From: Dmitry Selyutin <ghostmansd@gmail.com>
Date: Sun, 30 Apr 2023 18:50:19 +0000 (+0300)
Subject: power_insn: forbid zero for non-zero operands
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d5917112f90f242d59241a83da64ce35aef83e3f;p=openpower-isa.git

power_insn: forbid zero for non-zero operands
---

diff --git a/src/openpower/decoder/power_insn.py b/src/openpower/decoder/power_insn.py
index 486d1d65..b9d92508 100644
--- a/src/openpower/decoder/power_insn.py
+++ b/src/openpower/decoder/power_insn.py
@@ -1148,6 +1148,8 @@ class NonZeroOperand(DynamicOperand):
             value = int(value, 0)
         if not isinstance(value, int):
             raise ValueError("non-integer operand")
+        if value == 0:
+            raise ValueError("non-zero operand")
         value -= 1
         return super().assemble(value=value, insn=insn)