From: Steinar H. Gunderson <sesse@debian.org>
Date: Mon, 1 Jun 2009 00:56:01 +0000 (+0200)
Subject: Yet another microoptimization in the driver.
X-Git-Url: https://git.sesse.net/?p=fjl;a=commitdiff_plain;h=165a5b18aeeaaa0f27ea63c8c0d0bcbe87bc5aaa

Yet another microoptimization in the driver.
---

diff --git a/driver.c b/driver.c
index 616b613..d5bec84 100644
--- a/driver.c
+++ b/driver.c
@@ -180,6 +180,7 @@ void read_scan(struct byte_source* source, struct jpeg_image* image, huffman_tab
 						unsigned rs = read_huffman_symbol_no_refill(ac_table, &bits);
 						unsigned r = rs >> 4;
 						unsigned s = rs & 0xf;
+						i += r;
 
 						if (rs == 0x00) {
 							/* end of block */
@@ -188,10 +189,8 @@ void read_scan(struct byte_source* source, struct jpeg_image* image, huffman_tab
 						if (rs == 0xf0) {
 							/* 16 zero coefficients */
 							possibly_refill(&bits, DEHUF_TABLE_BITS);
-							i += 15;
 							continue;
 						}
-						i += r;
 
 						possibly_refill(&bits, s + DEHUF_TABLE_BITS);
 						coeff[unzigzag[i]] = extend(read_bits(&bits, s), s);