1 files changed, 1110 insertions, 0 deletions
diff --git a/media/libjpeg/simd/x86_64/jsimd.c b/media/libjpeg/simd/x86_64/jsimd.c
new file mode 100644
index 0000000000..3f5ee77eb9
--- /dev/null
+++ b/media/libjpeg/simd/x86_64/jsimd.c
@@ -0,0 +1,1110 @@
+/*
+ * jsimd_x86_64.c
+ *
+ * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ * Copyright (C) 2009-2011, 2014, 2016, 2018, 2022-2023, D. R. Commander.
+ * Copyright (C) 2015-2016, 2018, 2022, 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
+ * 64-bit x86 architecture.
+ */
+
+#define JPEG_INTERNALS
+#include "../../jinclude.h"
+#include "../../jpeglib.h"
+#include "../../jsimd.h"
+#include "../../jdct.h"
+#include "../../jsimddct.h"
+#include "../jsimd.h"
+
+/*
+ * In the PIC cases, we have no guarantee that constants will keep
+ * their alignment. This macro allows us to verify it at runtime.
+ */
+#define IS_ALIGNED(ptr, order)  (((size_t)ptr & ((1 << order) - 1)) == 0)
+
+#define IS_ALIGNED_SSE(ptr)  (IS_ALIGNED(ptr, 4)) /* 16 byte alignment */
+#define IS_ALIGNED_AVX(ptr)  (IS_ALIGNED(ptr, 5)) /* 32 byte alignment */
+
+static THREAD_LOCAL unsigned int simd_support = (unsigned int)(~0);
+static THREAD_LOCAL unsigned int simd_huffman = 1;
+
+/*
+ * Check what SIMD accelerations are supported.
+ */
+LOCAL(void)
+init_simd(void)
+{
+#ifndef NO_GETENV
+  char env[2] = { 0 };
+#endif
+
+  if (simd_support != ~0U)
+    return;
+
+  simd_support = jpeg_simd_cpu_support();
+
+#ifndef NO_GETENV
+  /* Force different settings through environment variables */
+  if (!GETENV_S(env, 2, "JSIMD_FORCESSE2") && !strcmp(env, "1"))
+    simd_support &= JSIMD_SSE2;
+  if (!GETENV_S(env, 2, "JSIMD_FORCEAVX2") && !strcmp(env, "1"))
+    simd_support &= JSIMD_AVX2;
+  if (!GETENV_S(env, 2, "JSIMD_FORCENONE") && !strcmp(env, "1"))
+    simd_support = 0;
+  if (!GETENV_S(env, 2, "JSIMD_NOHUFFENC") && !strcmp(env, "1"))
+    simd_huffman = 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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_rgb_ycc_convert_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_rgb_ycc_convert_sse2))
+    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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_rgb_gray_convert_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_rgb_gray_convert_sse2))
+    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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_ycc_rgb_convert_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_ycc_rgb_convert_sse2))
+    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 (*avx2fct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
+  void (*sse2fct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
+
+  if (simd_support == ~0U)
+    init_simd();
+
+  switch (cinfo->in_color_space) {
+  case JCS_EXT_RGB:
+    avx2fct = jsimd_extrgb_ycc_convert_avx2;
+    sse2fct = jsimd_extrgb_ycc_convert_sse2;
+    break;
+  case JCS_EXT_RGBX:
+  case JCS_EXT_RGBA:
+    avx2fct = jsimd_extrgbx_ycc_convert_avx2;
+    sse2fct = jsimd_extrgbx_ycc_convert_sse2;
+    break;
+  case JCS_EXT_BGR:
+    avx2fct = jsimd_extbgr_ycc_convert_avx2;
+    sse2fct = jsimd_extbgr_ycc_convert_sse2;
+    break;
+  case JCS_EXT_BGRX:
+  case JCS_EXT_BGRA:
+    avx2fct = jsimd_extbgrx_ycc_convert_avx2;
+    sse2fct = jsimd_extbgrx_ycc_convert_sse2;
+    break;
+  case JCS_EXT_XBGR:
+  case JCS_EXT_ABGR:
+    avx2fct = jsimd_extxbgr_ycc_convert_avx2;
+    sse2fct = jsimd_extxbgr_ycc_convert_sse2;
+    break;
+  case JCS_EXT_XRGB:
+  case JCS_EXT_ARGB:
+    avx2fct = jsimd_extxrgb_ycc_convert_avx2;
+    sse2fct = jsimd_extxrgb_ycc_convert_sse2;
+    break;
+  default:
+    avx2fct = jsimd_rgb_ycc_convert_avx2;
+    sse2fct = jsimd_rgb_ycc_convert_sse2;
+    break;
+  }
+
+  if (simd_support & JSIMD_AVX2)
+    avx2fct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
+  else
