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 #include <smmintrin.h> /* SSE4.1 */
12
13 #include "./vp8_rtcd.h"
14 #include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */
15 #include "vp8/encoder/block.h"
16
17 #define SELECT_EOB(i, z, x, y, q) \
18 do { \
19 short boost = *zbin_boost_ptr; \
20 /* Technically _mm_extract_epi16() returns an int: */ \
21 /* https://bugs.llvm.org/show_bug.cgi?id=41657 */ \
22 short x_z = (short)_mm_extract_epi16(x, z); \
23 short y_z = (short)_mm_extract_epi16(y, z); \
24 int cmp = (x_z < boost) | (y_z == 0); \
25 zbin_boost_ptr++; \
26 if (cmp) 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 x0, x1, y0, y1, x_minus_zbin0, x_minus_zbin1, dqcoeff0, dqcoeff1;
37 __m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift));
38 __m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8));
39 __m128i z0 = _mm_load_si128((__m128i *)(b->coeff));
40 __m128i z1 = _mm_load_si128((__m128i *)(b->coeff + 8));
41 __m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra);
42 __m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin));
43 __m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8));
44 __m128i round0 = _mm_load_si128((__m128i *)(b->round));
45 __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8));
46 __m128i quant0 = _mm_load_si128((__m128i *)(b->quant));
47 __m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8));
48 __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant));
49 __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8));
50 __m128i qcoeff0 = _mm_setzero_si128();
51 __m128i qcoeff1 = _mm_setzero_si128();
52
53 /* Duplicate to all lanes. */
54 zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0);
55 zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra);
56
57 /* x = abs(z) */
58 x0 = _mm_abs_epi16(z0);
59 x1 = _mm_abs_epi16(z1);
60
61 /* zbin[] + zbin_extra */
62 zbin0 = _mm_add_epi16(zbin0, zbin_extra);
63 zbin1 = _mm_add_epi16(zbin1, zbin_extra);
64
65 /* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance
66 * the equation because boost is the only value which can change:
67 * x - (zbin[] + extra) >= boost */
68 x_minus_zbin0 = _mm_sub_epi16(x0, zbin0);
69 x_minus_zbin1 = _mm_sub_epi16(x1, zbin1);
70
71 /* All the remaining calculations are valid whether they are done now with
72 * simd or later inside the loop one at a time. */
73 x0 = _mm_add_epi16(x0, round0);
74 x1 = _mm_add_epi16(x1, round1);
75
76 y0 = _mm_mulhi_epi16(x0, quant0);
77 y1 = _mm_mulhi_epi16(x1, quant1);
78
79 y0 = _mm_add_epi16(y0, x0);
80 y1 = _mm_add_epi16(y1, x1);
81
82 /* Instead of shifting each value independently we convert the scaling
83 * factor with 1 << (16 - shift) so we can use multiply/return high half. */
84 y0 = _mm_mulhi_epi16(y0, quant_shift0);
85 y1 = _mm_mulhi_epi16(y1, quant_shift1);
86
87 /* Restore the sign. */
88 y0 = _mm_sign_epi16(y0, z0);
89 y1 = _mm_sign_epi16(y1, z1);
90
91 /* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */
92 SELECT_EOB(1, 0, x_minus_zbin0, y0, qcoeff0);
93 SELECT_EOB(2, 1, x_minus_zbin0, y0, qcoeff0);
94 SELECT_EOB(3, 4, x_minus_zbin0, y0, qcoeff0);
95 SELECT_EOB(4, 0, x_minus_zbin1, y1, qcoeff1);
96 SELECT_EOB(5, 5, x_minus_zbin0, y0, qcoeff0);
97 SELECT_EOB(6, 2, x_minus_zbin0, y0, qcoeff0);
98 SELECT_EOB(7, 3, x_minus_zbin0, y0, qcoeff0);
99 SELECT_EOB(8, 6, x_minus_zbin0, y0, qcoeff0);
100 SELECT_EOB(9, 1, x_minus_zbin1, y1, qcoeff1);
101 SELECT_EOB(10, 4, x_minus_zbin1, y1, qcoeff1);
102 SELECT_EOB(11, 5, x_minus_zbin1, y1, qcoeff1);
103 SELECT_EOB(12, 2, x_minus_zbin1, y1, qcoeff1);
104 SELECT_EOB(13, 7, x_minus_zbin0, y0, qcoeff0);
105 SELECT_EOB(14, 3, x_minus_zbin1, y1, qcoeff1);
106 SELECT_EOB(15, 6, x_minus_zbin1, y1, qcoeff1);
107 SELECT_EOB(16, 7, x_minus_zbin1, y1, qcoeff1);
108
109 _mm_store_si128((__m128i *)(d->qcoeff), qcoeff0);
110 _mm_store_si128((__m128i *)(d->qcoeff + 8), qcoeff1);
111
112 dqcoeff0 = _mm_mullo_epi16(qcoeff0, dequant0);
113 dqcoeff1 = _mm_mullo_epi16(qcoeff1, dequant1);
114
115 _mm_store_si128((__m128i *)(d->dqcoeff), dqcoeff0);
116 _mm_store_si128((__m128i *)(d->dqcoeff + 8), dqcoeff1);
117
118 *d->eob = eob;
119 }
120