From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/m68k/lib/lshrdi3.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 arch/m68k/lib/lshrdi3.c (limited to 'arch/m68k/lib/lshrdi3.c') diff --git a/arch/m68k/lib/lshrdi3.c b/arch/m68k/lib/lshrdi3.c new file mode 100644 index 0000000000..7f40566be6 --- /dev/null +++ b/arch/m68k/lib/lshrdi3.c @@ -0,0 +1,61 @@ +/* lshrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */ +/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC 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 General Public License for more details. */ + +#include +#include + +#define BITS_PER_UNIT 8 + +typedef int SItype __mode(SI); +typedef unsigned int USItype __mode(SI); +typedef int DItype __mode(DI); +typedef int word_type __mode(__word__); + +struct DIstruct {SItype high, low;}; + +typedef union +{ + struct DIstruct s; + DItype ll; +} DIunion; + +DItype +__lshrdi3 (DItype u, word_type b) +{ + DIunion w; + word_type bm; + DIunion uu; + + if (b == 0) + return u; + + uu.ll = u; + + bm = (sizeof (SItype) * BITS_PER_UNIT) - b; + if (bm <= 0) + { + w.s.high = 0; + w.s.low = (USItype)uu.s.high >> -bm; + } + else + { + USItype carries = (USItype)uu.s.high << bm; + w.s.high = (USItype)uu.s.high >> b; + w.s.low = ((USItype)uu.s.low >> b) | carries; + } + + return w.ll; +} +EXPORT_SYMBOL(__lshrdi3); -- cgit v1.2.3