mirror of
https://github.com/RPCS3/llvm.git
synced 2024-11-26 21:20:29 +00:00
e6e5fbb671
generated ARM match table, which is substantially more efficient than dealing with tblgen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123252 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
#!/usr/bin/env python
|
|
|
|
def analyze_match_table(path):
|
|
# Extract the instruction table.
|
|
data = open(path).read()
|
|
start = data.index("static const MatchEntry MatchTable")
|
|
end = data.index("\n};\n", start)
|
|
lines = data[start:end].split("\n")[1:]
|
|
|
|
# Parse the instructions.
|
|
insns = []
|
|
for ln in lines:
|
|
ln = ln.split("{", 1)[1]
|
|
ln = ln.rsplit("}", 1)[0]
|
|
a,bc = ln.split("{", 1)
|
|
b,c = bc.split("}", 1)
|
|
code, string, converter, _ = [s.strip()
|
|
for s in a.split(",")]
|
|
items = [s.strip() for s in b.split(",")]
|
|
_,features = [s.strip() for s in c.split(",")]
|
|
assert string[0] == string[-1] == '"'
|
|
string = string[1:-1]
|
|
insns.append((code,string,converter,items,features))
|
|
|
|
# For every mnemonic, compute whether or not it can have a carry setting
|
|
# operand and whether or not it can have a predication code.
|
|
mnemonic_flags = {}
|
|
for insn in insns:
|
|
mnemonic = insn[1]
|
|
items = insn[3]
|
|
flags = mnemonic_flags[mnemonic] = mnemonic_flags.get(mnemonic, set())
|
|
flags.update(items)
|
|
|
|
mnemonics = set(mnemonic_flags)
|
|
ccout_mnemonics = set(m for m in mnemonics
|
|
if 'MCK_CCOut' in mnemonic_flags[m])
|
|
condcode_mnemonics = set(m for m in mnemonics
|
|
if 'MCK_CondCode' in mnemonic_flags[m])
|
|
noncondcode_mnemonics = mnemonics - condcode_mnemonics
|
|
print ' || '.join('Mnemonic == "%s"' % m
|
|
for m in ccout_mnemonics)
|
|
print ' || '.join('Mnemonic == "%s"' % m
|
|
for m in noncondcode_mnemonics)
|
|
|
|
def main():
|
|
import sys
|
|
if len(sys.argv) == 1:
|
|
import os
|
|
from lit.Util import capture
|
|
llvm_obj_root = capture(["llvm-config", "--obj-root"])
|
|
file = os.path.join(llvm_obj_root,
|
|
"lib/Target/ARM/ARMGenAsmMatcher.inc")
|
|
elif len(sys.argv) == 2:
|
|
file = sys.argv[1]
|
|
else:
|
|
raise NotImplementedError
|
|
|
|
analyze_match_table(file)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|