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author | Henrik Gramner <henrik@gramner.com> | 2015-07-11 20:32:11 +0200 |
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committer | Janne Grunau <janne-libav@jannau.net> | 2015-07-12 16:39:07 +0200 |
commit | 8bc67ec2c0d2b5444d51a1bed1d50f0e10d92717 (patch) | |
tree | 1fdb18b27eb19ac28461c715cb1fb369243fa1e7 /libavfilter | |
parent | 796268654c7807c9a1cfb322c838383e2b900d60 (diff) | |
download | ffmpeg-8bc67ec2c0d2b5444d51a1bed1d50f0e10d92717.tar.gz |
Checkasm: assembly testing and benchmarking tool
It provides the following features:
* verify correctness by comparing output to the C version.
* detect failure to save and restore clobbered callee-saved registers.
* detect 32-bit parameters being used as if they were 64-bit in x86-64
(the upper halves are not guaranteed to be zero - but in practice
they very often are, which makes those bugs hard to spot otherwise).
* easy benchmarking.
Compile by running 'make checkasm'.
Execute by running 'tests/checkasm/checkasm'.
Optional arguments are '--bench' to run benchmarks for all functions,
'--bench=<pattern>' to run benchmarks for all functions that starts with
<pattern>, and '<integer>' to seed the PRNG for reproducible results.
Contains unit tests for most h264pred functions to get started, more tests
can be added afterwards using those as a reference.
Loosely based on code from x264. Currently only supports x86 and x86-64,
but additional architectures shouldn't be too much of an obstacle to add.
Note that functions with floating point parameters or floating point
return values are not supported. Some compiler-specific features or
preprocessor hacks would likely be required to add support for that.
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
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