diff options
Diffstat (limited to 'media/libwebp/src/dsp/rescaler_mips32.c')
-rw-r--r-- | media/libwebp/src/dsp/rescaler_mips32.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/media/libwebp/src/dsp/rescaler_mips32.c b/media/libwebp/src/dsp/rescaler_mips32.c new file mode 100644 index 0000000000..61f63c616c --- /dev/null +++ b/media/libwebp/src/dsp/rescaler_mips32.c @@ -0,0 +1,295 @@ +// 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 "src/dsp/dsp.h" + +#if defined(WEBP_USE_MIPS32) && !defined(WEBP_REDUCE_SIZE) + +#include <assert.h> +#include "src/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 |