arch/c6x/lib/strasgi.S

   1 ;;  Copyright 2010  Free Software Foundation, Inc.
   2 ;;  Contributed by Bernd Schmidt <bernds@codesourcery.com>.
   3 ;;
   4 ;; This program is free software; you can redistribute it and/or modify
   5 ;; it under the terms of the GNU General Public License as published by
   6 ;; the Free Software Foundation; either version 2 of the License, or
   7 ;; (at your option) any later version.
   8 ;;
   9 ;; This program is distributed in the hope that it will be useful,
  10 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 ;; GNU General Public License for more details.
  13 ;;
  14 ;; You should have received a copy of the GNU General Public License
  15 ;; along with this program; if not, write to the Free Software
  16 ;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 #include <linux/linkage.h>
  19
  20         .text
  21
  22 ENTRY(__c6xabi_strasgi)
  23         ;; This is essentially memcpy, with alignment known to be at least
  24         ;; 4, and the size a multiple of 4 greater than or equal to 28.
  25          ldw    .d2t1   *B4++, A0
  26 ||       mvk    .s2     16, B1
  27          ldw    .d2t1   *B4++, A1
  28 ||       mvk    .s2     20, B2
  29 ||       sub    .d1     A6, 24, A6
  30          ldw    .d2t1   *B4++, A5
  31          ldw    .d2t1   *B4++, A7
  32 ||       mv     .l2x    A6, B7
  33          ldw    .d2t1   *B4++, A8
  34          ldw    .d2t1   *B4++, A9
  35 ||       mv     .s2x    A0, B5
  36 ||       cmpltu .l2     B2, B7, B0
  37
  38 _strasgi_loop:
  39          stw    .d1t2   B5, *A4++
  40 || [B0]  ldw    .d2t1   *B4++, A0
  41 ||       mv     .s2x    A1, B5
  42 ||       mv     .l2     B7, B6
  43
  44    [B0]  sub    .d2     B6, 24, B7
  45 || [B0]  b      .s2     _strasgi_loop
  46 ||       cmpltu .l2     B1, B6, B0
  47
  48    [B0]  ldw    .d2t1   *B4++, A1
  49 ||       stw    .d1t2   B5, *A4++
  50 ||       mv     .s2x    A5, B5
  51 ||       cmpltu .l2     12, B6, B0
  52
  53    [B0]  ldw    .d2t1   *B4++, A5
  54 ||       stw    .d1t2   B5, *A4++
  55 ||       mv     .s2x    A7, B5
  56 ||       cmpltu .l2     8, B6, B0
  57
  58    [B0]  ldw    .d2t1   *B4++, A7
  59 ||       stw    .d1t2   B5, *A4++
  60 ||       mv     .s2x    A8, B5
  61 ||       cmpltu .l2     4, B6, B0
  62
  63    [B0]  ldw    .d2t1   *B4++, A8
  64 ||       stw    .d1t2   B5, *A4++
  65 ||       mv     .s2x    A9, B5
  66 ||       cmpltu .l2     0, B6, B0
  67
  68    [B0]  ldw    .d2t1   *B4++, A9
  69 ||       stw    .d1t2   B5, *A4++
  70 ||       mv     .s2x    A0, B5
  71 ||       cmpltu .l2     B2, B7, B0
  72
  73         ;; loop back branch happens here
  74
  75          cmpltu .l2     B1, B6, B0
  76 ||       ret    .s2     b3
  77
  78    [B0]  stw    .d1t1   A1, *A4++
  79 ||       cmpltu .l2     12, B6, B0
  80    [B0]  stw    .d1t1   A5, *A4++
  81 ||       cmpltu .l2     8, B6, B0
  82    [B0]  stw    .d1t1   A7, *A4++
  83 ||       cmpltu .l2     4, B6, B0
  84    [B0]  stw    .d1t1   A8, *A4++
  85 ||       cmpltu .l2     0, B6, B0
  86    [B0]  stw    .d1t1   A9, *A4++
  87
  88         ;; return happens here
  89 ENDPROC(__c6xabi_strasgi)