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dnl VAX mpn_submul_1 -- Multiply a limb vector with a limb and subtract the
dnl result from a second limb vector.
dnl Copyright 1992, 1994, 1996, 2000, 2012 Free Software Foundation, Inc.
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 modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
ASM_START()
PROLOGUE(mpn_submul_1)
.word 0xfc0
movl 12(ap), r4
movl 8(ap), r8
movl 4(ap), r9
clrl r3
incl r4
ashl $-1, r4, r7
clrl r11
movl 16(ap), r6
jlss L(v0_big)
jlbc r4, L(1)
C Loop for v0 < 0x80000000
L(tp1): movl (r8)+, r1
jlss L(1n0)
emul r1, r6, $0, r2
addl2 r11, r2
adwc $0, r3
subl2 r2, (r9)+
adwc $0, r3
L(1): movl (r8)+, r1
jlss L(1n1)
L(1p1): emul r1, r6, $0, r10
addl2 r3, r10
adwc $0, r11
subl2 r10, (r9)+
adwc $0, r11
sobgtr r7, L(tp1)
movl r11, r0
ret
L(1n0): emul r1, r6, $0, r2
addl2 r11, r2
adwc r6, r3
subl2 r2, (r9)+
adwc $0, r3
movl (r8)+, r1
jgeq L(1p1)
L(1n1): emul r1, r6, $0, r10
addl2 r3, r10
adwc r6, r11
subl2 r10, (r9)+
adwc $0, r11
sobgtr r7, L(tp1)
movl r11, r0
ret
L(v0_big):
jlbc r4, L(2)
C Loop for v0 >= 0x80000000
L(tp2): movl (r8)+, r1
jlss L(2n0)
emul r1, r6, $0, r2
addl2 r11, r2
adwc r1, r3
subl2 r2, (r9)+
adwc $0, r3
L(2): movl (r8)+, r1
jlss L(2n1)
L(2p1): emul r1, r6, $0, r10
addl2 r3, r10
adwc r1, r11
subl2 r10, (r9)+
adwc $0, r11
sobgtr r7, L(tp2)
movl r11, r0
ret
L(2n0): emul r1, r6, $0, r2
addl2 r11, r2
adwc r6, r3
subl2 r2, (r9)+
adwc r1, r3
movl (r8)+, r1
jgeq L(2p1)
L(2n1): emul r1, r6, $0, r10
addl2 r3, r10
adwc r6, r11
subl2 r10, (r9)+
adwc r1, r11
sobgtr r7, L(tp2)
movl r11, r0
ret
EPILOGUE()
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