michael@0: /*
michael@0:  * jsimd_arm.c
michael@0:  *
michael@0:  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
michael@0:  * Copyright 2009-2011 D. R. Commander
michael@0:  * 
michael@0:  * Based on the x86 SIMD extension for IJG JPEG library,
michael@0:  * Copyright (C) 1999-2006, MIYASAKA Masaru.
michael@0:  * For conditions of distribution and use, see copyright notice in jsimdext.inc
michael@0:  *
michael@0:  * This file contains the interface between the "normal" portions
michael@0:  * of the library and the SIMD implementations when running on
michael@0:  * ARM architecture.
michael@0:  *
michael@0:  * Based on the stubs from 'jsimd_none.c'
michael@0:  */
michael@0: 
michael@0: #define JPEG_INTERNALS
michael@0: #include "../jinclude.h"
michael@0: #include "../jpeglib.h"
michael@0: #include "../jsimd.h"
michael@0: #include "../jdct.h"
michael@0: #include "../jsimddct.h"
michael@0: #include "jsimd.h"
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <string.h>
michael@0: #include <ctype.h>
michael@0: 
michael@0: static unsigned int simd_support = ~0;
michael@0: 
michael@0: #if defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
michael@0: 
michael@0: #define SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT (1024 * 1024)
michael@0: 
michael@0: LOCAL(int)
michael@0: check_feature (char *buffer, char *feature)
michael@0: {
michael@0:   char *p;
michael@0:   if (*feature == 0)
michael@0:     return 0;
michael@0:   if (strncmp(buffer, "Features", 8) != 0)
michael@0:     return 0;
michael@0:   buffer += 8;
michael@0:   while (isspace(*buffer))
michael@0:     buffer++;
michael@0: 
michael@0:   /* Check if 'feature' is present in the buffer as a separate word */
michael@0:   while ((p = strstr(buffer, feature))) {
michael@0:     if (p > buffer && !isspace(*(p - 1))) {
michael@0:       buffer++;
michael@0:       continue;
michael@0:     }
michael@0:     p += strlen(feature);
michael@0:     if (*p != 0 && !isspace(*p)) {
michael@0:       buffer++;
michael@0:       continue;
michael@0:     }
michael@0:     return 1;
michael@0:   }
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: LOCAL(int)
michael@0: parse_proc_cpuinfo (int bufsize)
michael@0: {
michael@0:   char *buffer = (char *)malloc(bufsize);
michael@0:   FILE *fd;
michael@0:   simd_support = 0;
michael@0: 
michael@0:   if (!buffer)
michael@0:     return 0;
michael@0: 
michael@0:   fd = fopen("/proc/cpuinfo", "r");
michael@0:   if (fd) {
michael@0:     while (fgets(buffer, bufsize, fd)) {
michael@0:       if (!strchr(buffer, '\n') && !feof(fd)) {
michael@0:         /* "impossible" happened - insufficient size of the buffer! */
michael@0:         fclose(fd);
michael@0:         free(buffer);
michael@0:         return 0;
michael@0:       }
michael@0:       if (check_feature(buffer, "neon"))
michael@0:         simd_support |= JSIMD_ARM_NEON;
michael@0:     }
michael@0:     fclose(fd);
michael@0:   }
michael@0:   free(buffer);
michael@0:   return 1;
michael@0: }
michael@0: 
michael@0: #endif
michael@0: 
michael@0: /*
michael@0:  * Check what SIMD accelerations are supported.
michael@0:  *
michael@0:  * FIXME: This code is racy under a multi-threaded environment.
