u-boot/arch/sh/lib/lshiftrt.S

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/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005, 2006
Free Software Foundation, Inc.
This file 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.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)
This file 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; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
!! 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 */
!
! __lshrsi3)
!
! Entry:
!
! r4: Value to shift
! r5: Shifts
!
! Exit:
!
! r0: Result
!
! Destroys:
!
! (none)
!
.global __lshrsi3
.align 2
__lshrsi3:
mov #31,r0
and r0,r5
mova __lshrsi3_table,r0
mov.b @(r0,r5),r5
#ifdef __sh1__
add r5,r0
jmp @r0
#else
braf r5
#endif
mov r4,r0
.align 2
__lshrsi3_table:
.byte __lshrsi3_0-__lshrsi3_table
.byte __lshrsi3_1-__lshrsi3_table
.byte __lshrsi3_2-__lshrsi3_table
.byte __lshrsi3_3-__lshrsi3_table
.byte __lshrsi3_4-__lshrsi3_table
.byte __lshrsi3_5-__lshrsi3_table
.byte __lshrsi3_6-__lshrsi3_table
.byte __lshrsi3_7-__lshrsi3_table
.byte __lshrsi3_8-__lshrsi3_table
.byte __lshrsi3_9-__lshrsi3_table
.byte __lshrsi3_10-__lshrsi3_table
.byte __lshrsi3_11-__lshrsi3_table
.byte __lshrsi3_12-__lshrsi3_table
.byte __lshrsi3_13-__lshrsi3_table
.byte __lshrsi3_14-__lshrsi3_table
.byte __lshrsi3_15-__lshrsi3_table
.byte __lshrsi3_16-__lshrsi3_table
.byte __lshrsi3_17-__lshrsi3_table
.byte __lshrsi3_18-__lshrsi3_table
.byte __lshrsi3_19-__lshrsi3_table
.byte __lshrsi3_20-__lshrsi3_table
.byte __lshrsi3_21-__lshrsi3_table
.byte __lshrsi3_22-__lshrsi3_table
.byte __lshrsi3_23-__lshrsi3_table
.byte __lshrsi3_24-__lshrsi3_table
.byte __lshrsi3_25-__lshrsi3_table
.byte __lshrsi3_26-__lshrsi3_table
.byte __lshrsi3_27-__lshrsi3_table
.byte __lshrsi3_28-__lshrsi3_table
.byte __lshrsi3_29-__lshrsi3_table
.byte __lshrsi3_30-__lshrsi3_table
.byte __lshrsi3_31-__lshrsi3_table
__lshrsi3_6:
shlr2 r0
__lshrsi3_4:
shlr2 r0
__lshrsi3_2:
rts
shlr2 r0
__lshrsi3_7:
shlr2 r0
__lshrsi3_5:
shlr2 r0
__lshrsi3_3:
shlr2 r0
__lshrsi3_1:
rts
shlr r0
__lshrsi3_14:
shlr2 r0
__lshrsi3_12:
shlr2 r0
__lshrsi3_10:
shlr2 r0
__lshrsi3_8:
rts
shlr8 r0
__lshrsi3_15:
shlr2 r0
__lshrsi3_13:
shlr2 r0
__lshrsi3_11:
shlr2 r0
__lshrsi3_9:
shlr8 r0
rts
shlr r0
__lshrsi3_22:
shlr2 r0
__lshrsi3_20:
shlr2 r0
__lshrsi3_18:
shlr2 r0
__lshrsi3_16:
rts
shlr16 r0
__lshrsi3_23:
shlr2 r0
__lshrsi3_21:
shlr2 r0
__lshrsi3_19:
shlr2 r0
__lshrsi3_17:
shlr16 r0
rts
shlr r0
__lshrsi3_30:
shlr2 r0
__lshrsi3_28:
shlr2 r0
__lshrsi3_26:
shlr2 r0
__lshrsi3_24:
shlr16 r0
rts
shlr8 r0
__lshrsi3_31:
shlr2 r0
__lshrsi3_29:
shlr2 r0
__lshrsi3_27:
shlr2 r0
__lshrsi3_25:
shlr16 r0
shlr8 r0
rts
shlr r0
__lshrsi3_0:
rts
nop