--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rd, rs, rt, dsp;
+ int result, resultdsp;
+
+ rs = 0x03FB1234;
+ rt = 0x0BCC4321;
+ result = 0x7fff7FFF;
+ resultdsp = 1;
+
+ __asm
+ ("mul_s.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 = 0x7fffff00;
+ rt = 0xff007fff;
+ result = 0x80008000;
+ resultdsp = 1;
+
+ __asm
+ ("mul_s.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);
+
+ dsp = 0;
+ __asm
+ ("wrdsp %0\n\t"
+ :
+ : "r"(dsp)
+ );
+
+ rs = 0x00320001;
+ rt = 0x00210002;
+ result = 0x06720002;
+ resultdsp = 0;
+
+ __asm
+ ("mul_s.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;
+}