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! sparc __mpn_rshift --
!
! Copyright (C) 1995-2023 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 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 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 Lesser General Public
! License for more details.
!
! You should have received a copy of the GNU Lesser General Public License
! along with the GNU MP Library; see the file COPYING.LIB. If not,
! see <https://www.gnu.org/licenses/>.
! INPUT PARAMETERS
! RES_PTR %o0
! SRC_PTR %o1
! SIZE %o2
! CNT %o3
#include <sysdep.h>
ENTRY(__mpn_rshift)
ld [%o1],%g2 ! load first limb
sub %g0,%o3,%o5 ! negate shift count
add %o2,-1,%o2
andcc %o2,4-1,%g4 ! number of limbs in first loop
sll %g2,%o5,%g1 ! compute function result
be LOC(0) ! if multiple of 4 limbs, skip first loop
st %g1,[%sp+80]
sub %o2,%g4,%o2 ! adjust count for main loop
LOC(loop0):
ld [%o1+4],%g3
add %o0,4,%o0
add %o1,4,%o1
addcc %g4,-1,%g4
srl %g2,%o3,%o4
sll %g3,%o5,%g1
mov %g3,%g2
or %o4,%g1,%o4
bne LOC(loop0)
st %o4,[%o0-4]
LOC(0): tst %o2
be LOC(end)
nop
LOC(loop):
ld [%o1+4],%g3
add %o0,16,%o0
addcc %o2,-4,%o2
srl %g2,%o3,%o4
sll %g3,%o5,%g1
ld [%o1+8],%g2
srl %g3,%o3,%g4
or %o4,%g1,%o4
st %o4,[%o0-16]
sll %g2,%o5,%g1
ld [%o1+12],%g3
srl %g2,%o3,%o4
or %g4,%g1,%g4
st %g4,[%o0-12]
sll %g3,%o5,%g1
ld [%o1+16],%g2
srl %g3,%o3,%g4
or %o4,%g1,%o4
st %o4,[%o0-8]
sll %g2,%o5,%g1
add %o1,16,%o1
or %g4,%g1,%g4
bne LOC(loop)
st %g4,[%o0-4]
LOC(end):
srl %g2,%o3,%g2
st %g2,[%o0-0]
retl
ld [%sp+80],%o0
END(__mpn_rshift)
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