From f97fa3dcb2db02013e6904c032a1d2d45707ee40 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 3 Jul 2023 16:52:08 +0300 Subject: lib/math: Move dvb_math.c into lib/math/int_log.c Some existing and new users may benefit from the intlog2() and intlog10() APIs, make them wide available. Reviewed-by: Mauro Carvalho Chehab Acked-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/20230619172019.21457-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko Reviewed-by: Randy Dunlap Link: https://lore.kernel.org/r/20230703135211.87416-2-andriy.shevchenko@linux.intel.com Signed-off-by: Mark Brown --- include/media/dvb_math.h | 66 ------------------------------------------------ 1 file changed, 66 deletions(-) delete mode 100644 include/media/dvb_math.h (limited to 'include/media') diff --git a/include/media/dvb_math.h b/include/media/dvb_math.h deleted file mode 100644 index 8690ec42954d..000000000000 --- a/include/media/dvb_math.h +++ /dev/null @@ -1,66 +0,0 @@ -/* - * dvb-math provides some complex fixed-point math - * operations shared between the dvb related stuff - * - * Copyright (C) 2006 Christoph Pfister (christophpfister@gmail.com) - * - * This library is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as - * published by the Free Software Foundation; either version 2.1 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - */ - -#ifndef __DVB_MATH_H -#define __DVB_MATH_H - -#include - -/** - * intlog2 - computes log2 of a value; the result is shifted left by 24 bits - * - * @value: The value (must be != 0) - * - * to use rational values you can use the following method: - * - * intlog2(value) = intlog2(value * 2^x) - x * 2^24 - * - * Some usecase examples: - * - * intlog2(8) will give 3 << 24 = 3 * 2^24 - * - * intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24 - * - * intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24 - * - * - * return: log2(value) * 2^24 - */ -extern unsigned int intlog2(u32 value); - -/** - * intlog10 - computes log10 of a value; the result is shifted left by 24 bits - * - * @value: The value (must be != 0) - * - * to use rational values you can use the following method: - * - * intlog10(value) = intlog10(value * 10^x) - x * 2^24 - * - * An usecase example: - * - * intlog10(1000) will give 3 << 24 = 3 * 2^24 - * - * due to the implementation intlog10(1000) might be not exactly 3 * 2^24 - * - * look at intlog2 for similar examples - * - * return: log10(value) * 2^24 - */ -extern unsigned int intlog10(u32 value); - -#endif -- cgit v1.2.3