| 1 | #!/usr/bin/awk -f
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| 2 | # Script to analyze experimental results of our branch prediction heuristics
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| 3 | # Contributed by Jan Hubicka, SuSE Inc.
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| 4 | # Copyright (C) 2001 Free Software Foundation, Inc.
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| 5 | #
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| 6 | # This file is part of GNU CC.
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| 7 | #
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| 8 | # GNU CC is free software; you can redistribute it and/or modify
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| 9 | # it under the terms of the GNU General Public License as published by
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| 10 | # the Free Software Foundation; either version 2, or (at your option)
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| 11 | # any later version.
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| 12 | #
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| 13 | # GNU CC is distributed in the hope that it will be useful,
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| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | # GNU General Public License for more details.
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| 17 | #
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| 18 | # You should have received a copy of the GNU General Public License
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| 19 | # along with GNU CC; see the file COPYING. If not, write to
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| 20 | # the Free Software Foundation, 59 Temple Place - Suite 330,
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| 21 | # Boston, MA 02111-1307, USA.
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| 22 | #
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| 23 | #
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| 24 | # This script is used to calculate two basic properties of the branch prediction
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| 25 | # heuristics - coverage and hitrate. Coverage is number of executions of a given
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| 26 | # branch matched by the heuristics and hitrate is probability that once branch is
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| 27 | # predicted as taken it is really taken.
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| 28 | #
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| 29 | # These values are useful to determine the quality of given heuristics. Hitrate
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| 30 | # may be directly used in predict.c.
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