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-rw-r--r--media/libwebp/dsp/rescaler_mips32.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/media/libwebp/dsp/rescaler_mips32.c b/media/libwebp/dsp/rescaler_mips32.c
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+++ b/media/libwebp/dsp/rescaler_mips32.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.
+// -----------------------------------------------------------------------------
+//
+// MIPS version of rescaling functions
+//
+// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
+
+#include "../dsp/dsp.h"
+
+#if defined(WEBP_USE_MIPS32) && !defined(WEBP_REDUCE_SIZE)
+
+#include <assert.h>
+#include "../utils/rescaler_utils.h"
+
+//------------------------------------------------------------------------------
+// Row import
+
+static void ImportRowShrink_MIPS32(WebPRescaler* const wrk,
+ const uint8_t* src) {
+ const int x_stride = wrk->num_channels;
+ const int x_out_max = wrk->dst_width * wrk->num_channels;
+ const int fx_scale = wrk->fx_scale;
+ const int x_add = wrk->x_add;
+ const int x_sub = wrk->x_sub;
+ const int x_stride1 = x_stride << 2;
+ int channel;
+ assert(!wrk->x_expand);
+ assert(!WebPRescalerInputDone(wrk));
+
+ for (channel = 0; channel < x_stride; ++channel) {
+ const uint8_t* src1 = src + channel;
+ rescaler_t* frow = wrk->frow + channel;
+ int temp1, temp2, temp3;
+ int base, frac, sum;
+ int accum, accum1;
+ int loop_c = x_out_max - channel;
+
+ __asm__ volatile (
+ "li %[temp1], 0x8000 \n\t"
+ "li %[temp2], 0x10000 \n\t"
+ "li %[sum], 0 \n\t"
+ "li %[accum], 0 \n\t"
+ "1: \n\t"
+ "addu %[accum], %[accum], %[x_add] \n\t"
+ "li %[base], 0 \n\t"
+ "blez %[accum], 3f \n\t"
+ "2: \n\t"
+ "lbu %[base], 0(%[src1]) \n\t"
+ "subu %[accum], %[accum], %[x_sub] \n\t"
+ "addu %[src1], %[src1], %[x_stride] \n\t"
+ "addu %[sum], %[sum], %[base] \n\t"
+ "bgtz %[accum], 2b \n\t"
+ "3: \n\t"
+ "negu %[accum1], %[accum] \n\t"
+ "mul %[frac], %[base], %[accum1] \n\t"
+ "mul %[temp3], %[sum], %[x_sub] \n\t"
+ "subu %[loop_c], %[loop_c], %[x_stride] \n\t"
+ "mult %[temp1], %[temp2] \n\t"
+ "maddu %[frac], %[fx_scale] \n\t"
+ "mfhi %[sum] \n\t"
+ "subu %[temp3], %[temp3], %[frac] \n\t"
+ "sw %[temp3], 0(%[frow]) \n\t"
+ "addu %[frow], %[frow], %[x_stride1] \n\t"
+ "bgtz %[loop_c], 1b \n\t"
+ : [accum]"=&r"(accum), [src1]"+r"(src1), [temp3]"=&r"(temp3),
+ [sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
+ [frow]"+r"(frow), [accum1]"=&r"(accum1),
+ [temp2]"=&r"(temp2), [temp1]"=&r"(temp1)
+ : [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale),
+ [x_sub]"r"(x_sub), [x_add]"r"(x_add),
+ [loop_c]"r"(loop_c), [x_stride1]"r"(x_stride1)
+ : "memory", "hi", "lo"
+ );
+ assert(accum == 0);
+ }
+}
+
+static void ImportRowExpand_MIPS32(WebPRescaler* const wrk,
+ const uint8_t* src) {
+ const int x_stride = wrk->num_channels;
+ const int x_out_max = wrk->dst_width * wrk->num_channels;
+ const int x_add = wrk->x_add;
+ const int x_sub = wrk->x_sub;
+ const int src_width = wrk->src_width;
+ const int x_stride1 = x_stride << 2;
+ int channel;
+ assert(wrk->x_expand);
+ assert(!WebPRescalerInputDone(wrk));
+
+ for (channel = 0; channel < x_stride; ++channel) {
+ const uint8_t* src1 = src + channel;
+ rescaler_t* frow = wrk->frow + channel;