+    sse2fct(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 (*avx2fct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
+  void (*sse2fct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
+
+  if (simd_support == ~0U)
+    init_simd();
+
+  switch (cinfo->in_color_space) {
+  case JCS_EXT_RGB:
+    avx2fct = jsimd_extrgb_gray_convert_avx2;
+    sse2fct = jsimd_extrgb_gray_convert_sse2;
+    break;
+  case JCS_EXT_RGBX:
+  case JCS_EXT_RGBA:
+    avx2fct = jsimd_extrgbx_gray_convert_avx2;
+    sse2fct = jsimd_extrgbx_gray_convert_sse2;
+    break;
+  case JCS_EXT_BGR:
+    avx2fct = jsimd_extbgr_gray_convert_avx2;
+    sse2fct = jsimd_extbgr_gray_convert_sse2;
+    break;
+  case JCS_EXT_BGRX:
+  case JCS_EXT_BGRA:
+    avx2fct = jsimd_extbgrx_gray_convert_avx2;
+    sse2fct = jsimd_extbgrx_gray_convert_sse2;
+    break;
+  case JCS_EXT_XBGR:
+  case JCS_EXT_ABGR:
+    avx2fct = jsimd_extxbgr_gray_convert_avx2;
+    sse2fct = jsimd_extxbgr_gray_convert_sse2;
+    break;
+  case JCS_EXT_XRGB:
+  case JCS_EXT_ARGB:
+    avx2fct = jsimd_extxrgb_gray_convert_avx2;
+    sse2fct = jsimd_extxrgb_gray_convert_sse2;
+    break;
+  default:
+    avx2fct = jsimd_rgb_gray_convert_avx2;
+    sse2fct = jsimd_rgb_gray_convert_sse2;
+    break;
+  }
+
+  if (simd_support & JSIMD_AVX2)
+    avx2fct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
+  else
+    sse2fct(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 (*avx2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY, int);
+  void (*sse2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY, int);
+
+  if (simd_support == ~0U)
+    init_simd();
+
+  switch (cinfo->out_color_space) {
+  case JCS_EXT_RGB:
+    avx2fct = jsimd_ycc_extrgb_convert_avx2;
+    sse2fct = jsimd_ycc_extrgb_convert_sse2;
+    break;
+  case JCS_EXT_RGBX:
+  case JCS_EXT_RGBA:
+    avx2fct = jsimd_ycc_extrgbx_convert_avx2;
+    sse2fct = jsimd_ycc_extrgbx_convert_sse2;
+    break;
+  case JCS_EXT_BGR:
+    avx2fct = jsimd_ycc_extbgr_convert_avx2;
+    sse2fct = jsimd_ycc_extbgr_convert_sse2;
+    break;
+  case JCS_EXT_BGRX:
+  case JCS_EXT_BGRA:
+    avx2fct = jsimd_ycc_extbgrx_convert_avx2;
+    sse2fct = jsimd_ycc_extbgrx_convert_sse2;
+    break;
+  case JCS_EXT_XBGR:
+  case JCS_EXT_ABGR:
+    avx2fct = jsimd_ycc_extxbgr_convert_avx2;
+    sse2fct = jsimd_ycc_extxbgr_convert_sse2;
+    break;
+  case JCS_EXT_XRGB:
+  case JCS_EXT_ARGB:
+    avx2fct = jsimd_ycc_extxrgb_convert_avx2;
+    sse2fct = jsimd_ycc_extxrgb_convert_sse2;
+    break;
+  default:
+    avx2fct = jsimd_ycc_rgb_convert_avx2;
+    sse2fct = jsimd_ycc_rgb_convert_sse2;
+    break;
+  }
+
+  if (simd_support & JSIMD_AVX2)
+    avx2fct(cinfo->output_width, input_buf, input_row, output_buf, num_rows);
+  else
+    sse2fct(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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_h2v2_downsample(j_compress_ptr cinfo, jpeg_component_info *compptr,
+                      JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v2_downsample_avx2(cinfo->image_width, cinfo->max_v_samp_factor,
+                               compptr->v_samp_factor,
+                               compptr->width_in_blocks, input_data,
+                               output_data);
+  else
+    jsimd_h2v2_downsample_sse2(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)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v1_downsample_avx2(cinfo->image_width, cinfo->max_v_samp_factor,
+                               compptr->v_samp_factor,
+                               compptr->width_in_blocks, input_data,
+                               output_data);
+  else
+    jsimd_h2v1_downsample_sse2(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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_h2v2_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+                    JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v2_upsample_avx2(cinfo->max_v_samp_factor, cinfo->output_width,
