mirror of https://git.ffmpeg.org/ffmpeg.git
236 lines
6.2 KiB
NASM
236 lines
6.2 KiB
NASM
;******************************************************************************
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;* linear least squares model
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;*
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;* Copyright (c) 2013 Loren Merritt
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or
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;* modify it under the terms of the GNU Lesser General Public
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;* License as published by the Free Software Foundation; either
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;* version 2.1 of the License, or (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;* Lesser General Public License for more details.
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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with FFmpeg; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "x86util.asm"
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SECTION .text
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%define MAX_VARS 32
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%define MAX_VARS_ALIGN (MAX_VARS+4)
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%define COVAR_STRIDE MAX_VARS_ALIGN*8
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%define COVAR(x,y) [covarq + (x)*8 + (y)*COVAR_STRIDE]
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struc LLSModel
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.covariance: resq MAX_VARS_ALIGN*MAX_VARS_ALIGN
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.coeff: resq MAX_VARS*MAX_VARS
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.variance: resq MAX_VARS
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.indep_count: resd 1
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endstruc
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%macro ADDPD_MEM 2
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%if cpuflag(avx)
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vaddpd %2, %2, %1
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%else
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addpd %2, %1
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%endif
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mova %1, %2
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%endmacro
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INIT_XMM sse2
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%define movdqa movaps
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cglobal update_lls, 2,5,8, ctx, var, i, j, covar2
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%define covarq ctxq
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mov id, [ctxq + LLSModel.indep_count]
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lea varq, [varq + iq*8]
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neg iq
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mov covar2q, covarq
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.loopi:
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; Compute all 3 pairwise products of a 2x2 block that lies on the diagonal
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mova m1, [varq + iq*8]
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mova m3, [varq + iq*8 + 16]
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pshufd m4, m1, q1010
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pshufd m5, m1, q3232
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pshufd m6, m3, q1010
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pshufd m7, m3, q3232
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mulpd m0, m1, m4
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mulpd m1, m1, m5
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lea covarq, [covar2q + 16]
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ADDPD_MEM COVAR(-2,0), m0
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ADDPD_MEM COVAR(-2,1), m1
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lea jq, [iq + 2]
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cmp jd, -2
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jg .skip4x4
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.loop4x4:
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; Compute all 16 pairwise products of a 4x4 block
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mulpd m0, m4, m3
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mulpd m1, m5, m3
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mulpd m2, m6, m3
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mulpd m3, m3, m7
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ADDPD_MEM COVAR(0,0), m0
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ADDPD_MEM COVAR(0,1), m1
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ADDPD_MEM COVAR(0,2), m2
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ADDPD_MEM COVAR(0,3), m3
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mova m3, [varq + jq*8 + 16]
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mulpd m0, m4, m3
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mulpd m1, m5, m3
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mulpd m2, m6, m3
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mulpd m3, m3, m7
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ADDPD_MEM COVAR(2,0), m0
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ADDPD_MEM COVAR(2,1), m1
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ADDPD_MEM COVAR(2,2), m2
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ADDPD_MEM COVAR(2,3), m3
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mova m3, [varq + jq*8 + 32]
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add covarq, 32
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add jq, 4
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cmp jd, -2
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jle .loop4x4
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.skip4x4:
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test jd, jd
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jg .skip2x4
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mulpd m4, m3
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mulpd m5, m3
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mulpd m6, m3
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mulpd m7, m3
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ADDPD_MEM COVAR(0,0), m4
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ADDPD_MEM COVAR(0,1), m5
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ADDPD_MEM COVAR(0,2), m6
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ADDPD_MEM COVAR(0,3), m7
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.skip2x4:
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add iq, 4
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add covar2q, 4*COVAR_STRIDE+32
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cmp id, -2
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jle .loopi
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test id, id
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jg .ret
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mov jq, iq
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%define covarq covar2q
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.loop2x1:
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movsd m0, [varq + iq*8]
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movlhps m0, m0
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mulpd m0, [varq + jq*8]
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ADDPD_MEM COVAR(0,0), m0
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inc iq
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add covarq, COVAR_STRIDE
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test id, id
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jle .loop2x1
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.ret:
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REP_RET
