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  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 !! libgcc routines for the Renesas / SuperH SH CPUs.
   9 !! Contributed by Steve Chamberlain.
  10 !! sac@cygnus.com
  11
  12 !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
  13 !! recoded in assembly by Toshiyasu Morita
  14 !! tm@netcom.com
  15
  16 /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
  17    ELF local label prefixes by J"orn Rennecke
  18    amylaar@cygnus.com  */
  19
  20 !
  21 ! __ashrsi3
  22 !
  23 ! Entry:
  24 !
  25 ! r4: Value to shift
  26 ! r5: Shifts
  27 !
  28 ! Exit:
  29 !
  30 ! r0: Result
  31 !
  32 ! Destroys:
  33 !
  34 ! (none)
  35 !
  36
  37         .global __ashrsi3
  38
  39         .align  2
  40 __ashrsi3:
  41         mov     #31,r0
  42         and     r0,r5
  43         mova    ashrsi3_table,r0
  44         mov.b   @(r0,r5),r5
  45 #ifdef __sh1__
  46         add     r5,r0
  47         jmp     @r0
  48 #else
  49         braf    r5
  50 #endif
  51         mov     r4,r0
  52
  53         .align  2
  54 ashrsi3_table:
  55         .byte           ashrsi3_0-ashrsi3_table
  56         .byte           ashrsi3_1-ashrsi3_table
  57         .byte           ashrsi3_2-ashrsi3_table
  58         .byte           ashrsi3_3-ashrsi3_table
  59         .byte           ashrsi3_4-ashrsi3_table
  60         .byte           ashrsi3_5-ashrsi3_table
  61         .byte           ashrsi3_6-ashrsi3_table
  62         .byte           ashrsi3_7-ashrsi3_table
  63         .byte           ashrsi3_8-ashrsi3_table
  64         .byte           ashrsi3_9-ashrsi3_table
  65         .byte           ashrsi3_10-ashrsi3_table
  66         .byte           ashrsi3_11-ashrsi3_table
  67         .byte           ashrsi3_12-ashrsi3_table
  68         .byte           ashrsi3_13-ashrsi3_table
  69         .byte           ashrsi3_14-ashrsi3_table
  70         .byte           ashrsi3_15-ashrsi3_table
  71         .byte           ashrsi3_16-ashrsi3_table
  72         .byte           ashrsi3_17-ashrsi3_table
  73         .byte           ashrsi3_18-ashrsi3_table
  74         .byte           ashrsi3_19-ashrsi3_table
  75         .byte           ashrsi3_20-ashrsi3_table
  76         .byte           ashrsi3_21-ashrsi3_table
  77         .byte           ashrsi3_22-ashrsi3_table
  78         .byte           ashrsi3_23-ashrsi3_table
  79         .byte           ashrsi3_24-ashrsi3_table
  80         .byte           ashrsi3_25-ashrsi3_table
  81         .byte           ashrsi3_26-ashrsi3_table
  82         .byte           ashrsi3_27-ashrsi3_table
  83         .byte           ashrsi3_28-ashrsi3_table
  84         .byte           ashrsi3_29-ashrsi3_table
  85         .byte           ashrsi3_30-ashrsi3_table
  86         .byte           ashrsi3_31-ashrsi3_table
  87
  88 ashrsi3_31:
  89         rotcl   r0
  90         rts
  91         subc    r0,r0
  92
  93 ashrsi3_30:
  94         shar    r0
  95 ashrsi3_29:
  96         shar    r0
  97 ashrsi3_28:
  98         shar    r0
  99 ashrsi3_27:
 100         shar    r0
 101 ashrsi3_26:
 102         shar    r0
 103 ashrsi3_25:
 104         shar    r0
 105 ashrsi3_24:
 106         shlr16  r0
 107         shlr8   r0
 108         rts
 109         exts.b  r0,r0
 110
 111 ashrsi3_23:
 112         shar    r0
 113 ashrsi3_22:
 114         shar    r0
 115 ashrsi3_21:
 116         shar    r0
 117 ashrsi3_20:
 118         shar    r0
 119 ashrsi3_19:
 120         shar    r0
 121 ashrsi3_18:
 122         shar    r0
 123 ashrsi3_17:
 124         shar    r0
 125 ashrsi3_16:
 126         shlr16  r0
 127         rts
 128         exts.w  r0,r0
 129
 130 ashrsi3_15:
 131         shar    r0
 132 ashrsi3_14:
 133         shar    r0
 134 ashrsi3_13:
 135         shar    r0
 136 ashrsi3_12:
 137         shar    r0
 138 ashrsi3_11:
 139         shar    r0
 140 ashrsi3_10:
 141         shar    r0
 142 ashrsi3_9:
 143         shar    r0
 144 ashrsi3_8:
 145         shar    r0
 146 ashrsi3_7:
 147         shar    r0
 148 ashrsi3_6:
 149         shar    r0
 150 ashrsi3_5:
 151         shar    r0
 152 ashrsi3_4:
 153         shar    r0
 154 ashrsi3_3:
 155         shar    r0
 156 ashrsi3_2:
 157         shar    r0
 158 ashrsi3_1:
 159         rts
 160         shar    r0
 161
 162 ashrsi3_0:
 163         rts
 164         nop