arch/c6x/lib/llshru.S

   1 ;;  Copyright (C) 2010 Texas Instruments Incorporated
   2 ;;  Contributed by Mark Salter <msalter@redhat.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 ;;  uint64_t __c6xabi_llshru(uint64_t val, uint shift)
  19
  20 #include <linux/linkage.h>
  21
  22         .text
  23 ENTRY(__c6xabi_llshru)
  24          mv     .l1x    B4,A1
  25    [!A1] b      .s2     B3              ; return if zero shift count
  26          mvk    .s1     32,A0
  27          sub    .d1     A0,A1,A0
  28          cmplt  .l1     0,A0,A2
  29    [A2]  shl    .s1     A5,A0,A0
  30          nop
  31    [!A2] neg    .l1     A0,A4
  32 || [A2]  shru   .s1     A4,A1,A4
  33    [!A2] shru   .s1     A5,A4,A4
  34 || [A2]  or     .d1     A4,A0,A4
  35 || [!A2] mvk    .l1     0,A5
  36    [A2]  shru   .s1     A5,A1,A5
  37          bnop   .s2     B3,5
  38 ENDPROC(__c6xabi_llshru)