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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
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6
apps/plugins/alpine_cdc.c
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@ -669,16 +669,16 @@ void dump_packet(char* dest, int dst_size, char* src, int n)
bool bit_test(unsigned char* buf, unsigned bit)
{
return (buf[bit/4] & (0x01 << bit%4)) != 0;
return (buf[bit>>2] & BIT_N(bit&3)) != 0;
}
void bit_set(unsigned char* buf, unsigned bit, bool val)
{
if (val)
buf[bit/4] |= (0x01 << bit%4);
buf[bit>>2] |= BIT_N(bit&3);
else
buf[bit/4] &= ~(0x01 << bit%4);
buf[bit>>2] &= ~BIT_N(bit&3);
}