| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Use of this source code is governed by a BSD-style license |
| // that can be found in the COPYING 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. |
| // ----------------------------------------------------------------------------- |
| // |
| // Author: Djordje Pesut (djordje.pesut@imgtec.com) |
| |
| #include "./dsp.h" |
| |
| #if defined(WEBP_USE_MIPS32) |
| |
| #include "../enc/cost.h" |
| |
| static int GetResidualCost(int ctx0, const VP8Residual* const res) { |
| int temp0, temp1; |
| int v_reg, ctx_reg; |
| int n = res->first; |
| // should be prob[VP8EncBands[n]], but it's equivalent for n=0 or 1 |
| int p0 = res->prob[n][ctx0][0]; |
| CostArrayPtr const costs = res->costs; |
| const uint16_t* t = costs[n][ctx0]; |
| // bit_cost(1, p0) is already incorporated in t[] tables, but only if ctx != 0 |
| // (as required by the syntax). For ctx0 == 0, we need to add it here or it'll |
| // be missing during the loop. |
| int cost = (ctx0 == 0) ? VP8BitCost(1, p0) : 0; |
| const int16_t* res_coeffs = res->coeffs; |
| const int res_last = res->last; |
| const int const_max_level = MAX_VARIABLE_LEVEL; |
| const int const_2 = 2; |
| const uint16_t** p_costs = &costs[n][0]; |
| const size_t inc_p_costs = NUM_CTX * sizeof(*p_costs); |
| |
| if (res->last < 0) { |
| return VP8BitCost(0, p0); |
| } |
| |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "subu %[temp1], %[res_last], %[n] \n\t" |
| "sll %[temp0], %[n], 1 \n\t" |
| "blez %[temp1], 2f \n\t" |
| " addu %[res_coeffs], %[res_coeffs], %[temp0] \n\t" |
| "1: \n\t" |
| "lh %[v_reg], 0(%[res_coeffs]) \n\t" |
| "addiu %[n], %[n], 1 \n\t" |
| "negu %[temp0], %[v_reg] \n\t" |
| "slti %[temp1], %[v_reg], 0 \n\t" |
| "movn %[v_reg], %[temp0], %[temp1] \n\t" |
| "sltiu %[temp0], %[v_reg], 2 \n\t" |
| "move %[ctx_reg], %[v_reg] \n\t" |
| "movz %[ctx_reg], %[const_2], %[temp0] \n\t" |
| "sll %[temp1], %[v_reg], 1 \n\t" |
| "addu %[temp1], %[temp1], %[VP8LevelFixedCosts] \n\t" |
| "lhu %[temp1], 0(%[temp1]) \n\t" |
| "slt %[temp0], %[v_reg], %[const_max_level] \n\t" |
| "movz %[v_reg], %[const_max_level], %[temp0] \n\t" |
| "addu %[cost], %[cost], %[temp1] \n\t" |
| "sll %[v_reg], %[v_reg], 1 \n\t" |
| "sll %[ctx_reg], %[ctx_reg], 2 \n\t" |
| "addu %[v_reg], %[v_reg], %[t] \n\t" |
| "lhu %[temp0], 0(%[v_reg]) \n\t" |
| "addu %[p_costs], %[p_costs], %[inc_p_costs] \n\t" |
| "addu %[t], %[p_costs], %[ctx_reg] \n\t" |
| "addu %[cost], %[cost], %[temp0] \n\t" |
| "addiu %[res_coeffs], %[res_coeffs], 2 \n\t" |
| "bne %[n], %[res_last], 1b \n\t" |
| " lw %[t], 0(%[t]) \n\t" |
| "2: \n\t" |
| ".set pop \n\t" |
| : [cost]"+&r"(cost), [t]"+&r"(t), [n]"+&r"(n), [v_reg]"=&r"(v_reg), |
| [ctx_reg]"=&r"(ctx_reg), [p_costs]"+&r"(p_costs), [temp0]"=&r"(temp0), |
| [temp1]"=&r"(temp1), [res_coeffs]"+&r"(res_coeffs) |
| : [const_2]"r"(const_2), [const_max_level]"r"(const_max_level), |
| [VP8LevelFixedCosts]"r"(VP8LevelFixedCosts), [res_last]"r"(res_last), |
| [inc_p_costs]"r"(inc_p_costs) |
| : "memory" |
| ); |
| |
| // Last coefficient is always non-zero |
| { |
| const int v = abs(res->coeffs[n]); |
| assert(v != 0); |
| cost += VP8LevelCost(t, v); |
| if (n < 15) { |
| const int b = VP8EncBands[n + 1]; |
| const int ctx = (v == 1) ? 1 : 2; |
| const int last_p0 = res->prob[b][ctx][0]; |
| cost += VP8BitCost(0, last_p0); |
| } |
| } |
| return cost; |
| } |
| |
| static void SetResidualCoeffs(const int16_t* const coeffs, |
| VP8Residual* const res) { |
| const int16_t* p_coeffs = (int16_t*)coeffs; |
| int temp0, temp1, temp2, n, n1; |
| assert(res->first == 0 || coeffs[0] == 0); |
| |
| __asm__ volatile ( |
| ".set push \n\t" |
| ".set noreorder \n\t" |
| "addiu %[p_coeffs], %[p_coeffs], 28 \n\t" |
| "li %[n], 15 \n\t" |
| "li %[temp2], -1 \n\t" |
| "0: \n\t" |
| "ulw %[temp0], 0(%[p_coeffs]) \n\t" |
| "beqz %[temp0], 1f \n\t" |
| #if defined(WORDS_BIGENDIAN) |
| " sll %[temp1], %[temp0], 16 \n\t" |
| #else |
| " srl %[temp1], %[temp0], 16 \n\t" |
| #endif |
| "addiu %[n1], %[n], -1 \n\t" |
| "movz %[temp0], %[n1], %[temp1] \n\t" |
| "movn %[temp0], %[n], %[temp1] \n\t" |
| "j 2f \n\t" |
| " addiu %[temp2], %[temp0], 0 \n\t" |
| "1: \n\t" |
| "addiu %[n], %[n], -2 \n\t" |
| "bgtz %[n], 0b \n\t" |
| " addiu %[p_coeffs], %[p_coeffs], -4 \n\t" |
| "2: \n\t" |
| ".set pop \n\t" |
| : [p_coeffs]"+&r"(p_coeffs), [temp0]"=&r"(temp0), |
| [temp1]"=&r"(temp1), [temp2]"=&r"(temp2), |
| [n]"=&r"(n), [n1]"=&r"(n1) |
| : |
| : "memory" |
| ); |
| res->last = temp2; |
| res->coeffs = coeffs; |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Entry point |
| |
| extern void VP8EncDspCostInitMIPS32(void); |
| |
| WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPS32(void) { |
| VP8GetResidualCost = GetResidualCost; |
| VP8SetResidualCoeffs = SetResidualCoeffs; |
| } |
| |
| #else // !WEBP_USE_MIPS32 |
| |
| WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPS32) |
| |
| #endif // WEBP_USE_MIPS32 |
