1#include<stdio.h> 2#include<assert.h> 3 4int main() 5{ 6 int rs, rt, dsp; 7 int ach = 5, acl = 5; 8 int resulth, resultl, resultdsp; 9 10 rs = 0xBC0123AD; 11 rt = 0x01643721; 12 resulth = 0x00BD3A22; 13 resultl = 0xD138776B; 14 resultdsp = 0x00; 15 __asm 16 ("mthi %0, $ac1\n\t" 17 "mtlo %1, $ac1\n\t" 18 "dpsq_sa.l.w $ac1, %3, %4\n\t" 19 "mfhi %0, $ac1\n\t" 20 "mflo %1, $ac1\n\t" 21 "rddsp %2\n\t" 22 : "+r"(ach), "+r"(acl), "=r"(dsp) 23 : "r"(rs), "r"(rt) 24 ); 25 dsp = (dsp >> 17) & 0x01; 26 assert(dsp == resultdsp); 27 assert(ach == resulth); 28 assert(acl == resultl); 29 30 ach = 0x54321123; 31 acl = 5; 32 rs = 0x80000000; 33 rt = 0x80000000; 34 35 resulth = 0xd4321123; 36 resultl = 0x06; 37 resultdsp = 0x01; 38 39 __asm 40 ("mthi %0, $ac1\n\t" 41 "mtlo %1, $ac1\n\t" 42 "dpsq_sa.l.w $ac1, %3, %4\n\t" 43 "mfhi %0, $ac1\n\t" 44 "mflo %1, $ac1\n\t" 45 "rddsp %2\n\t" 46 : "+r"(ach), "+r"(acl), "=r"(dsp) 47 : "r"(rs), "r"(rt) 48 ); 49 dsp = (dsp >> 17) & 0x01; 50 assert(dsp == resultdsp); 51 assert(ach == resulth); 52 assert(acl == resultl); 53 54 return 0; 55} 56