kc3-lang/libjpeg-turbo/simd/powerpc/jdsample-altivec.c

• Show log

  Commit

• Hash : 602f0592
  Author :
  Date : 2024-12-12T00:09:34
  

  AltiVec: Disable/Fix some strict compiler warnings
  
  We use a standard set of strict compiler warnings with Clang and GCC to
  continuously test and maintain C89 conformance in the libjpeg API code.
  However, SIMD extensions need not comply with that.  The AltiVec code
  specifically uses some C99isms, so disable -Wc99-extensions and
  -Wpedantic in the scope of that code.  Also disable -Wshadow, because
  I'm too lazy to fix the TRANSPOSE() macro.  Also
  use #ifdef __BIG_ENDIAN__ and #if defined(__BIG_ENDIAN__) instead
  of #if __BIG_ENDIAN__
  

Download

• simd/powerpc/jdsample-altivec.c

• /*
   * AltiVec optimizations for libjpeg-turbo
   *
   * Copyright (C) 2015, 2024, D. R. Commander.  All Rights Reserved.
   *
   * 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.
   */
  
  /* CHROMA UPSAMPLING */
  
  #include "jsimd_altivec.h"
  
  
  void jsimd_h2v1_fancy_upsample_altivec(int max_v_samp_factor,
                                         JDIMENSION downsampled_width,
                                         JSAMPARRAY input_data,
                                         JSAMPARRAY *output_data_ptr)
  {
    JSAMPARRAY output_data = *output_data_ptr;
    JSAMPROW inptr, outptr;
    int inrow, incol;
  
    __vector unsigned char this0, last0, p_last0, next0 = { 0 }, p_next0,
      out;
    __vector short this0e, this0o, this0l, this0h, last0l, last0h,
      next0l, next0h, outle, outhe, outlo, outho;
  
    /* Constants */
    __vector unsigned char pb_zero = { __16X(0) }, pb_three = { __16X(3) },
      last_index_col0 =
        {  0,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14 },
      last_index =
        { 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 },
      next_index =
        {  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16 },
      next_index_lastcol =
        {  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 15 },
  #ifdef __BIG_ENDIAN__
      merge_pack_index =
        {  1, 17,  3, 19,  5, 21,  7, 23,  9, 25, 11, 27, 13, 29, 15, 31 };
  #else
      merge_pack_index =
        {  0, 16,  2, 18,  4, 20,  6, 22,  8, 24, 10, 26, 12, 28, 14, 30 };
  #endif
    __vector short pw_one = { __8X(1) }, pw_two = { __8X(2) };
  
    for (inrow = 0; inrow < max_v_samp_factor; inrow++) {
      inptr = input_data[inrow];
      outptr = output_data[inrow];
  
      if (downsampled_width & 15)
        inptr[downsampled_width] = inptr[downsampled_width - 1];
  
      this0 = vec_ld(0, inptr);
      p_last0 = vec_perm(this0, this0, last_index_col0);
      last0 = this0;
  
      for (incol = downsampled_width; incol > 0;
           incol -= 16, inptr += 16, outptr += 32) {
  
        if (downsampled_width - incol > 0) {
          p_last0 = vec_perm(last0, this0, last_index);
          last0 = this0;
        }
  
        if (incol <= 16)
          p_next0 = vec_perm(this0, this0, next_index_lastcol);
        else {
          next0 = vec_ld(16, inptr);
          p_next0 = vec_perm(this0, next0, next_index);
        }
  
        this0e = (__vector short)vec_mule(this0, pb_three);
        this0o = (__vector short)vec_mulo(this0, pb_three);
        this0l = vec_mergeh(this0e, this0o);
        this0h = vec_mergel(this0e, this0o);
  
        last0l = (__vector short)VEC_UNPACKHU(p_last0);
        last0h = (__vector short)VEC_UNPACKLU(p_last0);
        last0l = vec_add(last0l, pw_one);
  
        next0l = (__vector short)VEC_UNPACKHU(p_next0);
        next0h = (__vector short)VEC_UNPACKLU(p_next0);
        next0l = vec_add(next0l, pw_two);
  
        outle = vec_add(this0l, last0l);
        outlo = vec_add(this0l, next0l);
        outle = vec_sr(outle, (__vector unsigned short)pw_two);
        outlo = vec_sr(outlo, (__vector unsigned short)pw_two);
  
