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288 lines
9.7 KiB
288 lines
9.7 KiB
/*
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* idct_altivec.c
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* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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#include "k9common.h"
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#ifdef ARCH_PPC
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#ifdef HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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#include "mpeg2.h"
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#include "attributes.h"
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#include "mpeg2_internal.h"
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typedef vector signed char vector_s8_t;
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typedef vector unsigned char vector_u8_t;
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typedef vector signed short vector_s16_t;
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typedef vector unsigned short vector_u16_t;
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typedef vector signed int vector_s32_t;
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typedef vector unsigned int vector_u32_t;
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#if defined(HAVE_ALTIVEC_H) && (__GNUC__ * 100 + __GNUC_MINOR__ < 303)
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/* work around gcc <3.3 vec_mergel bug */
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static inline vector_s16_t my_vec_mergel (vector_s16_t const A,
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vector_s16_t const B)
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{
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static const vector_u8_t mergel = {
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0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b,
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0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f
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};
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return vec_perm (A, B, mergel);
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}
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#undef vec_mergel
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#define vec_mergel my_vec_mergel
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#endif
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#ifdef HAVE_ALTIVEC_H /* gnu */
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#define VEC_S16(a,b,c,d,e,f,g,h) {a, b, c, d, e, f, g, h}
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#else /* apple */
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#define VEC_S16(a,b,c,d,e,f,g,h) (vector_s16_t) (a, b, c, d, e, f, g, h)
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#endif
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static const vector_s16_t constants ATTR_ALIGN(16) =
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VEC_S16 (23170, 13573, 6518, 21895, -23170, -21895, 32, 31);
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static const vector_s16_t constants_1 ATTR_ALIGN(16) =
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VEC_S16 (16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725);
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static const vector_s16_t constants_2 ATTR_ALIGN(16) =
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VEC_S16 (16069, 22289, 20995, 18895, 16069, 18895, 20995, 22289);
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static const vector_s16_t constants_3 ATTR_ALIGN(16) =
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VEC_S16 (21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692);
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static const vector_s16_t constants_4 ATTR_ALIGN(16) =
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VEC_S16 (13623, 18895, 17799, 16019, 13623, 16019, 17799, 18895);
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#define IDCT \
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vector_s16_t vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7; \
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vector_s16_t vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \
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vector_s16_t a0, a1, a2, ma2, c4, mc4, zero, bias; \
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vector_s16_t t0, t1, t2, t3, t4, t5, t6, t7, t8; \
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vector_u16_t shift; \
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\
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c4 = vec_splat (constants, 0); \
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a0 = vec_splat (constants, 1); \
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a1 = vec_splat (constants, 2); \
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a2 = vec_splat (constants, 3); \
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mc4 = vec_splat (constants, 4); \
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ma2 = vec_splat (constants, 5); \
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bias = (vector_s16_t)vec_splat ((vector_s32_t)constants, 3); \
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\
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zero = vec_splat_s16 (0); \
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\
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vx0 = vec_adds (block[0], block[4]); \
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vx4 = vec_subs (block[0], block[4]); \
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t5 = vec_mradds (vx0, constants_1, zero); \
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t0 = vec_mradds (vx4, constants_1, zero); \
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\
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vx1 = vec_mradds (a1, block[7], block[1]); \
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vx7 = vec_mradds (a1, block[1], vec_subs (zero, block[7])); \
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t1 = vec_mradds (vx1, constants_2, zero); \
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t8 = vec_mradds (vx7, constants_2, zero); \
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\
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vx2 = vec_mradds (a0, block[6], block[2]); \
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vx6 = vec_mradds (a0, block[2], vec_subs (zero, block[6])); \
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t2 = vec_mradds (vx2, constants_3, zero); \
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t4 = vec_mradds (vx6, constants_3, zero); \
