#include"io.h" int main(void) { long long rd, rs, rt, dsp; long long result, resultdsp; rs = 0x80001234; rt = 0x80004321; result = 0xFFFFFFFF80005555; __asm ("mulq_s.w %0, %1, %2\n\t" : "=r"(rd) : "r"(rs), "r"(rt) ); if (rd != result) { printf("mulq_s.w error\n"); return -1; } rs = 0x80000000; rt = 0x80000000; result = 0x7FFFFFFF; resultdsp = 1; __asm ("mulq_s.w %0, %2, %3\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rs), "r"(rt) ); dsp = (dsp >> 21) & 0x01; if (rd != result || dsp != resultdsp) { printf("mulq_s.w error\n"); return -1; } return 0; }