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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
145 lines
3.0 KiB
NASM
145 lines
3.0 KiB
NASM
dnl S/390-64 mpn_copyd
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dnl Copyright 2011 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of either:
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dnl
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dnl * the GNU Lesser General Public License as published by the Free
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dnl Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl or
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dnl
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dnl * the GNU General Public License as published by the Free Software
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dnl Foundation; either version 2 of the License, or (at your option) any
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dnl later version.
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dnl
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dnl or both in parallel, as here.
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dnl
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received copies of the GNU General Public License and the
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dnl GNU Lesser General Public License along with the GNU MP Library. If not,
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dnl see https://www.gnu.org/licenses/.
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include(`../config.m4')
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C cycles/limb
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C z900 2.67
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C z990 1.5
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C z9 ?
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C z10 1.8
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C z196 ?
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C FIXME:
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C * Avoid saving/restoring callee-saves registers for n < 3. This could be
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C done by setting rp=r1, up=r2, i=r0 and r3,r4,r5 for clock regs.
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C We could then use r3...r10 in main loop.
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C * Could we use some EX trick, modifying lmg/stmg, for the feed-in code?
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C INPUT PARAMETERS
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define(`rp_param', `%r2')
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define(`up_param', `%r3')
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define(`n', `%r4')
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define(`rp', `%r8')
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define(`up', `%r9')
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ASM_START()
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PROLOGUE(mpn_copyd)
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stmg %r6, %r11, 48(%r15)
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sllg %r1, n, 3
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la %r10, 8(n)
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aghi %r1, -64
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srlg %r10, %r10, 3
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lghi %r11, -64
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la rp, 0(%r1,rp_param) C FIXME use lay on z990 and later
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la up, 0(%r1,up_param) C FIXME use lay on z990 and later
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lghi %r7, 7
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ngr %r7, n C n mod 8
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cghi %r7, 2
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jh L(b34567)
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cghi %r7, 1
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je L(b1)
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jh L(b2)
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L(b0): brctg %r10, L(top)
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j L(end)
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L(b1): lg %r0, 56(up)
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aghi up, -8
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stg %r0, 56(rp)
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aghi rp, -8
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brctg %r10, L(top)
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j L(end)
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L(b2): lmg %r0, %r1, 48(up)
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aghi up, -16
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stmg %r0, %r1, 48(rp)
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aghi rp, -16
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brctg %r10, L(top)
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j L(end)
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L(b34567):
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cghi %r7, 4
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jl L(b3)
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je L(b4)
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cghi %r7, 6
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je L(b6)
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jh L(b7)
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L(b5): lmg %r0, %r4, 24(up)
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aghi up, -40
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stmg %r0, %r4, 24(rp)
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aghi rp, -40
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brctg %r10, L(top)
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j L(end)
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L(b3): lmg %r0, %r2, 40(up)
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aghi up, -24
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stmg %r0, %r2, 40(rp)
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aghi rp, -24
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brctg %r10, L(top)
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j L(end)
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L(b4): lmg %r0, %r3, 32(up)
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aghi up, -32
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stmg %r0, %r3, 32(rp)
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aghi rp, -32
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brctg %r10, L(top)
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j L(end)
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L(b6): lmg %r0, %r5, 16(up)
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aghi up, -48
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stmg %r0, %r5, 16(rp)
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aghi rp, -48
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brctg %r10, L(top)
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j L(end)
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L(b7): lmg %r0, %r6, 8(up)
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aghi up, -56
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stmg %r0, %r6, 8(rp)
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aghi rp, -56
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brctg %r10, L(top)
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j L(end)
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L(top): lmg %r0, %r7, 0(up)
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la up, 0(%r11,up)
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stmg %r0, %r7, 0(rp)
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la rp, 0(%r11,rp)
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brctg %r10, L(top)
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L(end): lmg %r6, %r11, 48(%r15)
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br %r14
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EPILOGUE()
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