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-rw-r--r--media/libwebp/src/dsp/cost_mips_dsp_r2.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/media/libwebp/src/dsp/cost_mips_dsp_r2.c b/media/libwebp/src/dsp/cost_mips_dsp_r2.c
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+++ b/media/libwebp/src/dsp/cost_mips_dsp_r2.c
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+// 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 "src/dsp/dsp.h"
+
+#if defined(WEBP_USE_MIPS_DSP_R2)
+
+#include "src/enc/cost_enc.h"
+
+static int GetResidualCost_MIPSdspR2(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"
+ "blez %[temp1], 2f \n\t"
+ " nop \n\t"
+ "1: \n\t"
+ "sll %[temp0], %[n], 1 \n\t"
+ "lhx %[v_reg], %[temp0](%[res_coeffs]) \n\t"
+ "addiu %[n], %[n], 1 \n\t"
+ "absq_s.w %[v_reg], %[v_reg] \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"
+ "lhx %[temp1], %[temp1](%[VP8LevelFixedCosts]) \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"
+ "lhx %[temp0], %[v_reg](%[t]) \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"
+ "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)
+ : [const_2]"r"(const_2), [const_max_level]"r"(const_max_level),
+ [VP8LevelFixedCosts]"r"(VP8LevelFixedCosts), [res_last]"r"(res_last),
+ [res_coeffs]"r"(res_coeffs), [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;
+}
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void VP8EncDspCostInitMIPSdspR2(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspCostInitMIPSdspR2(void) {
+ VP8GetResidualCost = GetResidualCost_MIPSdspR2;
+}
+
+#else // !WEBP_USE_MIPS_DSP_R2
+
+WEBP_DSP_INIT_STUB(VP8EncDspCostInitMIPSdspR2)
+
+#endif // WEBP_USE_MIPS_DSP_R2