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235 lines
6.2 KiB
235 lines
6.2 KiB
;****************************************************************************** |
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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 && 0 |
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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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