ref: e6501296834cdcfd1f7efb59eeed5562fc93c30e
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. ; %define private_prefix vp9 %include "third_party/x86inc/x86inc.asm" SECTION .text ; int64_t vp9_block_error(int16_t *coeff, int16_t *dqcoeff, intptr_t block_size, ; int64_t *ssz) INIT_XMM sse2 cglobal block_error, 3, 3, 8, uqc, dqc, size, ssz pxor m4, m4 ; sse accumulator pxor m6, m6 ; ssz accumulator pxor m5, m5 ; dedicated zero register lea uqcq, [uqcq+sizeq*2] lea dqcq, [dqcq+sizeq*2] neg sizeq .loop: mova m2, [uqcq+sizeq*2] mova m0, [dqcq+sizeq*2] mova m3, [uqcq+sizeq*2+mmsize] mova m1, [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 pmaddwd m2, m2 pmaddwd m3, m3 ; accumulate in 64bit punpckldq m7, m0, m5 punpckhdq m0, m5 paddq m4, m7 punpckldq m7, m1, m5 paddq m4, m0 punpckhdq m1, m5 paddq m4, m7 punpckldq m7, m2, m5 paddq m4, m1 punpckhdq m2, m5 paddq m6, m7 punpckldq m7, m3, m5 paddq m6, m2 punpckhdq m3, m5 paddq m6, m7 paddq m6, m3 add sizeq, mmsize jl .loop ; accumulate horizontally and store in return value movhlps m5, m4 movhlps m7, m6 paddq m4, m5 paddq m6, m7 %if ARCH_X86_64 movq rax, m4 movq [sszq], m6 %else mov eax, sszm pshufd m5, m4, 0x1 movq [eax], m6 movd eax, m4 movd edx, m5 %endif RET ; Compute the sum of squared difference between two int16_t vectors. ; int64_t vp9_block_error_fp(int16_t *coeff, int16_t *dqcoeff, ; intptr_t block_size) INIT_XMM sse2 cglobal block_error_fp, 3, 3, 6, uqc, dqc, size pxor m4, m4 ; sse accumulator pxor m5, m5 ; dedicated zero register lea uqcq, [uqcq+sizeq*2] lea dqcq, [dqcq+sizeq*2] neg sizeq .loop: mova m2, [uqcq+sizeq*2] mova m0, [dqcq+sizeq*2] mova m3, [uqcq+sizeq*2+mmsize] mova m1, [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 m3, m0, m5 punpckhdq m0, m5 paddq m4, m3 punpckldq m3, m1, m5 paddq m4, m0 punpckhdq m1, m5 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