From f3f8aff4aefa36e0af4c9afe2d6e5913d2e78328 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 27 Oct 2023 15:46:12 +0100
Subject: [PATCH] add LSHIFT and RSHIFT operators to parser. reluctantly

---
 src/openpower/decoder/pseudo/lexer.py  | 4 ++++
 src/openpower/decoder/pseudo/parser.py | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/src/openpower/decoder/pseudo/lexer.py b/src/openpower/decoder/pseudo/lexer.py
index b454b2ac..c42f8330 100644
--- a/src/openpower/decoder/pseudo/lexer.py
+++ b/src/openpower/decoder/pseudo/lexer.py
@@ -343,6 +343,8 @@ class PowerLexer:
         'GTU',
         'NE',
         'LE',
+        'LSHIFT',
+        'RSHIFT',
         'GE',
         'LT',
         'GT',
@@ -410,6 +412,8 @@ class PowerLexer:
     t_NE = r'!='
     t_LE = r'<='
     t_GE = r'>='
+    t_LSHIFT = r'<<'
+    t_RSHIFT = r'>>'
     t_LT = r'<'
     t_GT = r'>'
     t_PLUS = r'\+'
diff --git a/src/openpower/decoder/pseudo/parser.py b/src/openpower/decoder/pseudo/parser.py
index 8e913244..d0a2630a 100644
--- a/src/openpower/decoder/pseudo/parser.py
+++ b/src/openpower/decoder/pseudo/parser.py
@@ -87,6 +87,8 @@ binary_ops = {
     "|": ast.BitOr(),
     "+": ast.Add(),
     "-": ast.Sub(),
+    "<<": ast.LShift(),
+    ">>": ast.RShift(),
     "*": ast.Mult(),
     "/": ast.FloorDiv(),
     "%": ast.Mod(),
@@ -184,6 +186,7 @@ class PowerParser:
         ("left", "BITOR"),
         ("left", "BITXOR"),
         ("left", "BITAND"),
+        ("left", "LSHIFT", "RSHIFT"),
         ("left", "PLUS", "MINUS"),
         ("left", "MULT", "DIV", "MOD"),
         ("left", "INVERT"),
@@ -575,6 +578,8 @@ class PowerParser:
         """comparison : comparison PLUS comparison
                       | comparison MINUS comparison
                       | comparison MULT comparison
+                      | comparison LSHIFT comparison
+                      | comparison RSHIFT comparison
                       | comparison DIV comparison
                       | comparison MOD comparison
                       | comparison EQ comparison
-- 
2.30.2