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! SPARC v9 32-bit __mpn_submul_1 -- Multiply a limb vector with a limb
! and subtract the result from a second limb vector.
!
! Copyright (C) 2013-2021 Free Software Foundation, Inc.
! This file is part of the GNU C Library.
! Contributed by David S. Miller <davem@davemloft.net>
!
! The GNU C Library is free software; you can redistribute it and/or
! modify it under the terms of the GNU Lesser General Public
! License as published by the Free Software Foundation; either
! version 2.1 of the License, or (at your option) any later version.
!
! The GNU C 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
! Lesser General Public License for more details.
!
! You should have received a copy of the GNU Lesser General Public
! License along with the GNU C Library; if not, see
! <https://www.gnu.org/licenses/>.
#include <sysdep.h>
#define res_ptr %i0
#define s1_ptr %i1
#define sz_arg %i2
#define s2l_arg %i3
#define sz %o4
#define carry %o5
#define s2_limb %g1
#define tmp1 %l0
#define tmp2 %l1
#define tmp3 %l2
#define tmp4 %l3
#define tmp64_1 %g3
#define tmp64_2 %o3
ENTRY(__mpn_submul_1)
save %sp, -96, %sp
srl sz_arg, 0, sz
srl s2l_arg, 0, s2_limb
subcc sz, 1, sz
be,pn %icc, .Lfinal_limb
subcc %g0, 0, carry
.Lloop:
lduw [s1_ptr + 0x00], tmp1
lduw [res_ptr + 0x00], tmp3
lduw [s1_ptr + 0x04], tmp2
lduw [res_ptr + 0x04], tmp4
mulx tmp1, s2_limb, tmp64_1
add s1_ptr, 8, s1_ptr
mulx tmp2, s2_limb, tmp64_2
sub sz, 2, sz
add res_ptr, 8, res_ptr
addx carry, tmp64_1, tmp64_1
srlx tmp64_1, 32, carry
subcc tmp3, tmp64_1, tmp64_1
stw tmp64_1, [res_ptr - 0x08]
addx carry, tmp64_2, tmp64_2
srlx tmp64_2, 32, carry
subcc tmp4, tmp64_2, tmp64_2
brgz sz, .Lloop
stw tmp64_2, [res_ptr - 0x04]
brlz,pt sz, .Lfinish
nop
.Lfinal_limb:
lduw [s1_ptr + 0x00], tmp1
lduw [res_ptr + 0x00], tmp3
mulx tmp1, s2_limb, tmp64_1
addx carry, tmp64_1, tmp64_1
srlx tmp64_1, 32, carry
subcc tmp3, tmp64_1, tmp64_1
stw tmp64_1, [res_ptr + 0x00]
.Lfinish:
addx carry, 0, carry
jmpl %i7 + 0x8, %g0
restore carry, 0, %o0
END(__mpn_submul_1)
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