From 251b2b17b35e7c78d53e82695650ce66925823b2 Mon Sep 17 00:00:00 2001 From: Ahmad Fatoum Date: Thu, 18 Feb 2021 10:39:01 +0100 Subject: lib: remove duplicate __div64_32 f933da28cf3f ("include: : sync with upstream") imported the div64 code from Linux, which also defines __div64_32 as a weak symbol. __div64_32 was defined before in a separate file though and used from do_div. Remove this duplication. No functional change. Signed-off-by: Ahmad Fatoum Signed-off-by: Sascha Hauer --- lib/Makefile | 2 -- lib/div64.c | 54 ------------------------------------------------------ lib/math/Makefile | 1 + 3 files changed, 1 insertion(+), 56 deletions(-) delete mode 100644 lib/div64.c (limited to 'lib') diff --git a/lib/Makefile b/lib/Makefile index 9c6f4133d7..9b37d847e0 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -9,8 +9,6 @@ obj-y += kstrtox.o obj-y += vsprintf.o obj-$(CONFIG_KASAN) += kasan/ pbl-$(CONFIG_PBL_CONSOLE) += vsprintf.o -obj-y += div64.o -pbl-y += div64.o obj-y += misc.o obj-$(CONFIG_PARAMETER) += parameter.o obj-y += xfuncs.o diff --git a/lib/div64.c b/lib/div64.c deleted file mode 100644 index 0196725ce9..0000000000 --- a/lib/div64.c +++ /dev/null @@ -1,54 +0,0 @@ -/* - * Copyright (C) 2003 Bernardo Innocenti - * - * Based on former do_div() implementation from asm-parisc/div64.h: - * Copyright (C) 1999 Hewlett-Packard Co - * Copyright (C) 1999 David Mosberger-Tang - * - * - * Generic C version of 64bit/32bit division and modulo, with - * 64bit result and 32bit remainder. - * - * The fast case for (n>>32 == 0) is handled inline by do_div(). - * - * Code generated for this function might be very inefficient - * for some CPUs. __div64_32() can be overridden by linking arch-specific - * assembly versions such as arch/ppc/lib/div64.S and arch/sh/lib/div64.S. - */ - -#include - -#include - -uint32_t __div64_32(uint64_t *n, uint32_t base) -{ - uint64_t rem = *n; - uint64_t b = base; - uint64_t res, d = 1; - uint32_t high = rem >> 32; - - /* Reduce the thing a bit first */ - res = 0; - if (high >= base) { - high /= base; - res = (uint64_t) high << 32; - rem -= (uint64_t) (high*base) << 32; - } - - while ((int64_t)b > 0 && b < rem) { - b = b+b; - d = d+d; - } - - do { - if (rem >= b) { - rem -= b; - res += d; - } - b >>= 1; - d >>= 1; - } while (d); - - *n = res; - return rem; -} diff --git a/lib/math/Makefile b/lib/math/Makefile index 3341a8e474..c2c892dd55 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -1 +1,2 @@ obj-y += div64.o +pbl-y += div64.o -- cgit v1.2.3