1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vpx_config.h"
#include "vp8_rtcd.h"
#include "vpx_ports/x86.h"
#include "vpx_mem/vpx_mem.h"
#include "vp8/encoder/block.h"
#include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */
#include <mmintrin.h> /* MMX */
#include <xmmintrin.h> /* SSE */
#include <emmintrin.h> /* SSE2 */
#define SELECT_EOB(i, z) \
do { \
short boost = *zbin_boost_ptr; \
int cmp = (x[z] < boost) | (y[z] == 0); \
zbin_boost_ptr++; \
if (cmp) break; \
qcoeff_ptr[z] = y[z]; \
eob = i; \
zbin_boost_ptr = b->zrun_zbin_boost; \
} while (0)
void vp8_regular_quantize_b_sse2(BLOCK *b, BLOCKD *d) {
char eob = 0;
short *zbin_boost_ptr;
short *qcoeff_ptr = d->qcoeff;
DECLARE_ALIGNED(16, short, x[16]);
DECLARE_ALIGNED(16, short, y[16]);
__m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1;
__m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift));
__m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8));
__m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
__m128i z1 = _mm_load_si128((__m128i *)(b->coeff + 8));
__m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra);
__m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin));
__m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8));
__m128i round0 = _mm_load_si128((__m128i *)(b->round));
__m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
__m128i quant0 = _mm_load_si128((__m128i *)(b->quant));
__m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8));
__m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
__m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
memset(qcoeff_ptr, 0, 32);
/* Duplicate to all lanes. */
zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0);
zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra);
/* Sign of z: z >> 15 */
sz0 = _mm_srai_epi16(z0, 15);
sz1 = _mm_srai_epi16(z1, 15);
/* x = abs(z): (z ^ sz) - sz */
x0 = _mm_xor_si128(z0, sz0);
x1 = _mm_xor_si128(z1, sz1);
x0 = _mm_sub_epi16(x0, sz0);
x1 = _mm_sub_epi16(x1, sz1);
/* zbin[] + zbin_extra */
zbin0 = _mm_add_epi16(zbin0, zbin_extra);
zbin1 = _mm_add_epi16(zbin1, zbin_extra);
/* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance
* the equation because boost is the only value which can change:
* x - (zbin[] + extra) >= boost */
x_minus_zbin0 = _mm_sub_epi16(x0, zbin0);
x_minus_zbin1 = _mm_sub_epi16(x1, zbin1);
_mm_store_si128((__m128i *)(x), x_minus_zbin0);
_mm_store_si128((__m128i *)(x + 8), x_minus_zbin1);
/* All the remaining calculations are valid whether they are done now with
* simd or later inside the loop one at a time. */
x0 = _mm_add_epi16(x0, round0);
x1 = _mm_add_epi16(x1, round1);
y0 = _mm_mulhi_epi16(x0, quant0);
y1 = _mm_mulhi_epi16(x1, quant1);
y0 = _mm_add_epi16(y0, x0);
y1 = _mm_add_epi16(y1, x1);
/* Instead of shifting each value independently we convert the scaling
* factor with 1 << (16 - shift) so we can use multiply/return high half. */
y0 = _mm_mulhi_epi16(y0, quant_shift0);
y1 = _mm_mulhi_epi16(y1, quant_shift1);
/* Return the sign: (y ^ sz) - sz */
y0 = _mm_xor_si128(y0, sz0);
y1 = _mm_xor_si128(y1, sz1);
y0 = _mm_sub_epi16(y0, sz0);
