Minor usability improvements (#48)

[riscv-isa-sim.git] / spike_main / disasm.cc

diff --git a/spike_main/disasm.cc b/spike_main/disasm.cc
index 0d239d74df6dbda9f48fa7c58c15257e0d0d061a..65977fc681144eb4bd933364c299b907ededb416 100644 (file)
--- a/spike_main/disasm.cc
+++ b/spike_main/disasm.cc
@@ -7,7 +7,6 @@
 #include <sstream>
 #include <stdlib.h>
 
-
 struct : public arg_t {
   std::string to_string(insn_t insn) const {
     return std::to_string((int)insn.i_imm()) + '(' + xpr_name[insn.rs1()] + ')';
@@ -75,7 +74,12 @@ struct : public arg_t {
       #define DECLARE_CSR(name, num) case num: return #name;
       #include "encoding.h"
       #undef DECLARE_CSR
-      default: return "unknown";
+      default:
+      {
+        char buf[16];
+        snprintf(buf, sizeof buf, "unknown_%03" PRIx64, insn.csr());
+        return std::string(buf);
+      }
     }
   }
 } csr;