mirror of https://git.ffmpeg.org/ffmpeg.git
464 lines
18 KiB
C
464 lines
18 KiB
C
/*
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* Copyright (C) 2003 James Klicman <james@klicman.org>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "config.h"
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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "libavutil/common.h"
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#include "libavcodec/dsputil.h"
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#include "dsputil_altivec.h"
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#define vs16(v) ((vector signed short)(v))
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#define vs32(v) ((vector signed int)(v))
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#define vu8(v) ((vector unsigned char)(v))
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#define vu16(v) ((vector unsigned short)(v))
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#define vu32(v) ((vector unsigned int)(v))
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#define C1 0.98078525066375732421875000 /* cos(1*PI/16) */
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#define C2 0.92387950420379638671875000 /* cos(2*PI/16) */
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#define C3 0.83146959543228149414062500 /* cos(3*PI/16) */
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#define C4 0.70710676908493041992187500 /* cos(4*PI/16) */
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#define C5 0.55557024478912353515625000 /* cos(5*PI/16) */
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#define C6 0.38268342614173889160156250 /* cos(6*PI/16) */
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#define C7 0.19509032368659973144531250 /* cos(7*PI/16) */
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#define SQRT_2 1.41421353816986083984375000 /* sqrt(2) */
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#define W0 -(2 * C2)
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#define W1 (2 * C6)
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#define W2 (SQRT_2 * C6)
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#define W3 (SQRT_2 * C3)
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#define W4 (SQRT_2 * (-C1 + C3 + C5 - C7))
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#define W5 (SQRT_2 * ( C1 + C3 - C5 + C7))
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#define W6 (SQRT_2 * ( C1 + C3 + C5 - C7))
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#define W7 (SQRT_2 * ( C1 + C3 - C5 - C7))
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#define W8 (SQRT_2 * ( C7 - C3))
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#define W9 (SQRT_2 * (-C1 - C3))
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#define WA (SQRT_2 * (-C3 - C5))
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#define WB (SQRT_2 * ( C5 - C3))
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static vector float fdctconsts[3] = {
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{ W0, W1, W2, W3 },
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{ W4, W5, W6, W7 },
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{ W8, W9, WA, WB }
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};
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#define LD_W0 vec_splat(cnsts0, 0)
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#define LD_W1 vec_splat(cnsts0, 1)
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#define LD_W2 vec_splat(cnsts0, 2)
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#define LD_W3 vec_splat(cnsts0, 3)
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#define LD_W4 vec_splat(cnsts1, 0)
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#define LD_W5 vec_splat(cnsts1, 1)
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#define LD_W6 vec_splat(cnsts1, 2)
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#define LD_W7 vec_splat(cnsts1, 3)
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#define LD_W8 vec_splat(cnsts2, 0)
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#define LD_W9 vec_splat(cnsts2, 1)
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#define LD_WA vec_splat(cnsts2, 2)
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#define LD_WB vec_splat(cnsts2, 3)
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#define FDCTROW(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */ \
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x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \
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x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \
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x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \
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x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \
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x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \
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x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \
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x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \
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x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \
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\
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b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \
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b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \
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b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \
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b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \
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\
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b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \
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b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \
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b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \
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cnst = LD_W2; \
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b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \
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cnst = LD_W1; \
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b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \
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cnst = LD_W0; \
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b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \
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\
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x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \
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x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \
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x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \
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x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \
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x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \
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cnst = LD_W3; \
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x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \
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\
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cnst = LD_W8; \
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x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \
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cnst = LD_W9; \
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x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \
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cnst = LD_WA; \
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x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \
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cnst = LD_WB; \
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x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \
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\
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cnst = LD_W4; \
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b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \
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cnst = LD_W5; \
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b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \
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cnst = LD_W6; \
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b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \
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cnst = LD_W7; \
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b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \
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\
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b7 = vec_add(b7, x2); /* b7 = b7 + x2; */ \
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b5 = vec_add(b5, x3); /* b5 = b5 + x3; */ \
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b3 = vec_add(b3, x2); /* b3 = b3 + x2; */ \
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b1 = vec_add(b1, x3); /* b1 = b1 + x3; */ \
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/* }}} */
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#define FDCTCOL(b0,b1,b2,b3,b4,b5,b6,b7) /* {{{ */ \
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x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \
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x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \
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x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \
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x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \
