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/preceq_pw_qhra.c

@@ -0,0 +1,23 @@
+#include "io.h"
+
+int main(void)
+{
+    long long rd, rt, result;
+
+    rt = 0x123456789ABCDEF0;
+    result = 0x56780000DEF00000;
+
+    __asm
+        ("preceq.pw.qhra %0, %1\n\t"
+         : "=r"(rd)
+         : "r"(rt)
+        );
+
+    if (result != rd) {
+        printf("preceq.pw.qhra error\n");
+
+        return -1;
+    }
+
+    return 0;
+}