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/third_party/libwebp/src/dsp/alpha_processing_mips_dsp_r2.c

https://github.com/chromium/chromium
C | 228 lines | 196 code | 17 blank | 15 comment | 8 complexity | 791020227c608a3182f3a681610eeef3 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, Apache-2.0, BSD-3-Clause 
    

  1. // Copyright 2014 Google Inc. All Rights Reserved.
    2. 

  2. //
    3. 

  3. // Use of this source code is governed by a BSD-style license
    4. 

  4. // that can be found in the COPYING file in the root of the source
    5. 

  5. // tree. An additional intellectual property rights grant can be found
    6. 

  6. // in the file PATENTS. All contributing project authors may
    7. 

  7. // be found in the AUTHORS file in the root of the source tree.
    8. 

  8. // -----------------------------------------------------------------------------
    9. 

  9. //
    10. 

  10. // Utilities for processing transparent channel.
    11. 

  11. //
    12. 

  12. // Author(s): Branimir Vasic (branimir.vasic@imgtec.com)
    13. 

  13. //            Djordje Pesut  (djordje.pesut@imgtec.com)
    14. 

  14. 

  15. #include "src/dsp/dsp.h"
    16. 

  16. 

  17. #if defined(WEBP_USE_MIPS_DSP_R2)
    18. 

  18. 

  19. static int DispatchAlpha_MIPSdspR2(const uint8_t* alpha, int alpha_stride,
    20. 

  20.                                    int width, int height,
    21. 

  21.                                    uint8_t* dst, int dst_stride) {
    22. 

  22.   uint32_t alpha_mask = 0xffffffff;
    23. 

  23.   int i, j, temp0;
    24. 

  24. 

  25.   for (j = 0; j < height; ++j) {
    26. 

  26.     uint8_t* pdst = dst;
    27. 

  27.     const uint8_t* palpha = alpha;
    28. 

  28.     for (i = 0; i < (width >> 2); ++i) {
    29. 

  29.       int temp1, temp2, temp3;
    30. 

  30. 

  31.       __asm__ volatile (
    32. 

  32.         "ulw    %[temp0],      0(%[palpha])                \n\t"
    33. 

  33.         "addiu  %[palpha],     %[palpha],     4            \n\t"
    34. 

  34.         "addiu  %[pdst],       %[pdst],       16           \n\t"
    35. 

  35.         "srl    %[temp1],      %[temp0],      8            \n\t"
    36. 

  36.         "srl    %[temp2],      %[temp0],      16           \n\t"
    37. 

  37.         "srl    %[temp3],      %[temp0],      24           \n\t"
    38. 

  38.         "and    %[alpha_mask], %[alpha_mask], %[temp0]     \n\t"
    39. 

  39.         "sb     %[temp0],      -16(%[pdst])                \n\t"
    40. 

  40.         "sb     %[temp1],      -12(%[pdst])                \n\t"
    41. 

  41.         "sb     %[temp2],      -8(%[pdst])                 \n\t"
    42. 

  42.         "sb     %[temp3],      -4(%[pdst])                 \n\t"
    43. 

  43.         : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
    44. 

  44.           [temp3]"=&r"(temp3), [palpha]"+r"(palpha), [pdst]"+r"(pdst),
    45. 

  45.           [alpha_mask]"+r"(alpha_mask)
    46. 

  46.         :
    47. 

  47.         : "memory"
    48. 

  48.       );
    49. 

  49.     }
    50. 

  50. 

  51.     for (i = 0; i < (width & 3); ++i) {
    52. 

  52.       __asm__ volatile (
    53. 

  53.         "lbu    %[temp0],      0(%[palpha])                \n\t"
    54. 

  54.         "addiu  %[palpha],     %[palpha],     1            \n\t"
    55. 

  55.         "sb     %[temp0],      0(%[pdst])                  \n\t"
    56. 

  56.         "and    %[alpha_mask], %[alpha_mask], %[temp0]     \n\t"
    57. 

  57.         "addiu  %[pdst],       %[pdst],       4            \n\t"
    58. 