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%if HAVE_AVX_EXTERNAL
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INIT_YMM avx
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cglobal update_lls, 3,6,8, ctx, var, count, i, j, count2
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%define covarq ctxq
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mov countd, [ctxq + LLSModel.indep_count]
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lea count2d, [countq-2]
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xor id, id
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.loopi:
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; Compute all 10 pairwise products of a 4x4 block that lies on the diagonal
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mova ymm1, [varq + iq*8]
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vbroadcastsd ymm4, [varq + iq*8]
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vbroadcastsd ymm5, [varq + iq*8 + 8]
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vbroadcastsd ymm6, [varq + iq*8 + 16]
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vbroadcastsd ymm7, [varq + iq*8 + 24]
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vextractf128 xmm3, ymm1, 1
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vmulpd ymm0, ymm1, ymm4
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vmulpd ymm1, ymm1, ymm5
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vmulpd xmm2, xmm3, xmm6
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vmulpd xmm3, xmm3, xmm7
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ADDPD_MEM COVAR(iq ,0), ymm0
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ADDPD_MEM COVAR(iq ,1), ymm1
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ADDPD_MEM COVAR(iq+2,2), xmm2
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ADDPD_MEM COVAR(iq+2,3), xmm3
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lea jd, [iq + 4]
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cmp jd, count2d
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jg .skip4x4
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.loop4x4:
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; Compute all 16 pairwise products of a 4x4 block
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mova ymm3, [varq + jq*8]
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vmulpd ymm0, ymm3, ymm4
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vmulpd ymm1, ymm3, ymm5
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vmulpd ymm2, ymm3, ymm6
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vmulpd ymm3, ymm3, ymm7
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ADDPD_MEM COVAR(jq,0), ymm0
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ADDPD_MEM COVAR(jq,1), ymm1
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ADDPD_MEM COVAR(jq,2), ymm2
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ADDPD_MEM COVAR(jq,3), ymm3
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add jd, 4
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cmp jd, count2d
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jle .loop4x4
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.skip4x4:
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cmp jd, countd
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jg .skip2x4
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mova xmm3, [varq + jq*8]
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vmulpd xmm0, xmm3, xmm4
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vmulpd xmm1, xmm3, xmm5
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vmulpd xmm2, xmm3, xmm6
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vmulpd xmm3, xmm3, xmm7
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ADDPD_MEM COVAR(jq,0), xmm0
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ADDPD_MEM COVAR(jq,1), xmm1
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ADDPD_MEM COVAR(jq,2), xmm2
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ADDPD_MEM COVAR(jq,3), xmm3
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.skip2x4:
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add id, 4
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add covarq, 4*COVAR_STRIDE
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cmp id, count2d
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jle .loopi
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cmp id, countd
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jg .ret
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mov jd, id
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.loop2x1:
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vmovddup xmm0, [varq + iq*8]
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vmulpd xmm0, [varq + jq*8]
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ADDPD_MEM COVAR(jq,0), xmm0
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inc id
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add covarq, COVAR_STRIDE
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cmp id, countd
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jle .loop2x1
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.ret:
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REP_RET
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%endif
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INIT_XMM sse2
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cglobal evaluate_lls, 3,4,2, ctx, var, order, i
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; This function is often called on the same buffer as update_lls, but with
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; an offset. They can't both be aligned.
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; Load halves rather than movu to avoid store-forwarding stalls, since the
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; input was initialized immediately prior to this function using scalar math.
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%define coefsq ctxq
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mov id, orderd
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imul orderd, MAX_VARS
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lea coefsq, [ctxq + LLSModel.coeff + orderq*8]
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movsd m0, [varq]
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movhpd m0, [varq + 8]
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mulpd m0, [coefsq]
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lea coefsq, [coefsq + iq*8]
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lea varq, [varq + iq*8]
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neg iq
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add iq, 2
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.loop:
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movsd m1, [varq + iq*8]
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movhpd m1, [varq + iq*8 + 8]
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mulpd m1, [coefsq + iq*8]
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addpd m0, m1
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add iq, 2
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jl .loop
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jg .skip1
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movsd m1, [varq + iq*8]
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mulsd m1, [coefsq + iq*8]
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addpd m0, m1
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.skip1:
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movhlps m1, m0
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addsd m0, m1
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%if ARCH_X86_32
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movsd r0m, m0
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fld qword r0m
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%endif
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RET
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