MIPS: Fix simulator data trace for DSLL and BAL/BGEZAL.

src/mips/disasm-mips.cc

Index: src/mips/disasm-mips.cc
diff --git a/src/mips/disasm-mips.cc b/src/mips/disasm-mips.cc
index 48427c54558650e2e3d2a8402af116ac5ba8f227..1d505750a5026626ecf97708c61d36288a248c3f 100644
--- a/src/mips/disasm-mips.cc
+++ b/src/mips/disasm-mips.cc
@@ -1346,9 +1346,13 @@ void Decoder::DecodeTypeImmediate(Instruction* instr) {
         case BGEZ:
           Format(instr, "bgez    'rs, 'imm16u -> 'imm16p4s2");
           break;
-        case BGEZAL:
-          Format(instr, "bgezal  'rs, 'imm16u -> 'imm16p4s2");
+        case BGEZAL: {
+          if (instr->RsValue() == 0)
+            Format(instr, "bal     'imm16s -> 'imm16p4s2");
+          else
+            Format(instr, "bgezal  'rs, 'imm16u -> 'imm16p4s2");
           break;
+        }
         case BGEZALL:
           Format(instr, "bgezall 'rs, 'imm16u -> 'imm16p4s2");
           break;