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authorGabe Black <gblack@eecs.umich.edu>2007-03-22 04:10:57 +0000
committerGabe Black <gblack@eecs.umich.edu>2007-03-22 04:10:57 +0000
commite3d3ab451345b2aa703df0c208052c606c91d72b (patch)
treeb00f3c4399620ad06b5fd5226df8d38db50b9065 /src
parent39182808bc2e55f22788cc690fb8500c2a8dfeeb (diff)
downloadgem5-e3d3ab451345b2aa703df0c208052c606c91d72b.tar.xz
Add structure based bitfield syntax to the isa_parser. This is primarily useful for x86.
--HG-- extra : convert_revision : dfe6df160d00adec1830d9b88520ba20834d1209
Diffstat (limited to 'src')
-rwxr-xr-xsrc/arch/isa_parser.py22
1 files changed, 15 insertions, 7 deletions
diff --git a/src/arch/isa_parser.py b/src/arch/isa_parser.py
index da17f5a9d..f3981a6eb 100755
--- a/src/arch/isa_parser.py
+++ b/src/arch/isa_parser.py
@@ -81,12 +81,12 @@ tokens = reserved + (
# code literal
'CODELIT',
- # ( ) [ ] { } < > , ; : :: *
+ # ( ) [ ] { } < > , ; . : :: *
'LPAREN', 'RPAREN',
'LBRACKET', 'RBRACKET',
'LBRACE', 'RBRACE',
'LESS', 'GREATER', 'EQUALS',
- 'COMMA', 'SEMI', 'COLON', 'DBLCOLON',
+ 'COMMA', 'SEMI', 'DOT', 'COLON', 'DBLCOLON',
'ASTERISK',
# C preprocessor directives
@@ -113,6 +113,7 @@ t_GREATER = r'\>'
t_EQUALS = r'='
t_COMMA = r','
t_SEMI = r';'
+t_DOT = r'\.'
t_COLON = r':'
t_DBLCOLON = r'::'
t_ASTERISK = r'\*'
@@ -261,6 +262,7 @@ def p_defs_and_outputs_1(t):
def p_def_or_output(t):
'''def_or_output : def_format
| def_bitfield
+ | def_bitfield_struct
| def_template
| def_operand_types
| def_operands
@@ -364,15 +366,21 @@ def p_def_bitfield_1(t):
t[0] = GenCode(header_output = hash_define)
# alternate form for structure member: 'def bitfield <ID> <ID>'
-def p_def_bitfield_2(t):
- 'def_bitfield : DEF nothing BITFIELD ID ID SEMI'
+def p_def_bitfield_struct(t):
+ 'def_bitfield_struct : DEF opt_signed BITFIELD ID id_with_dot SEMI'
+ if (t[2] != ''):
+ error(t.lineno(1), 'error: structure bitfields are always unsigned.')
expr = 'machInst.%s' % t[5]
hash_define = '#undef %s\n#define %s\t%s\n' % (t[4], t[4], expr)
t[0] = GenCode(header_output = hash_define)
-def p_nothing(t):
- 'nothing : empty'
- t[0] = ''
+def p_id_with_dot_0(t):
+ 'id_with_dot : ID'
+ t[0] = t[1]
+
+def p_id_with_dot_1(t):
+ 'id_with_dot : ID DOT id_with_dot'
+ t[0] = t[1] + t[2] + t[3]
def p_opt_signed_0(t):
'opt_signed : SIGNED'