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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
94 lines
2.2 KiB
NASM
94 lines
2.2 KiB
NASM
dnl ARM64 mpn_copyd.
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dnl Copyright 2013 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 Cortex-A53 ?
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C Cortex-A57 ?
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changecom(@&*$)
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define(`rp', `x0')
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define(`up', `x1')
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define(`n', `x2')
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ASM_START()
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PROLOGUE(mpn_copyd)
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add rp, rp, n, lsl #3
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add up, up, n, lsl #3
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cmp n, #3
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b.le L(bc)
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C Copy until rp is 128-bit aligned
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tbz rp, #3, L(al2)
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sub up, up, #8
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ld1 {v22.1d}, [up]
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sub n, n, #1
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sub rp, rp, #8
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st1 {v22.1d}, [rp]
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L(al2): sub up, up, #16
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ld1 {v26.2d}, [up]
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subs n, n, #6
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sub rp, rp, #16 C offset rp for loop
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b.lt L(end)
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sub up, up, #16 C offset up for loop
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mov x12, #-16
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ALIGN(16)
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L(top): ld1 {v22.2d}, [up], x12
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st1 {v26.2d}, [rp], x12
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ld1 {v26.2d}, [up], x12
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st1 {v22.2d}, [rp], x12
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subs n, n, #4
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b.ge L(top)
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add up, up, #16 C undo up offset
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L(end): st1 {v26.2d}, [rp]
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C Copy last 0-3 limbs. Note that rp is aligned after loop, but not when we
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C arrive here via L(bc)
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L(bc): tbz n, #1, L(tl1)
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sub up, up, #16
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ld1 {v22.2d}, [up]
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sub rp, rp, #16
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st1 {v22.2d}, [rp]
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L(tl1): tbz n, #0, L(tl2)
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sub up, up, #8
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ld1 {v22.1d}, [up]
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sub rp, rp, #8
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st1 {v22.1d}, [rp]
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L(tl2): ret
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EPILOGUE()
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