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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/sudoku/generator.c
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@ -54,7 +54,7 @@
#define STATE_MASK 0x0000ff80
#define STATE_SHIFT (7-1) /* digits 1..9 */
#define DIGIT_STATE(digit) (1<<(STATE_SHIFT+(digit)))
#define DIGIT_STATE(digit) BIT_N(STATE_SHIFT+(digit))
#define DIGIT_MASK 0x000f0000
#define DIGIT_SHIFT 16
@ -266,7 +266,7 @@ numset( int mask )
{
int i, n = 0;
for( i = STATE_SHIFT + 1 ; i <= STATE_SHIFT + 9 ; ++i )
if( mask & (1<<i) )
if( mask & BIT_N(i) )
++n;
else
++counts[ i - STATE_SHIFT - 1 ];