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/mips32-dsp/mult.c

@@ -0,0 +1,24 @@
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+    int rs, rt, ach, acl;
+    int result, resulth, resultl;
+
+    rs  = 0x00FFBBAA;
+    rt  = 0x4B231000;
+    resulth = 0x4b0f01;
+    resultl = 0x71f8a000;
+    __asm
+        ("mult $ac1, %2, %3\n\t"
+         "mfhi %0, $ac1\n\t"
+         "mflo %1, $ac1\n\t"
+         : "=r"(ach), "=r"(acl)
+         : "r"(rs), "r"(rt)
+        );
+    assert(ach == resulth);
+    assert(acl == resultl);
+
+    return 0;
+}