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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.

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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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4
apps/plugins/zxbox/spkey.c
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@ -85,7 +85,7 @@ int spkb_state_changed;
#define SKE {0, 0, 0, 0, 0, 0, 0, 0}
#define SKP(x) (1 << x)
#define SKP(x) BIT_N(x)
#define SKN0(x) {SKP(x), 0, 0, 0, 0, 0, 0, 0}
#define SKN1(x) {0, SKP(x), 0, 0, 0, 0, 0, 0}
@ -617,7 +617,7 @@ static void copy_basekeys(struct spbasekey *addk)
static unsigned transform_shift(int modif)
{
if(!modif) return 0;
else return (1 << (modif - 1));
else return BIT_N(modif - 1);
}