target/mips: tests/tcg: Add optional printing of more detailed failure info

There is a need for printing input and output data for failure cases,
for debugging purpose. This is achieved by this patch, and only if a
preprocessor constant is manually set to 1. (Assumption is that the
need for such printout is relatively rare.)
Signed-off-by: NAleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: NAleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1566216496-17375-37-git-send-email-aleksandar.markovic@rt-rk.com>

tests/tcg/mips/include/test_utils_128.h

@@ -27,7 +27,8 @@
 #include <inttypes.h>
 #include <string.h>
 
-#define PRINT_RESULTS 0
+#define PRINT_RESULTS    0
+#define PRINT_FAILURES   0
 
 
 static inline int32_t check_results_128(const char *isa_ase_name,
@@ -65,6 +66,26 @@ static inline int32_t check_results_128(const char *isa_ase_name,
             (b128_result[2 * i + 1] == b128_expect[2 * i + 1])) {
             pass_count++;
         } else {
+#if PRINT_FAILURES
+            uint32_t ii;
+            uint64_t a, b;
+
+            printf("\n");
+
+            printf("FAILURE for test case %d!\n", i);
+
+            memcpy(&a, (b128_expect + 2 * i), 8);
+            memcpy(&b, (b128_expect + 2 * i + 1), 8);
+            printf("Expected result : { 0x%016llxULL, 0x%016llxULL, },\n",
+                   a, b);
+
+            memcpy(&a, (b128_result + 2 * i), 8);
+            memcpy(&b, (b128_result + 2 * i + 1), 8);
+            printf("Actual result   : { 0x%016llxULL, 0x%016llxULL, },\n",
+                   a, b);
+
+            printf("\n");
+#endif
             fail_count++;
         }
     }