[Qemu-devel] [5723] target-mips: avoid tcg internal error in mfc0/dmfc0

[Aurelien Jarno]

Revision: 5723
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5723
Author:   aurel32
Date:     2008-11-15 12:12:08 +0000 (Sat, 15 Nov 2008)

Log Message:
-----------
target-mips: avoid tcg internal error in mfc0/dmfc0

Set t0 to 0 for unimplemented mfc0/dmfc0 instructions. This fixes a tcg
internal error while booting mips linux.

Noticed by Julia Longtin.

Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/target-mips/translate.c

Modified: trunk/target-mips/translate.c
===================================================================
--- trunk/target-mips/translate.c       2008-11-14 17:20:15 UTC (rev 5722)
+++ trunk/target-mips/translate.c       2008-11-15 12:12:08 UTC (rev 5723)
@@ -3186,7 +3186,7 @@
         }
         break;
     case 22:
-        /* ignored */
+        tcg_gen_movi_tl(t0, 0); /* unimplemented */
         rn = "'Diagnostic"; /* implementation dependent */
         break;
     case 23:
@@ -3266,12 +3266,13 @@
         }
         break;
     case 26:
-       rn = "ECC";
-       break;
+        tcg_gen_movi_tl(t0, 0); /* unimplemented */
+        rn = "ECC";
+        break;
     case 27:
         switch (sel) {
-        /* ignored */
         case 0 ... 3:
+            tcg_gen_movi_tl(t0, 0); /* unimplemented */
             rn = "CacheErr";
             break;
         default:
@@ -4372,7 +4373,7 @@
         }
         break;
     case 22:
-        /* ignored */
+        tcg_gen_movi_tl(t0, 0); /* unimplemented */
         rn = "'Diagnostic"; /* implementation dependent */
         break;
     case 23:
@@ -4451,12 +4452,14 @@
         }
         break;
     case 26:
-       rn = "ECC";
-       break;
+        tcg_gen_movi_tl(t0, 0); /* unimplemented */
+        rn = "ECC";
+        break;
     case 27:
         switch (sel) {
         /* ignored */
         case 0 ... 3:
+            tcg_gen_movi_tl(t0, 0); /* unimplemented */
             rn = "CacheErr";
             break;
         default:
@@ -8013,7 +8016,7 @@
                 case OPC_EMT:
                     check_insn(env, ctx, ASE_MT);
                     tcg_gen_helper_1_1(do_emt, t0, t0);
-                     break;
+                    break;
                 case OPC_DVPE:
                     check_insn(env, ctx, ASE_MT);
                     tcg_gen_helper_1_1(do_dvpe, t0, t0);