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dnl S/390-64 mpn_sec_tabselect
dnl Copyright 2021 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/.
include(`../config.m4')
C cycles/limb
C z900 ?
C z990 ?
C z9 ?
C z10 ?
C z196 ?
C z13 ?
C z14 ?
C z15 ?
dnl void
dnl mpn_sec_tabselect (volatile mp_limb_t *rp, volatile const mp_limb_t *tab,
dnl mp_size_t n, mp_size_t nents, mp_size_t which)
define(`rp', `%r2')
define(`tp', `%r3')
define(`n', `%r4')
define(`nents', `%r5')
define(`which_arg',`%r6') C magicked to stack
dnl r0 r1 r2 r3 r4 r5 r6 r7
dnl r8 r9 r10 r11 r12 r13 r14 r15
define(`mask', `%r14')
define(`k', `%r1')
define(`which', `%r0')
define(`FRAME', 32)
ASM_START()
PROLOGUE(mpn_sec_tabselect)
stm %r5, %r15, 20(%r15)
ahi %r15, -FRAME
sll n, 2
msr %r5, n
st %r5, 16(%r15) C nents * n * LIMB_BYTES
lr %r5, n
srl %r5, 2+2
nr %r5, %r5
je L(end4)
L(outer):
l which, eval(24+FRAME)(%r15)
l k, eval(20+FRAME)(%r15) C nents
lhi %r6, 0
lhi %r7, 0
lhi %r8, 0
lhi %r9, 0
L(tp4): lhi mask, 1
slr which, mask
slbr mask, mask
lm %r10, %r13, 0(tp)
nr %r10, mask
nr %r11, mask
nr %r12, mask
nr %r13, mask
ar %r6, %r10
ar %r7, %r11
ar %r8, %r12
ar %r9, %r13
ar tp, n
brct k, L(tp4)
stm %r6, %r9, 0(rp)
ahi rp, 16
sl tp, 16(%r15)
ahi tp, eval(4*4)
brct %r5, L(outer)
L(end4):
tmll n, 8
je L(end2)
l which, eval(24+FRAME)(%r15)
l k, eval(20+FRAME)(%r15) C nents
lhi %r6, 0
lhi %r7, 0
L(tp2): lhi mask, 1
slr which, mask
slbr mask, mask
lm %r10, %r11, 0(tp)
nr %r10, mask
nr %r11, mask
ar %r6, %r10
ar %r7, %r11
ar tp, n
brct k, L(tp2)
stm %r6, %r7, 0(rp)
ahi rp, 8
sl tp, 16(%r15)
ahi tp, eval(2*4)
L(end2):
tmll n, 4
je L(end1)
l which, eval(24+FRAME)(%r15)
l k, eval(20+FRAME)(%r15) C nents
lhi %r6, 0
L(tp1): lhi mask, 1
slr which, mask
slbr mask, mask
l %r10, 0(tp)
nr %r10, mask
ar %r6, %r10
ar tp, n
brct k, L(tp1)
st %r6, 0(rp)
L(end1):
lm %r5, %r15, eval(20+FRAME)(%r15)
br %r14
EPILOGUE()
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