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Store instruction description as namedtuple

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This commit is contained in:
Alexis Engelke
2019-02-23 11:53:25 +01:00
parent 3fbd0ff5b5
commit 50ba38627b
1 changed files with 25 additions and 25 deletions
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50
parseinstrs.py
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@@ -1,7 +1,7 @@
#!/usr/bin/python3
from binascii import unhexlify
from collections import OrderedDict, defaultdict
from collections import OrderedDict, defaultdict, namedtuple
from copy import copy
from enum import Enum, IntEnum
from itertools import accumulate
@@ -91,29 +91,30 @@ OPKIND_LOOKUP = {
"FPU": (0, 0),
}
def parse_desc(desc, ignore_flag):
desc = desc.split()
if ignore_flag in desc[6:]:
return None
class InstrDesc(namedtuple("InstrDesc", "mnemonic,flags,encoding")):
__slots__ = ()
@classmethod
def parse(cls, desc):
desc = desc.split()
fixed_opsz = set()
opsizes = 0
for i, opkind in enumerate(desc[1:5]):
enc_size, fixed_size = OPKIND_LOOKUP[opkind]
if enc_size == 1: fixed_opsz.add(fixed_size)
opsizes |= enc_size << 2 * i
fixed_opsz = set()
opsizes = 0
for i, opkind in enumerate(desc[1:5]):
enc_size, fixed_size = OPKIND_LOOKUP[opkind]
if enc_size == 1: fixed_opsz.add(fixed_size)
opsizes |= enc_size << 2 * i
flags = copy(ENCODINGS[desc[0]])
flags.operand_sizes = opsizes
if fixed_opsz: flags.gp_fixed_operand_size = next(iter(fixed_opsz))
flags = copy(ENCODINGS[desc[0]])
flags.operand_sizes = opsizes
if fixed_opsz: flags.gp_fixed_operand_size = next(iter(fixed_opsz))
# Miscellaneous Flags
if "DEF64" in desc[6:]: flags.gp_size_def64 = 1
if "SIZE_8" in desc[6:]: flags.gp_size_8 = 1
if "INSTR_WIDTH" in desc[6:]: flags.gp_instr_width = 1
if "IMM_8" in desc[6:]: flags.imm_byte = 1
# Miscellaneous Flags
if "DEF64" in desc[6:]: flags.gp_size_def64 = 1
if "SIZE_8" in desc[6:]: flags.gp_size_8 = 1
if "INSTR_WIDTH" in desc[6:]: flags.gp_instr_width = 1
if "IMM_8" in desc[6:]: flags.imm_byte = 1
return desc[5], flags._encode()
return cls(desc[5], frozenset(desc[6:]), flags._encode())
class EntryKind(Enum):
NONE = 0
@@ -303,7 +304,7 @@ if __name__ == "__main__":
if line and line[0] != "#":
opcode_string, desc = tuple(line.split(maxsplit=1))
for opcode in parse_opcode(opcode_string):
entries[opcode].append(desc)
entries[opcode].append(InstrDesc.parse(desc))
mnemonics = set()
table32 = Table()
@@ -311,12 +312,11 @@ if __name__ == "__main__":
masks = "ONLY64", "ONLY32"
for opcode, descs in entries.items():
for table, ignore_mask in zip((table32, table64), masks):
parsed = [parse_desc(desc, ignore_mask) for desc in descs]
parsed = [desc for desc in parsed if desc is not None]
parsed = [desc for desc in descs if ignore_mask not in desc.flags]
assert len(parsed) <= 1
if parsed:
mnemonics.add(parsed[0][0])
table.add_opcode(opcode, parsed[0])
mnemonics.add(parsed[0].mnemonic)
table.add_opcode(opcode, (parsed[0].mnemonic, parsed[0].encoding))
table32.deduplicate()
table64.deduplicate()