        out = vec_perm((__vector unsigned char)outle,
                       (__vector unsigned char)outlo, merge_pack_index);
        vec_st(out, 0, outptr);
  
        if (incol > 8) {
          last0h = vec_add(last0h, pw_one);
          next0h = vec_add(next0h, pw_two);
  
          outhe = vec_add(this0h, last0h);
          outho = vec_add(this0h, next0h);
          outhe = vec_sr(outhe, (__vector unsigned short)pw_two);
          outho = vec_sr(outho, (__vector unsigned short)pw_two);
  
          out = vec_perm((__vector unsigned char)outhe,
                         (__vector unsigned char)outho, merge_pack_index);
          vec_st(out, 16, outptr);
        }
  
        this0 = next0;
      }
    }
  }
  
  
  void jsimd_h2v2_fancy_upsample_altivec(int max_v_samp_factor,
                                         JDIMENSION downsampled_width,
                                         JSAMPARRAY input_data,
                                         JSAMPARRAY *output_data_ptr)
  {
    JSAMPARRAY output_data = *output_data_ptr;
    JSAMPROW inptr_1, inptr0, inptr1, outptr0, outptr1;
    int inrow, outrow, incol;
  
    __vector unsigned char this_1, this0, this1, out;
    __vector short this_1l, this_1h, this0l, this0h, this1l, this1h,
      lastcolsum_1h, lastcolsum1h,
      p_lastcolsum_1l, p_lastcolsum_1h, p_lastcolsum1l, p_lastcolsum1h,
      thiscolsum_1l, thiscolsum_1h, thiscolsum1l, thiscolsum1h,
      nextcolsum_1l = { 0 }, nextcolsum_1h = { 0 },
      nextcolsum1l = { 0 }, nextcolsum1h = { 0 },
      p_nextcolsum_1l, p_nextcolsum_1h, p_nextcolsum1l, p_nextcolsum1h,
      tmpl, tmph, outle, outhe, outlo, outho;
  
    /* Constants */
    __vector unsigned char pb_zero = { __16X(0) },
      last_index_col0 =
        {  0,  1,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13 },
      last_index =
        { 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 },
      next_index =
        {  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17 },
      next_index_lastcol =
        {  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 14, 15 },
  #ifdef __BIG_ENDIAN__
      merge_pack_index =
        {  1, 17,  3, 19,  5, 21,  7, 23,  9, 25, 11, 27, 13, 29, 15, 31 };
  #else
      merge_pack_index =
        {  0, 16,  2, 18,  4, 20,  6, 22,  8, 24, 10, 26, 12, 28, 14, 30 };
  #endif
    __vector short pw_zero = { __8X(0) }, pw_three = { __8X(3) },
      pw_seven = { __8X(7) }, pw_eight = { __8X(8) };
    __vector unsigned short pw_four = { __8X(4) };
  
    for (inrow = 0, outrow = 0; outrow < max_v_samp_factor; inrow++) {
  
      inptr_1 = input_data[inrow - 1];
      inptr0 = input_data[inrow];
      inptr1 = input_data[inrow + 1];
      outptr0 = output_data[outrow++];
      outptr1 = output_data[outrow++];
  
      if (downsampled_width & 15) {
        inptr_1[downsampled_width] = inptr_1[downsampled_width - 1];
        inptr0[downsampled_width] = inptr0[downsampled_width - 1];
        inptr1[downsampled_width] = inptr1[downsampled_width - 1];
      }
  
      this0 = vec_ld(0, inptr0);
      this0l = (__vector short)VEC_UNPACKHU(this0);
      this0h = (__vector short)VEC_UNPACKLU(this0);
      this0l = vec_mladd(this0l, pw_three, pw_zero);
      this0h = vec_mladd(this0h, pw_three, pw_zero);
  
      this_1 = vec_ld(0, inptr_1);
      this_1l = (__vector short)VEC_UNPACKHU(this_1);
      this_1h = (__vector short)VEC_UNPACKLU(this_1);
      thiscolsum_1l = vec_add(this0l, this_1l);
      thiscolsum_1h = vec_add(this0h, this_1h);
      lastcolsum_1h = thiscolsum_1h;
      p_lastcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1l, last_index_col0);
      p_lastcolsum_1h = vec_perm(thiscolsum_1l, thiscolsum_1h, last_index);
  
