1 #include<stdio.h> 2 #include<assert.h> 3 4 int main() 5 { 6 int rs, rt, dsp; 7 int ach = 5, acl = 5; 8 int resulth, resultl, resultdsp; 9 10 rs = 0x800000FF; 11 rt = 0x00018000; 12 resulth = 0x05; 13 resultl = 0x80000202; 14 resultdsp = 0x01; 15 __asm 16 ("mthi %0, $ac1\n\t" 17 "mtlo %1, $ac1\n\t" 18 "dpaqx_s.w.ph $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 = 5; 31 acl = 5; 32 rs = 0x00FF00FF; 33 rt = 0x00010002; 34 resulth = 0x05; 35 resultl = 0x05FF; 36 /*********************************************************** 37 * Because of we set outflag at last time, although this 38 * time we set nothing, but it is stay the last time value. 39 **********************************************************/ 40 resultdsp = 0x01; 41 __asm 42 ("mthi %0, $ac1\n\t" 43 "mtlo %1, $ac1\n\t" 44 "dpaqx_s.w.ph $ac1, %3, %4\n\t" 45 "mfhi %0, $ac1\n\t" 46 "mflo %1, $ac1\n\t" 47 "rddsp %2\n\t" 48 : "+r"(ach), "+r"(acl), "=r"(dsp) 49 : "r"(rs), "r"(rt) 50 ); 51 dsp = (dsp >> 17) & 0x01; 52 assert(dsp == resultdsp); 53 assert(ach == resulth); 54 assert(acl == resultl); 55 56 ach = 5; 57 acl = 5; 58 rs = 0x800000FF; 59 rt = 0x00028000; 60 resulth = 0x05; 61 resultl = 0x80000400; 62 resultdsp = 0x01; 63 __asm 64 ("mthi %0, $ac1\n\t" 65 "mtlo %1, $ac1\n\t" 66 "dpaqx_s.w.ph $ac1, %3, %4\n\t" 67 "mfhi %0, $ac1\n\t" 68 "mflo %1, $ac1\n\t" 69 "rddsp %2\n\t" 70 : "+r"(ach), "+r"(acl), "=r"(dsp) 71 : "r"(rs), "r"(rt) 72 ); 73 dsp = (dsp >> 17) & 0x01; 74 assert(dsp == resultdsp); 75 assert(ach == resulth); 76 assert(acl == resultl); 77 78 return 0; 79 } 80