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\
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vx3 = vec_mradds (block[3], constants_4, zero); \
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vx5 = vec_mradds (block[5], constants_4, zero); \
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t7 = vec_mradds (a2, vx5, vx3); \
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t3 = vec_mradds (ma2, vx3, vx5); \
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\
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t6 = vec_adds (t8, t3); \
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t3 = vec_subs (t8, t3); \
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t8 = vec_subs (t1, t7); \
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t1 = vec_adds (t1, t7); \
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t6 = vec_mradds (a0, t6, t6); /* a0+1 == 2*c4 */ \
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t1 = vec_mradds (a0, t1, t1); /* a0+1 == 2*c4 */ \
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\
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t7 = vec_adds (t5, t2); \
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t2 = vec_subs (t5, t2); \
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t5 = vec_adds (t0, t4); \
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t0 = vec_subs (t0, t4); \
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t4 = vec_subs (t8, t3); \
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t3 = vec_adds (t8, t3); \
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\
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vy0 = vec_adds (t7, t1); \
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vy7 = vec_subs (t7, t1); \
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vy1 = vec_adds (t5, t3); \
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vy6 = vec_subs (t5, t3); \
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vy2 = vec_adds (t0, t4); \
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vy5 = vec_subs (t0, t4); \
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vy3 = vec_adds (t2, t6); \
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vy4 = vec_subs (t2, t6); \
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\
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vx0 = vec_mergeh (vy0, vy4); \
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vx1 = vec_mergel (vy0, vy4); \
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vx2 = vec_mergeh (vy1, vy5); \
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vx3 = vec_mergel (vy1, vy5); \
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vx4 = vec_mergeh (vy2, vy6); \
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vx5 = vec_mergel (vy2, vy6); \
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vx6 = vec_mergeh (vy3, vy7); \
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vx7 = vec_mergel (vy3, vy7); \
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\
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vy0 = vec_mergeh (vx0, vx4); \
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vy1 = vec_mergel (vx0, vx4); \
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vy2 = vec_mergeh (vx1, vx5); \
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vy3 = vec_mergel (vx1, vx5); \
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vy4 = vec_mergeh (vx2, vx6); \
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vy5 = vec_mergel (vx2, vx6); \
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vy6 = vec_mergeh (vx3, vx7); \
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vy7 = vec_mergel (vx3, vx7); \
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\
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vx0 = vec_mergeh (vy0, vy4); \
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vx1 = vec_mergel (vy0, vy4); \
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vx2 = vec_mergeh (vy1, vy5); \
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vx3 = vec_mergel (vy1, vy5); \
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vx4 = vec_mergeh (vy2, vy6); \
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vx5 = vec_mergel (vy2, vy6); \
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vx6 = vec_mergeh (vy3, vy7); \
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vx7 = vec_mergel (vy3, vy7); \
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\
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vx0 = vec_adds (vx0, bias); \
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t5 = vec_adds (vx0, vx4); \
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t0 = vec_subs (vx0, vx4); \
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\
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t1 = vec_mradds (a1, vx7, vx1); \
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t8 = vec_mradds (a1, vx1, vec_subs (zero, vx7)); \
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\
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t2 = vec_mradds (a0, vx6, vx2); \
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t4 = vec_mradds (a0, vx2, vec_subs (zero, vx6)); \
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\
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t7 = vec_mradds (a2, vx5, vx3); \
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t3 = vec_mradds (ma2, vx3, vx5); \
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\
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t6 = vec_adds (t8, t3); \
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t3 = vec_subs (t8, t3); \
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t8 = vec_subs (t1, t7); \
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t1 = vec_adds (t1, t7); \
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\
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t7 = vec_adds (t5, t2); \
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t2 = vec_subs (t5, t2); \
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t5 = vec_adds (t0, t4); \
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t0 = vec_subs (t0, t4); \
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t4 = vec_subs (t8, t3); \
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t3 = vec_adds (t8, t3); \
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\
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vy0 = vec_adds (t7, t1); \
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vy7 = vec_subs (t7, t1); \
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vy1 = vec_mradds (c4, t3, t5); \
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vy6 = vec_mradds (mc4, t3, t5); \
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vy2 = vec_mradds (c4, t4, t0); \
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vy5 = vec_mradds (mc4, t4, t0); \
