u-boot/arch/sh/lib/udiv_qrnnd.S
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

59 lines
1.1 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006
Free Software Foundation, Inc.
*/
!! libgcc routines for the Renesas / SuperH SH CPUs.
!! Contributed by Steve Chamberlain.
!! sac@cygnus.com
!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
!! recoded in assembly by Toshiyasu Morita
!! tm@netcom.com
/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
ELF local label prefixes by J"orn Rennecke
amylaar@cygnus.com */
/* r0: rn r1: qn */ /* r0: n1 r4: n0 r5: d r6: d1 */ /* r2: __m */
/* n1 < d, but n1 might be larger than d1. */
.global __udiv_qrnnd_16
.balign 8
__udiv_qrnnd_16:
div0u
cmp/hi r6,r0
bt .Lots
.rept 16
div1 r6,r0
.endr
extu.w r0,r1
bt 0f
add r6,r0
0: rotcl r1
mulu.w r1,r5
xtrct r4,r0
swap.w r0,r0
sts macl,r2
cmp/hs r2,r0
sub r2,r0
bt 0f
addc r5,r0
add #-1,r1
bt 0f
1: add #-1,r1
rts
add r5,r0
.balign 8
.Lots:
sub r5,r0
swap.w r4,r1
xtrct r0,r1
clrt
mov r1,r0
addc r5,r0
mov #-1,r1
bf/s 1b
shlr16 r1
0: rts
nop