From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sun, 3 Dec 2023 11:32:28 +0000 (+0000)
Subject: bug 1231: all dc* instructions to be treated as nop
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2bc876ba071ad53a8f3ecefe1bac6b9ddde890d2;p=openpower-isa.git

bug 1231: all dc* instructions to be treated as nop

https://bugs.libre-soc.org/show_bug.cgi?id=1231#c1
---

diff --git a/src/openpower/decoder/isa/caller.py b/src/openpower/decoder/isa/caller.py
index c5ed6857..be785028 100644
--- a/src/openpower/decoder/isa/caller.py
+++ b/src/openpower/decoder/isa/caller.py
@@ -2104,6 +2104,11 @@ class ISACaller(ISACallerHelper, ISAFPHelpers, StepLoop):
             illegal = False
             ins_name = dotstrp
 
+        # match against instructions treated as nop, see nop below
+        if asmop.startswith("dc"):
+            illegal = False
+            ins_name = "nop"
+
         # branch-conditional redirects to sv.bc
         if asmop.startswith('bc') and self.is_svp64_mode:
             ins_name = 'sv.%s' % ins_name