1 files changed, 0 insertions, 872 deletions
diff --git a/simd/powerpc/jsimd.c b/simd/powerpc/jsimd.c
deleted file mode 100644
index d0d3981..0000000
--- a/simd/powerpc/jsimd.c
+++ /dev/null
@@ -1,872 +0,0 @@
-/*
- * jsimd_powerpc.c
- *
- * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright (C) 2009-2011, 2014-2016, 2018, D. R. Commander.
- * Copyright (C) 2015-2016, 2018, Matthieu Darbois.
- *
- * Based on the x86 SIMD extension for IJG JPEG library,
- * Copyright (C) 1999-2006, MIYASAKA Masaru.
- * For conditions of distribution and use, see copyright notice in jsimdext.inc
- *
- * This file contains the interface between the "normal" portions
- * of the library and the SIMD implementations when running on a
- * PowerPC architecture.
- */
-
-#ifdef __amigaos4__
-/* This must be defined first as it re-defines GLOBAL otherwise */
-#include <proto/exec.h>
-#endif
-
-#define JPEG_INTERNALS
-#include "../../jinclude.h"
-#include "../../jpeglib.h"
-#include "../../jsimd.h"
-#include "../../jdct.h"
-#include "../../jsimddct.h"
-#include "../jsimd.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-
-#if defined(__OpenBSD__)
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <machine/cpu.h>
-#endif
-
-static unsigned int simd_support = ~0;
-
-#if !defined(__ALTIVEC__) && (defined(__linux__) || defined(ANDROID) || defined(__ANDROID__))
-
-#define SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT  (1024 * 1024)
-
-LOCAL(int)
-check_feature(char *buffer, char *feature)
-{
-  char *p;
-
-  if (*feature == 0)
-    return 0;
-  if (strncmp(buffer, "cpu", 3) != 0)
-    return 0;
-  buffer += 3;
-  while (isspace(*buffer))
-    buffer++;
-
-  /* Check if 'feature' is present in the buffer as a separate word */
-  while ((p = strstr(buffer, feature))) {
-    if (p > buffer && !isspace(*(p - 1))) {
-      buffer++;
-      continue;
-    }
-    p += strlen(feature);
-    if (*p != 0 && !isspace(*p)) {
-      buffer++;
-      continue;
-    }
-    return 1;
-  }
-  return 0;
-}
-
-LOCAL(int)
-parse_proc_cpuinfo(int bufsize)
-{
-  char *buffer = (char *)malloc(bufsize);
-  FILE *fd;
-
-  simd_support = 0;
-
-  if (!buffer)
-    return 0;
-
-  fd = fopen("/proc/cpuinfo", "r");
-  if (fd) {
-    while (fgets(buffer, bufsize, fd)) {
-      if (!strchr(buffer, '\n') && !feof(fd)) {
-        /* "impossible" happened - insufficient size of the buffer! */
-        fclose(fd);
-        free(buffer);
-        return 0;
-      }
-      if (check_feature(buffer, "altivec"))
-        simd_support |= JSIMD_ALTIVEC;
-    }
-    fclose(fd);
-  }
-  free(buffer);
-  return 1;
-}
-
-#endif
-
-/*
- * Check what SIMD accelerations are supported.
- *
- * FIXME: This code is racy under a multi-threaded environment.
- */
-LOCAL(void)
-init_simd(void)
-{
-#ifndef NO_GETENV
-  char *env = NULL;
-#endif
-#if !defined(__ALTIVEC__) && (defined(__linux__) || defined(ANDROID) || defined(__ANDROID__))
-  int bufsize = 1024; /* an initial guess for the line buffer size limit */
-#elif defined(__amigaos4__)
-  uint32 altivec = 0;
-#elif defined(__OpenBSD__)
-  int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
-  int altivec;
-  size_t len = sizeof(altivec);
-#endif
-
-  if (simd_support != ~0U)
-    return;
-
-  simd_support = 0;
-
-#if defined(__ALTIVEC__) || defined(__APPLE__)
-  simd_support |= JSIMD_ALTIVEC;
-#elif defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
-  while (!parse_proc_cpuinfo(bufsize)) {
-    bufsize *= 2;
-    if (bufsize > SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT)
-      break;
-  }
-#elif defined(__amigaos4__)
-  IExec->GetCPUInfoTags(GCIT_VectorUnit, &altivec, TAG_DONE);
-  if (altivec == VECTORTYPE_ALTIVEC)
-    simd_support |= JSIMD_ALTIVEC;
-#elif defined(__OpenBSD__)
-  if (sysctl(mib, 2, &altivec, &len, NULL, 0) == 0 && altivec != 0)
-    simd_support |= JSIMD_ALTIVEC;
-#endif
-
-#ifndef NO_GETENV
-  /* Force different settings through environment variables */
-  env = getenv("JSIMD_FORCEALTIVEC");
-  if ((env != NULL) && (strcmp(env, "1") == 0))
-    simd_support = JSIMD_ALTIVEC;
-  env = getenv("JSIMD_FORCENONE");
-  if ((env != NULL) && (strcmp(env, "1") == 0))
-    simd_support = 0;
-#endif
-}
-
-GLOBAL(int)
