;! HP-PA-1.1 __mpn_addmul_1 -- Multiply a limb vector with a limb and

;! add the result to a second limb vector.

;! Copyright (C) 1992-2018 Free Software Foundation, Inc.

;! This file is part of the GNU MP Library.

;! The GNU MP Library is free software; you can redistribute it and/or modify

;! it under the terms of the GNU Lesser General Public License as published by

;! the Free Software Foundation; either version 2.1 of the License, or (at your

;! option) any later version.

;! The GNU MP Library 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 Lesser General Public

;! License for more details.

;! You should have received a copy of the GNU Lesser General Public License

;! along with the GNU MP Library.  If not, see

;! <http://www.gnu.org/licenses/>.

;! INPUT PARAMETERS

;! res_ptr	r26

;! s1_ptr	r25

;! size		r24

;! s2_limb	r23

;! This runs at 11 cycles/limb on a PA7000.  With the used instructions, it

;! can not become faster due to data cache contention after a store.  On the

;! PA7100 it runs at 10 cycles/limb, and that can not be improved either,

;! since only the xmpyu does not need the integer pipeline, so the only

;! dual-issue we will get are addc+xmpyu.  Unrolling could gain a cycle/limb

;! on the PA7100.

;! There are some ideas described in mul_1.s that applies to this code too.

	.text

	.export		__mpn_addmul_1

__mpn_addmul_1:

	.proc

	.callinfo	frame=64,no_calls

	.entry

	ldo		64(%r30),%r30

	fldws,ma	4(%r25),%fr5

	stw		%r23,-16(%r30)		;! move s2_limb ...

	addib,=		-1,%r24,L$just_one_limb

	 fldws		-16(%r30),%fr4		;! ... into fr4

	add		%r0,%r0,%r0		;! clear carry

	xmpyu		%fr4,%fr5,%fr6

	fldws,ma	4(%r25),%fr7

	fstds		%fr6,-16(%r30)

	xmpyu		%fr4,%fr7,%fr8

	ldw		-12(%r30),%r20		;! least significant limb in product

	ldw		-16(%r30),%r28

	fstds		%fr8,-16(%r30)

	addib,=		-1,%r24,L$end

	 ldw		-12(%r30),%r1

;! Main loop

L$loop:

	ldws		0(%r26),%r29

	fldws,ma	4(%r25),%fr5

	add		%r29,%r20,%r20

	stws,ma		%r20,4(%r26)

	addc		%r28,%r1,%r20

	xmpyu		%fr4,%fr5,%fr6

	ldw		-16(%r30),%r28

	fstds		%fr6,-16(%r30)

	addc		%r0,%r28,%r28

	addib,<>	-1,%r24,L$loop

	 ldw		-12(%r30),%r1

L$end:

	ldw		0(%r26),%r29

	add		%r29,%r20,%r20

	stws,ma		%r20,4(%r26)

	addc		%r28,%r1,%r20

	ldw		-16(%r30),%r28

	ldws		0(%r26),%r29

	addc		%r0,%r28,%r28

	add		%r29,%r20,%r20

	stws,ma		%r20,4(%r26)

	addc		%r0,%r28,%r28

	bv		0(%r2)

	ldo		-64(%r30),%r30

L$just_one_limb:

	xmpyu		%fr4,%fr5,%fr6

	ldw		0(%r26),%r29

	fstds		%fr6,-16(%r30)

	ldw		-12(%r30),%r1

	ldw		-16(%r30),%r28

	add		%r29,%r1,%r20

	stw		%r20,0(%r26)

	addc		%r0,%r28,%r28

	bv		0(%r2)

	 ldo		-64(%r30),%r30

	.exit

	.procend