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/rddsp.c

@@ -0,0 +1,54 @@
+#include<stdio.h>
+#include<assert.h>
+
+int main()
+{
+    int dsp_i, dsp_o;
+    int ccond_i, outflag_i, efi_i, c_i, scount_i, pos_i;
+    int ccond_o, outflag_o, efi_o, c_o, scount_o, pos_o;
+    int ccond_r, outflag_r, efi_r, c_r, scount_r, pos_r;
+
+    ccond_i   = 0x000000BC;/* 4 */
+    outflag_i = 0x0000001B;/* 3 */
+    efi_i     = 0x00000001;/* 5 */
+    c_i       = 0x00000001;/* 2 */
+    scount_i  = 0x0000000F;/* 1 */
+    pos_i     = 0x0000000C;/* 0 */
+
+    dsp_i = (ccond_i   << 24) | \
+            (outflag_i << 16) | \
+            (efi_i     << 14) | \
+            (c_i       << 13) | \
+            (scount_i  <<  7) | \
+            pos_i;
+
+    ccond_r   = ccond_i;
+    outflag_r = outflag_i;
+    efi_r     = efi_i;
+    c_r       = c_i;
+    scount_r  = scount_i;
+    pos_r     = pos_i;
+
+    __asm
+        ("wrdsp %1, 0x3F\n\t"
+         "rddsp %0, 0x3F\n\t"
+         : "=r"(dsp_o)
+         : "r"(dsp_i)
+        );
+
+    ccond_o   = (dsp_o >> 24) & 0xFF;
+    outflag_o = (dsp_o >> 16) & 0xFF;
+    efi_o     = (dsp_o >> 14) & 0x01;
+    c_o       = (dsp_o >> 14) & 0x01;
+    scount_o  = (dsp_o >>  7) & 0x3F;
+    pos_o     =  dsp_o & 0x1F;
+
+    assert(ccond_o   == ccond_r);
+    assert(outflag_o == outflag_r);
+    assert(efi_o     == efi_r);
+    assert(c_o       == c_r);
+    assert(scount_o  == scount_r);
+    assert(pos_o     == pos_r);
+
+    return 0;
+}