target-mips: Add ASE DSP testcases

Add MIPS ASE DSP testcases.

Signed-off-by: Jia Liu <proljc@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

tests/tcg/mips/mips64-dsp/replv_ph.c

@@ -0,0 +1,22 @@
+#include "io.h"
+
+int main(void)
+{
+    long long rd, rt;
+    long long result;
+
+    rt = 0x12345678;
+    result = 0x56785678;
+    __asm
+        ("replv.ph %0, %1\n\t"
+         : "=r"(rd)
+         : "r"(rt)
+        );
+    if (rd != result) {
+        printf("replv.ph wrong\n");
+
+        return -1;
+    }
+
+    return 0;
+}