y1 = _mm_sub_epi16(y1, sz1);
_mm_store_si128((__m128i *)(y), y0);
_mm_store_si128((__m128i *)(y + 8), y1);
zbin_boost_ptr = b->zrun_zbin_boost;
/* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */
SELECT_EOB(1, 0);
SELECT_EOB(2, 1);
SELECT_EOB(3, 4);
SELECT_EOB(4, 8);
SELECT_EOB(5, 5);
SELECT_EOB(6, 2);
SELECT_EOB(7, 3);
SELECT_EOB(8, 6);
SELECT_EOB(9, 9);
SELECT_EOB(10, 12);
SELECT_EOB(11, 13);
SELECT_EOB(12, 10);
SELECT_EOB(13, 7);
SELECT_EOB(14, 11);
SELECT_EOB(15, 14);
SELECT_EOB(16, 15);
y0 = _mm_load_si128((__m128i *)(d->qcoeff));
y1 = _mm_load_si128((__m128i *)(d->qcoeff + 8));
/* dqcoeff = qcoeff * dequant */
y0 = _mm_mullo_epi16(y0, dequant0);
y1 = _mm_mullo_epi16(y1, dequant1);
_mm_store_si128((__m128i *)(d->dqcoeff), y0);
_mm_store_si128((__m128i *)(d->dqcoeff + 8), y1);
*d->eob = eob;
}
void vp8_fast_quantize_b_sse2(BLOCK *b, BLOCKD *d) {
__m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
__m128i z1 = _mm_load_si128((__m128i *)(b->coeff + 8));
__m128i round0 = _mm_load_si128((__m128i *)(b->round));
__m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
__m128i quant_fast0 = _mm_load_si128((__m128i *)(b->quant_fast));
__m128i quant_fast1 = _mm_load_si128((__m128i *)(b->quant_fast + 8));
__m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
__m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
__m128i inv_zig_zag0 =
_mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag));
__m128i inv_zig_zag1 =
_mm_load_si128((const __m128i *)(vp8_default_inv_zig_zag + 8));
__m128i sz0, sz1, x0, x1, y0, y1, xdq0, xdq1, zeros, ones;
/* sign of z: z >> 15 */
sz0 = _mm_srai_epi16(z0, 15);
sz1 = _mm_srai_epi16(z1, 15);
/* x = abs(z): (z ^ sz) - sz */
x0 = _mm_xor_si128(z0, sz0);
x1 = _mm_xor_si128(z1, sz1);
x0 = _mm_sub_epi16(x0, sz0);
x1 = _mm_sub_epi16(x1, sz1);
/* x += round */
x0 = _mm_add_epi16(x0, round0);
x1 = _mm_add_epi16(x1, round1);
/* y = (x * quant) >> 16 */
y0 = _mm_mulhi_epi16(x0, quant_fast0);
y1 = _mm_mulhi_epi16(x1, quant_fast1);
/* x = abs(y) = (y ^ sz) - sz */
y0 = _mm_xor_si128(y0, sz0);
y1 = _mm_xor_si128(y1, sz1);
x0 = _mm_sub_epi16(y0, sz0);
x1 = _mm_sub_epi16(y1, sz1);
/* qcoeff = x */
_mm_store_si128((__m128i *)(d->qcoeff), x0);
_mm_store_si128((__m128i *)(d->qcoeff + 8), x1);
/* x * dequant */
xdq0 = _mm_mullo_epi16(x0, dequant0);
xdq1 = _mm_mullo_epi16(x1, dequant1);
/* dqcoeff = x * dequant */
_mm_store_si128((__m128i *)(d->dqcoeff), xdq0);
_mm_store_si128((__m128i *)(d->dqcoeff + 8), xdq1);
/* build a mask for the zig zag */
zeros = _mm_setzero_si128();
x0 = _mm_cmpeq_epi16(x0, zeros);
x1 = _mm_cmpeq_epi16(x1, zeros);
ones = _mm_cmpeq_epi16(zeros, zeros);
x0 = _mm_xor_si128(x0, ones);
x1 = _mm_xor_si128(x1, ones);
x0 = _mm_and_si128(x0, inv_zig_zag0);
x1 = _mm_and_si128(x1, inv_zig_zag1);
x0 = _mm_max_epi16(x0, x1);
/* now down to 8 */
x1 = _mm_shuffle_epi32(x0, 0xE); // 0b00001110
x0 = _mm_max_epi16(x0, x1);
/* only 4 left */
x1 = _mm_shufflelo_epi16(x0, 0xE); // 0b00001110
x0 = _mm_max_epi16(x0, x1);
/* okay, just 2! */
x1 = _mm_shufflelo_epi16(x0, 0x1); // 0b00000001
x0 = _mm_max_epi16(x0, x1);
*d->eob = 0xFF & _mm_cvtsi128_si32(x0);
}
|
