// 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.h" #if defined(WEBP_USE_MIPS_DSP_R2) #include #include "../utils/rescaler.h" static void ImportRowShrink(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) { int* frow = wrk->frow + channel; const uint8_t* src1 = src + channel; int temp3; int base, frac, sum; int accum, accum1; int loop_c = x_out_max; __asm__ volatile ( "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" "sll %[accum1], %[frac], 1 \n\t" "subu %[loop_c], %[loop_c], %[x_stride] \n\t" "mulq_rs.w %[sum], %[accum1], %[fx_scale] \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), [loop_c]"+&r"(loop_c) : [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub), [x_add] "r" (x_add), [x_stride1] "r" (x_stride1) : "memory", "hi", "lo" ); } } static void ImportRowExpand(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) { int* frow = wrk->frow + channel; const uint8_t* src1 = src + 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" ); } } static void ExportRowShrink(WebPRescaler* const wrk) { assert(!WebPRescalerOutputDone(wrk)); assert(wrk->y_accum <= 0); assert(!wrk->y_expand); // if wrk->fxy_scale can fit into 32 bits use optimized code, // otherwise use C code if ((wrk->fxy_scale >> 32) == 0) { 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); const int x_out_max = wrk->dst_width * wrk->num_channels; int temp0, temp1, temp3, temp4, temp5, temp6, temp7; const int temp2 = (int)wrk->fxy_scale; const int rest = x_out_max & 1; const rescaler_t* const loop_end = frow + x_out_max - rest; __asm__ volatile ( ".set push \n\t" ".set noreorder \n\t" "beq %[frow], %[loop_end], 1f \n\t" " nop \n\t" "0: \n\t" "lw %[temp0], 0(%[frow]) \n\t" "lw %[temp1], 0(%[irow]) \n\t" "lw %[temp3], 4(%[frow]) \n\t" "lw %[temp4], 4(%[irow]) \n\t" "sll %[temp0], %[temp0], 1 \n\t" "sll %[temp3], %[temp3], 1 \n\t" "mulq_rs.w %[temp5], %[temp0], %[yscale] \n\t" "mulq_rs.w %[temp6], %[temp3], %[yscale] \n\t" "addiu %[frow], %[frow], 8 \n\t" "addiu %[dst], %[dst], 2 \n\t" "addiu %[irow], %[irow], 8 \n\t" "subu %[temp1], %[temp1], %[temp5] \n\t" "subu %[temp4], %[temp4], %[temp6] \n\t" "sll %[temp1], %[temp1], 1 \n\t" "sll %[temp4], %[temp4], 1 \n\t" "mulq_rs.w %[temp0], %[temp1], %[temp2] \n\t" "mulq_rs.w %[temp3], %[temp4], %[temp2] \n\t" "sw %[temp5], -8(%[irow]) \n\t" "sw %[temp6], -4(%[irow]) \n\t" "shll_s.ph %[temp0], %[temp0], 7 \n\t" "shll_s.ph %[temp3], %[temp3], 7 \n\t" "precrqu_s.qb.ph %[temp0], %[temp0], %[temp3] \n\t" "sb %[temp0], -1(%[dst]) \n\t" "srl %[temp0], %[temp0], 16 \n\t" "bne %[frow], %[loop_end], 0b \n\t" " sb %[temp0], -2(%[dst]) \n\t" "1: \n\t" "beqz %[rest], 3f \n\t" " nop \n\t" "addiu %[temp6], $zero, -256 \n\t" "addiu %[temp7], $zero, 255 \n\t" "lw %[temp0], 0(%[frow]) \n\t" "sll %[temp0], %[temp0], 1 \n\t" "mulq_rs.w %[temp1], %[temp0], %[yscale] \n\t" "lw %[temp0], 0(%[irow]) \n\t" "subu %[temp0], %[temp0], %[temp1] \n\t" "sll %[temp0], %[temp0], 1 \n\t" "mulq_rs.w %[temp5], %[temp0], %[temp2] \n\t" "sw %[temp1], 0(%[irow]) \n\t" "and %[temp0], %[temp5], %[temp6] \n\t" "beqz %[temp0], 2f \n\t" " slti %[temp1], %[temp5], 0 \n\t" "xor %[temp5], %[temp5], %[temp5] \n\t" "movz %[temp5], %[temp7], %[temp1] \n\t" "2: \n\t" "sb %[temp5], 0(%[dst]) \n\t" "3: \n\t" ".set pop \n\t" : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6), [temp7]"=&r"(temp7), [frow]"+&r"(frow), [irow]"+&r"(irow), [dst]"+&r"(dst) : [temp2]"r"(temp2), [yscale]"r"(yscale), [loop_end]"r"(loop_end), [rest]"r"(rest) : "memory", "hi", "lo" ); } else { WebPRescalerExportRowShrinkC(wrk); } } // no ExportRowExpand yet. //------------------------------------------------------------------------------ // Entry point extern void WebPRescalerDspInitMIPSdspR2(void); WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) { WebPRescalerImportRowExpand = ImportRowExpand; WebPRescalerImportRowShrink = ImportRowShrink; WebPRescalerExportRowShrink = ExportRowShrink; } #else // !WEBP_USE_MIPS_DSP_R2 WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPSdspR2) #endif // WEBP_USE_MIPS_DSP_R2