  58.         : [temp0]"=&r"(temp0), [palpha]"+r"(palpha), [pdst]"+r"(pdst),
    59. 

  59.           [alpha_mask]"+r"(alpha_mask)
    60. 

  60.         :
    61. 

  61.         : "memory"
    62. 

  62.       );
    63. 

  63.     }
    64. 

  64.     alpha += alpha_stride;
    65. 

  65.     dst += dst_stride;
    66. 

  66.   }
    67. 

  67. 

  68.   __asm__ volatile (
    69. 

  69.     "ext    %[temp0],      %[alpha_mask], 0, 16            \n\t"
    70. 

  70.     "srl    %[alpha_mask], %[alpha_mask], 16               \n\t"
    71. 

  71.     "and    %[alpha_mask], %[alpha_mask], %[temp0]         \n\t"
    72. 

  72.     "ext    %[temp0],      %[alpha_mask], 0, 8             \n\t"
    73. 

  73.     "srl    %[alpha_mask], %[alpha_mask], 8                \n\t"
    74. 

  74.     "and    %[alpha_mask], %[alpha_mask], %[temp0]         \n\t"
    75. 

  75.     : [temp0]"=&r"(temp0), [alpha_mask]"+r"(alpha_mask)
    76. 

  76.     :
    77. 

  77.   );
    78. 

  78. 

  79.   return (alpha_mask != 0xff);
    80. 

  80. }
    81. 

  81. 

  82. static void MultARGBRow_MIPSdspR2(uint32_t* const ptr, int width,
    83. 

  83.                                   int inverse) {
    84. 

  84.   int x;
    85. 

  85.   const uint32_t c_00ffffff = 0x00ffffffu;
    86. 

  86.   const uint32_t c_ff000000 = 0xff000000u;
    87. 

  87.   const uint32_t c_8000000  = 0x00800000u;
    88. 

  88.   const uint32_t c_8000080  = 0x00800080u;
    89. 

  89.   for (x = 0; x < width; ++x) {
    90. 

  90.     const uint32_t argb = ptr[x];
    91. 

  91.     if (argb < 0xff000000u) {      // alpha < 255
    92. 

  92.       if (argb <= 0x00ffffffu) {   // alpha == 0
    93. 

  93.         ptr[x] = 0;
    94. 

  94.       } else {
    95. 

  95.         int temp0, temp1, temp2, temp3, alpha;
    96. 

  96.         __asm__ volatile (
    97. 

  97.           "srl          %[alpha],   %[argb],       24                \n\t"
    98. 

  98.           "replv.qb     %[temp0],   %[alpha]                         \n\t"
    99. 

  99.           "and          %[temp0],   %[temp0],      %[c_00ffffff]     \n\t"
    100. 

  100.           "beqz         %[inverse], 0f                               \n\t"
    101. 

  101.           "divu         $zero,      %[c_ff000000], %[alpha]          \n\t"
    102. 

  102.           "mflo         %[temp0]                                     \n\t"
    103. 

  103.         "0:                                                          \n\t"
    104. 

  104.           "andi         %[temp1],   %[argb],       0xff              \n\t"
    105. 

  105.           "ext          %[temp2],   %[argb],       8,             8  \n\t"
    106. 

  106.           "ext          %[temp3],   %[argb],       16,            8  \n\t"
    107. 

  107.           "mul          %[temp1],   %[temp1],      %[temp0]          \n\t"
    108. 

  108.           "mul          %[temp2],   %[temp2],      %[temp0]          \n\t"
    109. 

  109.           "mul          %[temp3],   %[temp3],      %[temp0]          \n\t"
    110. 

  110.           "precrq.ph.w  %[temp1],   %[temp2],      %[temp1]          \n\t"
    111. 

  111.           "addu         %[temp3],   %[temp3],      %[c_8000000]      \n\t"
    112. 

  112.           "addu         %[temp1],   %[temp1],      %[c_8000080]      \n\t"
    113. 

  113.           "precrq.ph.w  %[temp3],   %[argb],       %[temp3]          \n\t"
    114. 

