| 42 | |
| 43 | ach = 0; |
| 44 | acl = 0x80000001; |
| 45 | dsp = 0x1F; |
| 46 | result = 0x80000001; |
| 47 | |
| 48 | __asm |
| 49 | ("wrdsp %1\n\t" |
| 50 | "mthi %2, $ac2\n\t" |
| 51 | "mtlo %3, $ac2\n\t" |
| 52 | "extp %0, $ac2, 0x1F\n\t" |
| 53 | "rddsp %1\n\t" |
| 54 | : "=r"(rt), "+r"(dsp) |
| 55 | : "r"(ach), "r"(acl) |
| 56 | ); |
| 57 | dsp = (dsp >> 14) & 0x01; |
| 58 | assert(dsp == 0); |
| 59 | assert(result == rt); |
| 60 | |
| 61 | return 0; |
| 62 | } |