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/* S390 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
the result to a second limb vector.
Copyright (C) 2000, 2001 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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
res_ptr %r2
s1_ptr %r3
sizeP %r4
s2_limb %r5
*/
#include "sysdep.h"
#include "asm-syntax.h"
.text
ENTRY(__mpn_addmul_1)
st %r6,24(%r15)
slr %r6,%r6 # cy_limb = 0
.L0: icm %r1,15,0(%r3) # get s1_ptr[i]
mr %r0,%r5 # umul_ppmm(prod_high,prod_low,s1_ptr[j],s2_limb)
jnm .L1
alr %r0,%r5
.L1: ltr %r5,%r5
jnm .L2
al %r0,0(%r3)
.L2: alr %r1,%r6 # prod_low += cy_limb
lr %r6,%r0 # cy_limb = prod_high
brc 12,.L3
ahi %r6,1 # + (prod_low < cy_limb)
.L3: al %r1,0(%r2) # prod_low += res_ptr[i]
brc 12,.L4
ahi %r6,1 # cy_limb++
.L4: st %r1,0(%r2)
la %r2,4(0,%r2)
la %r3,4(0,%r3)
brct %r4,.L0
lr %r2,%r6 # return cy_limb
l %r6,24(%r15)
.Lexit: br %r14
END(__mpn_addmul_1)
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