mirror of
https://github.com/torvalds/linux
synced 2024-07-23 03:29:48 +00:00
b35cd9884f
Many ports (m32r, microblaze, mips, parisc, score, and sparc) use functionally identical copies of various GCC library routine files, which came up as we were submitting the RISC-V port (which also uses some of these). This patch adds a new copy of these library routine files, which are functionally identical to the various other copies. These are availiable via Kconfig as CONFIG_GENERIC_$ROUTINE, which currently isn't used anywhere. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
|
|
* This program 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 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
|
|
#include <lib/libgcc.h>
|
|
|
|
long long notrace __ashldi3(long long u, word_type b)
|
|
{
|
|
DWunion uu, w;
|
|
word_type bm;
|
|
|
|
if (b == 0)
|
|
return u;
|
|
|
|
uu.ll = u;
|
|
bm = 32 - b;
|
|
|
|
if (bm <= 0) {
|
|
w.s.low = 0;
|
|
w.s.high = (unsigned int) uu.s.low << -bm;
|
|
} else {
|
|
const unsigned int carries = (unsigned int) uu.s.low >> bm;
|
|
|
|
w.s.low = (unsigned int) uu.s.low << b;
|
|
w.s.high = ((unsigned int) uu.s.high << b) | carries;
|
|
}
|
|
|
|
return w.ll;
|
|
}
|
|
EXPORT_SYMBOL(__ashldi3);
|