+ int temp1, temp2, temp3, temp4;
+ int frac;
+ int accum;
+ int x_out = channel;
+
+ __asm__ volatile (
+ "addiu %[temp3], %[src_width], -1 \n\t"
+ "lbu %[temp2], 0(%[src1]) \n\t"
+ "addu %[src1], %[src1], %[x_stride] \n\t"
+ "bgtz %[temp3], 0f \n\t"
+ "addiu %[temp1], %[temp2], 0 \n\t"
+ "b 3f \n\t"
+ "0: \n\t"
+ "lbu %[temp1], 0(%[src1]) \n\t"
+ "3: \n\t"
+ "addiu %[accum], %[x_add], 0 \n\t"
+ "1: \n\t"
+ "subu %[temp3], %[temp2], %[temp1] \n\t"
+ "mul %[temp3], %[temp3], %[accum] \n\t"
+ "mul %[temp4], %[temp1], %[x_add] \n\t"
+ "addu %[temp3], %[temp4], %[temp3] \n\t"
+ "sw %[temp3], 0(%[frow]) \n\t"
+ "addu %[frow], %[frow], %[x_stride1] \n\t"
+ "addu %[x_out], %[x_out], %[x_stride] \n\t"
+ "subu %[temp3], %[x_out], %[x_out_max] \n\t"
+ "bgez %[temp3], 2f \n\t"
+ "subu %[accum], %[accum], %[x_sub] \n\t"
+ "bgez %[accum], 4f \n\t"
+ "addiu %[temp2], %[temp1], 0 \n\t"
+ "addu %[src1], %[src1], %[x_stride] \n\t"
+ "lbu %[temp1], 0(%[src1]) \n\t"
+ "addu %[accum], %[accum], %[x_add] \n\t"
+ "4: \n\t"
+ "b 1b \n\t"
+ "2: \n\t"
+ : [src1]"+r"(src1), [accum]"=&r"(accum), [temp1]"=&r"(temp1),
+ [temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4),
+ [x_out]"+r"(x_out), [frac]"=&r"(frac), [frow]"+r"(frow)
+ : [x_stride]"r"(x_stride), [x_add]"r"(x_add), [x_sub]"r"(x_sub),
+ [x_stride1]"r"(x_stride1), [src_width]"r"(src_width),
+ [x_out_max]"r"(x_out_max)
+ : "memory", "hi", "lo"
+ );
+ assert(wrk->x_sub == 0 /* <- special case for src_width=1 */ || accum == 0);
+ }
+}
+
+//------------------------------------------------------------------------------
+// Row export
+
+static void ExportRowExpand_MIPS32(WebPRescaler* const wrk) {
+ uint8_t* dst = wrk->dst;
+ rescaler_t* irow = wrk->irow;
+ const int x_out_max = wrk->dst_width * wrk->num_channels;
+ const rescaler_t* frow = wrk->frow;
+ int temp0, temp1, temp3, temp4, temp5, loop_end;
+ const int temp2 = (int)wrk->fy_scale;
+ const int temp6 = x_out_max << 2;
+ assert(!WebPRescalerOutputDone(wrk));
+ assert(wrk->y_accum <= 0);
+ assert(wrk->y_expand);
+ assert(wrk->y_sub != 0);
+ if (wrk->y_accum == 0) {
+ __asm__ volatile (
+ "li %[temp3], 0x10000 \n\t"
+ "li %[temp4], 0x8000 \n\t"
+ "addu %[loop_end], %[frow], %[temp6] \n\t"
+ "1: \n\t"
+ "lw %[temp0], 0(%[frow]) \n\t"
+ "addiu %[dst], %[dst], 1 \n\t"
+ "addiu %[frow], %[frow], 4 \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "maddu %[temp0], %[temp2] \n\t"
+ "mfhi %[temp5] \n\t"
+ "sb %[temp5], -1(%[dst]) \n\t"
+ "bne %[frow], %[loop_end], 1b \n\t"
+ : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
+ [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
+ [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
+ : [temp2]"r"(temp2), [temp6]"r"(temp6)
+ : "memory", "hi", "lo"
+ );
+ } else {
+ const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub);
+ const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
+ __asm__ volatile (
+ "li %[temp3], 0x10000 \n\t"
+ "li %[temp4], 0x8000 \n\t"
+ "addu %[loop_end], %[frow], %[temp6] \n\t"
+ "1: \n\t"
+ "lw %[temp0], 0(%[frow]) \n\t"
+ "lw %[temp1], 0(%[irow]) \n\t"
+ "addiu %[dst], %[dst], 1 \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "maddu %[A], %[temp0] \n\t"
+ "maddu %[B], %[temp1] \n\t"
+ "addiu %[frow], %[frow], 4 \n\t"
+ "addiu %[irow], %[irow], 4 \n\t"
