From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Mon, 1 Oct 2018 14:08:25 +0000 (+0100)
Subject: add comment explaining use of insn._rd() in zeroing
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=dad52800dd7f1945f862df7ebf4be70517ac7ace;p=riscv-isa-sim.git

add comment explaining use of insn._rd() in zeroing
---

diff --git a/riscv/insn_template_sv.cc b/riscv/insn_template_sv.cc
index 5da73bb..475c8e5 100644
--- a/riscv/insn_template_sv.cc
+++ b/riscv/insn_template_sv.cc
@@ -48,6 +48,7 @@ reg_t FN(processor_t* p, insn_t s_insn, reg_t pc)
 #if defined(USING_REG_RD) || defined(USING_REG_FRD)
       if (zeroing && ((dest_pred & (1<<voffs)) == 0))
       {
+          // insn._rd() would be predicated: have to use insn._rd() here
           WRITE_REG(insn._rd(), 0);
       }
 #endif