      this1 = vec_ld(0, inptr1);
      this1l = (__vector short)VEC_UNPACKHU(this1);
      this1h = (__vector short)VEC_UNPACKLU(this1);
      thiscolsum1l = vec_add(this0l, this1l);
      thiscolsum1h = vec_add(this0h, this1h);
      lastcolsum1h = thiscolsum1h;
      p_lastcolsum1l = vec_perm(thiscolsum1l, thiscolsum1l, last_index_col0);
      p_lastcolsum1h = vec_perm(thiscolsum1l, thiscolsum1h, last_index);
  
      for (incol = downsampled_width; incol > 0;
           incol -= 16, inptr_1 += 16, inptr0 += 16, inptr1 += 16,
           outptr0 += 32, outptr1 += 32) {
  
        if (downsampled_width - incol > 0) {
          p_lastcolsum_1l = vec_perm(lastcolsum_1h, thiscolsum_1l, last_index);
          p_lastcolsum_1h = vec_perm(thiscolsum_1l, thiscolsum_1h, last_index);
          p_lastcolsum1l = vec_perm(lastcolsum1h, thiscolsum1l, last_index);
          p_lastcolsum1h = vec_perm(thiscolsum1l, thiscolsum1h, last_index);
          lastcolsum_1h = thiscolsum_1h;  lastcolsum1h = thiscolsum1h;
        }
  
        if (incol <= 16) {
          p_nextcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1h, next_index);
          p_nextcolsum_1h = vec_perm(thiscolsum_1h, thiscolsum_1h,
                                     next_index_lastcol);
          p_nextcolsum1l = vec_perm(thiscolsum1l, thiscolsum1h, next_index);
          p_nextcolsum1h = vec_perm(thiscolsum1h, thiscolsum1h,
                                    next_index_lastcol);
        } else {
          this0 = vec_ld(16, inptr0);
          this0l = (__vector short)VEC_UNPACKHU(this0);
          this0h = (__vector short)VEC_UNPACKLU(this0);
          this0l = vec_mladd(this0l, pw_three, pw_zero);
          this0h = vec_mladd(this0h, pw_three, pw_zero);
  
          this_1 = vec_ld(16, inptr_1);
          this_1l = (__vector short)VEC_UNPACKHU(this_1);
          this_1h = (__vector short)VEC_UNPACKLU(this_1);
          nextcolsum_1l = vec_add(this0l, this_1l);
          nextcolsum_1h = vec_add(this0h, this_1h);
          p_nextcolsum_1l = vec_perm(thiscolsum_1l, thiscolsum_1h, next_index);
          p_nextcolsum_1h = vec_perm(thiscolsum_1h, nextcolsum_1l, next_index);
  
          this1 = vec_ld(16, inptr1);
          this1l = (__vector short)VEC_UNPACKHU(this1);
          this1h = (__vector short)VEC_UNPACKLU(this1);
          nextcolsum1l = vec_add(this0l, this1l);
          nextcolsum1h = vec_add(this0h, this1h);
          p_nextcolsum1l = vec_perm(thiscolsum1l, thiscolsum1h, next_index);
          p_nextcolsum1h = vec_perm(thiscolsum1h, nextcolsum1l, next_index);
        }
  
        /* Process the upper row */
  
        tmpl = vec_mladd(thiscolsum_1l, pw_three, pw_zero);
        outle = vec_add(tmpl, p_lastcolsum_1l);
        outle = vec_add(outle, pw_eight);
        outle = vec_sr(outle, pw_four);
  
        outlo = vec_add(tmpl, p_nextcolsum_1l);
        outlo = vec_add(outlo, pw_seven);
        outlo = vec_sr(outlo, pw_four);
  
        out = vec_perm((__vector unsigned char)outle,
                       (__vector unsigned char)outlo, merge_pack_index);
        vec_st(out, 0, outptr0);
  
        if (incol > 8) {
          tmph = vec_mladd(thiscolsum_1h, pw_three, pw_zero);
          outhe = vec_add(tmph, p_lastcolsum_1h);
          outhe = vec_add(outhe, pw_eight);
          outhe = vec_sr(outhe, pw_four);
  
          outho = vec_add(tmph, p_nextcolsum_1h);
          outho = vec_add(outho, pw_seven);
          outho = vec_sr(outho, pw_four);
  
          out = vec_perm((__vector unsigned char)outhe,
                         (__vector unsigned char)outho, merge_pack_index);
          vec_st(out, 16, outptr0);
        }
  
