arch/sh/lib/ashrsi3.S

   1 /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2    2004, 2005, 2006
   3    Free Software Foundation, Inc.
   4
   5 This file is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 In addition to the permissions in the GNU General Public License, the
  11 Free Software Foundation gives you unlimited permission to link the
  12 compiled version of this file into combinations with other programs,
  13 and to distribute those combinations without any restriction coming
  14 from the use of this file.  (The General Public License restrictions
  15 do apply in other respects; for example, they cover modification of
  16 the file, and distribution when not linked into a combine
  17 executable.)
  18
  19 This file is distributed in the hope that it will be useful, but
  20 WITHOUT ANY WARRANTY; without even the implied warranty of
  21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22 General Public License for more details.
  23
  24 You should have received a copy of the GNU General Public License
  25 along with this program; see the file COPYING.  If not, write to
  26 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  27 Boston, MA 02110-1301, USA.  */
  28
  29 !! libgcc routines for the Renesas / SuperH SH CPUs.
  30 !! Contributed by Steve Chamberlain.
  31 !! sac@cygnus.com
  32
  33 !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
  34 !! recoded in assembly by Toshiyasu Morita
  35 !! tm@netcom.com
  36
  37 /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
  38    ELF local label prefixes by J"orn Rennecke
  39    amylaar@cygnus.com  */
  40
  41 !
  42 ! __ashrsi3
  43 !
  44 ! Entry:
  45 !
  46 ! r4: Value to shift
  47 ! r5: Shifts
  48 !
  49 ! Exit:
  50 !
  51 ! r0: Result
  52 !
  53 ! Destroys:
  54 !
  55 ! (none)
  56 !
  57
  58         .global __ashrsi3
  59
  60         .align  2
  61 __ashrsi3:
  62         mov     #31,r0
  63         and     r0,r5
  64         mova    ashrsi3_table,r0
  65         mov.b   @(r0,r5),r5
  66 #ifdef __sh1__
  67         add     r5,r0
  68         jmp     @r0
  69 #else
  70         braf    r5
  71 #endif
  72         mov     r4,r0
  73
  74         .align  2
  75 ashrsi3_table:
  76         .byte           ashrsi3_0-ashrsi3_table
  77         .byte           ashrsi3_1-ashrsi3_table
  78         .byte           ashrsi3_2-ashrsi3_table
  79         .byte           ashrsi3_3-ashrsi3_table
  80         .byte           ashrsi3_4-ashrsi3_table
  81         .byte           ashrsi3_5-ashrsi3_table
  82         .byte           ashrsi3_6-ashrsi3_table
  83         .byte           ashrsi3_7-ashrsi3_table
  84         .byte           ashrsi3_8-ashrsi3_table
  85         .byte           ashrsi3_9-ashrsi3_table
  86         .byte           ashrsi3_10-ashrsi3_table
  87         .byte           ashrsi3_11-ashrsi3_table
  88         .byte           ashrsi3_12-ashrsi3_table
  89         .byte           ashrsi3_13-ashrsi3_table
  90         .byte           ashrsi3_14-ashrsi3_table
  91         .byte           ashrsi3_15-ashrsi3_table
  92         .byte           ashrsi3_16-ashrsi3_table
  93         .byte           ashrsi3_17-ashrsi3_table
  94         .byte           ashrsi3_18-ashrsi3_table
  95         .byte           ashrsi3_19-ashrsi3_table
  96         .byte           ashrsi3_20-ashrsi3_table
  97         .byte           ashrsi3_21-ashrsi3_table
  98         .byte           ashrsi3_22-ashrsi3_table
  99         .byte           ashrsi3_23-ashrsi3_table
 100         .byte           ashrsi3_24-ashrsi3_table
 101         .byte           ashrsi3_25-ashrsi3_table
 102         .byte           ashrsi3_26-ashrsi3_table
 103         .byte           ashrsi3_27-ashrsi3_table
 104         .byte           ashrsi3_28-ashrsi3_table
 105         .byte           ashrsi3_29-ashrsi3_table
 106         .byte           ashrsi3_30-ashrsi3_table
 107         .byte           ashrsi3_31-ashrsi3_table
 108
 109 ashrsi3_31:
 110         rotcl   r0
 111         rts
 112         subc    r0,r0
 113
 114 ashrsi3_30:
 115         shar    r0
 116 ashrsi3_29:
 117         shar    r0
 118 ashrsi3_28:
 119         shar    r0
 120 ashrsi3_27:
 121         shar    r0
 122 ashrsi3_26:
 123         shar    r0
 124 ashrsi3_25:
 125         shar    r0
 126 ashrsi3_24:
 127         shlr16  r0
 128         shlr8   r0
 129         rts
 130         exts.b  r0,r0
 131
 132 ashrsi3_23:
 133         shar    r0
 134 ashrsi3_22:
 135         shar    r0
 136 ashrsi3_21:
 137         shar    r0
 138 ashrsi3_20:
 139         shar    r0
 140 ashrsi3_19:
 141         shar    r0
 142 ashrsi3_18:
 143         shar    r0
 144 ashrsi3_17:
 145         shar    r0
 146 ashrsi3_16:
 147         shlr16  r0
 148         rts
 149         exts.w  r0,r0
 150
 151 ashrsi3_15:
 152         shar    r0
 153 ashrsi3_14:
 154         shar    r0
 155 ashrsi3_13:
 156         shar    r0
 157 ashrsi3_12:
 158         shar    r0
 159 ashrsi3_11:
 160         shar    r0
 161 ashrsi3_10:
 162         shar    r0
 163 ashrsi3_9:
 164         shar    r0
 165 ashrsi3_8:
 166         shar    r0
 167 ashrsi3_7:
 168         shar    r0
 169 ashrsi3_6:
 170         shar    r0
 171 ashrsi3_5:
 172         shar    r0
 173 ashrsi3_4:
 174         shar    r0
 175 ashrsi3_3:
 176         shar    r0
 177 ashrsi3_2:
 178         shar    r0
 179 ashrsi3_1:
 180         rts
 181         shar    r0
 182
 183 ashrsi3_0:
 184         rts
 185         nop