1 /*
2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12 #include <smmintrin.h> /* SSE4.1 */
13
14 #include "./vp8_rtcd.h"
15 #include "vp8/encoder/block.h"
16 #include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */
17
18 #define SELECT_EOB(i, z, x, y, q) \
19 do { \
20 short boost = *zbin_boost_ptr; \
21 short x_z = _mm_extract_epi16(x, z); \
22 short y_z = _mm_extract_epi16(y, z); \
23 int cmp = (x_z < boost) | (y_z == 0); \
24 zbin_boost_ptr++; \
25 if (cmp) \
26 break; \
27 q = _mm_insert_epi16(q, y_z, z); \
28 eob = i; \
29 zbin_boost_ptr = b->zrun_zbin_boost; \
30 } while (0)
31
vp8_regular_quantize_b_sse4_1(BLOCK * b,BLOCKD * d)32 void vp8_regular_quantize_b_sse4_1(BLOCK *b, BLOCKD *d) {
33 char eob = 0;
34 short *zbin_boost_ptr = b->zrun_zbin_boost;
35
36 __m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1,
37 dqcoeff0, dqcoeff1;
38 __m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift));
39 __m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8));
40 __m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
41 __m128i z1 = _mm_load_si128((__m128i *)(b->coeff+8));
42 __m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra);
43 __m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin));
44 __m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8));
45 __m128i round0 = _mm_load_si128((__m128i *)(b->round));
46 __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
47 __m128i quant0 = _mm_load_si128((__m128i *)(b->quant));
48 __m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8));
49 __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
50 __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
51 __m128i qcoeff0 = _mm_setzero_si128();
52 __m128i qcoeff1 = _mm_setzero_si128();
53
54 /* Duplicate to all lanes. */
55 zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0);
56 zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra);
57
58 /* Sign of z: z >> 15 */
59 sz0 = _mm_srai_epi16(z0, 15);
60 sz1 = _mm_srai_epi16(z1, 15);
61
62 /* x = abs(z): (z ^ sz) - sz */
63 x0 = _mm_xor_si128(z0, sz0);
64 x1 = _mm_xor_si128(z1, sz1);
65 x0 = _mm_sub_epi16(x0, sz0);
66 x1 = _mm_sub_epi16(x1, sz1);
67
68 /* zbin[] + zbin_extra */
69 zbin0 = _mm_add_epi16(zbin0, zbin_extra);
70 zbin1 = _mm_add_epi16(zbin1, zbin_extra);
71
72 /* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance
73 * the equation because boost is the only value which can change:
74 * x - (zbin[] + extra) >= boost */
75 x_minus_zbin0 = _mm_sub_epi16(x0, zbin0);
76 x_minus_zbin1 = _mm_sub_epi16(x1, zbin1);
77
78 /* All the remaining calculations are valid whether they are done now with
79 * simd or later inside the loop one at a time. */
80 x0 = _mm_add_epi16(x0, round0);
81 x1 = _mm_add_epi16(x1, round1);
82
83 y0 = _mm_mulhi_epi16(x0, quant0);
84 y1 = _mm_mulhi_epi16(x1, quant1);
85
86 y0 = _mm_add_epi16(y0, x0);
87 y1 = _mm_add_epi16(y1, x1);
88
89 /* Instead of shifting each value independently we convert the scaling
90 * factor with 1 << (16 - shift) so we can use multiply/return high half. */
91 y0 = _mm_mulhi_epi16(y0, quant_shift0);
92 y1 = _mm_mulhi_epi16(y1, quant_shift1);
93
94 /* Return the sign: (y ^ sz) - sz */
95 y0 = _mm_xor_si128(y0, sz0);
96 y1 = _mm_xor_si128(y1, sz1);
97 y0 = _mm_sub_epi16(y0, sz0);
98 y1 = _mm_sub_epi16(y1, sz1);
99
100 /* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */
101 SELECT_EOB(1, 0, x_minus_zbin0, y0, qcoeff0);
102 SELECT_EOB(2, 1, x_minus_zbin0, y0, qcoeff0);
103 SELECT_EOB(3, 4, x_minus_zbin0, y0, qcoeff0);
104 SELECT_EOB(4, 0, x_minus_zbin1, y1, qcoeff1);
105 SELECT_EOB(5, 5, x_minus_zbin0, y0, qcoeff0);
106 SELECT_EOB(6, 2, x_minus_zbin0, y0, qcoeff0);
107 SELECT_EOB(7, 3, x_minus_zbin0, y0, qcoeff0);
108 SELECT_EOB(8, 6, x_minus_zbin0, y0, qcoeff0);
109 SELECT_EOB(9, 1, x_minus_zbin1, y1, qcoeff1);
110 SELECT_EOB(10, 4, x_minus_zbin1, y1, qcoeff1);
111 SELECT_EOB(11, 5, x_minus_zbin1, y1, qcoeff1);
112 SELECT_EOB(12, 2, x_minus_zbin1, y1, qcoeff1);
113 SELECT_EOB(13, 7, x_minus_zbin0, y0, qcoeff0);
114 SELECT_EOB(14, 3, x_minus_zbin1, y1, qcoeff1);
115 SELECT_EOB(15, 6, x_minus_zbin1, y1, qcoeff1);
116 SELECT_EOB(16, 7, x_minus_zbin1, y1, qcoeff1);
117
118 _mm_store_si128((__m128i *)(d->qcoeff), qcoeff0);
119 _mm_store_si128((__m128i *)(d->qcoeff + 8), qcoeff1);
120
121 dqcoeff0 = _mm_mullo_epi16(qcoeff0, dequant0);
122 dqcoeff1 = _mm_mullo_epi16(qcoeff1, dequant1);
123
124 _mm_store_si128((__m128i *)(d->dqcoeff), dqcoeff0);
125 _mm_store_si128((__m128i *)(d->dqcoeff + 8), dqcoeff1);
126
127 *d->eob = eob;
128 }
129