glibc/sysdeps/hppa/hppa1.1/udiv_qrnnd.s

; HP-PA  __udiv_qrnnd division support, used from longlong.h.
; This version runs fast on PA 7000 and later.

; Copyright (C) 1993, 1994 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 Library General Public License as published by
; the Free Software Foundation; either version 2 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 Library General Public
; License for more details.

; You should have received a copy of the GNU Library General Public License
; along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
; MA 02111-1307, USA.


; INPUT PARAMETERS
; rem_ptr	gr26
; n1		gr25
; n0		gr24
; d		gr23

	.code
L$0000	.word		0x43f00000
	.word		0x0
	.export		__udiv_qrnnd
__udiv_qrnnd
	.proc
	.callinfo	frame=64,no_calls
	.entry
	ldo		64(%r30),%r30

	stws		%r25,-16(0,%r30)	; n_hi
	stws		%r24,-12(0,%r30)	; n_lo
	ldil		L'L$0000,%r19
	ldo		R'L$0000(%r19),%r19
	fldds		-16(0,%r30),%fr5
	stws		%r23,-12(0,%r30)
	comib,<=	0,%r25,L$1
	fcnvxf,dbl,dbl	%fr5,%fr5
	fldds		0(0,%r19),%fr4
	fadd,dbl	%fr4,%fr5,%fr5
L$1
	fcpy,sgl	%fr0,%fr6L
	fldws		-12(0,%r30),%fr6R
	fcnvxf,dbl,dbl	%fr6,%fr4

	fdiv,dbl	%fr5,%fr4,%fr5

	fcnvfx,dbl,dbl	%fr5,%fr4
	fstws		%fr4R,-16(%r30)
	xmpyu		%fr4R,%fr6R,%fr6
	ldws		-16(%r30),%r28
	fstds		%fr6,-16(0,%r30)
	ldws		-12(0,%r30),%r21
	ldws		-16(0,%r30),%r20
	sub		%r24,%r21,%r22
	subb		%r25,%r20,%r19
	comib,=		0,%r19,L$2
	ldo		-64(%r30),%r30

	add		%r22,%r23,%r22
	ldo		-1(%r28),%r28
L$2	bv		0(%r2)
	stws		%r22,0(0,%r26)

	.exit
	.procend