ref: 529679bd52640010aabafef6a0b879a4196d3163
dir: /vp9/encoder/x86/vp9_error_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 "third_party/x86inc/x86inc.asm" SECTION .text ; void vp9_block_error(int16_t *coeff, int16_t *dqcoeff, intptr_t block_size) INIT_XMM sse2 cglobal block_error, 3, 3, 6, uqc, dqc, size pxor m4, m4 ; accumulator pxor m5, m5 ; dedicated zero register lea uqcq, [uqcq+sizeq*2] lea dqcq, [dqcq+sizeq*2] neg sizeq .loop: mova m0, [uqcq+sizeq*2] mova m2, [dqcq+sizeq*2] mova m1, [uqcq+sizeq*2+mmsize] mova m3, [dqcq+sizeq*2+mmsize] psubw m0, m2 psubw m1, m3 ; individual errors are max. 15bit+sign, so squares are 30bit, and ; thus the sum of 2 should fit in a 31bit integer (+ unused sign bit) pmaddwd m0, m0 pmaddwd m1, m1 ; accumulate in 64bit punpckldq m2, m0, m5 punpckhdq m0, m5 punpckldq m3, m1, m5 punpckhdq m1, m5 paddq m4, m2 paddq m4, m0 paddq m4, m3 paddq m4, m1 add sizeq, mmsize jl .loop ; accumulate horizontally and store in return value movhlps m5, m4 paddq m4, m5 %if ARCH_X86_64 movq rax, m4 %else pshufd m5, m4, 0x1 movd eax, m4 movd edx, m5 %endif RET