jvm-op-words.py

# https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-6.html

from bs4 import BeautifulSoup
soup = BeautifulSoup(open('jvms-6.html', encoding='ISO8859').read(), 'html.parser')

ops = {
    div['title']: {
        'words': len(div.find('div', {'class': 'literallayout'}).find_all('br')) - 1,
        'opcodes': [
            int(p.text.split(' ')[2])
            for p in div.find('div', {'title': 'Forms'}).find_all('p')
        ],
    }
    for div in soup.find_all('div', {'class': 'section-execution'})[1:]
}


words = [None] * 256
for op in ops.values():
    for opcode in op['opcodes']:
        words[opcode] = op['words']


print('  '.join([' '] + [f'{x:x}' for x in range(16)]))
for h in range(16):
    print(f'{h:x}', end='')
    for l in range(16):
        x = str(words[h << 4 | l] or ' ')
        print(f'{x:>3}', end='')
    print()

output

   0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
1  2  3  2  3  3  2  2  2  2  2  1  1  1  1  1  1
2  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
3  1  1  1  1  1  1  2  2  2  2  2  1  1  1  1  1
4  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
5  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
6  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
7  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
8  1  1  1  1  3  1  1  1  1  1  1  1  1  1  1  1
9  1  1  1  1  1  1  1  1  1  3  3  3  3  3  3  3
a  3  3  3  3  3  3  3  3  3  2 15 11  1  1  1  1
b  1  1  3  3  3  3  3  3  3  5  5  3  2  3  1  1
c  3  3  1  1  4  4  3  3  5  5
d
e
f