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! SPARC v9 32-bit __mpn_mul_1 -- Multiply a limb vector with a single
! limb and store the product in a second limb vector.
!
! Copyright (C) 2013-2025 Free Software Foundation, Inc.
! This file is part of the GNU C Library.
!
! 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 %o0
#define s1_ptr %o1
#define sz %o2
#define s2_limb %o3
#define carry %o5
#define tmp1 %g1
#define tmp2 %g2
#define tmp3 %g3
#define tmp4 %o4
ENTRY(__mpn_mul_1)
srl sz, 0, sz
srl s2_limb, 0, s2_limb
subcc sz, 1, sz
be,pn %icc, .Lfinal_limb
clr carry
.Lloop:
lduw [s1_ptr + 0x00], tmp1
lduw [s1_ptr + 0x04], tmp2
mulx tmp1, s2_limb, tmp3
add s1_ptr, 8, s1_ptr
mulx tmp2, s2_limb, tmp4
sub sz, 2, sz
add res_ptr, 8, res_ptr
add carry, tmp3, tmp3
stw tmp3, [res_ptr - 0x08]
srlx tmp3, 32, carry
add carry, tmp4, tmp4
stw tmp4, [res_ptr - 0x04]
brgz sz, .Lloop
srlx tmp4, 32, carry
brlz,pt sz, .Lfinish
nop
.Lfinal_limb:
lduw [s1_ptr + 0x00], tmp1
mulx tmp1, s2_limb, tmp3
add carry, tmp3, tmp3
stw tmp3, [res_ptr + 0x00]
srlx tmp3, 32, carry
.Lfinish:
retl
mov carry, %o0
END(__mpn_mul_1)
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