--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rd, rt, dsp;
+ int result, resultdsp;
+
+ rt = 0x87654321;
+ result = 0x87654321;
+ resultdsp = 0x00;
+
+ __asm
+ ("wrdsp $0\n\t"
+ "shll.qb %0, %2, 0x00\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dsp)
+ : "r"(rt)
+ );
+ dsp = (dsp >> 22) & 0x01;
+ assert(dsp == resultdsp);
+ assert(rd == result);
+
+ rt = 0x87654321;
+ result = 0x38281808;
+ resultdsp = 0x01;
+
+ __asm
+ ("wrdsp $0\n\t"
+ "shll.qb %0, %2, 0x03\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dsp)
+ : "r"(rt)
+ );
+ dsp = (dsp >> 22) & 0x01;
+ assert(dsp == resultdsp);
+ assert(rd == result);
+
+ rt = 0x00000001;
+ result = 0x00000080;
+ resultdsp = 0x00;
+
+ __asm
+ ("wrdsp $0\n\t"
+ "shll.qb %0, %2, 0x07\n\t"
+ "rddsp %1\n\t"
+ : "=r"(rd), "=r"(dsp)
+ : "r"(rt)
+ );
+ dsp = (dsp >> 22) & 0x01;
+ assert(dsp == resultdsp);
+ assert(rd == result);
+
+ return 0;
+}