From: Dmitry Selyutin <ghostmansd@gmail.com>
Date: Wed, 31 May 2023 21:04:13 +0000 (+0300)
Subject: power_insn: forbid r0 for RA0 and RT0
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0fb1a8383152c4eb080cb84bc6c161c7e599da8d;p=openpower-isa.git

power_insn: forbid r0 for RA0 and RT0
---

diff --git a/src/openpower/decoder/power_insn.py b/src/openpower/decoder/power_insn.py
index f93037dd..d480a3f3 100644
--- a/src/openpower/decoder/power_insn.py
+++ b/src/openpower/decoder/power_insn.py
@@ -1264,6 +1264,8 @@ class ExtendableOperand(DynamicOperand):
                 value = value[1:]
                 vector = True
             if value.startswith(prefix):
+                if (self.extra_reg.or_zero and (value == f"{prefix}0")):
+                    raise ValueError(value)
                 value = value[len(prefix):]
             value = int(value, 0)