From 22596383f3b8c7cd8a06570957face3875a73d3b Mon Sep 17 00:00:00 2001 From: James Almer Date: Mon, 16 Feb 2015 16:53:31 -0300 Subject: [PATCH] avcodec/hevcdsp: optimize pixel comparison in sao_edge_filter GCC 4.9.2 on a Core i5-4200U @ 1.60GHz, Linux x86_64 Before 715487 decicycles in sao_edge_filter_8, 262144 runs, 0 skips After 672104 decicycles in sao_edge_filter_8, 262144 runs, 0 skips Reviewed-by: Michael Niedermayer Signed-off-by: James Almer --- libavcodec/hevcdsp_template.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/hevcdsp_template.c b/libavcodec/hevcdsp_template.c index 9ce7bf2630..aeb142ca29 100644 --- a/libavcodec/hevcdsp_template.c +++ b/libavcodec/hevcdsp_template.c @@ -325,7 +325,7 @@ static void FUNC(sao_band_filter_0)(uint8_t *_dst, uint8_t *_src, } } -#define CMP(a, b) ((a) > (b) ? 1 : ((a) == (b) ? 0 : -1)) +#define CMP(a, b) ((a > b) - (a < b)) static void FUNC(sao_edge_filter)(uint8_t *_dst, uint8_t *_src, ptrdiff_t stride_dst, int16_t *sao_offset_val, int eo, int width, int height) {