-jsimd_can_rgb_ycc(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-  if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_rgb_gray(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-  if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_ycc_rgb(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-  if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_ycc_rgb565(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_rgb_ycc_convert(j_compress_ptr cinfo, JSAMPARRAY input_buf,
-                      JSAMPIMAGE output_buf, JDIMENSION output_row,
-                      int num_rows)
-{
-  void (*altivecfct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
-
-  switch (cinfo->in_color_space) {
-  case JCS_EXT_RGB:
-    altivecfct = jsimd_extrgb_ycc_convert_altivec;
-    break;
-  case JCS_EXT_RGBX:
-  case JCS_EXT_RGBA:
-    altivecfct = jsimd_extrgbx_ycc_convert_altivec;
-    break;
-  case JCS_EXT_BGR:
-    altivecfct = jsimd_extbgr_ycc_convert_altivec;
-    break;
-  case JCS_EXT_BGRX:
-  case JCS_EXT_BGRA:
-    altivecfct = jsimd_extbgrx_ycc_convert_altivec;
-    break;
-  case JCS_EXT_XBGR:
-  case JCS_EXT_ABGR:
-    altivecfct = jsimd_extxbgr_ycc_convert_altivec;
-    break;
-  case JCS_EXT_XRGB:
-  case JCS_EXT_ARGB:
-    altivecfct = jsimd_extxrgb_ycc_convert_altivec;
-    break;
-  default:
-    altivecfct = jsimd_rgb_ycc_convert_altivec;
-    break;
-  }
-
-  altivecfct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
-}
-
-GLOBAL(void)
-jsimd_rgb_gray_convert(j_compress_ptr cinfo, JSAMPARRAY input_buf,
-                       JSAMPIMAGE output_buf, JDIMENSION output_row,
-                       int num_rows)
-{
-  void (*altivecfct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
-
-  switch (cinfo->in_color_space) {
-  case JCS_EXT_RGB:
-    altivecfct = jsimd_extrgb_gray_convert_altivec;
-    break;
-  case JCS_EXT_RGBX:
-  case JCS_EXT_RGBA:
-    altivecfct = jsimd_extrgbx_gray_convert_altivec;
-    break;
-  case JCS_EXT_BGR:
-    altivecfct = jsimd_extbgr_gray_convert_altivec;
-    break;
-  case JCS_EXT_BGRX:
-  case JCS_EXT_BGRA:
-    altivecfct = jsimd_extbgrx_gray_convert_altivec;
-    break;
-  case JCS_EXT_XBGR:
-  case JCS_EXT_ABGR:
-    altivecfct = jsimd_extxbgr_gray_convert_altivec;
-    break;
-  case JCS_EXT_XRGB:
-  case JCS_EXT_ARGB:
-    altivecfct = jsimd_extxrgb_gray_convert_altivec;
-    break;
-  default:
-    altivecfct = jsimd_rgb_gray_convert_altivec;
-    break;
-  }
-
-  altivecfct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
-}
-
-GLOBAL(void)
-jsimd_ycc_rgb_convert(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
-                      JDIMENSION input_row, JSAMPARRAY output_buf,
-                      int num_rows)
-{
-  void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY, int);
-
-  switch (cinfo->out_color_space) {
-  case JCS_EXT_RGB:
-    altivecfct = jsimd_ycc_extrgb_convert_altivec;
-    break;
-  case JCS_EXT_RGBX:
-  case JCS_EXT_RGBA:
-    altivecfct = jsimd_ycc_extrgbx_convert_altivec;
-    break;
-  case JCS_EXT_BGR:
-    altivecfct = jsimd_ycc_extbgr_convert_altivec;
-    break;
-  case JCS_EXT_BGRX:
-  case JCS_EXT_BGRA:
-    altivecfct = jsimd_ycc_extbgrx_convert_altivec;
-    break;
-  case JCS_EXT_XBGR:
-  case JCS_EXT_ABGR:
-    altivecfct = jsimd_ycc_extxbgr_convert_altivec;
-    break;
-  case JCS_EXT_XRGB:
-  case JCS_EXT_ARGB:
-    altivecfct = jsimd_ycc_extxrgb_convert_altivec;
-    break;
-  default:
-    altivecfct = jsimd_ycc_rgb_convert_altivec;
-    break;
-  }
-
-  altivecfct(cinfo->output_width, input_buf, input_row, output_buf, num_rows);
-}
-
-GLOBAL(void)
-jsimd_ycc_rgb565_convert(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
-                         JDIMENSION input_row, JSAMPARRAY output_buf,
-                         int num_rows)
-{
-}
-
-GLOBAL(int)
-jsimd_can_h2v2_downsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_h2v1_downsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_h2v2_downsample(j_compress_ptr cinfo, jpeg_component_info *compptr,
-                      JSAMPARRAY input_data, JSAMPARRAY output_data)
-{
-  jsimd_h2v2_downsample_altivec(cinfo->image_width, cinfo->max_v_samp_factor,
-                                compptr->v_samp_factor,
-                                compptr->width_in_blocks, input_data,
-                                output_data);
-}
-
-GLOBAL(void)
