kc3-lang/libjpeg-turbo/simd/mips64/jcgryext-mmi.c

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  Date : 2025-09-26T10:09:01
  

  MMI: Format comments consistently with MMX code
  

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• simd/mips64/jcgryext-mmi.c

• /*
   * Loongson MMI optimizations for libjpeg-turbo
   *
   * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
   * Copyright (C) 2014-2015, 2019, D. R. Commander.  All Rights Reserved.
   * Copyright (C) 2016-2018, Loongson Technology Corporation Limited, BeiJing.
   *                          All Rights Reserved.
   * Authors:  ZhangLixia <zhanglixia-hf@loongson.cn>
   *
   * Based on the x86 SIMD extension for IJG JPEG library
   * Copyright (C) 1999-2006, MIYASAKA Masaru.
   *
   * This software is provided 'as-is', without any express or implied
   * warranty.  In no event will the authors be held liable for any damages
   * arising from the use of this software.
   *
   * Permission is granted to anyone to use this software for any purpose,
   * including commercial applications, and to alter it and redistribute it
   * freely, subject to the following restrictions:
   *
   * 1. The origin of this software must not be misrepresented; you must not
   *    claim that you wrote the original software. If you use this software
   *    in a product, an acknowledgment in the product documentation would be
   *    appreciated but is not required.
   * 2. Altered source versions must be plainly marked as such, and must not be
   *    misrepresented as being the original software.
   * 3. This notice may not be removed or altered from any source distribution.
   */
  
  /* This file is included by jcgray-mmi.c */
  
  
  #if RGB_RED == 0
  #define mmA  re
  #define mmB  ro
  #elif RGB_GREEN == 0
  #define mmA  ge
  #define mmB  go
  #elif RGB_BLUE == 0
  #define mmA  be
  #define mmB  bo
  #else
  #define mmA  xe
  #define mmB  xo
  #endif
  
  #if RGB_RED == 1
  #define mmC  re
  #define mmD  ro
  #elif RGB_GREEN == 1
  #define mmC  ge
  #define mmD  go
  #elif RGB_BLUE == 1
  #define mmC  be
  #define mmD  bo
  #else
  #define mmC  xe
  #define mmD  xo
  #endif
  
  #if RGB_RED == 2
  #define mmE  re
  #define mmF  ro
  #elif RGB_GREEN == 2
  #define mmE  ge
  #define mmF  go
  #elif RGB_BLUE == 2
  #define mmE  be
  #define mmF  bo
  #else
  #define mmE  xe
  #define mmF  xo
  #endif
  
  #if RGB_RED == 3
  #define mmG  re
  #define mmH  ro
  #elif RGB_GREEN == 3
  #define mmG  ge
  #define mmH  go
  #elif RGB_BLUE == 3
  #define mmG  be
  #define mmH  bo
  #else
  #define mmG  xe
  #define mmH  xo
  #endif
  
  
  void jsimd_rgb_gray_convert_mmi(JDIMENSION image_width, JSAMPARRAY input_buf,
                                  JSAMPIMAGE output_buf, JDIMENSION output_row,
                                  int num_rows)
  {
    JSAMPROW inptr, outptr;
    int num_cols, col;
    __m64 re, ro, ge, go, be, bo, xe;
  #if RGB_PIXELSIZE == 4
    __m64 xo;
  #endif
    __m64 rgle, rghe, rglo, rgho, bgle, bghe, bglo, bgho;
    __m64 yle_rg, yhe_rg, yle_bg, yhe_bg, yle, yhe, ye;
    __m64 ylo_rg, yho_rg, ylo_bg, yho_bg, ylo, yho, yo, y;
  
    while (--num_rows >= 0) {
      inptr = *input_buf++;
      outptr = output_buf[0][output_row];
      output_row++;
  
      for (num_cols = image_width; num_cols > 0; num_cols -= 8,
           outptr += 8) {
  
  #if RGB_PIXELSIZE == 3
  
        if (num_cols < 8) {
          col = num_cols * 3;
          asm(".set noreorder\r\n"
  
              "li       $8, 1\r\n"
              "move     $9, %3\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 1f\r\n"
              "nop      \r\n"
              "subu     $9, $9, 1\r\n"
              "xor      $12, $12, $12\r\n"
              "move     $13, %5\r\n"
              PTR_ADDU  "$13, $13, $9\r\n"
              "lbu      $12, 0($13)\r\n"
  
              "1:       \r\n"
              "li       $8, 2\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 2f\r\n"
              "nop      \r\n"
              "subu     $9, $9, 2\r\n"
              "xor      $11, $11, $11\r\n"
              "move     $13, %5\r\n"
              PTR_ADDU  "$13, $13, $9\r\n"
              "lhu      $11, 0($13)\r\n"
              "sll      $12, $12, 16\r\n"
              "or       $12, $12, $11\r\n"
  
