--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rd, rs, rt, dsp;
+ int result;
+
+ rs = 0x12345678;
+ rt = 0x87654321;
+ dsp = 0x0A000000;
+ result = 0x12344321;
+
+ __asm
+ ("wrdsp %3, 0x10\n\t"
+ "pick.ph %0, %1, %2\n\t"
+ : "=r"(rd)
+ : "r"(rs), "r"(rt), "r"(dsp)
+ );
+ assert(rd == result);
+
+ rs = 0x12345678;
+ rt = 0x87654321;
+ dsp = 0x03000000;
+ result = 0x12345678;
+
+ __asm
+ ("wrdsp %3, 0x10\n\t"
+ "pick.ph %0, %1, %2\n\t"
+ : "=r"(rd)
+ : "r"(rs), "r"(rt), "r"(dsp)
+ );
+ assert(rd == result);
+
+ rs = 0x12345678;
+ rt = 0x87654321;
+ dsp = 0x00000000;
+ result = 0x87654321;
+
+ __asm
+ ("wrdsp %3, 0x10\n\t"
+ "pick.ph %0, %1, %2\n\t"
+ : "=r"(rd)
+ : "r"(rs), "r"(rt), "r"(dsp)
+ );
+ assert(rd == result);
+
+ return 0;
+}