  114.           "precrq.qb.ph %[temp1],   %[temp3],      %[temp1]          \n\t"
    115. 

  115.           : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
    116. 

  116.             [temp3]"=&r"(temp3), [alpha]"=&r"(alpha)
    117. 

  117.           : [inverse]"r"(inverse), [c_00ffffff]"r"(c_00ffffff),
    118. 

  118.             [c_8000000]"r"(c_8000000), [c_8000080]"r"(c_8000080),
    119. 

  119.             [c_ff000000]"r"(c_ff000000), [argb]"r"(argb)
    120. 

  120.           : "memory", "hi", "lo"
    121. 

  121.         );
    122. 

  122.         ptr[x] = temp1;
    123. 

  123.       }
    124. 

  124.     }
    125. 

  125.   }
    126. 

  126. }
    127. 

  127. 

  128. #ifdef WORDS_BIGENDIAN
    129. 

  129. static void PackARGB_MIPSdspR2(const uint8_t* a, const uint8_t* r,
    130. 

  130.                                const uint8_t* g, const uint8_t* b, int len,
    131. 

  131.                                uint32_t* out) {
    132. 

  132.   int temp0, temp1, temp2, temp3, offset;
    133. 

  133.   const int rest = len & 1;
    134. 

  134.   const uint32_t* const loop_end = out + len - rest;
    135. 

  135.   const int step = 4;
    136. 

  136.   __asm__ volatile (
    137. 

  137.     "xor          %[offset],   %[offset], %[offset]    \n\t"
    138. 

  138.     "beq          %[loop_end], %[out],    0f           \n\t"
    139. 

  139.   "2:                                                  \n\t"
    140. 

  140.     "lbux         %[temp0],    %[offset](%[a])         \n\t"
    141. 

  141.     "lbux         %[temp1],    %[offset](%[r])         \n\t"
    142. 

  142.     "lbux         %[temp2],    %[offset](%[g])         \n\t"
    143. 

  143.     "lbux         %[temp3],    %[offset](%[b])         \n\t"
    144. 

  144.     "ins          %[temp1],    %[temp0],  16,     16   \n\t"
    145. 

  145.     "ins          %[temp3],    %[temp2],  16,     16   \n\t"
    146. 

  146.     "addiu        %[out],      %[out],    4            \n\t"
    147. 

  147.     "precr.qb.ph  %[temp0],    %[temp1],  %[temp3]     \n\t"
    148. 

  148.     "sw           %[temp0],    -4(%[out])              \n\t"
    149. 

  149.     "addu         %[offset],   %[offset], %[step]      \n\t"
    150. 

  150.     "bne          %[loop_end], %[out],    2b           \n\t"
    151. 

  151.   "0:                                                  \n\t"
    152. 

  152.     "beq          %[rest],     $zero,     1f           \n\t"
    153. 

  153.     "lbux         %[temp0],    %[offset](%[a])         \n\t"
    154. 

  154.     "lbux         %[temp1],    %[offset](%[r])         \n\t"
    155. 

  155.     "lbux         %[temp2],    %[offset](%[g])         \n\t"
    156. 

  156.     "lbux         %[temp3],    %[offset](%[b])         \n\t"
    157. 

  157.     "ins          %[temp1],    %[temp0],  16,     16   \n\t"
    158. 

  158.     "ins          %[temp3],    %[temp2],  16,     16   \n\t"
    159. 

  159.     "precr.qb.ph  %[temp0],    %[temp1],  %[temp3]     \n\t"
    160. 

  160.     "sw           %[temp0],    0(%[out])               \n\t"
    161. 

  161.   "1:                                                  \n\t"
    162. 

  162.     : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
    163. 

  163.       [temp3]"=&r"(temp3), [offset]"=&r"(offset), [out]"+&r"(out)
    164. 

  164.     : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
    165. 

  165.       [loop_end]"r"(loop_end), [rest]"r"(rest)
    166. 

  166.     : "memory"
    167. 

  167.   );
    168. 

  168. }
    169. 

