[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / metag / lib / muldi3.S

! Copyright (C) 2012 by Imagination Technologies Ltd.
!
! 64-bit multiply routine.
!

!
! 64-bit signed/unsigned multiply
!
! A = D1Ar1:D0Ar2 = a 2^48 + b 2^32 +  c 2^16 + d 2^0
!
! B = D1Ar3:D0Ar4 = w 2^48 + x 2^32 +  y 2^16 + z 2^0
!
	.text
	.global ___muldi3
	.type   ___muldi3,function

___muldi3:
	MULD    D1Re0,D1Ar1,D0Ar4       ! (a 2^48 + b 2^32)(y 2^16 + z 2^0)
	MULD    D0Re0,D0Ar2,D1Ar3       ! (w 2^48 + x 2^32)(c 2^16 + d 2^0)
	ADD     D1Re0,D1Re0,D0Re0

	MULW    D0Re0,D0Ar2,D0Ar4       ! (d 2^0)  * (z 2^0)

	RTDW    D0Ar2,D0Ar2
	MULW    D0Ar6,D0Ar2,D0Ar4       ! (c 2^16)(z 2^0)
	LSR     D1Ar5,D0Ar6,#16
	LSL     D0Ar6,D0Ar6,#16
	ADDS    D0Re0,D0Re0,D0Ar6
	ADDCS   D1Re0,D1Re0,#1
	RTDW    D0Ar4,D0Ar4
	ADD     D1Re0,D1Re0,D1Ar5

	MULW    D0Ar6,D0Ar2,D0Ar4       ! (c 2^16)(y 2^16)
	ADD     D1Re0,D1Re0,D0Ar6

	RTDW    D0Ar2,D0Ar2
	MULW    D0Ar6,D0Ar2,D0Ar4       ! (d 2^0)(y 2^16)
	LSR     D1Ar5,D0Ar6,#16
	LSL     D0Ar6,D0Ar6,#16
	ADDS    D0Re0,D0Re0,D0Ar6
	ADD     D1Re0,D1Re0,D1Ar5
	ADDCS   D1Re0,D1Re0,#1
	MOV     PC, D1RtP
	.size ___muldi3,.-___muldi3
Commit	Line	Data
086e9dc0 JH	1	! Copyright (C) 2012 by Imagination Technologies Ltd.
	2	!
	3	! 64-bit multiply routine.
	4	!
	5
	6	!
	7	! 64-bit signed/unsigned multiply
	8	!
	9	! A = D1Ar1:D0Ar2 = a 2^48 + b 2^32 + c 2^16 + d 2^0
	10	!
	11	! B = D1Ar3:D0Ar4 = w 2^48 + x 2^32 + y 2^16 + z 2^0
	12	!
	13	.text
	14	.global ___muldi3
	15	.type ___muldi3,function
	16
	17	___muldi3:
	18	MULD D1Re0,D1Ar1,D0Ar4 ! (a 2^48 + b 2^32)(y 2^16 + z 2^0)
	19	MULD D0Re0,D0Ar2,D1Ar3 ! (w 2^48 + x 2^32)(c 2^16 + d 2^0)
	20	ADD D1Re0,D1Re0,D0Re0
	21
	22	MULW D0Re0,D0Ar2,D0Ar4 ! (d 2^0) * (z 2^0)
	23
	24	RTDW D0Ar2,D0Ar2
	25	MULW D0Ar6,D0Ar2,D0Ar4 ! (c 2^16)(z 2^0)
	26	LSR D1Ar5,D0Ar6,#16
	27	LSL D0Ar6,D0Ar6,#16
	28	ADDS D0Re0,D0Re0,D0Ar6
	29	ADDCS D1Re0,D1Re0,#1
	30	RTDW D0Ar4,D0Ar4
	31	ADD D1Re0,D1Re0,D1Ar5
	32
	33	MULW D0Ar6,D0Ar2,D0Ar4 ! (c 2^16)(y 2^16)
	34	ADD D1Re0,D1Re0,D0Ar6
	35
	36	RTDW D0Ar2,D0Ar2
	37	MULW D0Ar6,D0Ar2,D0Ar4 ! (d 2^0)(y 2^16)
	38	LSR D1Ar5,D0Ar6,#16
	39	LSL D0Ar6,D0Ar6,#16
	40	ADDS D0Re0,D0Re0,D0Ar6
	41	ADD D1Re0,D1Re0,D1Ar5
	42	ADDCS D1Re0,D1Re0,#1
	43	MOV PC, D1RtP
	44	.size ___muldi3,.-___muldi3