83 lines
2.2 KiB
NASM
83 lines
2.2 KiB
NASM
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; AMD64 mpn_hamdist
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; Version 1.0.4
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;
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; Copyright 2008 Jason Moxham
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;
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; Windows Conversion Copyright 2008 Brian Gladman
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;
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; This file is part of the MPIR Library.
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; The MPIR Library is free software; you can redistribute it and/or modify
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; it under the terms of the GNU Lesser General Public License as published
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; by the Free Software Foundation; either version 2.1 of the License, or (at
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; your option) any later version.
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; The MPIR Library is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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; License for more details.
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; You should have received a copy of the GNU Lesser General Public License
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; along with the MPIR Library; see the file COPYING.LIB. If not, write
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; to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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; Boston, MA 02110-1301, USA.
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;
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; Calling interface:
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;
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; unsigned long __gmpn_hamdist(
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; mp_srcptr sp1, rcx
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; mp_srcptr sp1, rdx
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; mp_size_t n, r8d
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; );
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%include "..\..\yasm_mac.inc"
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CPU Athlon64
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BITS 64
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FRAME_PROC mpn_hamdist, 0, rbx
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mov ebx, r8d
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xor eax, eax
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sub rbx, 4
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jc .2
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xalign 16
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.1: mov r8, [rcx+rbx*8+24]
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mov r9, [rcx+rbx*8+16]
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xor r8, [rdx+rbx*8+24]
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popcnt r8, r8
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add rax, r8
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xor r9, [rdx+rbx*8+16]
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popcnt r9, r9
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add rax, r9
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mov r10, [rcx+rbx*8+8]
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mov r11, [rcx+rbx*8]
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xor r10, [rdx+rbx*8+8]
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popcnt r10, r10
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add rax, r10
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xor r11, [rdx+rbx*8]
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popcnt r11, r11
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add rax, r11
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sub rbx, 4
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jnc .1
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.2: add rbx, 4
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jz .3
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mov r8, [rcx+rbx*8-8]
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xor r8, [rdx+rbx*8-8]
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popcnt r8, r8
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add rax, r8
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dec rbx
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jz .3
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mov r9, [rcx+rbx*8-8]
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xor r9, [rdx+rbx*8-8]
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popcnt r9, r9
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add rax, r9
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dec rbx
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jz .3
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mov r10, [rcx+rbx*8-8]
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xor r10, [rdx+rbx*8-8]
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popcnt r10, r10
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add rax, r10
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.3: END_PROC rbx
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end
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