  169. #endif  // WORDS_BIGENDIAN
    170. 

  170. 

  171. static void PackRGB_MIPSdspR2(const uint8_t* r, const uint8_t* g,
    172. 

  172.                               const uint8_t* b, int len, int step,
    173. 

  173.                               uint32_t* out) {
    174. 

  174.   int temp0, temp1, temp2, offset;
    175. 

  175.   const int rest = len & 1;
    176. 

  176.   const int a = 0xff;
    177. 

  177.   const uint32_t* const loop_end = out + len - rest;
    178. 

  178.   __asm__ volatile (
    179. 

  179.     "xor          %[offset],   %[offset], %[offset]    \n\t"
    180. 

  180.     "beq          %[loop_end], %[out],    0f           \n\t"
    181. 

  181.   "2:                                                  \n\t"
    182. 

  182.     "lbux         %[temp0],    %[offset](%[r])         \n\t"
    183. 

  183.     "lbux         %[temp1],    %[offset](%[g])         \n\t"
    184. 

  184.     "lbux         %[temp2],    %[offset](%[b])         \n\t"
    185. 

  185.     "ins          %[temp0],    %[a],      16,     16   \n\t"
    186. 

  186.     "ins          %[temp2],    %[temp1],  16,     16   \n\t"
    187. 

  187.     "addiu        %[out],      %[out],    4            \n\t"
    188. 

  188.     "precr.qb.ph  %[temp0],    %[temp0],  %[temp2]     \n\t"
    189. 

  189.     "sw           %[temp0],    -4(%[out])              \n\t"
    190. 

  190.     "addu         %[offset],   %[offset], %[step]      \n\t"
    191. 

  191.     "bne          %[loop_end], %[out],    2b           \n\t"
    192. 

  192.   "0:                                                  \n\t"
    193. 

  193.     "beq          %[rest],     $zero,     1f           \n\t"
    194. 

  194.     "lbux         %[temp0],    %[offset](%[r])         \n\t"
    195. 

  195.     "lbux         %[temp1],    %[offset](%[g])         \n\t"
    196. 

  196.     "lbux         %[temp2],    %[offset](%[b])         \n\t"
    197. 

  197.     "ins          %[temp0],    %[a],      16,     16   \n\t"
    198. 

  198.     "ins          %[temp2],    %[temp1],  16,     16   \n\t"
    199. 

  199.     "precr.qb.ph  %[temp0],    %[temp0],  %[temp2]     \n\t"
    200. 

  200.     "sw           %[temp0],    0(%[out])               \n\t"
    201. 

  201.   "1:                                                  \n\t"
    202. 

  202.     : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
    203. 

  203.       [offset]"=&r"(offset), [out]"+&r"(out)
    204. 

  204.     : [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
    205. 

  205.       [loop_end]"r"(loop_end), [rest]"r"(rest)
    206. 

  206.     : "memory"
    207. 

  207.   );
    208. 

  208. }
    209. 

  209. 

  210. //------------------------------------------------------------------------------
    211. 

  211. // Entry point
    212. 

  212. 

  213. extern void WebPInitAlphaProcessingMIPSdspR2(void);
    214. 

  214. 

  215. WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingMIPSdspR2(void) {
    216. 

  216.   WebPDispatchAlpha = DispatchAlpha_MIPSdspR2;
    217. 

  217.   WebPMultARGBRow = MultARGBRow_MIPSdspR2;
    218. 

  218. #ifdef WORDS_BIGENDIAN
    219. 

  219.   WebPPackARGB = PackARGB_MIPSdspR2;
    220. 

  220. #endif
    221. 

  221.   WebPPackRGB = PackRGB_MIPSdspR2;
    222. 

  222. }
    223. 

  223. 

  224. #else  // !WEBP_USE_MIPS_DSP_R2
    225. 

  225. 

  226. WEBP_DSP_INIT_STUB(WebPInitAlphaProcessingMIPSdspR2)
    227. 

  227. 

  228. #endif  // WEBP_USE_MIPS_DSP_R2
    229. 

  229.