1// Copyright 2014 Google Inc. All Rights Reserved. 2// 3// Use of this source code is governed by a BSD-style license 4// that can be found in the COPYING file in the root of the source 5// tree. An additional intellectual property rights grant can be found 6// in the file PATENTS. All contributing project authors may 7// be found in the AUTHORS file in the root of the source tree. 8// ----------------------------------------------------------------------------- 9// 10// MIPS version of rescaling functions 11// 12// Author(s): Djordje Pesut (djordje.pesut@imgtec.com) 13 14#include "./dsp.h" 15 16#if defined(WEBP_USE_MIPS_DSP_R2) 17 18#include <assert.h> 19#include "../utils/rescaler.h" 20 21#define ROUNDER (WEBP_RESCALER_ONE >> 1) 22#define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) 23 24//------------------------------------------------------------------------------ 25// Row export 26 27static void ExportRowShrink(WebPRescaler* const wrk) { 28 int i; 29 const int x_out_max = wrk->dst_width * wrk->num_channels; 30 uint8_t* dst = wrk->dst; 31 rescaler_t* irow = wrk->irow; 32 const rescaler_t* frow = wrk->frow; 33 const int yscale = wrk->fy_scale * (-wrk->y_accum); 34 int temp0, temp1, temp2, temp3, temp4, temp5, loop_end; 35 const int temp7 = (int)wrk->fxy_scale; 36 const int temp6 = (x_out_max & ~0x3) << 2; 37 assert(!WebPRescalerOutputDone(wrk)); 38 assert(wrk->y_accum <= 0); 39 assert(!wrk->y_expand); 40 assert(wrk->fxy_scale != 0); 41 if (yscale) { 42 if (x_out_max >= 4) { 43 int temp8, temp9, temp10, temp11; 44 __asm__ volatile ( 45 "li %[temp3], 0x10000 \n\t" 46 "li %[temp4], 0x8000 \n\t" 47 "addu %[loop_end], %[frow], %[temp6] \n\t" 48 "1: \n\t" 49 "lw %[temp0], 0(%[frow]) \n\t" 50 "lw %[temp1], 4(%[frow]) \n\t" 51 "lw %[temp2], 8(%[frow]) \n\t" 52 "lw %[temp5], 12(%[frow]) \n\t" 53 "mult $ac0, %[temp3], %[temp4] \n\t" 54 "maddu $ac0, %[temp0], %[yscale] \n\t" 55 "mult $ac1, %[temp3], %[temp4] \n\t" 56 "maddu $ac1, %[temp1], %[yscale] \n\t" 57 "mult $ac2, %[temp3], %[temp4] \n\t" 58 "maddu $ac2, %[temp2], %[yscale] \n\t" 59 "mult $ac3, %[temp3], %[temp4] \n\t" 60 "maddu $ac3, %[temp5], %[yscale] \n\t" 61 "addiu %[frow], %[frow], 16 \n\t" 62 "mfhi %[temp0], $ac0 \n\t" 63 "mfhi %[temp1], $ac1 \n\t" 64 "mfhi %[temp2], $ac2 \n\t" 65 "mfhi %[temp5], $ac3 \n\t" 66 "lw %[temp8], 0(%[irow]) \n\t" 67 "lw %[temp9], 4(%[irow]) \n\t" 68 "lw %[temp10], 8(%[irow]) \n\t" 69 "lw %[temp11], 12(%[irow]) \n\t" 70 "addiu %[dst], %[dst], 4 \n\t" 71 "addiu %[irow], %[irow], 16 \n\t" 72 "subu %[temp8], %[temp8], %[temp0] \n\t" 73 "subu %[temp9], %[temp9], %[temp1] \n\t" 74 "subu %[temp10], %[temp10], %[temp2] \n\t" 75 "subu %[temp11], %[temp11], %[temp5] \n\t" 76 "mult $ac0, %[temp3], %[temp4] \n\t" 77 "maddu $ac0, %[temp8], %[temp7] \n\t" 78 "mult $ac1, %[temp3], %[temp4] \n\t" 79 "maddu $ac1, %[temp9], %[temp7] \n\t" 80 "mult $ac2, %[temp3], %[temp4] \n\t" 81 "maddu $ac2, %[temp10], %[temp7] \n\t" 82 "mult $ac3, %[temp3], %[temp4] \n\t" 83 "maddu $ac3, %[temp11], %[temp7] \n\t" 84 "mfhi %[temp8], $ac0 \n\t" 85 "mfhi %[temp9], $ac1 \n\t" 86 "mfhi %[temp10], $ac2 \n\t" 87 "mfhi %[temp11], $ac3 \n\t" 88 "sw %[temp0], -16(%[irow]) \n\t" 89 "sw %[temp1], -12(%[irow]) \n\t" 90 "sw %[temp2], -8(%[irow]) \n\t" 91 "sw %[temp5], -4(%[irow]) \n\t" 92 "sb %[temp8], -4(%[dst]) \n\t" 93 "sb %[temp9], -3(%[dst]) \n\t" 94 "sb %[temp10], -2(%[dst]) \n\t" 95 "sb %[temp11], -1(%[dst]) \n\t" 96 "bne %[frow], %[loop_end], 1b \n\t" 97 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), 98 [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), 99 [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end), 100 [temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), 101 [temp11]"=&r"(temp11), [temp2]"=&r"(temp2) 102 : [temp7]"r"(temp7), [yscale]"r"(yscale), [temp6]"r"(temp6) 103 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", 104 "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" 105 ); 106 } 107 for (i = 0; i < (x_out_max & 0x3); ++i) { 108 const uint32_t frac = (uint32_t)MULT_FIX(*frow++, yscale); 109 const int v = (int)MULT_FIX(*irow - frac, wrk->fxy_scale); 110 assert(v >= 0 && v <= 255); 111 *dst++ = v; 112 *irow++ = frac; // new fractional start 113 } 114 } else { 115 if (x_out_max >= 4) { 116 __asm__ volatile ( 117 "li %[temp3], 0x10000 \n\t" 118 "li %[temp4], 0x8000 \n\t" 119 "addu %[loop_end], %[irow], %[temp6] \n\t" 120 "1: \n\t" 121 "lw %[temp0], 0(%[irow]) \n\t" 122 "lw %[temp1], 4(%[irow]) \n\t" 123 "lw %[temp2], 8(%[irow]) \n\t" 124 "lw %[temp5], 12(%[irow]) \n\t" 125 "addiu %[dst], %[dst], 4 \n\t" 126 "addiu %[irow], %[irow], 16 \n\t" 127 "mult $ac0, %[temp3], %[temp4] \n\t" 128 "maddu $ac0, %[temp0], %[temp7] \n\t" 129 "mult $ac1, %[temp3], %[temp4] \n\t" 130 "maddu $ac1, %[temp1], %[temp7] \n\t" 131 "mult $ac2, %[temp3], %[temp4] \n\t" 132 "maddu $ac2, %[temp2], %[temp7] \n\t" 133 "mult $ac3, %[temp3], %[temp4] \n\t" 134 "maddu $ac3, %[temp5], %[temp7] \n\t" 135 "mfhi %[temp0], $ac0 \n\t" 136 "mfhi %[temp1], $ac1 \n\t" 137 "mfhi %[temp2], $ac2 \n\t" 138 "mfhi %[temp5], $ac3 \n\t" 139 "sw $zero, -16(%[irow]) \n\t" 140 "sw $zero, -12(%[irow]) \n\t" 141 "sw $zero, -8(%[irow]) \n\t" 142 "sw $zero, -4(%[irow]) \n\t" 143 "sb %[temp0], -4(%[dst]) \n\t" 144 "sb %[temp1], -3(%[dst]) \n\t" 145 "sb %[temp2], -2(%[dst]) \n\t" 146 "sb %[temp5], -1(%[dst]) \n\t" 147 "bne %[irow], %[loop_end], 1b \n\t" 148 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), 149 [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [irow]"+r"(irow), 150 [dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2) 151 : [temp7]"r"(temp7), [temp6]"r"(temp6) 152 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", 