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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)
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