michael@0:  */
michael@0: LOCAL(void)
michael@0: init_simd (void)
michael@0: {
michael@0:   char *env = NULL;
michael@0: #if !defined(__ARM_NEON__) && defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
michael@0:   int bufsize = 1024; /* an initial guess for the line buffer size limit */
michael@0: #endif
michael@0: 
michael@0:   if (simd_support != ~0U)
michael@0:     return;
michael@0: 
michael@0:   simd_support = 0;
michael@0: 
michael@0: #if defined(__ARM_NEON__)
michael@0:   simd_support |= JSIMD_ARM_NEON;
michael@0: #elif defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
michael@0:   /* We still have a chance to use NEON regardless of globally used
michael@0:    * -mcpu/-mfpu options passed to gcc by performing runtime detection via
michael@0:    * /proc/cpuinfo parsing on linux/android */
michael@0:   while (!parse_proc_cpuinfo(bufsize)) {
michael@0:     bufsize *= 2;
michael@0:     if (bufsize > SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT)
michael@0:       break;
michael@0:   }
michael@0: #endif
michael@0: 
michael@0:   /* Force different settings through environment variables */
michael@0:   env = getenv("JSIMD_FORCE_ARM_NEON");
michael@0:   if ((env != NULL) && (strcmp(env, "1") == 0))
michael@0:     simd_support &= JSIMD_ARM_NEON;
michael@0:   env = getenv("JSIMD_FORCE_NO_SIMD");
michael@0:   if ((env != NULL) && (strcmp(env, "1") == 0))
michael@0:     simd_support = 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_rgb_ycc (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_rgb_gray (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_ycc_rgb (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
michael@0:     return 0;
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_rgb_ycc_convert (j_compress_ptr cinfo,
michael@0:                        JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
michael@0:                        JDIMENSION output_row, int num_rows)
michael@0: {
michael@0:   void (*neonfct)(JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
michael@0: 
michael@0:   switch(cinfo->in_color_space)
michael@0:   {
michael@0:     case JCS_EXT_RGB:
michael@0:       neonfct=jsimd_extrgb_ycc_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_RGBX:
michael@0:     case JCS_EXT_RGBA:
michael@0:       neonfct=jsimd_extrgbx_ycc_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_BGR:
michael@0:       neonfct=jsimd_extbgr_ycc_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_BGRX:
michael@0:     case JCS_EXT_BGRA:
michael@0:       neonfct=jsimd_extbgrx_ycc_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_XBGR:
michael@0:     case JCS_EXT_ABGR:
michael@0:       neonfct=jsimd_extxbgr_ycc_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_XRGB:
michael@0:     case JCS_EXT_ARGB:
michael@0:       neonfct=jsimd_extxrgb_ycc_convert_neon;
michael@0:       break;
michael@0:     default:
michael@0:       neonfct=jsimd_extrgb_ycc_convert_neon;
michael@0:       break;
michael@0:   }
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     neonfct(cinfo->image_width, input_buf,
michael@0:         output_buf, output_row, num_rows);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_rgb_gray_convert (j_compress_ptr cinfo,
michael@0:                         JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
michael@0:                         JDIMENSION output_row, int num_rows)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_ycc_rgb_convert (j_decompress_ptr cinfo,
michael@0:                        JSAMPIMAGE input_buf, JDIMENSION input_row,
michael@0:                        JSAMPARRAY output_buf, int num_rows)
michael@0: {
michael@0:   void (*neonfct)(JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY, int);
michael@0: 
michael@0:   switch(cinfo->out_color_space)
michael@0:   {
michael@0:     case JCS_EXT_RGB:
michael@0:       neonfct=jsimd_ycc_extrgb_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_RGBX:
michael@0:     case JCS_EXT_RGBA:
michael@0:       neonfct=jsimd_ycc_extrgbx_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_BGR:
michael@0:       neonfct=jsimd_ycc_extbgr_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_BGRX:
michael@0:     case JCS_EXT_BGRA:
michael@0:       neonfct=jsimd_ycc_extbgrx_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_XBGR:
michael@0:     case JCS_EXT_ABGR:
michael@0:       neonfct=jsimd_ycc_extxbgr_convert_neon;
michael@0:       break;
michael@0:     case JCS_EXT_XRGB:
michael@0:     case JCS_EXT_ARGB:
michael@0:       neonfct=jsimd_ycc_extxrgb_convert_neon;
michael@0:       break;
michael@0:   default:
michael@0:       neonfct=jsimd_ycc_extrgb_convert_neon;
michael@0:       break;
michael@0:   }
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     neonfct(cinfo->output_width, input_buf,
michael@0:         input_row, output_buf, num_rows);
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v2_downsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v1_downsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v2_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                        JSAMPARRAY input_data, JSAMPARRAY output_data)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v1_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                        JSAMPARRAY input_data, JSAMPARRAY output_data)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v2_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v1_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v2_upsample (j_decompress_ptr cinfo,
michael@0:                      jpeg_component_info * compptr, 
michael@0:                      JSAMPARRAY input_data,
michael@0:                      JSAMPARRAY * output_data_ptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v1_upsample (j_decompress_ptr cinfo,
michael@0:                      jpeg_component_info * compptr, 
michael@0:                      JSAMPARRAY input_data,
michael@0:                      JSAMPARRAY * output_data_ptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v2_fancy_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v1_fancy_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v2_fancy_upsample (j_decompress_ptr cinfo,
