arch/sh/lib/ashlsi3.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 ! GLOBAL(ashlsi3)
  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         .global __ashlsi3
  36         .align  2
  37 __ashlsi3:
  38         mov     #31,r0
  39         and     r0,r5
  40         mova    __ashlsi3_table,r0
  41         mov.b   @(r0,r5),r5
  42 #ifdef __sh1__
  43         add     r5,r0
  44         jmp     @r0
  45 #else
  46         braf    r5
  47 #endif
  48         mov     r4,r0
  49
  50         .align  2
  51 __ashlsi3_table:
  52         .byte           __ashlsi3_0-__ashlsi3_table
  53         .byte           __ashlsi3_1-__ashlsi3_table
  54         .byte           __ashlsi3_2-__ashlsi3_table
  55         .byte           __ashlsi3_3-__ashlsi3_table
  56         .byte           __ashlsi3_4-__ashlsi3_table
  57         .byte           __ashlsi3_5-__ashlsi3_table
  58         .byte           __ashlsi3_6-__ashlsi3_table
  59         .byte           __ashlsi3_7-__ashlsi3_table
  60         .byte           __ashlsi3_8-__ashlsi3_table
  61         .byte           __ashlsi3_9-__ashlsi3_table
  62         .byte           __ashlsi3_10-__ashlsi3_table
  63         .byte           __ashlsi3_11-__ashlsi3_table
  64         .byte           __ashlsi3_12-__ashlsi3_table
  65         .byte           __ashlsi3_13-__ashlsi3_table
  66         .byte           __ashlsi3_14-__ashlsi3_table
  67         .byte           __ashlsi3_15-__ashlsi3_table
  68         .byte           __ashlsi3_16-__ashlsi3_table
  69         .byte           __ashlsi3_17-__ashlsi3_table
  70         .byte           __ashlsi3_18-__ashlsi3_table
  71         .byte           __ashlsi3_19-__ashlsi3_table
  72         .byte           __ashlsi3_20-__ashlsi3_table
  73         .byte           __ashlsi3_21-__ashlsi3_table
  74         .byte           __ashlsi3_22-__ashlsi3_table
  75         .byte           __ashlsi3_23-__ashlsi3_table
  76         .byte           __ashlsi3_24-__ashlsi3_table
  77         .byte           __ashlsi3_25-__ashlsi3_table
  78         .byte           __ashlsi3_26-__ashlsi3_table
  79         .byte           __ashlsi3_27-__ashlsi3_table
  80         .byte           __ashlsi3_28-__ashlsi3_table
  81         .byte           __ashlsi3_29-__ashlsi3_table
  82         .byte           __ashlsi3_30-__ashlsi3_table
  83         .byte           __ashlsi3_31-__ashlsi3_table
  84
  85 __ashlsi3_6:
  86         shll2   r0
  87 __ashlsi3_4:
  88         shll2   r0
  89 __ashlsi3_2:
  90         rts
  91         shll2   r0
  92
  93 __ashlsi3_7:
  94         shll2   r0
  95 __ashlsi3_5:
  96         shll2   r0
  97 __ashlsi3_3:
  98         shll2   r0
  99 __ashlsi3_1:
 100         rts
 101         shll    r0
 102
 103 __ashlsi3_14:
 104         shll2   r0
 105 __ashlsi3_12:
 106         shll2   r0
 107 __ashlsi3_10:
 108         shll2   r0
 109 __ashlsi3_8:
 110         rts
 111         shll8   r0
 112
 113 __ashlsi3_15:
 114         shll2   r0
 115 __ashlsi3_13:
 116         shll2   r0
 117 __ashlsi3_11:
 118         shll2   r0
 119 __ashlsi3_9:
 120         shll8   r0
 121         rts
 122         shll    r0
 123
 124 __ashlsi3_22:
 125         shll2   r0
 126 __ashlsi3_20:
 127         shll2   r0
 128 __ashlsi3_18:
 129         shll2   r0
 130 __ashlsi3_16:
 131         rts
 132         shll16  r0
 133
 134 __ashlsi3_23:
 135         shll2   r0
 136 __ashlsi3_21:
 137         shll2   r0
 138 __ashlsi3_19:
 139         shll2   r0
 140 __ashlsi3_17:
 141         shll16  r0
 142         rts
 143         shll    r0
 144
 145 __ashlsi3_30:
 146         shll2   r0
 147 __ashlsi3_28:
 148         shll2   r0
 149 __ashlsi3_26:
 150         shll2   r0
 151 __ashlsi3_24:
 152         shll16  r0
 153         rts
 154         shll8   r0
 155
 156 __ashlsi3_31:
 157         shll2   r0
 158 __ashlsi3_29:
 159         shll2   r0
 160 __ashlsi3_27:
 161         shll2   r0
 162 __ashlsi3_25:
 163         shll16  r0
 164         shll8   r0
 165         rts
 166         shll    r0
 167
 168 __ashlsi3_0:
 169         rts
 170         nop