[PATCH] fbdev: Shift pixel value before entering loop in cfbimageblit

In slow imageblit, the pixel value is shifted by a certain amount (dependent
on the bpp and endianness) for each iteration.  This is inefficient.  Better
do the shifting once before going into the loop.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/video/cfbimgblt.c b/drivers/video/cfbimgblt.c
index a7770c4f17d0..7a01742a82af 100644
--- a/drivers/video/cfbimgblt.c
+++ b/drivers/video/cfbimgblt.c
@@ -162,6 +162,8 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
         u32 i, j, l;
         
         dst2 = (u32 __iomem *) dst1;
+        fgcolor <<= LEFT_POS(bpp);
+        bgcolor <<= LEFT_POS(bpp);
 
         for (i = image->height; i--; ) {
                 shift = val = 0;
@@ -180,7 +182,6 @@ static inline void slow_imageblit(const struct fb_image *image, struct fb_info *
                 while (j--) {
                         l--;
                         color = (*s & 1 << (BIT_NR(l))) ? fgcolor : bgcolor;
-                        color <<= LEFT_POS(bpp);
                         val |= SHIFT_HIGH(color, shift);
                         
                         /* Did the bitshift spill bits to the next long? */