mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-21 10:20:06 +00:00
97 lines
2.2 KiB
ArmAsm
97 lines
2.2 KiB
ArmAsm
|
/* SPARC v9 __mpn_lshift --
|
||
|
|
|
||
|
|
Copyright (C) 1996 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 Library General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 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 Library General Public
|
||
|
|
License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public License
|
||
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
||
|
|
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
|
||
|
|
MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
/* INPUT PARAMETERS
|
||
|
|
res_ptr %i0
|
||
|
|
src_ptr %i1
|
||
|
|
size %i2
|
||
|
|
cnt %i3 */
|
||
|
|
|
||
|
|
ENTRY(__mpn_lshift)
|
||
|
|
save %sp, -128, %sp
|
||
|
|
|
||
|
|
sllx %i2,3,%g1
|
||
|
|
add %i1,%g1,%i1 ! make %i1 point at end of src
|
||
|
|
ldx [%i1-8],%g2 ! load first limb
|
||
|
|
sub %g0,%i3,%i5 ! negate shift count
|
||
|
|
add %i0,%g1,%i0 ! make %i0 point at end of res
|
||
|
|
add %i2,-1,%i2
|
||
|
|
and %i2,4-1,%l4 ! number of limbs in first loop
|
||
|
|
srlx %g2,%i5,%g1 ! compute function result
|
||
|
|
brz,pn %l4,.L0 ! if multiple of 4 limbs, skip first loop
|
||
|
|
mov %g1,%l1
|
||
|
|
|
||
|
|
sub %i2,%l4,%i2 ! adjust count for main loop
|
||
|
|
|
||
|
|
.Loop0: ldx [%i1-16],%g3
|
||
|
|
add %i0,-8,%i0
|
||
|
|
add %i1,-8,%i1
|
||
|
|
add %l4,-1,%l4
|
||
|
|
sllx %g2,%i3,%i4
|
||
|
|
srlx %g3,%i5,%g1
|
||
|
|
mov %g3,%g2
|
||
|
|
or %i4,%g1,%i4
|
||
|
|
brnz,pt %l4,.Loop0
|
||
|
|
stx %i4,[%i0+0]
|
||
|
|
|
||
|
|
.L0: brz,pn %i2,.Lend
|
||
|
|
nop
|
||
|
|
|
||
|
|
.Loop: ldx [%i1-16],%g3
|
||
|
|
add %i0,-32,%i0
|
||
|
|
add %i2,-4,%i2
|
||
|
|
sllx %g2,%i3,%i4
|
||
|
|
srlx %g3,%i5,%g1
|
||
|
|
|
||
|
|
ldx [%i1-24],%g2
|
||
|
|
sllx %g3,%i3,%l4
|
||
|
|
or %i4,%g1,%i4
|
||
|
|
stx %i4,[%i0+24]
|
||
|
|
srlx %g2,%i5,%g1
|
||
|
|
|
||
|
|
ldx [%i1-32],%g3
|
||
|
|
sllx %g2,%i3,%i4
|
||
|
|
or %l4,%g1,%l4
|
||
|
|
stx %l4,[%i0+16]
|
||
|
|
srlx %g3,%i5,%g1
|
||
|
|
|
||
|
|
ldx [%i1-40],%g2
|
||
|
|
sllx %g3,%i3,%l4
|
||
|
|
or %i4,%g1,%i4
|
||
|
|
stx %i4,[%i0+8]
|
||
|
|
srlx %g2,%i5,%g1
|
||
|
|
|
||
|
|
add %i1,-32,%i1
|
||
|
|
or %l4,%g1,%l4
|
||
|
|
brnz,pt %i2,.Loop
|
||
|
|
stx %l4,[%i0+0]
|
||
|
|
|
||
|
|
.Lend: sllx %g2,%i3,%g2
|
||
|
|
stx %g2,[%i0-8]
|
||
|
|
|
||
|
|
mov %l1,%i0
|
||
|
|
jmpl %i7+8, %g0
|
||
|
|
restore
|
||
|
|
|
||
|
|
END(__mpn_lshift)
|