ref: 7593588eb1c7e786b62c5f21c081a4bfb1d00d4f
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" %include "vpx_dsp/x86/bitdepth_conversion_sse2.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 .loop: LOAD_TRAN_LOW 2, uqcq, 0 LOAD_TRAN_LOW 0, dqcq, 0 LOAD_TRAN_LOW 3, uqcq, 8 LOAD_TRAN_LOW 1, dqcq, 8 INCREMENT_ELEMENTS_TRAN_LOW uqcq, 16 INCREMENT_ELEMENTS_TRAN_LOW dqcq, 16 sub sizeq, 16 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 ; the sum of 2 31bit integers will fit in a 32bit unsigned integer paddd m0, m1 paddd m2, m3 ; accumulate in 64bit punpckldq m7, m0, m5 punpckhdq m0, m5 paddq m4, m7 punpckldq m7, m2, m5 paddq m4, m0 punpckhdq m2, m5 paddq m6, m7 paddq m6, m2 jg .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 tran_low_t vectors. ; Vectors are converted (if necessary) to int16_t for calculations. ; int64_t vp9_block_error_fp(tran_low_t *coeff, tran_low_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 .loop: LOAD_TRAN_LOW 2, uqcq, 0 LOAD_TRAN_LOW 0, dqcq, 0 LOAD_TRAN_LOW 3, uqcq, 8 LOAD_TRAN_LOW 1, dqcq, 8 INCREMENT_ELEMENTS_TRAN_LOW uqcq, 16 INCREMENT_ELEMENTS_TRAN_LOW dqcq, 16 sub sizeq, 16 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 ; the sum of 2 31bit integers will fit in a 32bit unsigned integer paddd m0, m1 ; accumulate in 64bit punpckldq m3, m0, m5 punpckhdq m0, m5 paddq m4, m3 paddq m4, m0 jnz .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