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 ! __ashrsi3_r0
  58 !
  59 ! Entry:
  60 !
  61 ! r4: Value to shift
  62 ! r0: Shifts
  63 !
  64 ! Exit:
  65 !
  66 ! r0: Result
  67 !
  68 ! Destroys:
  69 !
  70 ! (none)
  71
  72         .global __ashrsi3
  73         .global __ashrsi3_r0
  74
  75         .align  2
  76 __ashrsi3:
  77         mov     r5,r0
  78         .align  2
  79 __ashrsi3_r0:
  80         and     #31,r0
  81         mov.l   r4,@-r15
  82         mov     r0,r4
  83         mova    ashrsi3_table,r0
  84         mov.b   @(r0,r4),r4
  85         add     r4,r0
  86         jmp     @r0
  87         mov.l   @r15+,r0
  88
  89         .align  2
  90 ashrsi3_table:
  91         .byte           ashrsi3_0-ashrsi3_table
  92         .byte           ashrsi3_1-ashrsi3_table
  93         .byte           ashrsi3_2-ashrsi3_table
  94         .byte           ashrsi3_3-ashrsi3_table
  95         .byte           ashrsi3_4-ashrsi3_table
  96         .byte           ashrsi3_5-ashrsi3_table
  97         .byte           ashrsi3_6-ashrsi3_table
  98         .byte           ashrsi3_7-ashrsi3_table
  99         .byte           ashrsi3_8-ashrsi3_table
 100         .byte           ashrsi3_9-ashrsi3_table
 101         .byte           ashrsi3_10-ashrsi3_table
 102         .byte           ashrsi3_11-ashrsi3_table
 103         .byte           ashrsi3_12-ashrsi3_table
 104         .byte           ashrsi3_13-ashrsi3_table
 105         .byte           ashrsi3_14-ashrsi3_table
 106         .byte           ashrsi3_15-ashrsi3_table
 107         .byte           ashrsi3_16-ashrsi3_table
 108         .byte           ashrsi3_17-ashrsi3_table
 109         .byte           ashrsi3_18-ashrsi3_table
 110         .byte           ashrsi3_19-ashrsi3_table
 111         .byte           ashrsi3_20-ashrsi3_table
 112         .byte           ashrsi3_21-ashrsi3_table
 113         .byte           ashrsi3_22-ashrsi3_table
 114         .byte           ashrsi3_23-ashrsi3_table
 115         .byte           ashrsi3_24-ashrsi3_table
 116         .byte           ashrsi3_25-ashrsi3_table
 117         .byte           ashrsi3_26-ashrsi3_table
 118         .byte           ashrsi3_27-ashrsi3_table
 119         .byte           ashrsi3_28-ashrsi3_table
 120         .byte           ashrsi3_29-ashrsi3_table
 121         .byte           ashrsi3_30-ashrsi3_table
 122         .byte           ashrsi3_31-ashrsi3_table
 123
 124 ashrsi3_31:
 125         rotcl   r0
 126         rts
 127         subc    r0,r0
 128
 129 ashrsi3_30:
 130         shar    r0
 131 ashrsi3_29:
 132         shar    r0
 133 ashrsi3_28:
 134         shar    r0
 135 ashrsi3_27:
 136         shar    r0
 137 ashrsi3_26:
 138         shar    r0
 139 ashrsi3_25:
 140         shar    r0
 141 ashrsi3_24:
 142         shlr16  r0
 143         shlr8   r0
 144         rts
 145         exts.b  r0,r0
 146
 147 ashrsi3_23:
 148         shar    r0
 149 ashrsi3_22:
 150         shar    r0
 151 ashrsi3_21:
 152         shar    r0
 153 ashrsi3_20:
 154         shar    r0
 155 ashrsi3_19:
 156         shar    r0
 157 ashrsi3_18:
 158         shar    r0
 159 ashrsi3_17:
 160         shar    r0
 161 ashrsi3_16:
 162         shlr16  r0
 163         rts
 164         exts.w  r0,r0
 165
 166 ashrsi3_15:
 167         shar    r0
 168 ashrsi3_14:
 169         shar    r0
 170 ashrsi3_13:
 171         shar    r0
 172 ashrsi3_12:
 173         shar    r0
 174 ashrsi3_11:
 175         shar    r0
 176 ashrsi3_10:
 177         shar    r0
 178 ashrsi3_9:
 179         shar    r0
 180 ashrsi3_8:
 181         shar    r0
 182 ashrsi3_7:
 183         shar    r0
 184 ashrsi3_6:
 185         shar    r0
 186 ashrsi3_5:
 187         shar    r0
 188 ashrsi3_4:
 189         shar    r0
 190 ashrsi3_3:
 191         shar    r0
 192 ashrsi3_2:
 193         shar    r0
 194 ashrsi3_1:
 195         rts
 196         shar    r0
 197
 198 ashrsi3_0:
 199         rts
 200         nop