dnl HP-PA 2.0 mpn_lshift -- Left shift.
dnl Copyright 1997, 2000, 2002, 2003 Free Software Foundation,
Inc.
dnl
This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software
; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General
Public License as published by the Free
dnl Software Foundation
; either version 3 of the License, or (at your
dnl
option) any later
version.
dnl
dnl
or
dnl
dnl * the GNU General
Public License as published by the Free Software
dnl Foundation
; either version 2 of the License, or (at your option) any
dnl later
version.
dnl
dnl
or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY
; without even the implied warranty of MERCHANTABILITY
dnl
or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General
Public License
dnl
for more details.
dnl
dnl You should have received copies of the GNU General
Public License
and the
dnl GNU Lesser General
Public License along with the GNU MP Library.
If not,
dnl see
https://www.gnu.org/licenses/.
dnl
This runs at 1.5 cycles/limb on PA8000
and 1.0 cycles/limb on PA8500.
include(`../config.m4
')
dnl INPUT PARAMETERS
define(`rp
',`%r26')
define(`up
',`%r25')
define(`n
',`%r24')
define(`cnt
',`%r23')
ifdef(`HAVE_ABI_2_0w
',
` .level 2.0w
',` .level 2.0
')
PROLOGUE(mpn_lshift)
shladd n, 3, up, up
shladd n, 3, rp, rp
subi 64, cnt, cnt
mtsar cnt
ldd -8(up), %r21
addib,= -1, n, L(
end)
shrpd %r0, %r21, %sar, %r29 C compute
carry out limb
depw,z n, 31, 3, %r28 C r28 = (size & 7)
sub %r0, n, %r22
depw,z %r22, 28, 3, %r22 C r22 = 8 * (-size & 7)
add up, %r22, up C offset up
blr %r28, %r0 C branch into jump table
add rp, %r22, rp C offset rp
b L(0)
nop
b L(1)
copy %r21, %r20
b L(2)
nop
b L(3)
copy %r21, %r20
b L(4)
nop
b L(5)
copy %r21, %r20
b L(6)
nop
b L(7)
copy %r21, %r20
LDEF(loop)
LDEF(0) ldd -16(up), %r20
shrpd %r21, %r20, %sar, %r21
std %r21, -8(rp)
LDEF(7) ldd -24(up), %r21
shrpd %r20, %r21, %sar, %r20
std %r20, -16(rp)
LDEF(6) ldd -32(up), %r20
shrpd %r21, %r20, %sar, %r21
std %r21, -24(rp)
LDEF(5) ldd -40(up), %r21
shrpd %r20, %r21, %sar, %r20
std %r20, -32(rp)
LDEF(4) ldd -48(up), %r20
shrpd %r21, %r20, %sar, %r21
std %r21, -40(rp)
LDEF(3) ldd -56(up), %r21
shrpd %r20, %r21, %sar, %r20
std %r20, -48(rp)
LDEF(2) ldd -64(up), %r20
shrpd %r21, %r20, %sar, %r21
std %r21, -56(rp)
LDEF(1) ldd -72(up), %r21
ldo -64(up), up
shrpd %r20, %r21, %sar, %r20
std %r20, -64(rp)
addib,> -8, n, L(loop)
ldo -64(rp), rp
LDEF(
end)
shrpd %r21, %r0, %sar, %r21
std %r21, -8(rp)
bve (%r2)
ifdef(`HAVE_ABI_2_0w
',
` copy %r29,%r28
',` extrd,u %r29, 31, 32, %r28
')
EPILOGUE(mpn_lshift)
