mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 00:33:06 +00:00
61 lines
1.1 KiB
ArmAsm
61 lines
1.1 KiB
ArmAsm
|
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
|
||
|
|
2004, 2005, 2006
|
||
|
|
Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
* SPDX-License-Identifier: GPL-2.0+
|
||
|
|
*/
|
||
|
|
|
||
|
|
!! 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
|