96 lines
2.1 KiB
ArmAsm
96 lines
2.1 KiB
ArmAsm
/* SPARC v9 __mpn_lshift --
|
|
|
|
Copyright (C) 1996-2022 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* INPUT PARAMETERS
|
|
res_ptr %o0
|
|
src_ptr %o1
|
|
size %o2
|
|
cnt %o3 */
|
|
|
|
.register %g2, #scratch
|
|
.register %g3, #scratch
|
|
|
|
ENTRY(__mpn_lshift)
|
|
sllx %o2,3,%g1
|
|
add %o1,%g1,%o1 ! make %o1 point at end of src
|
|
ldx [%o1-8],%g2 ! load first limb
|
|
sub %g0,%o3,%o5 ! negate shift count
|
|
add %o0,%g1,%o0 ! make %o0 point at end of res
|
|
add %o2,-1,%o2
|
|
andcc %o2,4-1,%g4 ! number of limbs in first loop
|
|
srlx %g2,%o5,%g1 ! compute function result
|
|
be,pn %xcc,.L0 ! if multiple of 4 limbs, skip first loop
|
|
mov %g1,%g5
|
|
|
|
sub %o2,%g4,%o2 ! adjust count for main loop
|
|
|
|
.Loop0: ldx [%o1-16],%g3
|
|
add %o0,-8,%o0
|
|
add %o1,-8,%o1
|
|
sllx %g2,%o3,%o4
|
|
addcc %g4,-1,%g4
|
|
srlx %g3,%o5,%g1
|
|
mov %g3,%g2
|
|
or %o4,%g1,%o4
|
|
bne,pt %xcc,.Loop0
|
|
stx %o4,[%o0+0]
|
|
|
|
.L0: brz,pn %o2,.Lend
|
|
nop
|
|
|
|
.Loop: ldx [%o1-16],%g3
|
|
add %o0,-32,%o0
|
|
sllx %g2,%o3,%o4
|
|
addcc %o2,-4,%o2
|
|
srlx %g3,%o5,%g1
|
|
|
|
ldx [%o1-24],%g2
|
|
sllx %g3,%o3,%g4
|
|
or %o4,%g1,%o4
|
|
stx %o4,[%o0+24]
|
|
srlx %g2,%o5,%g1
|
|
|
|
ldx [%o1-32],%g3
|
|
sllx %g2,%o3,%o4
|
|
or %g4,%g1,%g4
|
|
stx %g4,[%o0+16]
|
|
srlx %g3,%o5,%g1
|
|
|
|
ldx [%o1-40],%g2
|
|
sllx %g3,%o3,%g4
|
|
or %o4,%g1,%o4
|
|
stx %o4,[%o0+8]
|
|
srlx %g2,%o5,%g1
|
|
|
|
add %o1,-32,%o1
|
|
or %g4,%g1,%g4
|
|
bne,pt %xcc,.Loop
|
|
stx %g4,[%o0+0]
|
|
|
|
.Lend: sllx %g2,%o3,%g2
|
|
stx %g2,[%o0-8]
|
|
|
|
jmpl %o7+8, %g0
|
|
mov %g5,%o0
|
|
|
|
END(__mpn_lshift)
|