You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.4 KiB
63 lines
1.4 KiB
#!/usr/bin/env python
|
|
|
|
# ULP error plot tool.
|
|
#
|
|
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
# See https://llvm.org/LICENSE.txt for license information.
|
|
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
import numpy as np
|
|
import matplotlib.pyplot as plt
|
|
import sys
|
|
import re
|
|
|
|
# example usage:
|
|
# build/bin/ulp -e .0001 log 0.5 2.0 2345678 | math/tools/plot.py
|
|
|
|
def fhex(s):
|
|
return float.fromhex(s)
|
|
|
|
def parse(f):
|
|
xs = []
|
|
gs = []
|
|
ys = []
|
|
es = []
|
|
# Has to match the format used in ulp.c
|
|
r = re.compile(r'[^ (]+\(([^ )]*)\) got ([^ ]+) want ([^ ]+) [^ ]+ ulp err ([^ ]+)')
|
|
for line in f:
|
|
m = r.match(line)
|
|
if m:
|
|
x = fhex(m.group(1))
|
|
g = fhex(m.group(2))
|
|
y = fhex(m.group(3))
|
|
e = float(m.group(4))
|
|
xs.append(x)
|
|
gs.append(g)
|
|
ys.append(y)
|
|
es.append(e)
|
|
elif line.startswith('PASS') or line.startswith('FAIL'):
|
|
# Print the summary line
|
|
print(line)
|
|
return xs, gs, ys, es
|
|
|
|
def plot(xs, gs, ys, es):
|
|
if len(xs) < 2:
|
|
print('not enough samples')
|
|
return
|
|
a = min(xs)
|
|
b = max(xs)
|
|
fig, (ax0,ax1) = plt.subplots(nrows=2)
|
|
es = np.abs(es) # ignore the sign
|
|
emax = max(es)
|
|
ax0.text(a+(b-a)*0.7, emax*0.8, '%s\n%g'%(emax.hex(),emax))
|
|
ax0.plot(xs,es,'r.')
|
|
ax0.grid()
|
|
ax1.plot(xs,ys,'r.',label='want')
|
|
ax1.plot(xs,gs,'b.',label='got')
|
|
ax1.grid()
|
|
ax1.legend()
|
|
plt.show()
|
|
|
|
xs, gs, ys, es = parse(sys.stdin)
|
|
plot(xs, gs, ys, es)
|