// 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 ([email protected]) #include "src/dsp/dsp.h" #if defined(WEBP_USE_MIPS32) #include "src/enc/cost_enc.h" static int GetResidualCost_MIPS32(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_MIPS32(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_MIPS32; VP8SetResidualCoeffs = SetResidualCoeffs_MIPS32; } #else // !WEBP_USE_MIPS32 WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPS32) #endif // WEBP_USE_MIPS32
Codebase Browser
godot