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! Z8000 __mpn_mul_1 -- Multiply a limb vector with a limb and store
! the result in a second limb vector.
! Copyright (C) 1993, 1994, 1995 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., 675 Mass Ave, Cambridge, MA 02139, USA.
! INPUT PARAMETERS
! res_ptr r7
! s1_ptr r6
! size r5
! s2_limb r4
unseg
.text
even
global ___mpn_mul_1
___mpn_mul_1:
sub r2,r2 ! zero carry limb
and r4,r4
jr mi,Lneg
Lpos: pop r1,@r6
ld r9,r1
mult rr8,r4
and r1,r1 ! shift msb of loaded limb into cy
jr mi,Lp ! branch if loaded limb's msb is set
add r8,r4 ! hi_limb += sign_comp2
Lp: add r9,r2 ! lo_limb += cy_limb
xor r2,r2
adc r2,r8
ld @r7,r9
inc r7,#2
dec r5
jr ne,Lpos
ret t
Lneg: pop r1,@r6
ld r9,r1
mult rr8,r4
add r8,r1 ! hi_limb += sign_comp1
and r1,r1
jr mi,Ln
add r8,r4 ! hi_limb += sign_comp2
Ln: add r9,r2 ! lo_limb += cy_limb
xor r2,r2
adc r2,r8
ld @r7,r9
inc r7,#2
dec r5
jr ne,Lneg
ret t
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