              "2:       \r\n"
              "dmtc1    $12, %0\r\n"
              "li       $8, 4\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 3f\r\n"
              "nop      \r\n"
              "subu     $9, $9, 4\r\n"
              "move     $13, %5\r\n"
              PTR_ADDU  "$13, $13, $9\r\n"
              "lwu      $14, 0($13)\r\n"
              "dmtc1    $14, %1\r\n"
              "dsll32   $12, $12, 0\r\n"
              "or       $12, $12, $14\r\n"
              "dmtc1    $12, %0\r\n"
  
              "3:       \r\n"
              "li       $8, 8\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 4f\r\n"
              "nop      \r\n"
              "mov.s    %1, %0\r\n"
              "ldc1     %0, 0(%5)\r\n"
              "li       $9, 8\r\n"
              "j        5f\r\n"
              "nop      \r\n"
  
              "4:       \r\n"
              "li       $8, 16\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 5f\r\n"
              "nop      \r\n"
              "mov.s    %2, %0\r\n"
              "ldc1     %0, 0(%5)\r\n"
              "ldc1     %1, 8(%5)\r\n"
  
              "5:       \r\n"
              "nop      \r\n"
              ".set reorder\r\n"
  
              : "=f" (mmA), "=f" (mmG), "=f" (mmF)
              : "r" (col), "r" (num_rows), "r" (inptr)
              : "$f0", "$f2", "$f4", "$8", "$9", "$10", "$11", "$12", "$13",
                "$14", "memory"
             );
        } else {
          if (!(((long)inptr) & 7)) {
            mmA = _mm_load_si64((__m64 *)&inptr[0]);
            mmG = _mm_load_si64((__m64 *)&inptr[8]);
            mmF = _mm_load_si64((__m64 *)&inptr[16]);
          } else {
            mmA = _mm_loadu_si64((__m64 *)&inptr[0]);
            mmG = _mm_loadu_si64((__m64 *)&inptr[8]);
            mmF = _mm_loadu_si64((__m64 *)&inptr[16]);
          }
          inptr += RGB_PIXELSIZE * 8;
        }
        mmD = _mm_srli_si64(mmA, 4 * BYTE_BIT);
        mmA = _mm_slli_si64(mmA, 4 * BYTE_BIT);
  
        mmA = _mm_unpackhi_pi8(mmA, mmG);
        mmG = _mm_slli_si64(mmG, 4 * BYTE_BIT);
  
        mmD = _mm_unpacklo_pi8(mmD, mmF);
        mmG = _mm_unpackhi_pi8(mmG, mmF);
  
        mmE = _mm_srli_si64(mmA, 4 * BYTE_BIT);
        mmA = _mm_slli_si64(mmA, 4 * BYTE_BIT);
  
        mmA = _mm_unpackhi_pi8(mmA, mmD);
        mmD = _mm_slli_si64(mmD, 4 * BYTE_BIT);
  
        mmE = _mm_unpacklo_pi8(mmE, mmG);
        mmD = _mm_unpackhi_pi8(mmD, mmG);
        mmC = _mm_loadhi_pi8_f(mmA);
        mmA = _mm_loadlo_pi8_f(mmA);
  
        mmB = _mm_loadhi_pi8_f(mmE);
        mmE = _mm_loadlo_pi8_f(mmE);
  
        mmF = _mm_loadhi_pi8_f(mmD);
        mmD = _mm_loadlo_pi8_f(mmD);
  
  #else  /* RGB_PIXELSIZE == 4 */
  
        if (num_cols < 8) {
          col = num_cols;
          asm(".set noreorder\r\n"
  
              "li       $8, 1\r\n"
              "move     $9, %4\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 1f\r\n"
              "nop      \r\n"
              "subu     $9, $9, 1\r\n"
              PTR_SLL   "$11, $9, 2\r\n"
              "move     $13, %5\r\n"
              PTR_ADDU  "$13, $13, $11\r\n"
              "lwc1     %0, 0($13)\r\n"
  
              "1:       \r\n"
              "li       $8, 2\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 2f\r\n"
              "nop      \r\n"
              "subu     $9, $9, 2\r\n"
              PTR_SLL   "$11, $9, 2\r\n"
              "move     $13, %5\r\n"
              PTR_ADDU  "$13, $13, $11\r\n"
              "mov.s    %1, %0\r\n"
              "ldc1     %0, 0($13)\r\n"
  
              "2:       \r\n"
              "li       $8, 4\r\n"
              "and      $10, $9, $8\r\n"
              "beqz     $10, 3f\r\n"
              "nop      \r\n"
              "mov.s    %2, %0\r\n"
              "mov.s    %3, %1\r\n"
              "ldc1     %0, 0(%5)\r\n"
              "ldc1     %1, 8(%5)\r\n"
  
              "3:       \r\n"
              "nop      \r\n"
              ".set reorder\r\n"
  