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x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \
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x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \
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x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \
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x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \
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\
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b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \
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b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \
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b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \
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b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \
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\
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b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \
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b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \
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b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \
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cnst = LD_W2; \
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b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \
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cnst = LD_W1; \
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b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \
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cnst = LD_W0; \
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b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \
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\
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x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \
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x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \
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x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \
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x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \
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x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \
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cnst = LD_W3; \
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x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \
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\
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cnst = LD_W8; \
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x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \
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cnst = LD_W9; \
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x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \
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cnst = LD_WA; \
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x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \
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cnst = LD_WB; \
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x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \
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\
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cnst = LD_W4; \
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b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \
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cnst = LD_W5; \
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b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \
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cnst = LD_W6; \
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b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \
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cnst = LD_W7; \
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b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \
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\
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b7 = vec_add(b7, x2); /* b7 += x2; */ \
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b5 = vec_add(b5, x3); /* b5 += x3; */ \
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b3 = vec_add(b3, x2); /* b3 += x2; */ \
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b1 = vec_add(b1, x3); /* b1 += x3; */ \
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/* }}} */
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/* two dimensional discrete cosine transform */
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void ff_fdct_altivec(int16_t *block)
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{
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vector signed short *bp;
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vector float *cp;
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vector float b00, b10, b20, b30, b40, b50, b60, b70;
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vector float b01, b11, b21, b31, b41, b51, b61, b71;
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vector float mzero, cnst, cnsts0, cnsts1, cnsts2;
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vector float x0, x1, x2, x3, x4, x5, x6, x7, x8;
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/* setup constants {{{ */
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/* mzero = -0.0 */
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mzero = ((vector float)vec_splat_u32(-1));
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mzero = ((vector float)vec_sl(vu32(mzero), vu32(mzero)));
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cp = fdctconsts;
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cnsts0 = vec_ld(0, cp); cp++;
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cnsts1 = vec_ld(0, cp); cp++;
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cnsts2 = vec_ld(0, cp);
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/* }}} */
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/* 8x8 matrix transpose (vector short[8]) {{{ */
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#define MERGE_S16(hl,a,b) vec_merge##hl(vs16(a), vs16(b))
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bp = (vector signed short*)block;
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b00 = ((vector float)vec_ld(0, bp));
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b40 = ((vector float)vec_ld(16*4, bp));
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b01 = ((vector float)MERGE_S16(h, b00, b40));
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b11 = ((vector float)MERGE_S16(l, b00, b40));
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bp++;
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b10 = ((vector float)vec_ld(0, bp));
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b50 = ((vector float)vec_ld(16*4, bp));
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b21 = ((vector float)MERGE_S16(h, b10, b50));
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b31 = ((vector float)MERGE_S16(l, b10, b50));
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bp++;
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b20 = ((vector float)vec_ld(0, bp));
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b60 = ((vector float)vec_ld(16*4, bp));
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b41 = ((vector float)MERGE_S16(h, b20, b60));
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b51 = ((vector float)MERGE_S16(l, b20, b60));
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bp++;
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b30 = ((vector float)vec_ld(0, bp));
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b70 = ((vector float)vec_ld(16*4, bp));
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b61 = ((vector float)MERGE_S16(h, b30, b70));
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b71 = ((vector float)MERGE_S16(l, b30, b70));
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x0 = ((vector float)MERGE_S16(h, b01, b41));
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x1 = ((vector float)MERGE_S16(l, b01, b41));
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x2 = ((vector float)MERGE_S16(h, b11, b51));
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x3 = ((vector float)MERGE_S16(l, b11, b51));
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x4 = ((vector float)MERGE_S16(h, b21, b61));
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x5 = ((vector float)MERGE_S16(l, b21, b61));
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x6 = ((vector float)MERGE_S16(h, b31, b71));
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x7 = ((vector float)MERGE_S16(l, b31, b71));
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b00 = ((vector float)MERGE_S16(h, x0, x4));
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b10 = ((vector float)MERGE_S16(l, x0, x4));
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b20 = ((vector float)MERGE_S16(h, x1, x5));
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b30 = ((vector float)MERGE_S16(l, x1, x5));
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b40 = ((vector float)MERGE_S16(h, x2, x6));
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b50 = ((vector float)MERGE_S16(l, x2, x6));
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b60 = ((vector float)MERGE_S16(h, x3, x7));
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b70 = ((vector float)MERGE_S16(l, x3, x7));
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#undef MERGE_S16
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/* }}} */
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/* Some of the initial calculations can be done as vector short before
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* conversion to vector float. The following code section takes advantage
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* of this.