+ "mfhi %[temp5] \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "maddu %[temp5], %[temp2] \n\t"
+ "mfhi %[temp5] \n\t"
+ "sb %[temp5], -1(%[dst]) \n\t"
+ "bne %[frow], %[loop_end], 1b \n\t"
+ : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
+ [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
+ [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
+ : [temp2]"r"(temp2), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B)
+ : "memory", "hi", "lo"
+ );
+ }
+}
+
+#if 0 // disabled for now. TODO(skal): make match the C-code
+static void ExportRowShrink_MIPS32(WebPRescaler* const wrk) {
+ const int x_out_max = wrk->dst_width * wrk->num_channels;
+ uint8_t* dst = wrk->dst;
+ rescaler_t* irow = wrk->irow;
+ const rescaler_t* frow = wrk->frow;
+ const int yscale = wrk->fy_scale * (-wrk->y_accum);
+ int temp0, temp1, temp3, temp4, temp5, loop_end;
+ const int temp2 = (int)wrk->fxy_scale;
+ const int temp6 = x_out_max << 2;
+
+ assert(!WebPRescalerOutputDone(wrk));
+ assert(wrk->y_accum <= 0);
+ assert(!wrk->y_expand);
+ assert(wrk->fxy_scale != 0);
+ if (yscale) {
+ __asm__ volatile (
+ "li %[temp3], 0x10000 \n\t"
+ "li %[temp4], 0x8000 \n\t"
+ "addu %[loop_end], %[frow], %[temp6] \n\t"
+ "1: \n\t"
+ "lw %[temp0], 0(%[frow]) \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "addiu %[frow], %[frow], 4 \n\t"
+ "maddu %[temp0], %[yscale] \n\t"
+ "mfhi %[temp1] \n\t"
+ "lw %[temp0], 0(%[irow]) \n\t"
+ "addiu %[dst], %[dst], 1 \n\t"
+ "addiu %[irow], %[irow], 4 \n\t"
+ "subu %[temp0], %[temp0], %[temp1] \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "maddu %[temp0], %[temp2] \n\t"
+ "mfhi %[temp5] \n\t"
+ "sw %[temp1], -4(%[irow]) \n\t"
+ "sb %[temp5], -1(%[dst]) \n\t"
+ "bne %[frow], %[loop_end], 1b \n\t"
+ : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
+ [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow),
+ [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
+ : [temp2]"r"(temp2), [yscale]"r"(yscale), [temp6]"r"(temp6)
+ : "memory", "hi", "lo"
+ );
+ } else {
+ __asm__ volatile (
+ "li %[temp3], 0x10000 \n\t"
+ "li %[temp4], 0x8000 \n\t"
+ "addu %[loop_end], %[irow], %[temp6] \n\t"
+ "1: \n\t"
+ "lw %[temp0], 0(%[irow]) \n\t"
+ "addiu %[dst], %[dst], 1 \n\t"
+ "addiu %[irow], %[irow], 4 \n\t"
+ "mult %[temp3], %[temp4] \n\t"
+ "maddu %[temp0], %[temp2] \n\t"
+ "mfhi %[temp5] \n\t"
+ "sw $zero, -4(%[irow]) \n\t"
+ "sb %[temp5], -1(%[dst]) \n\t"
+ "bne %[irow], %[loop_end], 1b \n\t"
+ : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
+ [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [irow]"+r"(irow),
+ [dst]"+r"(dst), [loop_end]"=&r"(loop_end)
+ : [temp2]"r"(temp2), [temp6]"r"(temp6)
+ : "memory", "hi", "lo"
+ );
+ }
+}
+#endif // 0
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void WebPRescalerDspInitMIPS32(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
+ WebPRescalerImportRowExpand = ImportRowExpand_MIPS32;
+ WebPRescalerImportRowShrink = ImportRowShrink_MIPS32;
+ WebPRescalerExportRowExpand = ExportRowExpand_MIPS32;
+// WebPRescalerExportRowShrink = ExportRowShrink_MIPS32;
+}
+
+#else // !WEBP_USE_MIPS32
+
+WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPS32)
+
+#endif // WEBP_USE_MIPS32
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