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kernel/linux-rt-4.4.41/arch/c6x/lib/llshr.S 1.25 KB
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  ;;  Copyright (C) 2010 Texas Instruments Incorporated
  ;;  Contributed by Mark Salter <msalter@redhat.com>.
  ;;
  ;; This program is free software; you can redistribute it and/or modify
  ;; it under the terms of the GNU General Public License as published by
  ;; the Free Software Foundation; either version 2 of the License, or
  ;; (at your option) any later version.
  ;;
  ;; This program is distributed in the hope that it will be useful,
  ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  ;; GNU General Public License for more details.
  ;;
  ;; You should have received a copy of the GNU General Public License
  ;; along with this program; if not, write to the Free Software
  ;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  
  ;;  uint64_t __c6xabi_llshr(uint64_t val, uint shift)
  
  #include <linux/linkage.h>
  
  	.text
  ENTRY(__c6xabi_llshr)
  	 mv	.l1x	B4,A1
     [!A1] b	.s2	B3		; return if zero shift count
  	 mvk	.s1	32,A0
  	 sub	.d1	A0,A1,A0
  	 cmplt	.l1	0,A0,A2
     [A2]  shl	.s1	A5,A0,A0
  	 nop
     [!A2] neg	.l1	A0,A4
  || [A2]  shru	.s1	A4,A1,A4
     [!A2] shr	.s1	A5,A4,A4
  || [A2]  or	.d1	A4,A0,A4
     [!A2] shr	.s1	A5,0x1f,A5
     [A2]  shr	.s1	A5,A1,A5
  	 bnop	.s2	B3,5
  ENDPROC(__c6xabi_llshr)