[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / metag / lib / lshrdi3.S

! Copyright (C) 2012 by Imagination Technologies Ltd.
!
! 64-bit logical shift right routine.
!

	.text
	.global ___lshrdi3
	.type   ___lshrdi3,function

___lshrdi3:
	MOV     D0Re0,D0Ar2
	MOV     D1Re0,D1Ar1
	CMP     D1Ar3,#0                ! COUNT == 0
	MOVEQ   PC,D1RtP                ! Yes, return

	MOV     D0Ar4,D1Ar3
	SUBS    D1Ar3,D1Ar3,#32         ! N = COUNT - 32
	BGE     $L30

!! Shift < 32
	NEG     D1Ar3,D1Ar3             ! N = - N
	LSR     D0Re0,D0Re0,D0Ar4       ! LO = LO >> COUNT
	LSL     D0Ar6,D1Re0,D1Ar3       ! TMP= HI << -(COUNT - 32)
	OR      D0Re0,D0Re0,D0Ar6       ! LO = LO | TMP
	SWAP    D1Ar3,D0Ar4
	LSR     D1Re0,D1Re0,D1Ar3       ! HI = HI >> COUNT
	MOV     PC,D1RtP
$L30:
!! Shift >= 32
	LSR     D0Re0,D1Re0,D1Ar3       ! LO = HI >> N
	MOV     D1Re0,#0                ! HI = 0
	MOV     PC,D1RtP
	.size ___lshrdi3,.-___lshrdi3
Commit	Line	Data
086e9dc0 JH	1	! Copyright (C) 2012 by Imagination Technologies Ltd.
	2	!
	3	! 64-bit logical shift right routine.
	4	!
	5
	6	.text
	7	.global ___lshrdi3
	8	.type ___lshrdi3,function
	9
	10	___lshrdi3:
	11	MOV D0Re0,D0Ar2
	12	MOV D1Re0,D1Ar1
	13	CMP D1Ar3,#0 ! COUNT == 0
	14	MOVEQ PC,D1RtP ! Yes, return
	15
	16	MOV D0Ar4,D1Ar3
	17	SUBS D1Ar3,D1Ar3,#32 ! N = COUNT - 32
	18	BGE $L30
	19
	20	!! Shift < 32
	21	NEG D1Ar3,D1Ar3 ! N = - N
	22	LSR D0Re0,D0Re0,D0Ar4 ! LO = LO >> COUNT
	23	LSL D0Ar6,D1Re0,D1Ar3 ! TMP= HI << -(COUNT - 32)
	24	OR D0Re0,D0Re0,D0Ar6 ! LO = LO \| TMP
	25	SWAP D1Ar3,D0Ar4
	26	LSR D1Re0,D1Re0,D1Ar3 ! HI = HI >> COUNT
	27	MOV PC,D1RtP
	28	$L30:
	29	!! Shift >= 32
	30	LSR D0Re0,D1Re0,D1Ar3 ! LO = HI >> N
	31	MOV D1Re0,#0 ! HI = 0
	32	MOV PC,D1RtP
	33	.size ___lshrdi3,.-___lshrdi3