| 1 | #! /usr/bin/python |
| 2 | ### -*-python-*- |
| 3 | ### |
| 4 | ### Generate input script and expected output for bit manipulation, |
| 5 | ### particularly 64-bit arithmetic. |
| 6 | |
| 7 | import sys as SYS |
| 8 | import random as R |
| 9 | |
| 10 | NVEC = 64 |
| 11 | WD = 64 |
| 12 | LIMIT = 1 << WD |
| 13 | MASK = LIMIT - 1 |
| 14 | |
| 15 | SYS.argv.pop() |
| 16 | def arg(default = None): |
| 17 | if len(SYS.argv): |
| 18 | return SYS.argv.pop() |
| 19 | else: |
| 20 | return default |
| 21 | |
| 22 | R.seed(None) |
| 23 | SEED = int(arg(R.randrange(0, 1 << 32))) |
| 24 | R.seed(SEED) |
| 25 | |
| 26 | print '### Test vectors for 64-bit arithmetic macros' |
| 27 | print '### [generated; seed = 0x%08x]' % SEED |
| 28 | |
| 29 | def rol(x, n): return ((x << n) | (x >> (WD - n))) & MASK |
| 30 | def ror(x, n): return ((x >> n) | (x << (WD - n))) & MASK |
| 31 | def put(x): return '%0*x' % (WD/4, x) |
| 32 | |
| 33 | for name, func in [('lsl', lambda x, n: x << n), |
| 34 | ('lsr', lambda x, n: x >> n), |
| 35 | ('rol', rol), |
| 36 | ('ror', ror)]: |
| 37 | print '\n%s64 {' % name |
| 38 | for i in xrange(NVEC): |
| 39 | x = R.randrange(LIMIT) |
| 40 | sh = R.randrange(0, 70) & 63 |
| 41 | print ' %s %2d %s;' % (put(x), sh, put(func(x, sh) & MASK)) |
| 42 | for i in xrange(4): |
| 43 | x = R.randrange(LIMIT) |
| 44 | sh = 32 |
| 45 | print ' %s %2d %s;' % (put(x), sh, put(func(x, sh) & MASK)) |
| 46 | print '}' |
| 47 | |
| 48 | for name, func in [('add', lambda x, y: x + y), |
| 49 | ('sub', lambda x, y: x - y)]: |
| 50 | print '\n%s64 {' % name |
| 51 | for i in xrange(NVEC): |
| 52 | x = R.randrange(LIMIT) |
| 53 | y = R.randrange(LIMIT) |
| 54 | print ' %s %s %s;' % (put(x), put(y), put(func(x, y) & MASK)) |
| 55 | print '}' |