f98ee40f4b
This is an ongoing series of commits that are reformatting our Python code. This catches the last of the python files to reformat. Since they where so few I bunched them together. Reformatting is done with `black`. If you end up having problems merging this commit because you have made changes to a python file, the best way to handle that is to run git checkout --ours <yourfile> and then reformat it with black. If you run into any problems, post to discourse about it and we will try to help. RFC Thread below: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Reviewed By: jhenderson, #libc, Mordante, sivachandra Differential Revision: https://reviews.llvm.org/D150784
67 lines
1.6 KiB
Python
Executable File
67 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
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# ULP error plot tool.
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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import numpy as np
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import matplotlib.pyplot as plt
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import sys
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import re
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# example usage:
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# build/bin/ulp -e .0001 log 0.5 2.0 2345678 | math/tools/plot.py
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def fhex(s):
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return float.fromhex(s)
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def parse(f):
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xs = []
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gs = []
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ys = []
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es = []
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# Has to match the format used in ulp.c
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r = re.compile(r"[^ (]+\(([^ )]*)\) got ([^ ]+) want ([^ ]+) [^ ]+ ulp err ([^ ]+)")
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for line in f:
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m = r.match(line)
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if m:
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x = fhex(m.group(1))
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g = fhex(m.group(2))
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y = fhex(m.group(3))
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e = float(m.group(4))
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xs.append(x)
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gs.append(g)
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ys.append(y)
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es.append(e)
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elif line.startswith("PASS") or line.startswith("FAIL"):
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# Print the summary line
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print(line)
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return xs, gs, ys, es
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def plot(xs, gs, ys, es):
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if len(xs) < 2:
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print("not enough samples")
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return
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a = min(xs)
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b = max(xs)
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fig, (ax0, ax1) = plt.subplots(nrows=2)
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es = np.abs(es) # ignore the sign
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emax = max(es)
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ax0.text(a + (b - a) * 0.7, emax * 0.8, "%s\n%g" % (emax.hex(), emax))
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ax0.plot(xs, es, "r.")
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ax0.grid()
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ax1.plot(xs, ys, "r.", label="want")
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ax1.plot(xs, gs, "b.", label="got")
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ax1.grid()
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ax1.legend()
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plt.show()
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xs, gs, ys, es = parse(sys.stdin)
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plot(xs, gs, ys, es)
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