数学计算

开发平台：
Unix_Linux

addmul_3.asm：源码内容
							dnl  Alpha ev6 nails mpn_addmul_3.
dnl  Copyright 2002, 2006 Free Software Foundation, Inc.
dnl
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
dnl  modify it under the terms of the GNU Lesser General Public License as
dnl  published by the Free Software Foundation; either version 3 of the
dnl  License, or (at your option) any later version.
dnl
dnl  The GNU MP Library is distributed in the hope that it will be useful,
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dnl  Lesser General Public License for more details.
dnl
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include(`../config.m4')
C Runs at 3.0 cycles/limb.
C With 2-way unrolling, we could probably reach 2.25 c/l (3.33 i/c).
C  INPUT PARAMETERS
define(`rp',`r16')
define(`up',`r17')
define(`n',`r18')
define(`vp',`r19')
C  Useful register aliases
define(`numb_mask',`r24')
define(`ulimb',`r25')
define(`rlimb',`r27')
define(`m0a',`r0')
define(`m0b',`r1')
define(`m1a',`r2')
define(`m1b',`r3')
define(`m2a',`r20')
define(`m2b',`r21')
define(`acc0',`r4')
define(`acc1',`r5')
define(`acc2',`r22')
define(`v0',`r6')
define(`v1',`r7')
define(`v2',`r23')
C Used for temps: r8 r19 r28
define(`NAIL_BITS',`GMP_NAIL_BITS')
define(`NUMB_BITS',`GMP_NUMB_BITS')
C  This declaration is munged by configure
NAILS_SUPPORT(3-63)
ASM_START()
PROLOGUE(mpn_addmul_3)
	lda	numb_mask,-1(r31)
	srl	numb_mask,NAIL_BITS,numb_mask
	ldq	v0,	0(vp)
	ldq	v1,	8(vp)
	ldq	v2,	16(vp)
	bis	r31,	r31,	acc0		C	zero acc0
	sll	v0,NAIL_BITS,	v0
	bis	r31,	r31,	acc1		C	zero acc1
	sll	v1,NAIL_BITS,	v1
	bis	r31,	r31,	acc2		C	zero acc2
	sll	v2,NAIL_BITS,	v2
	bis	r31,	r31,	r19
	ldq	ulimb,	0(up)
	lda	up,	8(up)
	mulq	v0,	ulimb,	m0a		C U1
	umulh	v0,	ulimb,	m0b		C U1
	mulq	v1,	ulimb,	m1a		C U1
	umulh	v1,	ulimb,	m1b		C U1
	lda	n,	-1(n)
	mulq	v2,	ulimb,	m2a		C U1
	umulh	v2,	ulimb,	m2b		C U1
	beq	n,	L(end)			C U0
	ALIGN(16)
L(top):	ldq	rlimb,	0(rp)			C L1
	ldq	ulimb,	0(up)			C L0
	bis	r31,	r31,	r31		C U0	nop
	addq	r19,	acc0,	acc0		C U1	propagate nail
	lda	rp,	8(rp)			C L1
	srl	m0a,NAIL_BITS,	r8		C U0
	lda	up,	8(up)			C L0
	mulq	v0,	ulimb,	m0a		C U1
	addq	r8,	acc0,	r19		C U0
	addq	m0b,	acc1,	acc0		C L1
	umulh	v0,	ulimb,	m0b		C U1
	bis	r31,	r31,	r31		C L0	nop
	addq	rlimb,	r19,	r19		C L1
	srl	m1a,NAIL_BITS,	r8		C U0
	bis	r31,	r31,	r31		C L0	nop
	mulq	v1,	ulimb,	m1a		C U1
	addq	r8,	acc0,	acc0		C U0
	addq	m1b,	acc2,	acc1		C L1
	umulh	v1,	ulimb,	m1b		C U1
	and	r19,numb_mask,	r28		C L0	extract numb part
	bis	r31,	r31,	r31		C L1	nop
	srl	m2a,NAIL_BITS,	r8		C U0
	lda	n,	-1(n)			C L0
	mulq	v2,	ulimb,	m2a		C U1
	addq	r8,	acc1,	acc1		C L0
	bis	r31,	m2b,	acc2		C L1
	umulh	v2,	ulimb,	m2b		C U1
	srl	r19,NUMB_BITS,	r19		C U0	extract nail part
	stq	r28,	-8(rp)			C L
	bne	n,	L(top)			C U0
L(end):	ldq	rlimb,	0(rp)
	addq	r19,	acc0,	acc0		C	propagate nail
	lda	rp,	8(rp)
	srl	m0a,NAIL_BITS,	r8		C U0
	addq	r8,	acc0,	r19
	addq	m0b,	acc1,	acc0
	addq	rlimb,	r19,	r19
	srl	m1a,NAIL_BITS,	r8		C U0
	addq	r8,	acc0,	acc0
	addq	m1b,	acc2,	acc1
	and	r19,numb_mask,	r28		C extract limb
	srl	m2a,NAIL_BITS,	r8		C U0
	addq	r8,	acc1,	acc1
	bis	r31,	m2b,	acc2
	srl	r19,NUMB_BITS,	r19		C extract nail
	stq	r28,	-8(rp)
	addq	r19,	acc0,	acc0		C propagate nail
	and	acc0,numb_mask,	r28
	stq	r28,	0(rp)
	srl	acc0,NUMB_BITS,	r19
	addq	r19,	acc1,	acc1
	and	acc1,numb_mask,	r28
	stq	r28,	8(rp)
	srl	acc1,NUMB_BITS,	r19
	addq	r19,	acc2,	m0a
	ret	r31,	(r26),	1
EPILOGUE()
ASM_END()

						