mpir/mpn/x86_64w/bobcat/hamdist.asm

75 lines
2.0 KiB
NASM

;
; Copyright 2008 Jason Moxham
;
; Windows Conversion Copyright 2008 Brian Gladman
;
; This file is part of the MPIR Library.
; The MPIR Library is free software; you can redistribute it and/or modify
; it under the terms of the GNU Lesser General Public License as published
; by the Free Software Foundation; either version 2.1 of the License, or (at
; your option) any later version.
; The MPIR Library is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
; License for more details.
; You should have received a copy of the GNU Lesser General Public License
; along with the MPIR Library; see the file COPYING.LIB. If not, write
; to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
; Boston, MA 02110-1301, USA.
; mp_limb_t mpn_hamdist(mp_ptr, mp_ptr, mp_size_t)
; rax rdi, rdx, rdx
; rax rcx, rdx, r8
%include "yasm_mac.inc"
CPU SSE4.2
BITS 64
FRAME_PROC mpn_hamdist, 0, rdi
xor eax, eax
lea rdi, [rcx+r8*8-24]
lea rdx, [rdx+r8*8-24]
mov rcx, 3
sub rcx, r8
jnc .1
xalign 16
.0: mov r8, [rdi+rcx*8]
mov r9, [rdi+rcx*8+8]
xor r8, [rdx+rcx*8]
mov r10, [rdi+rcx*8+16]
popcnt r8, r8
xor r9, [rdx+rcx*8+8]
xor r10, [rdx+rcx*8+16]
popcnt r9, r9
mov r11, [rdi+rcx*8+24]
add rax, r8
popcnt r10, r10
xor r11, [rdx+rcx*8+24]
add rax, r9
popcnt r11, r11
add rax, r10
add rax, r11
add rcx, 4
jnc .0
.1:
cmp rcx, 2
ja .5
je .4
jp .3
.2: mov r8, [rdi]
xor r8, [rdx]
popcnt r8, r8
add rax, r8
.3: mov r8, [rdi+8]
xor r8, [rdx+8]
popcnt r8, r8
add rax, r8
.4: mov r8, [rdi+16]
xor r8, [rdx+16]
popcnt r8, r8
add rax, r8
.5: END_PROC rdi
end