michael@0:                            jpeg_component_info * compptr, 
michael@0:                            JSAMPARRAY input_data,
michael@0:                            JSAMPARRAY * output_data_ptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v1_fancy_upsample (j_decompress_ptr cinfo,
michael@0:                            jpeg_component_info * compptr, 
michael@0:                            JSAMPARRAY input_data,
michael@0:                            JSAMPARRAY * output_data_ptr)
michael@0: {
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     jsimd_h2v1_fancy_upsample_neon(cinfo->max_v_samp_factor,
michael@0:         compptr->downsampled_width, input_data, output_data_ptr);
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v2_merged_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_h2v1_merged_upsample (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v2_merged_upsample (j_decompress_ptr cinfo,
michael@0:                             JSAMPIMAGE input_buf,
michael@0:                             JDIMENSION in_row_group_ctr,
michael@0:                             JSAMPARRAY output_buf)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_h2v1_merged_upsample (j_decompress_ptr cinfo,
michael@0:                             JSAMPIMAGE input_buf,
michael@0:                             JDIMENSION in_row_group_ctr,
michael@0:                             JSAMPARRAY output_buf)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_convsamp (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if (sizeof(DCTELEM) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_convsamp_float (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_convsamp (JSAMPARRAY sample_data, JDIMENSION start_col,
michael@0:                 DCTELEM * workspace)
michael@0: {
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     jsimd_convsamp_neon(sample_data, start_col, workspace);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_convsamp_float (JSAMPARRAY sample_data, JDIMENSION start_col,
michael@0:                       FAST_FLOAT * workspace)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_fdct_islow (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_fdct_ifast (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(DCTELEM) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_fdct_float (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_fdct_islow (DCTELEM * data)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_fdct_ifast (DCTELEM * data)
michael@0: {
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     jsimd_fdct_ifast_neon(data);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_fdct_float (FAST_FLOAT * data)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_quantize (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JCOEF) != 2)
michael@0:     return 0;
michael@0:   if (sizeof(DCTELEM) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_quantize_float (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_quantize (JCOEFPTR coef_block, DCTELEM * divisors,
michael@0:                 DCTELEM * workspace)
michael@0: {
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     jsimd_quantize_neon(coef_block, divisors, workspace);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_quantize_float (JCOEFPTR coef_block, FAST_FLOAT * divisors,
michael@0:                       FAST_FLOAT * workspace)
michael@0: {
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_idct_2x2 (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JCOEF) != 2)
michael@0:     return 0;
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if (sizeof(ISLOW_MULT_TYPE) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_idct_4x4 (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JCOEF) != 2)
michael@0:     return 0;
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if (sizeof(ISLOW_MULT_TYPE) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
michael@0:                 JDIMENSION output_col)
michael@0: {
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     jsimd_idct_2x2_neon(compptr->dct_table, coef_block, output_buf, output_col);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
michael@0:                 JDIMENSION output_col)
michael@0: {
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     jsimd_idct_4x4_neon(compptr->dct_table, coef_block, output_buf, output_col);
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_idct_islow (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JCOEF) != 2)
michael@0:     return 0;
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if (sizeof(ISLOW_MULT_TYPE) != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if (simd_support & JSIMD_ARM_NEON)
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_idct_ifast (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   /* The code is optimised for these values only */
michael@0:   if (DCTSIZE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JCOEF) != 2)
michael@0:     return 0;
michael@0:   if (BITS_IN_JSAMPLE != 8)
michael@0:     return 0;
michael@0:   if (sizeof(JDIMENSION) != 4)
michael@0:     return 0;
michael@0:   if (sizeof(IFAST_MULT_TYPE) != 2)
michael@0:     return 0;
michael@0:   if (IFAST_SCALE_BITS != 2)
michael@0:     return 0;
michael@0: 
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     return 1;
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(int)
michael@0: jsimd_can_idct_float (void)
michael@0: {
michael@0:   init_simd();
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
michael@0:                 JDIMENSION output_col)
michael@0: {
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     jsimd_idct_islow_neon(compptr->dct_table, coef_block, output_buf, output_col);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
michael@0:                 JDIMENSION output_col)
michael@0: {
michael@0:   if ((simd_support & JSIMD_ARM_NEON))
michael@0:     jsimd_idct_ifast_neon(compptr->dct_table, coef_block, output_buf, output_col);
michael@0: }
michael@0: 
michael@0: GLOBAL(void)
michael@0: jsimd_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
michael@0:                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
michael@0:                 JDIMENSION output_col)
michael@0: {
michael@0: }
michael@0: