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FFmpeg/libavcodec/i386/fdct_mmx.c

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/*
* MMX optimized forward DCT
* The gcc porting is Copyright (c) 2001 Fabrice Bellard.
* cleanup/optimizations are Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* SSE2 optimization is Copyright (c) 2004 Denes Balatoni.
*
* from fdctam32.c - AP922 MMX(3D-Now) forward-DCT
*
* Intel Application Note AP-922 - fast, precise implementation of DCT
* http://developer.intel.com/vtune/cbts/appnotes.htm
*
* Also of inspiration:
* a page about fdct at http://www.geocities.com/ssavekar/dct.htm
* Skal's fdct at http://skal.planet-d.net/coding/dct.html
*/
#include "../common.h"
#include "mmx.h"
#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
//////////////////////////////////////////////////////////////////////
//
// constants for the forward DCT
// -----------------------------
//
// Be sure to check that your compiler is aligning all constants to QWORD
// (8-byte) memory boundaries! Otherwise the unaligned memory access will
// severely stall MMX execution.
//
//////////////////////////////////////////////////////////////////////
#define BITS_FRW_ACC 3 //; 2 or 3 for accuracy
#define SHIFT_FRW_COL BITS_FRW_ACC
#define SHIFT_FRW_ROW (BITS_FRW_ACC + 17 - 3)
#define RND_FRW_ROW (1 << (SHIFT_FRW_ROW-1))
//#define RND_FRW_COL (1 << (SHIFT_FRW_COL-1))
//concatenated table, for forward DCT transformation
static const int16_t fdct_tg_all_16[] ATTR_ALIGN(8) = {
13036, 13036, 13036, 13036, // tg * (2<<16) + 0.5
27146, 27146, 27146, 27146, // tg * (2<<16) + 0.5
-21746, -21746, -21746, -21746, // tg * (2<<16) + 0.5
};
static const int16_t ocos_4_16[4] ATTR_ALIGN(8) = {
23170, 23170, 23170, 23170, //cos * (2<<15) + 0.5
};
static const long long fdct_one_corr ATTR_ALIGN(8) = 0x0001000100010001LL;
static const long fdct_r_row[2] ATTR_ALIGN(8) = {RND_FRW_ROW, RND_FRW_ROW };
static const long fdct_r_row_sse2[4] ATTR_ALIGN(16) = {RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW};
static const int16_t tab_frw_01234567[] ATTR_ALIGN(8) = { // forward_dct coeff table
16384, 16384, -8867, -21407,
16384, 16384, 21407, 8867,
16384, -16384, 21407, -8867,
-16384, 16384, 8867, -21407,
22725, 19266, -22725, -12873,
12873, 4520, 19266, -4520,
12873, -22725, 19266, -22725,
4520, 19266, 4520, -12873,
22725, 22725, -12299, -29692,
22725, 22725, 29692, 12299,
22725, -22725, 29692, -12299,
-22725, 22725, 12299, -29692,
31521, 26722, -31521, -17855,
17855, 6270, 26722, -6270,
17855, -31521, 26722, -31521,
6270, 26722, 6270, -17855,
21407, 21407, -11585, -27969,
21407, 21407, 27969, 11585,
21407, -21407, 27969, -11585,
-21407, 21407, 11585, -27969,
29692, 25172, -29692, -16819,
16819, 5906, 25172, -5906,
16819, -29692, 25172, -29692,
5906, 25172, 5906, -16819,
19266, 19266, -10426, -25172,
19266, 19266, 25172, 10426,
19266, -19266, 25172, -10426,
-19266, 19266, 10426, -25172,
26722, 22654, -26722, -15137,
15137, 5315, 22654, -5315,
15137, -26722, 22654, -26722,
5315, 22654, 5315, -15137,
16384, 16384, -8867, -21407,
16384, 16384, 21407, 8867,
16384, -16384, 21407, -8867,
-16384, 16384, 8867, -21407,
22725, 19266, -22725, -12873,
12873, 4520, 19266, -4520,
12873, -22725, 19266, -22725,
4520, 19266, 4520, -12873,
19266, 19266, -10426, -25172,
19266, 19266, 25172, 10426,
19266, -19266, 25172, -10426,
-19266, 19266, 10426, -25172,
26722, 22654, -26722, -15137,
15137, 5315, 22654, -5315,
15137, -26722, 22654, -26722,
5315, 22654, 5315, -15137,
21407, 21407, -11585, -27969,
21407, 21407, 27969, 11585,
21407, -21407, 27969, -11585,
-21407, 21407, 11585, -27969,
29692, 25172, -29692, -16819,
16819, 5906, 25172, -5906,
16819, -29692, 25172, -29692,
5906, 25172, 5906, -16819,
22725, 22725, -12299, -29692,
22725, 22725, 29692, 12299,
22725, -22725, 29692, -12299,
-22725, 22725, 12299, -29692,
31521, 26722, -31521, -17855,
17855, 6270, 26722, -6270,
17855, -31521, 26722, -31521,
6270, 26722, 6270, -17855,
};
static const int16_t tab_frw_01234567_sse2[] ATTR_ALIGN(16) = { // forward_dct coeff table
#define TABLE_SSE2 C4, C4, C1, C3, -C6, -C2, -C1, -C5, \
C4, C4, C5, C7, C2, C6, C3, -C7, \
-C4, C4, C7, C3, C6, -C2, C7, -C5, \
C4, -C4, C5, -C1, C2, -C6, C3, -C1,
// c1..c7 * cos(pi/4) * 2^15
#define C1 22725
#define C2 21407
#define C3 19266
#define C4 16384
#define C5 12873
#define C6 8867
#define C7 4520
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 31521
#define C2 29692
#define C3 26722
#define C4 22725
#define C5 17855
#define C6 12299
#define C7 6270
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 29692
#define C2 27969
#define C3 25172
#define C4 21407
#define C5 16819
#define C6 11585
#define C7 5906
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 26722
#define C2 25172
#define C3 22654
#define C4 19266
#define C5 15137
#define C6 10426
#define C7 5315
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 22725
#define C2 21407
#define C3 19266
#define C4 16384
#define C5 12873
#define C6 8867
#define C7 4520
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 26722
#define C2 25172
#define C3 22654
#define C4 19266
#define C5 15137
#define C6 10426
#define C7 5315
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 29692
#define C2 27969
#define C3 25172
#define C4 21407
#define C5 16819
#define C6 11585
#define C7 5906
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1 31521
#define C2 29692
#define C3 26722
#define C4 22725
#define C5 17855
#define C6 12299
#define C7 6270
TABLE_SSE2
};
static always_inline void fdct_col(const int16_t *in, int16_t *out, int offset)
{
movq_m2r(*(in + offset + 1 * 8), mm0);
movq_m2r(*(in + offset + 6 * 8), mm1);
movq_r2r(mm0, mm2);
movq_m2r(*(in + offset + 2 * 8), mm3);
paddsw_r2r(mm1, mm0);
movq_m2r(*(in + offset + 5 * 8), mm4);
psllw_i2r(SHIFT_FRW_COL, mm0);
movq_m2r(*(in + offset + 0 * 8), mm5);
paddsw_r2r(mm3, mm4);
paddsw_m2r(*(in + offset + 7 * 8), mm5);
psllw_i2r(SHIFT_FRW_COL, mm4);
movq_r2r(mm0, mm6);
psubsw_r2r(mm1, mm2);
movq_m2r(*(fdct_tg_all_16 + 4), mm1);
psubsw_r2r(mm4, mm0);
movq_m2r(*(in + offset + 3 * 8), mm7);
pmulhw_r2r(mm0, mm1);
paddsw_m2r(*(in + offset + 4 * 8), mm7);
psllw_i2r(SHIFT_FRW_COL, mm5);
paddsw_r2r(mm4, mm6);
psllw_i2r(SHIFT_FRW_COL, mm7);
movq_r2r(mm5, mm4);
psubsw_r2r(mm7, mm5);
paddsw_r2r(mm5, mm1);
paddsw_r2r(mm7, mm4);
por_m2r(fdct_one_corr, mm1);
psllw_i2r(SHIFT_FRW_COL + 1, mm2);
pmulhw_m2r(*(fdct_tg_all_16 + 4), mm5);
movq_r2r(mm4, mm7);
psubsw_m2r(*(in + offset + 5 * 8), mm3);
psubsw_r2r(mm6, mm4);
movq_r2m(mm1, *(out + offset + 2 * 8));
paddsw_r2r(mm6, mm7);
movq_m2r(*(in + offset + 3 * 8), mm1);
psllw_i2r(SHIFT_FRW_COL + 1, mm3);
psubsw_m2r(*(in + offset + 4 * 8), mm1);
movq_r2r(mm2, mm6);
movq_r2m(mm4, *(out + offset + 4 * 8));
paddsw_r2r(mm3, mm2);
pmulhw_m2r(*ocos_4_16, mm2);
psubsw_r2r(mm3, mm6);
pmulhw_m2r(*ocos_4_16, mm6);
psubsw_r2r(mm0, mm5);
por_m2r(fdct_one_corr, mm5);
psllw_i2r(SHIFT_FRW_COL, mm1);
por_m2r(fdct_one_corr, mm2);
movq_r2r(mm1, mm4);
movq_m2r(*(in + offset + 0 * 8), mm3);
paddsw_r2r(mm6, mm1);
psubsw_m2r(*(in + offset + 7 * 8), mm3);
psubsw_r2r(mm6, mm4);
movq_m2r(*(fdct_tg_all_16 + 0), mm0);
psllw_i2r(SHIFT_FRW_COL, mm3);
movq_m2r(*(fdct_tg_all_16 + 8), mm6);
pmulhw_r2r(mm1, mm0);
movq_r2m(mm7, *(out + offset + 0 * 8));
pmulhw_r2r(mm4, mm6);
movq_r2m(mm5, *(out + offset + 6 * 8));
movq_r2r(mm3, mm7);
movq_m2r(*(fdct_tg_all_16 + 8), mm5);
psubsw_r2r(mm2, mm7);
paddsw_r2r(mm2, mm3);
pmulhw_r2r(mm7, mm5);
paddsw_r2r(mm3, mm0);
paddsw_r2r(mm4, mm6);
pmulhw_m2r(*(fdct_tg_all_16 + 0), mm3);
por_m2r(fdct_one_corr, mm0);
paddsw_r2r(mm7, mm5);
psubsw_r2r(mm6, mm7);
movq_r2m(mm0, *(out + offset + 1 * 8));
paddsw_r2r(mm4, mm5);
movq_r2m(mm7, *(out + offset + 3 * 8));
psubsw_r2r(mm1, mm3);
movq_r2m(mm5, *(out + offset + 5 * 8));
movq_r2m(mm3, *(out + offset + 7 * 8));
}
static always_inline void fdct_row_sse2(const int16_t *in, int16_t *out)
{
asm volatile(
".macro FDCT_ROW_SSE2_H1 i t \n\t"
"movq \\i(%0), %%xmm2 \n\t"
"movq \\i+8(%0), %%xmm0 \n\t"
"movdqa \\t+32(%1), %%xmm3 \n\t"
"movdqa \\t+48(%1), %%xmm7 \n\t"
"movdqa \\t(%1), %%xmm4 \n\t"
"movdqa \\t+16(%1), %%xmm5 \n\t"
".endm \n\t"
".macro FDCT_ROW_SSE2_H2 i t \n\t"
"movq \\i(%0), %%xmm2 \n\t"
"movq \\i+8(%0), %%xmm0 \n\t"
"movdqa \\t+32(%1), %%xmm3 \n\t"
"movdqa \\t+48(%1), %%xmm7 \n\t"
".endm \n\t"
".macro FDCT_ROW_SSE2 i \n\t"
"movq %%xmm2, %%xmm1 \n\t"
"pshuflw $27, %%xmm0, %%xmm0 \n\t"
"paddsw %%xmm0, %%xmm1 \n\t"
"psubsw %%xmm0, %%xmm2 \n\t"
"punpckldq %%xmm2, %%xmm1 \n\t"
"pshufd $78, %%xmm1, %%xmm2 \n\t"
"pmaddwd %%xmm2, %%xmm3 \n\t"
"pmaddwd %%xmm1, %%xmm7 \n\t"
"pmaddwd %%xmm5, %%xmm2 \n\t"
"pmaddwd %%xmm4, %%xmm1 \n\t"
"paddd %%xmm7, %%xmm3 \n\t"
"paddd %%xmm2, %%xmm1 \n\t"
"paddd %%xmm6, %%xmm3 \n\t"
"paddd %%xmm6, %%xmm1 \n\t"
"psrad %3, %%xmm3 \n\t"
"psrad %3, %%xmm1 \n\t"
"packssdw %%xmm3, %%xmm1 \n\t"
"movdqa %%xmm1, \\i(%4) \n\t"
".endm \n\t"
"movdqa (%2), %%xmm6 \n\t"
"FDCT_ROW_SSE2_H1 0 0 \n\t"
"FDCT_ROW_SSE2 0 \n\t"
"FDCT_ROW_SSE2_H2 64 0 \n\t"
"FDCT_ROW_SSE2 64 \n\t"
"FDCT_ROW_SSE2_H1 16 64 \n\t"
"FDCT_ROW_SSE2 16 \n\t"
"FDCT_ROW_SSE2_H2 112 64 \n\t"
"FDCT_ROW_SSE2 112 \n\t"
"FDCT_ROW_SSE2_H1 32 128 \n\t"
"FDCT_ROW_SSE2 32 \n\t"
"FDCT_ROW_SSE2_H2 96 128 \n\t"
"FDCT_ROW_SSE2 96 \n\t"
"FDCT_ROW_SSE2_H1 48 192 \n\t"
"FDCT_ROW_SSE2 48 \n\t"
"FDCT_ROW_SSE2_H2 80 192 \n\t"
"FDCT_ROW_SSE2 80 \n\t"
:
: "r" (in), "r" (tab_frw_01234567_sse2), "r" (fdct_r_row_sse2), "i" (SHIFT_FRW_ROW), "r" (out)
);
}
static always_inline void fdct_row_mmx2(const int16_t *in, int16_t *out, const int16_t *table)
{
pshufw_m2r(*(in + 4), mm5, 0x1B);
movq_m2r(*(in + 0), mm0);
movq_r2r(mm0, mm1);
paddsw_r2r(mm5, mm0);
psubsw_r2r(mm5, mm1);
pshufw_r2r(mm0, mm2, 0x4E);
pshufw_r2r(mm1, mm3, 0x4E);
movq_m2r(*(table + 0), mm4);
movq_m2r(*(table + 4), mm6);
movq_m2r(*(table + 16), mm5);
movq_m2r(*(table + 20), mm7);
pmaddwd_r2r(mm0, mm4);
pmaddwd_r2r(mm1, mm5);
pmaddwd_r2r(mm2, mm6);
pmaddwd_r2r(mm3, mm7);
pmaddwd_m2r(*(table + 8), mm0);
pmaddwd_m2r(*(table + 12), mm2);
pmaddwd_m2r(*(table + 24), mm1);
pmaddwd_m2r(*(table + 28), mm3);
paddd_r2r(mm6, mm4);
paddd_r2r(mm7, mm5);
paddd_r2r(mm2, mm0);
paddd_r2r(mm3, mm1);
movq_m2r(*fdct_r_row, mm7);
paddd_r2r(mm7, mm4);
paddd_r2r(mm7, mm5);
paddd_r2r(mm7, mm0);
paddd_r2r(mm7, mm1);
psrad_i2r(SHIFT_FRW_ROW, mm4);
psrad_i2r(SHIFT_FRW_ROW, mm5);
psrad_i2r(SHIFT_FRW_ROW, mm0);
psrad_i2r(SHIFT_FRW_ROW, mm1);
packssdw_r2r(mm0, mm4);
packssdw_r2r(mm1, mm5);
movq_r2r(mm4, mm2);
punpcklwd_r2r(mm5, mm4);
punpckhwd_r2r(mm5, mm2);
movq_r2m(mm4, *(out + 0));
movq_r2m(mm2, *(out + 4));
}
static always_inline void fdct_row_mmx(const int16_t *in, int16_t *out, const int16_t *table)
{
movd_m2r(*(in + 6), mm1);
punpcklwd_m2r(*(in + 4), mm1);
movq_r2r(mm1, mm2);
psrlq_i2r(0x20, mm1);
movq_m2r(*(in + 0), mm0);
punpcklwd_r2r(mm2, mm1);
movq_r2r(mm0, mm5);
paddsw_r2r(mm1, mm0);
psubsw_r2r(mm1, mm5);
movq_r2r(mm0, mm1);
movq_r2r(mm5, mm6);
punpckldq_r2r(mm5, mm3);
punpckhdq_r2r(mm3, mm6);
movq_m2r(*(table + 0), mm3);
movq_m2r(*(table + 4), mm4);
punpckldq_r2r(mm0, mm2);
pmaddwd_r2r(mm0, mm3);
punpckhdq_r2r(mm2, mm1);
movq_m2r(*(table + 16), mm2);
pmaddwd_r2r(mm1, mm4);
pmaddwd_m2r(*(table + 8), mm0);
movq_m2r(*(table + 20), mm7);
pmaddwd_r2r(mm5, mm2);
paddd_m2r(*fdct_r_row, mm3);
pmaddwd_r2r(mm6, mm7);
pmaddwd_m2r(*(table + 12), mm1);
paddd_r2r(mm4, mm3);
pmaddwd_m2r(*(table + 24), mm5);
pmaddwd_m2r(*(table + 28), mm6);
paddd_r2r(mm7, mm2);
paddd_m2r(*fdct_r_row, mm0);
psrad_i2r(SHIFT_FRW_ROW, mm3);
paddd_m2r(*fdct_r_row, mm2);
paddd_r2r(mm1, mm0);
paddd_m2r(*fdct_r_row, mm5);
psrad_i2r(SHIFT_FRW_ROW, mm2);
paddd_r2r(mm6, mm5);
psrad_i2r(SHIFT_FRW_ROW, mm0);
psrad_i2r(SHIFT_FRW_ROW, mm5);
packssdw_r2r(mm0, mm3);
packssdw_r2r(mm5, mm2);
movq_r2r(mm3, mm6);
punpcklwd_r2r(mm2, mm3);
punpckhwd_r2r(mm2, mm6);
movq_r2m(mm3, *(out + 0));
movq_r2m(mm6, *(out + 4));
}
void ff_fdct_mmx(int16_t *block)
{
int64_t align_tmp[16] ATTR_ALIGN(8);
int16_t * const block_tmp= (int16_t*)align_tmp;
int16_t *block1, *out;
const int16_t *table;
int i;
block1 = block_tmp;
fdct_col(block, block1, 0);
fdct_col(block, block1, 4);
block1 = block_tmp;
table = tab_frw_01234567;
out = block;
for(i=8;i>0;i--) {
fdct_row_mmx(block1, out, table);
block1 += 8;
table += 32;
out += 8;
}
}
void ff_fdct_mmx2(int16_t *block)
{
int64_t align_tmp[16] ATTR_ALIGN(8);
int16_t * const block_tmp= (int16_t*)align_tmp;
int16_t *block1, *out;
const int16_t *table;
int i;
block1 = block_tmp;
fdct_col(block, block1, 0);
fdct_col(block, block1, 4);
block1 = block_tmp;
table = tab_frw_01234567;
out = block;
for(i=8;i>0;i--) {
fdct_row_mmx2(block1, out, table);
block1 += 8;
table += 32;
out += 8;
}
}
void ff_fdct_sse2(int16_t *block)
{
int64_t align_tmp[16] ATTR_ALIGN(8);
int16_t * const block_tmp= (int16_t*)align_tmp;
int16_t *block1;
int i;
block1 = block_tmp;
fdct_col(block, block1, 0);
fdct_col(block, block1, 4);
fdct_row_sse2(block1, block);
}