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*/
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/* fdct rows {{{ */
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x0 = ((vector float)vec_add(vs16(b00), vs16(b70)));
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x7 = ((vector float)vec_sub(vs16(b00), vs16(b70)));
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x1 = ((vector float)vec_add(vs16(b10), vs16(b60)));
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x6 = ((vector float)vec_sub(vs16(b10), vs16(b60)));
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x2 = ((vector float)vec_add(vs16(b20), vs16(b50)));
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x5 = ((vector float)vec_sub(vs16(b20), vs16(b50)));
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x3 = ((vector float)vec_add(vs16(b30), vs16(b40)));
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x4 = ((vector float)vec_sub(vs16(b30), vs16(b40)));
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b70 = ((vector float)vec_add(vs16(x0), vs16(x3)));
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b10 = ((vector float)vec_add(vs16(x1), vs16(x2)));
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b00 = ((vector float)vec_add(vs16(b70), vs16(b10)));
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b40 = ((vector float)vec_sub(vs16(b70), vs16(b10)));
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#define CTF0(n) \
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b##n##1 = ((vector float)vec_unpackl(vs16(b##n##0))); \
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b##n##0 = ((vector float)vec_unpackh(vs16(b##n##0))); \
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b##n##1 = vec_ctf(vs32(b##n##1), 0); \
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b##n##0 = vec_ctf(vs32(b##n##0), 0);
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CTF0(0);
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CTF0(4);
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b20 = ((vector float)vec_sub(vs16(x0), vs16(x3)));
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b60 = ((vector float)vec_sub(vs16(x1), vs16(x2)));
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CTF0(2);
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CTF0(6);
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#undef CTF0
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x0 = vec_add(b60, b20);
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x1 = vec_add(b61, b21);
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cnst = LD_W2;
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x0 = vec_madd(cnst, x0, mzero);
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x1 = vec_madd(cnst, x1, mzero);
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cnst = LD_W1;
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b20 = vec_madd(cnst, b20, x0);
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b21 = vec_madd(cnst, b21, x1);
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cnst = LD_W0;
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b60 = vec_madd(cnst, b60, x0);
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b61 = vec_madd(cnst, b61, x1);
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#define CTFX(x,b) \
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b##0 = ((vector float)vec_unpackh(vs16(x))); \
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b##1 = ((vector float)vec_unpackl(vs16(x))); \
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b##0 = vec_ctf(vs32(b##0), 0); \
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b##1 = vec_ctf(vs32(b##1), 0); \
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CTFX(x4, b7);
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CTFX(x5, b5);
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CTFX(x6, b3);
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CTFX(x7, b1);
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#undef CTFX
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x0 = vec_add(b70, b10);
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x1 = vec_add(b50, b30);
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x2 = vec_add(b70, b30);
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x3 = vec_add(b50, b10);
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x8 = vec_add(x2, x3);
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cnst = LD_W3;
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x8 = vec_madd(cnst, x8, mzero);
