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Merge remote-tracking branch 'remotes/rth/tags/pull-dt-20181031' into staging

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Updates to decodetree.py for risc-v.

# gpg: Signature made Wed 31 Oct 2018 16:52:07 GMT
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-dt-20181031:
  decodetree: Allow multiple input files
  decodetree: Remove "insn" argument from trans_* expanders
  decodetree: Add !extern flag to argument sets

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
2018-11-01 18:28:29 +00:00
parent f96a3165ab 6699ae6a8e
commit ef30274865
4 changed files with 395 additions and 399 deletions
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64
scripts/decodetree.py
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@@ -63,13 +63,16 @@
#
# *** Argument set syntax:
#
# args_def := '&' identifier ( args_elt )+
# args_def := '&' identifier ( args_elt )+ ( !extern )?
# args_elt := identifier
#
# Each args_elt defines an argument within the argument set.
# Each argument set will be rendered as a C structure "arg_$name"
# with each of the fields being one of the member arguments.
#
# If !extern is specified, the backing structure is assumed to
# have been already declared, typically via a second decoder.
#
# Argument set examples:
#
# &reg3 ra rb rc
@@ -167,19 +170,20 @@ input_file = ''
output_file = None
output_fd = None
insntype = 'uint32_t'
decode_function = 'decode'
re_ident = '[a-zA-Z][a-zA-Z0-9_]*'
def error(lineno, *args):
def error_with_file(file, lineno, *args):
"""Print an error message from file:line and args and exit."""
global output_file
global output_fd
if lineno:
r = '{0}:{1}: error:'.format(input_file, lineno)
r = '{0}:{1}: error:'.format(file, lineno)
elif input_file:
r = '{0}: error:'.format(input_file)
r = '{0}: error:'.format(file)
else:
r = 'error:'
for a in args:
@@ -191,6 +195,8 @@ def error(lineno, *args):
os.remove(output_file)
exit(1)
def error(lineno, *args):
error_with_file(input_file, lineno, args)
def output(*args):
global output_fd
@@ -392,8 +398,9 @@ class FunctionField:
class Arguments:
"""Class representing the extracted fields of a format"""
def __init__(self, nm, flds):
def __init__(self, nm, flds, extern):
self.name = nm
self.extern = extern
self.fields = sorted(flds)
def __str__(self):
@@ -403,10 +410,11 @@ class Arguments:
return 'arg_' + self.name
def output_def(self):
output('typedef struct {\n')
for n in self.fields:
output(' int ', n, ';\n')
output('} ', self.struct_name(), ';\n\n')
if not self.extern:
output('typedef struct {\n')
for n in self.fields:
output(' int ', n, ';\n')
output('} ', self.struct_name(), ';\n\n')
# end Arguments
@@ -414,6 +422,7 @@ class General:
"""Common code between instruction formats and instruction patterns"""
def __init__(self, name, lineno, base, fixb, fixm, udfm, fldm, flds):
self.name = name
self.file = input_file
self.lineno = lineno
self.base = base
self.fixedbits = fixb
@@ -460,20 +469,19 @@ class Pattern(General):
output('typedef ', self.base.base.struct_name(),
' arg_', self.name, ';\n')
output(translate_scope, 'bool ', translate_prefix, '_', self.name,
'(DisasContext *ctx, arg_', self.name,
' *a, ', insntype, ' insn);\n')
'(DisasContext *ctx, arg_', self.name, ' *a);\n')
def output_code(self, i, extracted, outerbits, outermask):
global translate_prefix
ind = str_indent(i)
arg = self.base.base.name
output(ind, '/* line ', str(self.lineno), ' */\n')
output(ind, '/* ', self.file, ':', str(self.lineno), ' */\n')
if not extracted:
output(ind, self.base.extract_name(), '(&u.f_', arg, ', insn);\n')
for n, f in self.fields.items():
output(ind, 'u.f_', arg, '.', n, ' = ', f.str_extract(), ';\n')
output(ind, 'return ', translate_prefix, '_', self.name,
'(ctx, &u.f_', arg, ', insn);\n')
'(ctx, &u.f_', arg, ');\n')
# end Pattern
@@ -540,7 +548,11 @@ def parse_arguments(lineno, name, toks):
global re_ident
flds = []
extern = False
for t in toks:
if re_fullmatch('!extern', t):
extern = True
continue
if not re_fullmatch(re_ident, t):
error(lineno, 'invalid argument set token "{0}"'.format(t))
if t in flds:
@@ -549,7 +561,7 @@ def parse_arguments(lineno, name, toks):
if name in arguments:
error(lineno, 'duplicate argument set', name)
arguments[name] = Arguments(name, flds)
arguments[name] = Arguments(name, flds, extern)
# end parse_arguments
@@ -573,13 +585,14 @@ def add_field_byname(lineno, flds, new_name, old_name):
def infer_argument_set(flds):
global arguments
global decode_function
for arg in arguments.values():
if eq_fields_for_args(flds, arg.fields):
return arg
name = str(len(arguments))
arg = Arguments(name, flds.keys())
name = decode_function + str(len(arguments))
arg = Arguments(name, flds.keys(), False)
arguments[name] = arg
return arg
@@ -587,6 +600,7 @@ def infer_argument_set(flds):
def infer_format(arg, fieldmask, flds):
global arguments
global formats
global decode_function
const_flds = {}
var_flds = {}
@@ -606,7 +620,7 @@ def infer_format(arg, fieldmask, flds):
continue
return (fmt, const_flds)
name = 'Fmt_' + str(len(formats))
name = decode_function + '_Fmt_' + str(len(formats))
if not arg:
arg = infer_argument_set(flds)
@@ -909,8 +923,9 @@ def build_tree(pats, outerbits, outermask):
if innermask == 0:
pnames = []
for p in pats:
pnames.append(p.name + ':' + str(p.lineno))
error(pats[0].lineno, 'overlapping patterns:', pnames)
pnames.append(p.name + ':' + p.file + ':' + str(p.lineno))
error_with_file(pats[0].file, pats[0].lineno,
'overlapping patterns:', pnames)
fullmask = outermask | innermask
@@ -971,8 +986,8 @@ def main():
global insnwidth
global insntype
global insnmask
global decode_function
decode_function = 'decode'
decode_scope = 'static '
long_opts = ['decode=', 'translate=', 'output=', 'insnwidth=']
@@ -1001,10 +1016,11 @@ def main():
if len(args) < 1:
error(0, 'missing input file')
input_file = args[0]
f = open(input_file, 'r')
parse_file(f)
f.close()
for filename in args:
input_file = filename
f = open(filename, 'r')
parse_file(f)
f.close()
t = build_tree(patterns, 0, 0)
prop_format(t)