devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

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.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21205 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2009-06-07 21:27:05 +00:00
parent c3182ec333
commit 1d6df54df2
24 changed files with 88 additions and 70 deletions
Download patch file Download diff file Expand all files Collapse all files

4
apps/plugins/jpeg/jpeg_decoder.c
View file

@ -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)