vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
71 lines
1.9 KiB
NASM
71 lines
1.9 KiB
NASM
dnl ARM v8a mpn_gcd_11.
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dnl Based on the K7 gcd_1.asm, by Kevin Ryde. Rehacked for ARM by Torbjorn
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dnl Granlund.
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dnl Copyright 2000-2002, 2005, 2009, 2011-2013 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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changecom(blah)
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C cycles/bit (approx)
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C Cortex-A35 ?
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C Cortex-A53 ?
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C Cortex-A55 ?
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C Cortex-A57 ?
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C Cortex-A72 ?
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C Cortex-A73 ?
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C Cortex-A75 ?
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C Cortex-A76 ?
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C Cortex-A77 ?
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C Numbers measured with: speed -CD -s16-64 -t48 mpn_gcd_1
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define(`u0', `x0')
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define(`v0', `x1')
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ASM_START()
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TEXT
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ALIGN(16)
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PROLOGUE(mpn_gcd_11)
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subs x3, u0, v0 C 0
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b.eq L(end) C
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ALIGN(16)
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L(top): rbit x12, x3 C 1,5
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clz x12, x12 C 2
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csneg x3, x3, x3, cs C v = abs(u-v), even 1
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csel u0, v0, u0, cs C u = min(u,v) 1
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lsr v0, x3, x12 C 3
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subs x3, u0, v0 C 4
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b.ne L(top) C
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L(end): ret
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EPILOGUE()
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