-jsimd_h2v1_downsample(j_compress_ptr cinfo, jpeg_component_info *compptr,
-                      JSAMPARRAY input_data, JSAMPARRAY output_data)
-{
-  jsimd_h2v1_downsample_altivec(cinfo->image_width, cinfo->max_v_samp_factor,
-                                compptr->v_samp_factor,
-                                compptr->width_in_blocks, input_data,
-                                output_data);
-}
-
-GLOBAL(int)
-jsimd_can_h2v2_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_h2v1_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_h2v2_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                    JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
-{
-  jsimd_h2v2_upsample_altivec(cinfo->max_v_samp_factor, cinfo->output_width,
-                              input_data, output_data_ptr);
-}
-
-GLOBAL(void)
-jsimd_h2v1_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                    JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
-{
-  jsimd_h2v1_upsample_altivec(cinfo->max_v_samp_factor, cinfo->output_width,
-                              input_data, output_data_ptr);
-}
-
-GLOBAL(int)
-jsimd_can_h2v2_fancy_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_h2v1_fancy_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_h2v2_fancy_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                          JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
-{
-  jsimd_h2v2_fancy_upsample_altivec(cinfo->max_v_samp_factor,
-                                    compptr->downsampled_width, input_data,
-                                    output_data_ptr);
-}
-
-GLOBAL(void)
-jsimd_h2v1_fancy_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                          JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
-{
-  jsimd_h2v1_fancy_upsample_altivec(cinfo->max_v_samp_factor,
-                                    compptr->downsampled_width, input_data,
-                                    output_data_ptr);
-}
-
-GLOBAL(int)
-jsimd_can_h2v2_merged_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_h2v1_merged_upsample(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_h2v2_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
-                           JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
-{
-  void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
-
-  switch (cinfo->out_color_space) {
-  case JCS_EXT_RGB:
-    altivecfct = jsimd_h2v2_extrgb_merged_upsample_altivec;
-    break;
-  case JCS_EXT_RGBX:
-  case JCS_EXT_RGBA:
-    altivecfct = jsimd_h2v2_extrgbx_merged_upsample_altivec;
-    break;
-  case JCS_EXT_BGR:
-    altivecfct = jsimd_h2v2_extbgr_merged_upsample_altivec;
-    break;
-  case JCS_EXT_BGRX:
-  case JCS_EXT_BGRA:
-    altivecfct = jsimd_h2v2_extbgrx_merged_upsample_altivec;
-    break;
-  case JCS_EXT_XBGR:
-  case JCS_EXT_ABGR:
-    altivecfct = jsimd_h2v2_extxbgr_merged_upsample_altivec;
-    break;
-  case JCS_EXT_XRGB:
-  case JCS_EXT_ARGB:
-    altivecfct = jsimd_h2v2_extxrgb_merged_upsample_altivec;
-    break;
-  default:
-    altivecfct = jsimd_h2v2_merged_upsample_altivec;
-    break;
-  }
-
-  altivecfct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
-}
-
-GLOBAL(void)
-jsimd_h2v1_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
-                           JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
-{
-  void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
-
-  switch (cinfo->out_color_space) {
-  case JCS_EXT_RGB:
-    altivecfct = jsimd_h2v1_extrgb_merged_upsample_altivec;
-    break;
-  case JCS_EXT_RGBX:
-  case JCS_EXT_RGBA:
-    altivecfct = jsimd_h2v1_extrgbx_merged_upsample_altivec;
-    break;
-  case JCS_EXT_BGR:
-    altivecfct = jsimd_h2v1_extbgr_merged_upsample_altivec;
-    break;
-  case JCS_EXT_BGRX:
-  case JCS_EXT_BGRA:
-    altivecfct = jsimd_h2v1_extbgrx_merged_upsample_altivec;
-    break;
-  case JCS_EXT_XBGR:
-  case JCS_EXT_ABGR:
-    altivecfct = jsimd_h2v1_extxbgr_merged_upsample_altivec;
-    break;
-  case JCS_EXT_XRGB:
-  case JCS_EXT_ARGB:
-    altivecfct = jsimd_h2v1_extxrgb_merged_upsample_altivec;
-    break;
-  default:
-    altivecfct = jsimd_h2v1_merged_upsample_altivec;
-    break;
-  }
-
-  altivecfct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
-}
-
-GLOBAL(int)
