From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 3 Nov 2018 15:22:32 +0000 (+0000)
Subject: add comment on where reshape map is set up
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a57465624472875b81a812c5362eb9d5e368318b;p=riscv-isa-sim.git

add comment on where reshape map is set up
---

diff --git a/riscv/sv_insn_redirect.cc b/riscv/sv_insn_redirect.cc
index bb3dd26..eacf96d 100644
--- a/riscv/sv_insn_redirect.cc
+++ b/riscv/sv_insn_redirect.cc
@@ -125,6 +125,10 @@ unsigned int sv_proc_t::remap(reg_spec_t const& spec)
     if (shape == NULL) {
         return offs;
     }
+    // this table is pre-calculated by sv_shape_t::setup_map().
+    // changing the CSRs is the way to change the map.
+    // the map is still calculated even for the 1D case
+    // because it's a linear map
     return (unsigned int)shape->map[offs] + shape->offs;
 }