dnl  HP-PA mpn_sub_n -- Subtract two limb vectors of the same length > 0 and

dnl  store difference in a third limb vector.

dnl  Copyright 1992, 1994, 2000-2002 Free Software Foundation, Inc.

dnl  This file is part of the GNU MP Library.

dnl

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

dnl  it under the terms of either:

dnl

dnl    * the GNU Lesser General Public License as published by the Free

dnl      Software Foundation; either version 3 of the License, or (at your

dnl      option) any later version.

dnl

dnl  or

dnl

dnl    * the GNU General Public License as published by the Free Software

dnl      Foundation; either version 2 of the License, or (at your option) any

dnl      later version.

dnl

dnl  or both in parallel, as here.

dnl

dnl  The GNU MP Library is distributed in the hope that it will be useful, but

dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

dnl  for more details.

dnl

dnl  You should have received copies of the GNU General Public License and the

dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,

dnl  see https://www.gnu.org/licenses/.

include(`../config.m4')

C INPUT PARAMETERS

C res_ptr	gr26

C s1_ptr	gr25

C s2_ptr	gr24

C size		gr23

C One might want to unroll this as for other processors, but it turns out that

C the data cache contention after a store makes such unrolling useless.  We

C can't come under 5 cycles/limb anyway.

ASM_START()

PROLOGUE(mpn_sub_n)

	ldws,ma		4(0,%r25),%r20

	ldws,ma		4(0,%r24),%r19

	addib,=		-1,%r23,L(end)	C check for (SIZE == 1)

	 sub		%r20,%r19,%r28	C subtract first limbs ignoring cy

LDEF(loop)

	ldws,ma		4(0,%r25),%r20

	ldws,ma		4(0,%r24),%r19

	stws,ma		%r28,4(0,%r26)

	addib,<>	-1,%r23,L(loop)

	 subb		%r20,%r19,%r28

LDEF(end)

	stws		%r28,0(0,%r26)

	addc		%r0,%r0,%r28

	bv		0(%r2)

	 subi		1,%r28,%r28

EPILOGUE()