LXR linux/arch/arm64/lib/tishift.S

   1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2 *
   3 * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
   4 */
   5
   6#include <linux/linkage.h>
   7
   8#include <asm/assembler.h>
   9
  10ENTRY(__ashlti3)
  11        cbz     x2, 1f
  12        mov     x3, #64
  13        sub     x3, x3, x2
  14        cmp     x3, #0
  15        b.le    2f
  16        lsl     x1, x1, x2
  17        lsr     x3, x0, x3
  18        lsl     x2, x0, x2
  19        orr     x1, x1, x3
  20        mov     x0, x2
  211:
  22        ret
  232:
  24        neg     w1, w3
  25        mov     x2, #0
  26        lsl     x1, x0, x1
  27        mov     x0, x2
  28        ret
  29ENDPROC(__ashlti3)
  30EXPORT_SYMBOL(__ashlti3)
  31
  32ENTRY(__ashrti3)
  33        cbz     x2, 1f
  34        mov     x3, #64
  35        sub     x3, x3, x2
  36        cmp     x3, #0
  37        b.le    2f
  38        lsr     x0, x0, x2
  39        lsl     x3, x1, x3
  40        asr     x2, x1, x2
  41        orr     x0, x0, x3
  42        mov     x1, x2
  431:
  44        ret
  452:
  46        neg     w0, w3
  47        asr     x2, x1, #63
  48        asr     x0, x1, x0
  49        mov     x1, x2
  50        ret
  51ENDPROC(__ashrti3)
  52EXPORT_SYMBOL(__ashrti3)
  53
  54ENTRY(__lshrti3)
  55        cbz     x2, 1f
  56        mov     x3, #64
  57        sub     x3, x3, x2
  58        cmp     x3, #0
  59        b.le    2f
  60        lsr     x0, x0, x2
  61        lsl     x3, x1, x3
  62        lsr     x2, x1, x2
  63        orr     x0, x0, x3
  64        mov     x1, x2
  651:
  66        ret
  672:
  68        neg     w0, w3
  69        mov     x2, #0
  70        lsr     x0, x1, x0
  71        mov     x1, x2
  72        ret
  73ENDPROC(__lshrti3)
  74EXPORT_SYMBOL(__lshrti3)
  75