              : "=f" (mmA), "=f" (mmF), "=f" (mmD), "=f" (mmC)
              : "r" (col), "r" (inptr)
              : "$f0", "$f2", "$8", "$9", "$10", "$11", "$13", "memory"
             );
        } else {
          if (!(((long)inptr) & 7)) {
            mmA = _mm_load_si64((__m64 *)&inptr[0]);
            mmF = _mm_load_si64((__m64 *)&inptr[8]);
            mmD = _mm_load_si64((__m64 *)&inptr[16]);
            mmC = _mm_load_si64((__m64 *)&inptr[24]);
          } else {
            mmA = _mm_loadu_si64((__m64 *)&inptr[0]);
            mmF = _mm_loadu_si64((__m64 *)&inptr[8]);
            mmD = _mm_loadu_si64((__m64 *)&inptr[16]);
            mmC = _mm_loadu_si64((__m64 *)&inptr[24]);
          }
          inptr += RGB_PIXELSIZE * 8;
        }
        mmB = _mm_unpackhi_pi8(mmA, mmF);
        mmA = _mm_unpacklo_pi8(mmA, mmF);
  
        mmG = _mm_unpackhi_pi8(mmD, mmC);
        mmD = _mm_unpacklo_pi8(mmD, mmC);
  
        mmE = _mm_unpackhi_pi16(mmA, mmD);
        mmA = _mm_unpacklo_pi16(mmA, mmD);
  
        mmH = _mm_unpackhi_pi16(mmB, mmG);
        mmB = _mm_unpacklo_pi16(mmB, mmG);
  
        mmC = _mm_loadhi_pi8_f(mmA);
        mmA = _mm_loadlo_pi8_f(mmA);
  
        mmD = _mm_loadhi_pi8_f(mmB);
        mmB = _mm_loadlo_pi8_f(mmB);
  
        mmG = _mm_loadhi_pi8_f(mmE);
        mmE = _mm_loadlo_pi8_f(mmE);
  
        mmF = _mm_unpacklo_pi8(mmH, mmH);
        mmH = _mm_unpackhi_pi8(mmH, mmH);
        mmF = _mm_srli_pi16(mmF, BYTE_BIT);
        mmH = _mm_srli_pi16(mmH, BYTE_BIT);
  
  #endif
  
        /* re = (R0 R2 R4 R6), ge = (G0 G2 G4 G6), be = (B0 B2 B4 B6)
         * ro = (R1 R3 R5 R7), go = (G1 G3 G5 G7), bo = (B1 B3 B5 B7)
         *
         * (Original)
         * Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
         *
         * (This implementation)
         * Y  =  0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
         */
  
        rglo = _mm_unpacklo_pi16(ro, go);
        rgho = _mm_unpackhi_pi16(ro, go);
        ylo_rg = _mm_madd_pi16(rglo, PW_F0299_F0337);
        yho_rg = _mm_madd_pi16(rgho, PW_F0299_F0337);
  
        rgle = _mm_unpacklo_pi16(re, ge);
        rghe = _mm_unpackhi_pi16(re, ge);
        yle_rg = _mm_madd_pi16(rgle, PW_F0299_F0337);
        yhe_rg = _mm_madd_pi16(rghe, PW_F0299_F0337);
  
        bglo = _mm_unpacklo_pi16(bo, go);
        bgho = _mm_unpackhi_pi16(bo, go);
        ylo_bg = _mm_madd_pi16(bglo, PW_F0114_F0250);
        yho_bg = _mm_madd_pi16(bgho, PW_F0114_F0250);
  
        ylo = _mm_add_pi32(ylo_bg, ylo_rg);
        yho = _mm_add_pi32(yho_bg, yho_rg);
        ylo = _mm_add_pi32(ylo, PD_ONEHALF);
        yho = _mm_add_pi32(yho, PD_ONEHALF);
        ylo = _mm_srli_pi32(ylo, SCALEBITS);
        yho = _mm_srli_pi32(yho, SCALEBITS);
        yo = _mm_packs_pi32(ylo, yho);
  
        bgle = _mm_unpacklo_pi16(be, ge);
        bghe = _mm_unpackhi_pi16(be, ge);
        yle_bg = _mm_madd_pi16(bgle, PW_F0114_F0250);
        yhe_bg = _mm_madd_pi16(bghe, PW_F0114_F0250);
  
        yle = _mm_add_pi32(yle_bg, yle_rg);
        yhe = _mm_add_pi32(yhe_bg, yhe_rg);
        yle = _mm_add_pi32(yle, PD_ONEHALF);
        yhe = _mm_add_pi32(yhe, PD_ONEHALF);
        yle = _mm_srli_pi32(yle, SCALEBITS);
        yhe = _mm_srli_pi32(yhe, SCALEBITS);
        ye = _mm_packs_pi32(yle, yhe);
  
        yo = _mm_slli_pi16(yo, BYTE_BIT);
        y = _mm_or_si64(ye, yo);
  
        _mm_store_si64((__m64 *)&outptr[0], y);
      }
    }
  }
  
  #undef mmA
  #undef mmB
  #undef mmC
  #undef mmD
  #undef mmE
  #undef mmF
  #undef mmG
  #undef mmH
  

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