+                             input_data, output_data_ptr);
+  else
+    jsimd_h2v2_upsample_sse2(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)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v1_upsample_avx2(cinfo->max_v_samp_factor, cinfo->output_width,
+                             input_data, output_data_ptr);
+  else
+    jsimd_h2v1_upsample_sse2(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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_fancy_upsample_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_fancy_upsample_sse2))
+    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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_fancy_upsample_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_fancy_upsample_sse2))
+    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)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v2_fancy_upsample_avx2(cinfo->max_v_samp_factor,
+                                   compptr->downsampled_width, input_data,
+                                   output_data_ptr);
+  else
+    jsimd_h2v2_fancy_upsample_sse2(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)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_h2v1_fancy_upsample_avx2(cinfo->max_v_samp_factor,
+                                   compptr->downsampled_width, input_data,
+                                   output_data_ptr);
+  else
+    jsimd_h2v1_fancy_upsample_sse2(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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_merged_upsample_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_merged_upsample_sse2))
+    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_AVX2) &&
+      IS_ALIGNED_AVX(jconst_merged_upsample_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) &&
+      IS_ALIGNED_SSE(jconst_merged_upsample_sse2))
+    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 (*avx2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
+  void (*sse2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
+
+  if (simd_support == ~0U)
+    init_simd();
+
+  switch (cinfo->out_color_space) {
+  case JCS_EXT_RGB:
+    avx2fct = jsimd_h2v2_extrgb_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extrgb_merged_upsample_sse2;
+    break;
+  case JCS_EXT_RGBX:
+  case JCS_EXT_RGBA:
+    avx2fct = jsimd_h2v2_extrgbx_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extrgbx_merged_upsample_sse2;
+    break;
+  case JCS_EXT_BGR:
+    avx2fct = jsimd_h2v2_extbgr_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extbgr_merged_upsample_sse2;
+    break;
+  case JCS_EXT_BGRX:
+  case JCS_EXT_BGRA:
+    avx2fct = jsimd_h2v2_extbgrx_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extbgrx_merged_upsample_sse2;
+    break;
+  case JCS_EXT_XBGR:
+  case JCS_EXT_ABGR:
+    avx2fct = jsimd_h2v2_extxbgr_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extxbgr_merged_upsample_sse2;
+    break;
+  case JCS_EXT_XRGB:
+  case JCS_EXT_ARGB:
+    avx2fct = jsimd_h2v2_extxrgb_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_extxrgb_merged_upsample_sse2;
+    break;
+  default:
+    avx2fct = jsimd_h2v2_merged_upsample_avx2;
+    sse2fct = jsimd_h2v2_merged_upsample_sse2;
+    break;
+  }
+
+  if (simd_support & JSIMD_AVX2)
+    avx2fct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
+  else
+    sse2fct(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 (*avx2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
+  void (*sse2fct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
+
+  if (simd_support == ~0U)
+    init_simd();
+
+  switch (cinfo->out_color_space) {
+  case JCS_EXT_RGB:
+    avx2fct = jsimd_h2v1_extrgb_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extrgb_merged_upsample_sse2;
+    break;
+  case JCS_EXT_RGBX:
+  case JCS_EXT_RGBA:
