ref: 70092af5c0195a4537c777ec0ff2bf0b07a7f9cc
dir: /vp9/encoder/x86/vp9_variance_impl_sse2.asm/
;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "vpx_ports/x86_abi_support.asm"
;unsigned int vp9_get_mb_ss_sse2
;(
; short *src_ptr
;)
global sym(vp9_get_mb_ss_sse2) PRIVATE
sym(vp9_get_mb_ss_sse2):
push rbp
mov rbp, rsp
SHADOW_ARGS_TO_STACK 1
GET_GOT rbx
push rsi
push rdi
sub rsp, 16
; end prolog
mov rax, arg(0) ;[src_ptr]
mov rcx, 8
pxor xmm4, xmm4
.NEXTROW:
movdqa xmm0, [rax]
movdqa xmm1, [rax+16]
movdqa xmm2, [rax+32]
movdqa xmm3, [rax+48]
pmaddwd xmm0, xmm0
pmaddwd xmm1, xmm1
pmaddwd xmm2, xmm2
pmaddwd xmm3, xmm3
paddd xmm0, xmm1
paddd xmm2, xmm3
paddd xmm4, xmm0
paddd xmm4, xmm2
add rax, 0x40
dec rcx
ja .NEXTROW
movdqa xmm3,xmm4
psrldq xmm4,8
paddd xmm4,xmm3
movdqa xmm3,xmm4
psrldq xmm4,4
paddd xmm4,xmm3
movq rax,xmm4
; begin epilog
add rsp, 16
pop rdi
pop rsi
RESTORE_GOT
UNSHADOW_ARGS
pop rbp
ret