[linux-2.6-block.git] / arch / metag / lib / ashldi3.S

! SPDX-License-Identifier: GPL-2.0
! Copyright (C) 2012 by Imagination Technologies Ltd.
!
! 64-bit arithmetic shift left routine.
!

	.text
	.global ___ashldi3
	.type   ___ashldi3,function

___ashldi3:
	MOV     D0Re0,D0Ar2
	MOV     D1Re0,D1Ar1
	CMP     D1Ar3,#0                ! COUNT == 0
	MOVEQ   PC,D1RtP                ! Yes, return

	SUBS    D0Ar4,D1Ar3,#32         ! N = COUNT - 32
	BGE     $L10

!! Shift < 32
	NEG     D0Ar4,D0Ar4             ! N = - N
	LSL     D1Re0,D1Re0,D1Ar3       ! HI = HI << COUNT
	LSR     D0Ar6,D0Re0,D0Ar4       ! TMP= LO >> -(COUNT - 32)
	OR      D1Re0,D1Re0,D0Ar6       ! HI = HI | TMP
	SWAP    D0Ar4,D1Ar3
	LSL     D0Re0,D0Re0,D0Ar4       ! LO = LO << COUNT
	MOV     PC,D1RtP

$L10:
!! Shift >= 32
	LSL     D1Re0,D0Re0,D0Ar4       ! HI = LO << N
	MOV     D0Re0,#0                ! LO = 0
	MOV     PC,D1RtP
	.size ___ashldi3,.-___ashldi3
Commit	Line	Data
b2441318	1	! SPDX-License-Identifier: GPL-2.0
086e9dc0 JH	2	! Copyright (C) 2012 by Imagination Technologies Ltd.
	3	!
	4	! 64-bit arithmetic shift left routine.
	5	!
	6
	7	.text
	8	.global ___ashldi3
	9	.type ___ashldi3,function
	10
	11	___ashldi3:
	12	MOV D0Re0,D0Ar2
	13	MOV D1Re0,D1Ar1
	14	CMP D1Ar3,#0 ! COUNT == 0
	15	MOVEQ PC,D1RtP ! Yes, return
	16
	17	SUBS D0Ar4,D1Ar3,#32 ! N = COUNT - 32
	18	BGE $L10
	19
	20	!! Shift < 32
	21	NEG D0Ar4,D0Ar4 ! N = - N
	22	LSL D1Re0,D1Re0,D1Ar3 ! HI = HI << COUNT
	23	LSR D0Ar6,D0Re0,D0Ar4 ! TMP= LO >> -(COUNT - 32)
	24	OR D1Re0,D1Re0,D0Ar6 ! HI = HI \| TMP
	25	SWAP D0Ar4,D1Ar3
	26	LSL D0Re0,D0Re0,D0Ar4 ! LO = LO << COUNT
	27	MOV PC,D1RtP
	28
	29	$L10:
	30	!! Shift >= 32
	31	LSL D1Re0,D0Re0,D0Ar4 ! HI = LO << N
	32	MOV D0Re0,#0 ! LO = 0
	33	MOV PC,D1RtP
	34	.size ___ashldi3,.-___ashldi3