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| author | Moritz Hanke <hanke@dkrz.de> | 2014-09-09 16:56:05 +0200 |
|---|---|---|
| committer | Mathis Rosenhauer <rosenhauer@dkrz.de> | 2014-10-24 16:08:27 +0200 |
| commit | e601c7d8712fca7a3b6e1b8e89ea2b7b0bd08a26 (patch) | |
| tree | 509e3d9193d429d95fdf92a896f5808e0f6eb805 | |
| parent | 9af97721e78da0c2e5be2f82ee8ca9d0fb951ddc (diff) | |
| download | libaec-e601c7d8712fca7a3b6e1b8e89ea2b7b0bd08a26.tar.gz libaec-e601c7d8712fca7a3b6e1b8e89ea2b7b0bd08a26.tar.bz2 libaec-e601c7d8712fca7a3b6e1b8e89ea2b7b0bd08a26.zip | |
replaces subtraction with XOR in FLUSH
| -rw-r--r-- | src/decode.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/decode.c b/src/decode.c index a8c0afc..22487fd 100644 --- a/src/decode.c +++ b/src/decode.c @@ -105,10 +105,11 @@ data = d; \ } \ } else { \ - if (half_d <= xmax - data) { \ + /*in this case (xmax - data == xmax ^ data)*/ \ + if (half_d <= (xmax ^ data)) { \ data += (d >> 1)^(~((d & 1) - 1)); \ } else { \ - data = xmax - d; \ + data = xmax ^ d; \ } \ } \ put_##KIND(strm, (uint32_t)data); \ |