From 1d6df54df27cb41c02226678a2c8f9feddd1a1e0 Mon Sep 17 00:00:00 2001
From: Jens Arnold <amiconn@rockbox.org>
Date: Sun, 7 Jun 2009 21:27:05 +0000
Subject: 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
---
 apps/plugins/jpeg/jpeg_decoder.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'apps/plugins/jpeg/jpeg_decoder.c')

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)
-- 
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