153 "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" 154 ); 155 } 156 for (i = 0; i < (x_out_max & 0x3); ++i) { 157 const int v = (int)MULT_FIX(*irow, wrk->fxy_scale); 158 assert(v >= 0 && v <= 255); 159 *dst++ = v; 160 *irow++ = 0; 161 } 162 } 163} 164 165static void ExportRowExpand(WebPRescaler* const wrk) { 166 int i; 167 uint8_t* dst = wrk->dst; 168 rescaler_t* irow = wrk->irow; 169 const int x_out_max = wrk->dst_width * wrk->num_channels; 170 const rescaler_t* frow = wrk->frow; 171 int temp0, temp1, temp2, temp3, temp4, temp5, loop_end; 172 const int temp6 = (x_out_max & ~0x3) << 2; 173 const int temp7 = (int)wrk->fy_scale; 174 assert(!WebPRescalerOutputDone(wrk)); 175 assert(wrk->y_accum <= 0); 176 assert(wrk->y_expand); 177 assert(wrk->y_sub != 0); 178 if (wrk->y_accum == 0) { 179 if (x_out_max >= 4) { 180 __asm__ volatile ( 181 "li %[temp4], 0x10000 \n\t" 182 "li %[temp5], 0x8000 \n\t" 183 "addu %[loop_end], %[frow], %[temp6] \n\t" 184 "1: \n\t" 185 "lw %[temp0], 0(%[frow]) \n\t" 186 "lw %[temp1], 4(%[frow]) \n\t" 187 "lw %[temp2], 8(%[frow]) \n\t" 188 "lw %[temp3], 12(%[frow]) \n\t" 189 "addiu %[dst], %[dst], 4 \n\t" 190 "addiu %[frow], %[frow], 16 \n\t" 191 "mult $ac0, %[temp4], %[temp5] \n\t" 192 "maddu $ac0, %[temp0], %[temp7] \n\t" 193 "mult $ac1, %[temp4], %[temp5] \n\t" 194 "maddu $ac1, %[temp1], %[temp7] \n\t" 195 "mult $ac2, %[temp4], %[temp5] \n\t" 196 "maddu $ac2, %[temp2], %[temp7] \n\t" 197 "mult $ac3, %[temp4], %[temp5] \n\t" 198 "maddu $ac3, %[temp3], %[temp7] \n\t" 199 "mfhi %[temp0], $ac0 \n\t" 200 "mfhi %[temp1], $ac1 \n\t" 201 "mfhi %[temp2], $ac2 \n\t" 202 "mfhi %[temp3], $ac3 \n\t" 203 "sb %[temp0], -4(%[dst]) \n\t" 204 "sb %[temp1], -3(%[dst]) \n\t" 205 "sb %[temp2], -2(%[dst]) \n\t" 206 "sb %[temp3], -1(%[dst]) \n\t" 207 "bne %[frow], %[loop_end], 1b \n\t" 208 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), 209 [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), 210 [dst]"+r"(dst), [loop_end]"=&r"(loop_end), [temp2]"=&r"(temp2) 211 : [temp7]"r"(temp7), [temp6]"r"(temp6) 212 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", 213 "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" 214 ); 215 } 216 for (i = 0; i < (x_out_max & 0x3); ++i) { 217 const uint32_t J = *frow++; 218 const int v = (int)MULT_FIX(J, wrk->fy_scale); 219 assert(v >= 0 && v <= 255); 220 *dst++ = v; 221 } 222 } else { 223 const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub); 224 const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B); 225 if (x_out_max >= 4) { 226 int temp8, temp9, temp10, temp11; 227 __asm__ volatile ( 228 "li %[temp8], 0x10000 \n\t" 229 "li %[temp9], 0x8000 \n\t" 230 "addu %[loop_end], %[frow], %[temp6] \n\t" 231 "1: \n\t" 232 "lw %[temp0], 0(%[frow]) \n\t" 233 "lw %[temp1], 4(%[frow]) \n\t" 234 "lw %[temp2], 