#include<stdio.h> #include<assert.h> int main() { int rd, rs, rt, dsp; int result, resultdsp; rs = 0x80001234; rt = 0x80004321; result = 0x7FFF098C; resultdsp = 1; __asm ("wrdsp $0\n\t" "mulq_rs.ph %0, %2, %3\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rs), "r"(rt) ); dsp = (dsp >> 21) & 0x01; assert(rd == result); assert(dsp == resultdsp); rs = 0x80011234; rt = 0x80024321; result = 0x7FFD098C; resultdsp = 0; __asm ("wrdsp $0\n\t" "mulq_rs.ph %0, %2, %3\n\t" "rddsp %1\n\t" : "=r"(rd), "=r"(dsp) : "r"(rs), "r"(rt) ); dsp = (dsp >> 21) & 0x01; assert(rd == result); assert(dsp == resultdsp); return 0; }