png_log8bit       794 contrib/libtests/tarith.c          double error = png_log8bit(i) - correct;
png_log8bit       799 contrib/libtests/tarith.c          if (i == 0 && png_log8bit(i) != 0xffffffff ||
png_log8bit       800 contrib/libtests/tarith.c              i != 0 && png_log8bit(i) != floor(correct+.5))
png_log8bit       803 contrib/libtests/tarith.c                i, png_log8bit(i), correct);
png_log8bit      3694 png.c                   png_int_32 lg2 = png_log8bit(value);