-jsimd_can_convsamp(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (BITS_IN_JSAMPLE != 8)
-    return 0;
-  if (sizeof(JDIMENSION) != 4)
-    return 0;
-  if (sizeof(DCTELEM) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_convsamp_float(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_convsamp(JSAMPARRAY sample_data, JDIMENSION start_col,
-               DCTELEM *workspace)
-{
-  jsimd_convsamp_altivec(sample_data, start_col, workspace);
-}
-
-GLOBAL(void)
-jsimd_convsamp_float(JSAMPARRAY sample_data, JDIMENSION start_col,
-                     FAST_FLOAT *workspace)
-{
-}
-
-GLOBAL(int)
-jsimd_can_fdct_islow(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (sizeof(DCTELEM) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_fdct_ifast(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (sizeof(DCTELEM) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_fdct_float(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_fdct_islow(DCTELEM *data)
-{
-  jsimd_fdct_islow_altivec(data);
-}
-
-GLOBAL(void)
-jsimd_fdct_ifast(DCTELEM *data)
-{
-  jsimd_fdct_ifast_altivec(data);
-}
-
-GLOBAL(void)
-jsimd_fdct_float(FAST_FLOAT *data)
-{
-}
-
-GLOBAL(int)
-jsimd_can_quantize(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (sizeof(JCOEF) != 2)
-    return 0;
-  if (sizeof(DCTELEM) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_quantize_float(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_quantize(JCOEFPTR coef_block, DCTELEM *divisors, DCTELEM *workspace)
-{
-  jsimd_quantize_altivec(coef_block, divisors, workspace);
-}
-
-GLOBAL(void)
-jsimd_quantize_float(JCOEFPTR coef_block, FAST_FLOAT *divisors,
-                     FAST_FLOAT *workspace)
-{
-}
-
-GLOBAL(int)
-jsimd_can_idct_2x2(void)
-{
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_idct_4x4(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_idct_2x2(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-               JCOEFPTR coef_block, JSAMPARRAY output_buf,
-               JDIMENSION output_col)
-{
-}
-
-GLOBAL(void)
-jsimd_idct_4x4(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-               JCOEFPTR coef_block, JSAMPARRAY output_buf,
-               JDIMENSION output_col)
-{
-}
-
-GLOBAL(int)
-jsimd_can_idct_islow(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (sizeof(JCOEF) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_idct_ifast(void)
-{
-  init_simd();
-
-  /* The code is optimised for these values only */
-  if (DCTSIZE != 8)
-    return 0;
-  if (sizeof(JCOEF) != 2)
-    return 0;
-
-  if (simd_support & JSIMD_ALTIVEC)
-    return 1;
-
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_can_idct_float(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_idct_islow(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
-                 JDIMENSION output_col)
-{
-  jsimd_idct_islow_altivec(compptr->dct_table, coef_block, output_buf,
-                           output_col);
-}
-
-GLOBAL(void)
-jsimd_idct_ifast(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
-                 JDIMENSION output_col)
-{
-  jsimd_idct_ifast_altivec(compptr->dct_table, coef_block, output_buf,
-                           output_col);
-}
-
-GLOBAL(void)
-jsimd_idct_float(j_decompress_ptr cinfo, jpeg_component_info *compptr,
-                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
-                 JDIMENSION output_col)
-{
-}
-
-GLOBAL(int)
-jsimd_can_huff_encode_one_block(void)
-{
-  return 0;
-}
-
-GLOBAL(JOCTET *)
-jsimd_huff_encode_one_block(void *state, JOCTET *buffer, JCOEFPTR block,
-                            int last_dc_val, c_derived_tbl *dctbl,
-                            c_derived_tbl *actbl)
-{
-  return NULL;
-}
-
-GLOBAL(int)
-jsimd_can_encode_mcu_AC_first_prepare(void)
-{
-  return 0;
-}
-
-GLOBAL(void)
-jsimd_encode_mcu_AC_first_prepare(const JCOEF *block,
-                                  const int *jpeg_natural_order_start, int Sl,
-                                  int Al, JCOEF *values, size_t *zerobits)
-{
-}
-
-GLOBAL(int)
-jsimd_can_encode_mcu_AC_refine_prepare(void)
-{
-  return 0;
-}
-
-GLOBAL(int)
-jsimd_encode_mcu_AC_refine_prepare(const JCOEF *block,
-                                   const int *jpeg_natural_order_start, int Sl,
-                                   int Al, JCOEF *absvalues, size_t *bits)
-{
-  return 0;
-}