From 0d37dbf9e4dbf100237f1353de19886fe5386cc8 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Wed, 6 Apr 2022 20:17:16 +0100
Subject: [PATCH] clarify comments on EXTRA2 exceptions for encoding regnums

---
 src/openpower/sv/trans/svp64.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py
index 65aa1768..7faf37b9 100644
--- a/src/openpower/sv/trans/svp64.py
+++ b/src/openpower/sv/trans/svp64.py
@@ -488,7 +488,7 @@ class SVP64Asm:
                         # all good: encode as scalar
                         sv_extra = sv_extra & 0b01
                     else:
-                        # range is r0-r127 in increments of 4
+                        # range is r0-r127 in increments of 2 (r0 r2 ... r126)
                         assert sv_extra & 0b01 == 0, \
                             "%s: vector field %s cannot fit " \
                             "into EXTRA2 %s" % \
@@ -1222,6 +1222,7 @@ if __name__ == '__main__':
     lst = [
         'sv.bc/all 3,12,192',
         'sv.bclr/vsbi 3,81.v,192',
+        'sv.ld 5.v, 4(1.v)',
     ]
     isa = SVP64Asm(lst, macros=macros)
     print("list", list(isa))
-- 
2.30.2