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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
2.1 KiB
NASM
94 lines
2.1 KiB
NASM
dnl AMD64 mpn_copyd -- copy limb vector, decrementing.
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dnl Copyright 2003, 2005, 2007, 2011, 2012 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 AMD K8,K9 1
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C AMD K10 1
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C AMD bd1 1.36
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C AMD bobcat 1.71
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C Intel P4 2-3
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C Intel core2 1
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C Intel NHM 1
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C Intel SBR 1
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C Intel atom 2
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C VIA nano 2
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IFSTD(`define(`rp',`%rdi')')
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IFSTD(`define(`up',`%rsi')')
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IFSTD(`define(`n', `%rdx')')
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IFDOS(`define(`rp',`%rcx')')
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IFDOS(`define(`up',`%rdx')')
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IFDOS(`define(`n', `%r8')')
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ABI_SUPPORT(DOS64)
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ABI_SUPPORT(STD64)
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ASM_START()
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TEXT
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ALIGN(64)
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PROLOGUE(mpn_copyd)
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lea -8(up,n,8), up
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lea (rp,n,8), rp
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sub $4, n
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jc L(end)
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nop
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L(top): mov (up), %rax
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mov -8(up), %r9
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lea -32(rp), rp
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mov -16(up), %r10
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mov -24(up), %r11
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lea -32(up), up
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mov %rax, 24(rp)
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mov %r9, 16(rp)
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sub $4, n
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mov %r10, 8(rp)
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mov %r11, (rp)
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jnc L(top)
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L(end): shr R32(n)
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jnc 1f
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mov (up), %rax
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mov %rax, -8(rp)
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lea -8(rp), rp
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lea -8(up), up
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1: shr R32(n)
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jnc 1f
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mov (up), %rax
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mov -8(up), %r9
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mov %rax, -8(rp)
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mov %r9, -16(rp)
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1: ret
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EPILOGUE()
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