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Diffstat (limited to 'libmpeg2/idct_altivec.c')
| -rw-r--r-- | libmpeg2/idct_altivec.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/libmpeg2/idct_altivec.c b/libmpeg2/idct_altivec.c new file mode 100644 index 0000000..b5b395a --- /dev/null +++ b/libmpeg2/idct_altivec.c @@ -0,0 +1,286 @@ +/* + * idct_altivec.c + * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> + * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> + * + * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. + * See http://libmpeg2.sourceforge.net/ for updates. + * + * mpeg2dec is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * mpeg2dec is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "config.h" + +#ifdef ARCH_PPC + +#ifdef HAVE_ALTIVEC_H +#include <altivec.h> +#endif +#include <inttypes.h> + +#include "mpeg2.h" +#include "attributes.h" +#include "mpeg2_internal.h" + +typedef vector signed char vector_s8_t; +typedef vector unsigned char vector_u8_t; +typedef vector signed short vector_s16_t; +typedef vector unsigned short vector_u16_t; +typedef vector signed int vector_s32_t; +typedef vector unsigned int vector_u32_t; + +#if defined(HAVE_ALTIVEC_H) && !defined(__APPLE_CC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 303) +/* work around gcc <3.3 vec_mergel bug */ +static inline vector_s16_t my_vec_mergel (vector_s16_t const A, + vector_s16_t const B) +{ + static const vector_u8_t mergel = { + 0x08, 0x09, 0x18, 0x19, 0x0a, 0x0b, 0x1a, 0x1b, + 0x0c, 0x0d, 0x1c, 0x1d, 0x0e, 0x0f, 0x1e, 0x1f + }; + return vec_perm (A, B, mergel); +} +#undef vec_mergel +#define vec_mergel my_vec_mergel +#endif + +#ifdef HAVE_ALTIVEC_H /* gnu */ +#define VEC_S16(a,b,c,d,e,f,g,h) {a, b, c, d, e, f, g, h} +#else /* apple */ +#define VEC_S16(a,b,c,d,e,f,g,h) (vector_s16_t) (a, b, c, d, e, f, g, h) +#endif + +static const vector_s16_t constants ATTR_ALIGN(16) = + VEC_S16 (23170, 13573, 6518, 21895, -23170, -21895, 32, 31); +static const vector_s16_t constants_1 ATTR_ALIGN(16) = + VEC_S16 (16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725); +static const vector_s16_t constants_2 ATTR_ALIGN(16) = + VEC_S16 (16069, 22289, 20995, 18895, 16069, 18895, 20995, 22289); +static const vector_s16_t constants_3 ATTR_ALIGN(16) = + VEC_S16 (21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692); +static const vector_s16_t constants_4 ATTR_ALIGN(16) = + VEC_S16 (13623, 18895, 17799, 16019, 13623, 16019, 17799, 18895); + +#define IDCT \ + vector_s16_t vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7; \ + vector_s16_t vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \ + vector_s16_t a0, a1, a2, ma2, c4, mc4, zero, bias; \ + vector_s16_t t0, t1, t2, t3, t4, t5, t6, t7, t8; \ + vector_u16_t shift; \ + \ + c4 = vec_splat (constants, 0); \ + a0 = vec_splat (constants, 1); \ + a1 = vec_splat (constants, 2); \ + a2 = vec_splat (constants, 3); \ + mc4 = vec_splat (constants, 4); \ + ma2 = vec_splat (constants, 5); \ + bias = (vector_s16_t)vec_splat ((vector_s32_t)constants, 3); \ + \ + zero = vec_splat_s16 (0); \ + \ + vx0 = vec_adds (block[0], block[4]); \ + vx4 = vec_subs (block[0], block[4]); \ + t5 = vec_mradds (vx0, constants_1, zero); \ + t0 = vec_mradds (vx4, constants_1, zero); \ + \ + vx1 = vec_mradds (a1, block[7], block[1]); \ + vx7 = vec_mradds (a1, block[1], vec_subs (zero, block[7])); \ + t1 = vec_mradds (vx1, constants_2, zero); \ + t8 = vec_mradds (vx7, constants_2, zero); \ + \ + vx2 = vec_mradds (a0, block[6], block[2]); \ + vx6 = vec_mradds (a0, block[2], vec_subs (zero, block[6])); \ + t2 = vec_mradds (vx2, constants_3, zero); \ + t4 = vec_mradds (vx6, constants_3, zero); \ + \ + vx3 = vec_mradds (block[3], constants_4, zero); \ + vx5 = vec_mradds (block[5], constants_4, zero); \ + t7 = vec_mradds (a2, vx5, vx3); \ + t3 = vec_mradds (ma2, vx3, vx5); \ + \ + t6 = vec_adds (t8, t3); \ + t3 = vec_subs (t8, t3); \ + t8 = vec_subs (t1, t7); \ + t1 = vec_adds (t1, t7); \ + t6 = vec_mradds (a0, t6, t6); /* a0+1 == 2*c4 */ \ + t1 = vec_mradds (a0, t1, t1); /* a0+1 == 2*c4 */ \ + \ + t7 = vec_adds (t5, t2); \ + t2 = vec_subs (t5, t2); \ + t5 = vec_adds (t0, t4); \ + t0 = vec_subs (t0, t4); \ + t4 = vec_subs (t8, t3); \ + t3 = vec_adds (t8, t3); \ + \ + vy0 = vec_adds (t7, t1); \ + vy7 = vec_subs (t7, t1); \ + vy1 = vec_adds (t5, t3); \ + vy6 = vec_subs (t5, t3); \ + vy2 = vec_adds (t0, t4); \ + vy5 = vec_subs (t0, t4); \ + vy3 = vec_adds (t2, t6); \ + vy4 = vec_subs (t2, t6); \ + \ + vx0 = vec_mergeh (vy0, vy4); \ + vx1 = vec_mergel (vy0, vy4); \ + vx2 = vec_mergeh (vy1, vy5); \ + vx3 = vec_mergel (vy1, vy5); \ + vx4 = vec_mergeh (vy2, vy6); \ + vx5 = vec_mergel (vy2, vy6); \ + vx6 = vec_mergeh (vy3, vy7); \ + vx7 = vec_mergel (vy3, vy7); \ + \ + vy0 = vec_mergeh (vx0, vx4); \ + vy1 = vec_mergel (vx0, vx4); \ + vy2 = vec_mergeh (vx1, vx5); \ + vy3 = vec_mergel (vx1, vx5); \ + vy4 = vec_mergeh (vx2, vx6); \ + vy5 = vec_mergel (vx2, vx6); \ + vy6 = vec_mergeh (vx3, vx7); \ + vy7 = vec_mergel (vx3, vx7); \ + \ + vx0 = vec_mergeh (vy0, vy4); \ + vx1 = vec_mergel (vy0, vy4); \ + vx2 = vec_mergeh (vy1, vy5); \ + vx3 = vec_mergel (vy1, vy5); \ + vx4 = vec_mergeh (vy2, vy6); \ + vx5 = vec_mergel (vy2, vy6); \ + vx6 = vec_mergeh (vy3, vy7); \ + vx7 = vec_mergel (vy3, vy7); \ + \ + vx0 = vec_adds (vx0, bias); \ + t5 = vec_adds (vx0, vx4); \ + t0 = vec_subs (vx0, vx4); \ + \ + t1 = vec_mradds (a1, vx7, vx1); \ + t8 = vec_mradds (a1, vx1, vec_subs (zero, vx7)); \ + \ + t2 = vec_mradds (a0, vx6, vx2); \ + t4 = vec_mradds (a0, vx2, vec_subs (zero, vx6)); \ + \ + t7 = vec_mradds (a2, vx5, vx3); \ + t3 = vec_mradds (ma2, vx3, vx5); \ + \ + t6 = vec_adds (t8, t3); \ + t3 = vec_subs (t8, t3); \ + t8 = vec_subs (t1, t7); \ + t1 = vec_adds (t1, t7); \ + \ + t7 = vec_adds (t5, t2); \ + t2 = vec_subs (t5, t2); \ + t5 = vec_adds (t0, t4); \ + t0 = vec_subs (t0, t4); \ + t4 = vec_subs (t8, t3); \ + t3 = vec_adds (t8, t3); \ + \ + vy0 = vec_adds (t7, t1); \ + vy7 = vec_subs (t7, t1); \ + vy1 = vec_mradds (c4, t3, t5); \ + vy6 = vec_mradds (mc4, t3, t5); \ + vy2 = vec_mradds (c4, t4, t0); \ + vy5 = vec_mradds (mc4, t4, t0); \ + vy3 = vec_adds (t2, t6); \ + vy4 = vec_subs (t2, t6); \ + \ + shift = vec_splat_u16 (6); \ + vx0 = vec_sra (vy0, shift); \ + vx1 = vec_sra (vy1, shift); \ + vx2 = vec_sra (vy2, shift); \ + vx3 = vec_sra (vy3, shift); \ + vx4 = vec_sra (vy4, shift); \ + vx5 = vec_sra (vy5, shift); \ + vx6 = vec_sra (vy6, shift); \ + vx7 = vec_sra (vy7, shift); + +void mpeg2_idct_copy_altivec (int16_t * const _block, uint8_t * dest, + const int stride) +{ + vector_s16_t * const block = (vector_s16_t *)_block; + vector_u8_t tmp; + + IDCT + +#define COPY(dest,src) \ + tmp = vec_packsu (src, src); \ + vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \ + vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest); + + COPY (dest, vx0) dest += stride; + COPY (dest, vx1) dest += stride; + COPY (dest, vx2) dest += stride; + COPY (dest, vx3) dest += stride; + COPY (dest, vx4) dest += stride; + COPY (dest, vx5) dest += stride; + COPY (dest, vx6) dest += stride; + COPY (dest, vx7) + + block[0] = block[1] = block[2] = block[3] = zero; + block[4] = block[5] = block[6] = block[7] = zero; +} + +void mpeg2_idct_add_altivec (const int last, int16_t * const _block, + uint8_t * dest, const int stride) +{ + vector_s16_t * const block = (vector_s16_t *)_block; + vector_u8_t tmp; + vector_s16_t tmp2, tmp3; + vector_u8_t perm0; + vector_u8_t perm1; + vector_u8_t p0, p1, p; + + IDCT + + p0 = vec_lvsl (0, dest); + p1 = vec_lvsl (stride, dest); + p = vec_splat_u8 (-1); + perm0 = vec_mergeh (p, p0); + perm1 = vec_mergeh (p, p1); + +#define ADD(dest,src,perm) \ + /* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \ + tmp = vec_ld (0, dest); \ + tmp2 = (vector_s16_t)vec_perm (tmp, (vector_u8_t)zero, perm); \ + tmp3 = vec_adds (tmp2, src); \ + tmp = vec_packsu (tmp3, tmp3); \ + vec_ste ((vector_u32_t)tmp, 0, (unsigned int *)dest); \ + vec_ste ((vector_u32_t)tmp, 4, (unsigned int *)dest); + + ADD (dest, vx0, perm0) dest += stride; + ADD (dest, vx1, perm1) dest += stride; + ADD (dest, vx2, perm0) dest += stride; + ADD (dest, vx3, perm1) dest += stride; + ADD (dest, vx4, perm0) dest += stride; + ADD (dest, vx5, perm1) dest += stride; + ADD (dest, vx6, perm0) dest += stride; + ADD (dest, vx7, perm1) + + block[0] = block[1] = block[2] = block[3] = zero; + block[4] = block[5] = block[6] = block[7] = zero; +} + +void mpeg2_idct_altivec_init (void) +{ + int i, j; + + /* the altivec idct uses a transposed input, so we patch scan tables */ + for (i = 0; i < 64; i++) { + j = mpeg2_scan_norm[i]; + mpeg2_scan_norm[i] = (j >> 3) | ((j & 7) << 3); + j = mpeg2_scan_alt[i]; + mpeg2_scan_alt[i] = (j >> 3) | ((j & 7) << 3); + } +} + +#endif |