From: Christopher Celio <celio@eecs.berkeley.edu>
Date: Wed, 29 Jan 2014 01:06:27 +0000 (-0800)
Subject: Disasm now translates xor x0,x0,x0 as a machine-generated bubble ("-").
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0346522aa6ca2a91f2d32f824646febc6dff1fc8;p=riscv-isa-sim.git

Disasm now translates xor x0,x0,x0 as a machine-generated bubble ("-").

  It is very convenient for pipeline trace viewing to differentiate
  between compiler NOPs and pipeline bubbles.
---

diff --git a/spike/disasm.cc b/spike/disasm.cc
index 31e4068..e4e7315 100644
--- a/spike/disasm.cc
+++ b/spike/disasm.cc
@@ -247,6 +247,7 @@ disassembler_t::disassembler_t()
   DEFINE_ITYPE(jalr);
 
   add_insn(new disasm_insn_t("nop", match_addi, mask_addi | mask_rd | mask_rs1 | mask_imm, {}));
+  add_insn(new disasm_insn_t(" - ", match_xor, mask_xor | mask_rd | mask_rs1 | mask_rs2, {})); // for machine-generated bubbles
   DEFINE_I0TYPE("li", addi);
   DEFINE_I1TYPE("move", addi);
   DEFINE_ITYPE(addi);