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cnst = LD_W8;
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x0 = vec_madd(cnst, x0, mzero);
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cnst = LD_W9;
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x1 = vec_madd(cnst, x1, mzero);
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cnst = LD_WA;
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x2 = vec_madd(cnst, x2, x8);
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cnst = LD_WB;
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x3 = vec_madd(cnst, x3, x8);
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cnst = LD_W4;
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b70 = vec_madd(cnst, b70, x0);
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cnst = LD_W5;
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b50 = vec_madd(cnst, b50, x1);
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cnst = LD_W6;
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b30 = vec_madd(cnst, b30, x1);
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cnst = LD_W7;
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b10 = vec_madd(cnst, b10, x0);
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b70 = vec_add(b70, x2);
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b50 = vec_add(b50, x3);
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b30 = vec_add(b30, x2);
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b10 = vec_add(b10, x3);
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x0 = vec_add(b71, b11);
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x1 = vec_add(b51, b31);
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x2 = vec_add(b71, b31);
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x3 = vec_add(b51, b11);
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x8 = vec_add(x2, x3);
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|
cnst = LD_W3;
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x8 = vec_madd(cnst, x8, mzero);
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|
|
|
cnst = LD_W8;
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x0 = vec_madd(cnst, x0, mzero);
|
|
cnst = LD_W9;
|
|
x1 = vec_madd(cnst, x1, mzero);
|
|
cnst = LD_WA;
|
|
x2 = vec_madd(cnst, x2, x8);
|
|
cnst = LD_WB;
|
|
x3 = vec_madd(cnst, x3, x8);
|
|
|
|
cnst = LD_W4;
|
|
b71 = vec_madd(cnst, b71, x0);
|
|
cnst = LD_W5;
|
|
b51 = vec_madd(cnst, b51, x1);
|
|
cnst = LD_W6;
|
|
b31 = vec_madd(cnst, b31, x1);
|
|
cnst = LD_W7;
|
|
b11 = vec_madd(cnst, b11, x0);
|
|
|
|
b71 = vec_add(b71, x2);
|
|
b51 = vec_add(b51, x3);
|
|
b31 = vec_add(b31, x2);
|
|
b11 = vec_add(b11, x3);
|
|
/* }}} */
|
|
|
|
|
|
/* 8x8 matrix transpose (vector float[8][2]) {{{ */
|
|
x0 = vec_mergel(b00, b20);
|
|
x1 = vec_mergeh(b00, b20);
|
|
x2 = vec_mergel(b10, b30);
|
|
x3 = vec_mergeh(b10, b30);
|
|
|
|
b00 = vec_mergeh(x1, x3);
|
|
b10 = vec_mergel(x1, x3);
|
|
b20 = vec_mergeh(x0, x2);
|
|
b30 = vec_mergel(x0, x2);
|
|
|
|
x4 = vec_mergel(b41, b61);
|
|
x5 = vec_mergeh(b41, b61);
|
|
x6 = vec_mergel(b51, b71);
|
|
x7 = vec_mergeh(b51, b71);
|
|
|
|
b41 = vec_mergeh(x5, x7);
|
|
b51 = vec_mergel(x5, x7);
|
|
b61 = vec_mergeh(x4, x6);
|
|
b71 = vec_mergel(x4, x6);
|
|
|
|
x0 = vec_mergel(b01, b21);
|
|
x1 = vec_mergeh(b01, b21);
|
|
x2 = vec_mergel(b11, b31);
|
|
x3 = vec_mergeh(b11, b31);
|
|
|
|
x4 = vec_mergel(b40, b60);
|
|
x5 = vec_mergeh(b40, b60);
|
|
x6 = vec_mergel(b50, b70);
|
|
x7 = vec_mergeh(b50, b70);
|
|
|
|
b40 = vec_mergeh(x1, x3);
|
|
b50 = vec_mergel(x1, x3);
|
|
b60 = vec_mergeh(x0, x2);
|
|
b70 = vec_mergel(x0, x2);
|
|
|
|
b01 = vec_mergeh(x5, x7);
|
|
b11 = vec_mergel(x5, x7);
|
|
b21 = vec_mergeh(x4, x6);
|
|
b31 = vec_mergel(x4, x6);
|
|
/* }}} */
|
|
|
|
|
|
FDCTCOL(b00, b10, b20, b30, b40, b50, b60, b70);
|
|
FDCTCOL(b01, b11, b21, b31, b41, b51, b61, b71);
|
|
|
|
|
|
/* round, convert back to short {{{ */
|
|
#define CTS(n) \
|
|
b##n##0 = vec_round(b##n##0); \
|
|
b##n##1 = vec_round(b##n##1); \
|
|
b##n##0 = ((vector float)vec_cts(b##n##0, 0)); \
|
|
b##n##1 = ((vector float)vec_cts(b##n##1, 0)); \
|
|
b##n##0 = ((vector float)vec_pack(vs32(b##n##0), vs32(b##n##1))); \
|
|
vec_st(vs16(b##n##0), 0, bp);
|
|
|
|
bp = (vector signed short*)block;
|
|
CTS(0); bp++;
|
|
CTS(1); bp++;
|
|
CTS(2); bp++;
|
|
CTS(3); bp++;
|
|
CTS(4); bp++;
|
|
CTS(5); bp++;
|
|
CTS(6); bp++;
|
|
CTS(7);
|
|
|
|
#undef CTS
|
|
/* }}} */
|
|
}
|
|
|
|
/* vim:set foldmethod=marker foldlevel=0: */
|