--- /dev/null
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+ int rs, ach, acl, dsp;
+ int result, resulth, resultl;
+
+ dsp = 0x07;
+ ach = 0x05;
+ acl = 0xB4CB;
+ rs = 0x00FFBBAA;
+ resulth = 0xB4CB;
+ resultl = 0x00FFBBAA;
+ result = 0x27;
+
+ __asm
+ ("wrdsp %0, 0x01\n\t"
+ "mthi %1, $ac1\n\t"
+ "mtlo %2, $ac1\n\t"
+ "mthlip %3, $ac1\n\t"
+ "mfhi %1, $ac1\n\t"
+ "mflo %2, $ac1\n\t"
+ "rddsp %0\n\t"
+ : "+r"(dsp), "+r"(ach), "+r"(acl)
+ : "r"(rs)
+ );
+ dsp = dsp & 0x3F;
+ assert(dsp == result);
+ assert(ach == resulth);
+ assert(acl == resultl);
+
+ dsp = 0x1f;
+ ach = 0x05;
+ acl = 0xB4CB;
+ rs = 0x00FFBBAA;
+ resulth = 0xB4CB;
+ resultl = 0x00FFBBAA;
+ result = 0x3f;
+
+ __asm
+ ("wrdsp %0, 0x01\n\t"
+ "mthi %1, $ac1\n\t"
+ "mtlo %2, $ac1\n\t"
+ "mthlip %3, $ac1\n\t"
+ "mfhi %1, $ac1\n\t"
+ "mflo %2, $ac1\n\t"
+ "rddsp %0\n\t"
+ : "+r"(dsp), "+r"(ach), "+r"(acl)
+ : "r"(rs)
+ );
+ dsp = dsp & 0x3F;
+ assert(dsp == result);
+ assert(ach == resulth);
+ assert(acl == resultl);
+
+ return 0;
+}