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vy3 = vec_adds (t2, t6); \
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vy4 = vec_subs (t2, t6); \
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\
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shift = vec_splat_u16 (6); \
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vx0 = vec_sra (vy0, shift); \
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vx1 = vec_sra (vy1, shift); \
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vx2 = vec_sra (vy2, shift); \
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vx3 = vec_sra (vy3, shift); \
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vx4 = vec_sra (vy4, shift); \
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vx5 = vec_sra (vy5, shift); \
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vx6 = vec_sra (vy6, shift); \
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vx7 = vec_sra (vy7, shift);
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void mpeg2_idct_copy_altivec (int16_t * const _block, uint8_t * dest,
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const int stride)
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{
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vector_s16_t * const block = (vector_s16_t *)_block;
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vector_u8_t tmp;
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IDCT
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#define COPY(dest,src) \
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tmp = vec_packsu (src, src); \
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vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \
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vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest);
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COPY (dest, vx0) dest += stride;
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COPY (dest, vx1) dest += stride;
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COPY (dest, vx2) dest += stride;
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COPY (dest, vx3) dest += stride;
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COPY (dest, vx4) dest += stride;
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COPY (dest, vx5) dest += stride;
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COPY (dest, vx6) dest += stride;
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COPY (dest, vx7)
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block[0] = block[1] = block[2] = block[3] = zero;
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block[4] = block[5] = block[6] = block[7] = zero;
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}
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void mpeg2_idct_add_altivec (const int last, int16_t * const _block,
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uint8_t * dest, const int stride)
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{
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vector_s16_t * const block = (vector_s16_t *)_block;
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vector_u8_t tmp;
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vector_s16_t tmp2, tmp3;
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vector_u8_t perm0;
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vector_u8_t perm1;
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vector_u8_t p0, p1, p;
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IDCT
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p0 = vec_lvsl (0, dest);
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p1 = vec_lvsl (stride, dest);
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p = vec_splat_u8 (-1);
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perm0 = vec_mergeh (p, p0);
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perm1 = vec_mergeh (p, p1);
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#define ADD(dest,src,perm) \
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/* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
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tmp = vec_ld (0, dest); \
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tmp2 = (vector_s16_t)vec_perm (tmp, (vector_u8_t)zero, perm); \
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tmp3 = vec_adds (tmp2, src); \
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tmp = vec_packsu (tmp3, tmp3); \
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vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \
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vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest);
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ADD (dest, vx0, perm0) dest += stride;
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ADD (dest, vx1, perm1) dest += stride;
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ADD (dest, vx2, perm0) dest += stride;
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ADD (dest, vx3, perm1) dest += stride;
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ADD (dest, vx4, perm0) dest += stride;
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ADD (dest, vx5, perm1) dest += stride;
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ADD (dest, vx6, perm0) dest += stride;
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ADD (dest, vx7, perm1)
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block[0] = block[1] = block[2] = block[3] = zero;
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block[4] = block[5] = block[6] = block[7] = zero;
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}
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void mpeg2_idct_altivec_init (void)
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{
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extern uint8_t mpeg2_scan_norm[64];
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extern uint8_t mpeg2_scan_alt[64];
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int i, j;
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/* the altivec idct uses a transposed input, so we patch scan tables */
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for (i = 0; i < 64; i++) {
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j = mpeg2_scan_norm[i];
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mpeg2_scan_norm[i] = (j >> 3) | ((j & 7) << 3);
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j = mpeg2_scan_alt[i];
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mpeg2_scan_alt[i] = (j >> 3) | ((j & 7) << 3);
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}
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}
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#endif
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