arch/sh/lib/ashrsi3.S

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   3    2004, 2005, 2006
   4    Free Software Foundation, Inc.
   5  */
   6
   7 !! libgcc routines for the Renesas / SuperH SH CPUs.
   8 !! Contributed by Steve Chamberlain.
   9 !! sac@cygnus.com
  10
  11 !! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
  12 !! recoded in assembly by Toshiyasu Morita
  13 !! tm@netcom.com
  14
  15 /* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
  16    ELF local label prefixes by J"orn Rennecke
  17    amylaar@cygnus.com  */
  18
  19 !
  20 ! __ashrsi3
  21 !
  22 ! Entry:
  23 !
  24 ! r4: Value to shift
  25 ! r5: Shifts
  26 !
  27 ! Exit:
  28 !
  29 ! r0: Result
  30 !
  31 ! Destroys:
  32 !
  33 ! (none)
  34 !
  35
  36         .global __ashrsi3
  37
  38         .align  2
  39 __ashrsi3:
  40         mov     #31,r0
  41         and     r0,r5
  42         mova    ashrsi3_table,r0
  43         mov.b   @(r0,r5),r5
  44 #ifdef __sh1__
  45         add     r5,r0
  46         jmp     @r0
  47 #else
  48         braf    r5
  49 #endif
  50         mov     r4,r0
  51
  52         .align  2
  53 ashrsi3_table:
  54         .byte           ashrsi3_0-ashrsi3_table
  55         .byte           ashrsi3_1-ashrsi3_table
  56         .byte           ashrsi3_2-ashrsi3_table
  57         .byte           ashrsi3_3-ashrsi3_table
  58         .byte           ashrsi3_4-ashrsi3_table
  59         .byte           ashrsi3_5-ashrsi3_table
  60         .byte           ashrsi3_6-ashrsi3_table
  61         .byte           ashrsi3_7-ashrsi3_table
  62         .byte           ashrsi3_8-ashrsi3_table
  63         .byte           ashrsi3_9-ashrsi3_table
  64         .byte           ashrsi3_10-ashrsi3_table
  65         .byte           ashrsi3_11-ashrsi3_table
  66         .byte           ashrsi3_12-ashrsi3_table
  67         .byte           ashrsi3_13-ashrsi3_table
  68         .byte           ashrsi3_14-ashrsi3_table
  69         .byte           ashrsi3_15-ashrsi3_table
  70         .byte           ashrsi3_16-ashrsi3_table
  71         .byte           ashrsi3_17-ashrsi3_table
  72         .byte           ashrsi3_18-ashrsi3_table
  73         .byte           ashrsi3_19-ashrsi3_table
  74         .byte           ashrsi3_20-ashrsi3_table
  75         .byte           ashrsi3_21-ashrsi3_table
  76         .byte           ashrsi3_22-ashrsi3_table
  77         .byte           ashrsi3_23-ashrsi3_table
  78         .byte           ashrsi3_24-ashrsi3_table
  79         .byte           ashrsi3_25-ashrsi3_table
  80         .byte           ashrsi3_26-ashrsi3_table
  81         .byte           ashrsi3_27-ashrsi3_table
  82         .byte           ashrsi3_28-ashrsi3_table
  83         .byte           ashrsi3_29-ashrsi3_table
  84         .byte           ashrsi3_30-ashrsi3_table
  85         .byte           ashrsi3_31-ashrsi3_table
  86
  87 ashrsi3_31:
  88         rotcl   r0
  89         rts
  90         subc    r0,r0
  91
  92 ashrsi3_30:
  93         shar    r0
  94 ashrsi3_29:
  95         shar    r0
  96 ashrsi3_28:
  97         shar    r0
  98 ashrsi3_27:
  99         shar    r0
 100 ashrsi3_26:
 101         shar    r0
 102 ashrsi3_25:
 103         shar    r0
 104 ashrsi3_24:
 105         shlr16  r0
 106         shlr8   r0
 107         rts
 108         exts.b  r0,r0
 109
 110 ashrsi3_23:
 111         shar    r0
 112 ashrsi3_22:
 113         shar    r0
 114 ashrsi3_21:
 115         shar    r0
 116 ashrsi3_20:
 117         shar    r0
 118 ashrsi3_19:
 119         shar    r0
 120 ashrsi3_18:
 121         shar    r0
 122 ashrsi3_17:
 123         shar    r0
 124 ashrsi3_16:
 125         shlr16  r0
 126         rts
 127         exts.w  r0,r0
 128
 129 ashrsi3_15:
 130         shar    r0
 131 ashrsi3_14:
 132         shar    r0
 133 ashrsi3_13:
 134         shar    r0
 135 ashrsi3_12:
 136         shar    r0
 137 ashrsi3_11:
 138         shar    r0
 139 ashrsi3_10:
 140         shar    r0
 141 ashrsi3_9:
 142         shar    r0
 143 ashrsi3_8:
 144         shar    r0
 145 ashrsi3_7:
 146         shar    r0
 147 ashrsi3_6:
 148         shar    r0
 149 ashrsi3_5:
 150         shar    r0
 151 ashrsi3_4:
 152         shar    r0
 153 ashrsi3_3:
 154         shar    r0
 155 ashrsi3_2:
 156         shar    r0
 157 ashrsi3_1:
 158         rts
 159         shar    r0
 160
 161 ashrsi3_0:
 162         rts
 163         nop