arch/sh/lib/ashlsi3.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 ! __ashlsi3
  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         .global __ashlsi3
  58
  59         .align  2
  60 __ashlsi3:
  61         mov     #31,r0
  62         and     r0,r5
  63         mova    ashlsi3_table,r0
  64         mov.b   @(r0,r5),r5
  65 #ifdef __sh1__
  66         add     r5,r0
  67         jmp     @r0
  68 #else
  69         braf    r5
  70 #endif
  71         mov     r4,r0
  72
  73         .align  2
  74 ashlsi3_table:
  75         .byte           ashlsi3_0-ashlsi3_table
  76         .byte           ashlsi3_1-ashlsi3_table
  77         .byte           ashlsi3_2-ashlsi3_table
  78         .byte           ashlsi3_3-ashlsi3_table
  79         .byte           ashlsi3_4-ashlsi3_table
  80         .byte           ashlsi3_5-ashlsi3_table
  81         .byte           ashlsi3_6-ashlsi3_table
  82         .byte           ashlsi3_7-ashlsi3_table
  83         .byte           ashlsi3_8-ashlsi3_table
  84         .byte           ashlsi3_9-ashlsi3_table
  85         .byte           ashlsi3_10-ashlsi3_table
  86         .byte           ashlsi3_11-ashlsi3_table
  87         .byte           ashlsi3_12-ashlsi3_table
  88         .byte           ashlsi3_13-ashlsi3_table
  89         .byte           ashlsi3_14-ashlsi3_table
  90         .byte           ashlsi3_15-ashlsi3_table
  91         .byte           ashlsi3_16-ashlsi3_table
  92         .byte           ashlsi3_17-ashlsi3_table
  93         .byte           ashlsi3_18-ashlsi3_table
  94         .byte           ashlsi3_19-ashlsi3_table
  95         .byte           ashlsi3_20-ashlsi3_table
  96         .byte           ashlsi3_21-ashlsi3_table
  97         .byte           ashlsi3_22-ashlsi3_table
  98         .byte           ashlsi3_23-ashlsi3_table
  99         .byte           ashlsi3_24-ashlsi3_table
 100         .byte           ashlsi3_25-ashlsi3_table
 101         .byte           ashlsi3_26-ashlsi3_table
 102         .byte           ashlsi3_27-ashlsi3_table
 103         .byte           ashlsi3_28-ashlsi3_table
 104         .byte           ashlsi3_29-ashlsi3_table
 105         .byte           ashlsi3_30-ashlsi3_table
 106         .byte           ashlsi3_31-ashlsi3_table
 107
 108 ashlsi3_6:
 109         shll2   r0
 110 ashlsi3_4:
 111         shll2   r0
 112 ashlsi3_2:
 113         rts
 114         shll2   r0
 115
 116 ashlsi3_7:
 117         shll2   r0
 118 ashlsi3_5:
 119         shll2   r0
 120 ashlsi3_3:
 121         shll2   r0
 122 ashlsi3_1:
 123         rts
 124         shll    r0
 125
 126 ashlsi3_14:
 127         shll2   r0
 128 ashlsi3_12:
 129         shll2   r0
 130 ashlsi3_10:
 131         shll2   r0
 132 ashlsi3_8:
 133         rts
 134         shll8   r0
 135
 136 ashlsi3_15:
 137         shll2   r0
 138 ashlsi3_13:
 139         shll2   r0
 140 ashlsi3_11:
 141         shll2   r0
 142 ashlsi3_9:
 143         shll8   r0
 144         rts
 145         shll    r0
 146
 147 ashlsi3_22:
 148         shll2   r0
 149 ashlsi3_20:
 150         shll2   r0
 151 ashlsi3_18:
 152         shll2   r0
 153 ashlsi3_16:
 154         rts
 155         shll16  r0
 156
 157 ashlsi3_23:
 158         shll2   r0
 159 ashlsi3_21:
 160         shll2   r0
 161 ashlsi3_19:
 162         shll2   r0
 163 ashlsi3_17:
 164         shll16  r0
 165         rts
 166         shll    r0
 167
 168 ashlsi3_30:
 169         shll2   r0
 170 ashlsi3_28:
 171         shll2   r0
 172 ashlsi3_26:
 173         shll2   r0
 174 ashlsi3_24:
 175         shll16  r0
 176         rts
 177         shll8   r0
 178
 179 ashlsi3_31:
 180         shll2   r0
 181 ashlsi3_29:
 182         shll2   r0
 183 ashlsi3_27:
 184         shll2   r0
 185 ashlsi3_25:
 186         shll16  r0
 187         shll8   r0
 188         rts
 189         shll    r0
 190
 191 ashlsi3_0:
 192         rts
 193         nop