54 lines
1.6 KiB
NASM
54 lines
1.6 KiB
NASM
; PROLOGUE(hamdist)
|
|
|
|
; AMD64 mpn_hamdist
|
|
; Copyright 2009 Jason Moxham
|
|
; 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 verdxon 2.1 of the License, or (at
|
|
; your option) any later verdxon.
|
|
; 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, rsi, rdx
|
|
; rax rcx, rdx, r8
|
|
|
|
%include 'yasm_mac.inc'
|
|
|
|
CPU nehalem
|
|
BITS 64
|
|
|
|
LEAF_PROC mpn_hamdist
|
|
lea rdx, [rdx+r8*8-8]
|
|
lea r9, [rcx+r8*8-8]
|
|
mov rcx, 1
|
|
xor eax, eax
|
|
sub rcx, r8
|
|
jnc .1
|
|
xalign 16
|
|
.0: mov r10, [r9+rcx*8]
|
|
xor r10, [rdx+rcx*8]
|
|
popcnt r10, r10
|
|
mov r11, [r9+rcx*8+8]
|
|
xor r11, [rdx+rcx*8+8]
|
|
popcnt r11, r11
|
|
add rax, r10
|
|
add rax, r11
|
|
add rcx, 2
|
|
jnc .0
|
|
.1: jne .2
|
|
mov r10, [r9+rcx*8]
|
|
xor r10, [rdx+rcx*8]
|
|
popcnt r10, r10
|
|
add rax, r10
|
|
.2: ret
|
|
|
|
end
|