8(%[frow]) \n\t" 235 "lw %[temp3], 12(%[frow]) \n\t" 236 "lw %[temp4], 0(%[irow]) \n\t" 237 "lw %[temp5], 4(%[irow]) \n\t" 238 "lw %[temp10], 8(%[irow]) \n\t" 239 "lw %[temp11], 12(%[irow]) \n\t" 240 "addiu %[dst], %[dst], 4 \n\t" 241 "mult $ac0, %[temp8], %[temp9] \n\t" 242 "maddu $ac0, %[A], %[temp0] \n\t" 243 "maddu $ac0, %[B], %[temp4] \n\t" 244 "mult $ac1, %[temp8], %[temp9] \n\t" 245 "maddu $ac1, %[A], %[temp1] \n\t" 246 "maddu $ac1, %[B], %[temp5] \n\t" 247 "mult $ac2, %[temp8], %[temp9] \n\t" 248 "maddu $ac2, %[A], %[temp2] \n\t" 249 "maddu $ac2, %[B], %[temp10] \n\t" 250 "mult $ac3, %[temp8], %[temp9] \n\t" 251 "maddu $ac3, %[A], %[temp3] \n\t" 252 "maddu $ac3, %[B], %[temp11] \n\t" 253 "addiu %[frow], %[frow], 16 \n\t" 254 "addiu %[irow], %[irow], 16 \n\t" 255 "mfhi %[temp0], $ac0 \n\t" 256 "mfhi %[temp1], $ac1 \n\t" 257 "mfhi %[temp2], $ac2 \n\t" 258 "mfhi %[temp3], $ac3 \n\t" 259 "mult $ac0, %[temp8], %[temp9] \n\t" 260 "maddu $ac0, %[temp0], %[temp7] \n\t" 261 "mult $ac1, %[temp8], %[temp9] \n\t" 262 "maddu $ac1, %[temp1], %[temp7] \n\t" 263 "mult $ac2, %[temp8], %[temp9] \n\t" 264 "maddu $ac2, %[temp2], %[temp7] \n\t" 265 "mult $ac3, %[temp8], %[temp9] \n\t" 266 "maddu $ac3, %[temp3], %[temp7] \n\t" 267 "mfhi %[temp0], $ac0 \n\t" 268 "mfhi %[temp1], $ac1 \n\t" 269 "mfhi %[temp2], $ac2 \n\t" 270 "mfhi %[temp3], $ac3 \n\t" 271 "sb %[temp0], -4(%[dst]) \n\t" 272 "sb %[temp1], -3(%[dst]) \n\t" 273 "sb %[temp2], -2(%[dst]) \n\t" 274 "sb %[temp3], -1(%[dst]) \n\t" 275 "bne %[frow], %[loop_end], 1b \n\t" 276 : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3), 277 [temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [frow]"+r"(frow), 278 [irow]"+r"(irow), [dst]"+r"(dst), [loop_end]"=&r"(loop_end), 279 [temp8]"=&r"(temp8), [temp9]"=&r"(temp9), [temp10]"=&r"(temp10), 280 [temp11]"=&r"(temp11), [temp2]"=&r"(temp2) 281 : [temp7]"r"(temp7), [temp6]"r"(temp6), [A]"r"(A), [B]"r"(B) 282 : "memory", "hi", "lo", "$ac1hi", "$ac1lo", 283 "$ac2hi", "$ac2lo", "$ac3hi", "$ac3lo" 284 ); 285 } 286 for (i = 0; i < (x_out_max & 0x3); ++i) { 287 const uint64_t I = (uint64_t)A * *frow++ 288 + (uint64_t)B * *irow++; 289 const uint32_t J = (uint32_t)((I + ROUNDER) >> WEBP_RESCALER_RFIX); 290 const int v = (int)MULT_FIX(J, wrk->fy_scale); 291 assert(v >= 0 && v <= 255); 292 *dst++ = v; 293 } 294 } 295} 296 297#undef MULT_FIX 298#undef ROUNDER 299 300//------------------------------------------------------------------------------ 301// Entry point 302 303extern void WebPRescalerDspInitMIPSdspR2(void); 304 305WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) { 306 WebPRescalerExportRowExpand = ExportRowExpand; 307 WebPRescalerExportRowShrink = ExportRowShrink; 308} 309 310#else // !WEBP_USE_MIPS_DSP_R2 311 312WEBP_DSP_INIT_STUB(WebPRescalerDspInitMIPSdspR2) 313 314#endif // WEBP_USE_MIPS_DSP_R2 315