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| author | Jens Arnold <amiconn@rockbox.org> | 2009-06-07 21:27:05 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2009-06-07 21:27:05 +0000 |
| commit | 1d6df54df27cb41c02226678a2c8f9feddd1a1e0 (patch) | |
| tree | 5fdc6dd98ac0208f5c3351b062063af6914cbefb /apps/plugins/jpeg/jpeg_decoder.c | |
| parent | c3182ec333982e961d3babfbdb1125fd5bac7fb8 (diff) | |
| download | rockbox-1d6df54df27cb41c02226678a2c8f9feddd1a1e0.zip rockbox-1d6df54df27cb41c02226678a2c8f9feddd1a1e0.tar.gz rockbox-1d6df54df27cb41c02226678a2c8f9feddd1a1e0.tar.bz2 rockbox-1d6df54df27cb41c02226678a2c8f9feddd1a1e0.tar.xz | |
Convert a number of places in core and plugins to use the BIT_N() macro instead of 1<<n. Speeds up things on SH1, and also reduces core binsize. Most notable speedups: 1 bit lcd driver: drawpixel +20%, drawline + 27%, hline +5%; jpeg viewer: +8% for 1/8 scaling. Other targets are unaffected.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21205 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/jpeg/jpeg_decoder.c')
| -rw-r--r-- | apps/plugins/jpeg/jpeg_decoder.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/apps/plugins/jpeg/jpeg_decoder.c b/apps/plugins/jpeg/jpeg_decoder.c index 71d5088..c90bff8 100644 --- a/apps/plugins/jpeg/jpeg_decoder.c +++ b/apps/plugins/jpeg/jpeg_decoder.c @@ -1067,12 +1067,12 @@ INLINE void check_bit_buffer(struct bitstream* pb, int nbits) INLINE int get_bits(struct bitstream* pb, int nbits) { - return ((int) (pb->get_buffer >> (pb->bits_left -= nbits))) & ((1<<nbits)-1); + return ((int) (pb->get_buffer >> (pb->bits_left -= nbits))) & (BIT_N(nbits)-1); } INLINE int peek_bits(struct bitstream* pb, int nbits) { - return ((int) (pb->get_buffer >> (pb->bits_left - nbits))) & ((1<<nbits)-1); + return ((int) (pb->get_buffer >> (pb->bits_left - nbits))) & (BIT_N(nbits)-1); } INLINE void drop_bits(struct bitstream* pb, int nbits) |