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# VAX __mpn_submul_1 -- Multiply a limb vector with a limb and subtract
# the result from a second limb vector.
# Copyright (C) 1992, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
# INPUT PARAMETERS
# res_ptr (sp + 4)
# s1_ptr (sp + 8)
# size (sp + 12)
# s2_limb (sp + 16)
.text
.align 1
.globl ___mpn_submul_1
___mpn_submul_1:
.word 0xfc0
movl 12(ap),r4
movl 8(ap),r8
movl 4(ap),r9
movl 16(ap),r6
jlss s2_big
clrl r3
incl r4
ashl $-1,r4,r7
jlbc r4,L1
clrl r11
# Loop for S2_LIMB < 0x80000000
Loop1: movl (r8)+,r1
jlss L1n0
emul r1,r6,$0,r2
addl2 r11,r2
adwc $0,r3
subl2 r2,(r9)+
adwc $0,r3
L1: movl (r8)+,r1
jlss L1n1
L1p1: emul r1,r6,$0,r10
addl2 r3,r10
adwc $0,r11
subl2 r10,(r9)+
adwc $0,r11
jsobgtr r7,Loop1
movl r11,r0
ret
L1n0: emul r1,r6,$0,r2
addl2 r11,r2
adwc r6,r3
subl2 r2,(r9)+
adwc $0,r3
movl (r8)+,r1
jgeq L1p1
L1n1: emul r1,r6,$0,r10
addl2 r3,r10
adwc r6,r11
subl2 r10,(r9)+
adwc $0,r11
jsobgtr r7,Loop1
movl r11,r0
ret
s2_big: clrl r3
incl r4
ashl $-1,r4,r7
jlbc r4,L2
clrl r11
# Loop for S2_LIMB >= 0x80000000
Loop2: movl (r8)+,r1
jlss L2n0
emul r1,r6,$0,r2
addl2 r11,r2
adwc r1,r3
subl2 r2,(r9)+
adwc $0,r3
L2: movl (r8)+,r1
jlss L2n1
L2p1: emul r1,r6,$0,r10
addl2 r3,r10
adwc r1,r11
subl2 r10,(r9)+
adwc $0,r11
jsobgtr r7,Loop2
movl r11,r0
ret
L2n0: emul r1,r6,$0,r2
addl2 r11,r2
adwc r6,r3
subl2 r2,(r9)+
adwc r1,r3
movl (r8)+,r1
jgeq L2p1
L2n1: emul r1,r6,$0,r10
addl2 r3,r10
adwc r6,r11
subl2 r10,(r9)+
adwc r1,r11
jsobgtr r7,Loop2
movl r11,r0
ret
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