        /* Process the lower row */
  
        tmpl = vec_mladd(thiscolsum1l, pw_three, pw_zero);
        outle = vec_add(tmpl, p_lastcolsum1l);
        outle = vec_add(outle, pw_eight);
        outle = vec_sr(outle, pw_four);
  
        outlo = vec_add(tmpl, p_nextcolsum1l);
        outlo = vec_add(outlo, pw_seven);
        outlo = vec_sr(outlo, pw_four);
  
        out = vec_perm((__vector unsigned char)outle,
                       (__vector unsigned char)outlo, merge_pack_index);
        vec_st(out, 0, outptr1);
  
        if (incol > 8) {
          tmph = vec_mladd(thiscolsum1h, pw_three, pw_zero);
          outhe = vec_add(tmph, p_lastcolsum1h);
          outhe = vec_add(outhe, pw_eight);
          outhe = vec_sr(outhe, pw_four);
  
          outho = vec_add(tmph, p_nextcolsum1h);
          outho = vec_add(outho, pw_seven);
          outho = vec_sr(outho, pw_four);
  
          out = vec_perm((__vector unsigned char)outhe,
                         (__vector unsigned char)outho, merge_pack_index);
          vec_st(out, 16, outptr1);
        }
  
        thiscolsum_1l = nextcolsum_1l;  thiscolsum_1h = nextcolsum_1h;
        thiscolsum1l = nextcolsum1l;  thiscolsum1h = nextcolsum1h;
      }
    }
  }
  
  
  /* These are rarely used (mainly just for decompressing YCCK images) */
  
  void jsimd_h2v1_upsample_altivec(int max_v_samp_factor,
                                   JDIMENSION output_width,
                                   JSAMPARRAY input_data,
                                   JSAMPARRAY *output_data_ptr)
  {
    JSAMPARRAY output_data = *output_data_ptr;
    JSAMPROW inptr, outptr;
    int inrow, incol;
  
    __vector unsigned char in, inl, inh;
  
    for (inrow = 0; inrow < max_v_samp_factor; inrow++) {
      inptr = input_data[inrow];
      outptr = output_data[inrow];
  
      for (incol = (output_width + 31) & (~31); incol > 0;
           incol -= 64, inptr += 32, outptr += 64) {
  
        in = vec_ld(0, inptr);
        inl = vec_mergeh(in, in);
        inh = vec_mergel(in, in);
  
        vec_st(inl, 0, outptr);
        vec_st(inh, 16, outptr);
  
        if (incol > 32) {
          in = vec_ld(16, inptr);
          inl = vec_mergeh(in, in);
          inh = vec_mergel(in, in);
  
          vec_st(inl, 32, outptr);
          vec_st(inh, 48, outptr);
        }
      }
    }
  }
  
  
  void jsimd_h2v2_upsample_altivec(int max_v_samp_factor,
                                   JDIMENSION output_width,
                                   JSAMPARRAY input_data,
                                   JSAMPARRAY *output_data_ptr)
  {
    JSAMPARRAY output_data = *output_data_ptr;
    JSAMPROW inptr, outptr0, outptr1;
    int inrow, outrow, incol;
  
    __vector unsigned char in, inl, inh;
  
    for (inrow = 0, outrow = 0; outrow < max_v_samp_factor; inrow++) {
  
      inptr = input_data[inrow];
      outptr0 = output_data[outrow++];
      outptr1 = output_data[outrow++];
  
      for (incol = (output_width + 31) & (~31); incol > 0;
           incol -= 64, inptr += 32, outptr0 += 64, outptr1 += 64) {
  
        in = vec_ld(0, inptr);
        inl = vec_mergeh(in, in);
        inh = vec_mergel(in, in);
  
        vec_st(inl, 0, outptr0);
        vec_st(inl, 0, outptr1);
  
        vec_st(inh, 16, outptr0);
        vec_st(inh, 16, outptr1);
  
        if (incol > 32) {
          in = vec_ld(16, inptr);
          inl = vec_mergeh(in, in);
          inh = vec_mergel(in, in);
  
          vec_st(inl, 32, outptr0);
          vec_st(inl, 32, outptr1);
  
          vec_st(inh, 48, outptr0);
          vec_st(inh, 48, outptr1);
        }
      }
    }
  }
  

Download