1 | // Copyright 2014 Google Inc. All Rights Reserved. |
2 | // |
3 | // Use of this source code is governed by a BSD-style license |
4 | // that can be found in the COPYING file in the root of the source |
5 | // tree. An additional intellectual property rights grant can be found |
6 | // in the file PATENTS. All contributing project authors may |
7 | // be found in the AUTHORS file in the root of the source tree. |
8 | // ----------------------------------------------------------------------------- |
9 | // |
10 | // Author: Djordje Pesut (djordje.pesut@imgtec.com) |
11 | |
12 | #include "src/dsp/dsp.h" |
13 | |
14 | #if defined(WEBP_USE_MIPS_DSP_R2) |
15 | |
16 | #include "src/enc/cost_enc.h" |
17 | |
18 | static int GetResidualCost_MIPSdspR2(int ctx0, const VP8Residual* const res) { |
19 | int temp0, temp1; |
20 | int v_reg, ctx_reg; |
21 | int n = res->first; |
22 | // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 |
23 | int p0 = res->prob[n][ctx0][0]; |
24 | CostArrayPtr const costs = res->costs; |
25 | const uint16_t* t = costs[n][ctx0]; |
26 | // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 |
27 | // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll |
28 | // be missing during the loop. |
29 | int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; |
30 | const int16_t* res_coeffs = res->coeffs; |
31 | const int res_last = res->last; |
32 | const int const_max_level = MAX_VARIABLE_LEVEL; |
33 | const int const_2 = 2; |
34 | const uint16_t** p_costs = &costs[n][0]; |
35 | const size_t inc_p_costs = NUM_CTX * sizeof(*p_costs); |
36 | |
37 | if (res->last < 0) { |
38 | return VP8BitCost(0, p0); |
39 | } |
40 | |
41 | __asm__ volatile ( |
42 | ".set push \n\t" |
43 | ".set noreorder \n\t" |
44 | "subu %[temp1], %[res_last], %[n] \n\t" |
45 | "blez %[temp1], 2f \n\t" |
46 | " nop \n\t" |
47 | "1: \n\t" |
48 | "sll %[temp0], %[n], 1 \n\t" |
49 | "lhx %[v_reg], %[temp0](%[res_coeffs]) \n\t" |
50 | "addiu %[n], %[n], 1 \n\t" |
51 | "absq_s.w %[v_reg], %[v_reg] \n\t" |
52 | "sltiu %[temp0], %[v_reg], 2 \n\t" |
53 | "move %[ctx_reg], %[v_reg] \n\t" |
54 | "movz %[ctx_reg], %[const_2], %[temp0] \n\t" |
55 | "sll %[temp1], %[v_reg], 1 \n\t" |
56 | "lhx %[temp1], %[temp1](%[VP8LevelFixedCosts]) \n\t" |
57 | "slt %[temp0], %[v_reg], %[const_max_level] \n\t" |
58 | "movz %[v_reg], %[const_max_level], %[temp0] \n\t" |
59 | "addu %[cost], %[cost], %[temp1] \n\t" |
60 | "sll %[v_reg], %[v_reg], 1 \n\t" |
61 | "sll %[ctx_reg], %[ctx_reg], 2 \n\t" |
62 | "lhx %[temp0], %[v_reg](%[t]) \n\t" |
63 | "addu %[p_costs], %[p_costs], %[inc_p_costs] \n\t" |
64 | "addu %[t], %[p_costs], %[ctx_reg] \n\t" |
65 | "addu %[cost], %[cost], %[temp0] \n\t" |
66 | "bne %[n], %[res_last], 1b \n\t" |
67 | " lw %[t], 0(%[t]) \n\t" |
68 | "2: \n\t" |
69 | ".set pop \n\t" |
70 | : [cost]"+&r" (cost), [t]"+&r" (t), [n]"+&r" (n), [v_reg]"=&r" (v_reg), |
71 | [ctx_reg]"=&r" (ctx_reg), [p_costs]"+&r" (p_costs), [temp0]"=&r" (temp0), |
72 | [temp1]"=&r" (temp1) |
73 | : [const_2]"r" (const_2), [const_max_level]"r" (const_max_level), |
74 | [VP8LevelFixedCosts]"r" (VP8LevelFixedCosts), [res_last]"r" (res_last), |
75 | [res_coeffs]"r" (res_coeffs), [inc_p_costs]"r" (inc_p_costs) |
76 | : "memory" |
77 | ); |
78 | |
79 | // Last coefficient is always non-zero |
80 | { |
81 | const int v = abs(res->coeffs[n]); |
82 | assert(v != 0); |
83 | cost += VP8LevelCost(t, v); |
84 | if (n < 15) { |
85 | const int b = VP8EncBands[n + 1]; |
86 | const int ctx = (v == 1) ? 1 : 2; |
87 | const int last_p0 = res->prob[b][ctx][0]; |
88 | cost += VP8BitCost(0, last_p0); |
89 | } |
90 | } |
91 | return cost; |
92 | } |
93 | |
94 | //------------------------------------------------------------------------------ |
95 | // Entry point |
96 | |
97 | extern void VP8EncDspCostInitMIPSdspR2(void); |
98 | |
99 | WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPSdspR2(void) { |
100 | VP8GetResidualCost = GetResidualCost_MIPSdspR2; |
101 | } |
102 | |
103 | #else // !WEBP_USE_MIPS_DSP_R2 |
104 | |
105 | WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPSdspR2) |
106 | |
107 | #endif // WEBP_USE_MIPS_DSP_R2 |
108 | |