+    avx2fct = jsimd_h2v1_extrgbx_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extrgbx_merged_upsample_sse2;
+    break;
+  case JCS_EXT_BGR:
+    avx2fct = jsimd_h2v1_extbgr_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extbgr_merged_upsample_sse2;
+    break;
+  case JCS_EXT_BGRX:
+  case JCS_EXT_BGRA:
+    avx2fct = jsimd_h2v1_extbgrx_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extbgrx_merged_upsample_sse2;
+    break;
+  case JCS_EXT_XBGR:
+  case JCS_EXT_ABGR:
+    avx2fct = jsimd_h2v1_extxbgr_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extxbgr_merged_upsample_sse2;
+    break;
+  case JCS_EXT_XRGB:
+  case JCS_EXT_ARGB:
+    avx2fct = jsimd_h2v1_extxrgb_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_extxrgb_merged_upsample_sse2;
+    break;
+  default:
+    avx2fct = jsimd_h2v1_merged_upsample_avx2;
+    sse2fct = jsimd_h2v1_merged_upsample_sse2;
+    break;
+  }
+
+  if (simd_support & JSIMD_AVX2)
+    avx2fct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
+  else
+    sse2fct(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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_can_convsamp_float(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(FAST_FLOAT) != 4)
+    return 0;
+
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_convsamp(JSAMPARRAY sample_data, JDIMENSION start_col,
+               DCTELEM *workspace)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_convsamp_avx2(sample_data, start_col, workspace);
+  else
+    jsimd_convsamp_sse2(sample_data, start_col, workspace);
+}
+
+GLOBAL(void)
+jsimd_convsamp_float(JSAMPARRAY sample_data, JDIMENSION start_col,
+                     FAST_FLOAT *workspace)
+{
+  jsimd_convsamp_float_sse2(sample_data, start_col, 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_AVX2) && IS_ALIGNED_AVX(jconst_fdct_islow_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_fdct_islow_sse2))
+    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_SSE2) && IS_ALIGNED_SSE(jconst_fdct_ifast_sse2))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_can_fdct_float(void)
+{
+  init_simd();
+
+  /* The code is optimised for these values only */
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(FAST_FLOAT) != 4)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE) && IS_ALIGNED_SSE(jconst_fdct_float_sse))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_fdct_islow(DCTELEM *data)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_fdct_islow_avx2(data);
+  else
+    jsimd_fdct_islow_sse2(data);
+}
+
+GLOBAL(void)
+jsimd_fdct_ifast(DCTELEM *data)
+{
+  jsimd_fdct_ifast_sse2(data);
+}
+
+GLOBAL(void)
+jsimd_fdct_float(FAST_FLOAT *data)
+{
+  jsimd_fdct_float_sse(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_AVX2)
+    return 1;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_can_quantize_float(void)
+{
+  init_simd();
+
+  /* The code is optimised for these values only */
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (sizeof(FAST_FLOAT) != 4)
+    return 0;
+
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_quantize(JCOEFPTR coef_block, DCTELEM *divisors, DCTELEM *workspace)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_quantize_avx2(coef_block, divisors, workspace);
+  else
+    jsimd_quantize_sse2(coef_block, divisors, workspace);
+}
+
+GLOBAL(void)
+jsimd_quantize_float(JCOEFPTR coef_block, FAST_FLOAT *divisors,
+                     FAST_FLOAT *workspace)
+{
+  jsimd_quantize_float_sse2(coef_block, divisors, workspace);
+}
+
+GLOBAL(int)
+jsimd_can_idct_2x2(void)
+{
+  init_simd();
+
+  /* The code is optimised for these values only */
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+  if (sizeof(ISLOW_MULT_TYPE) != 2)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_red_sse2))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_can_idct_4x4(void)
+{
+  init_simd();
+
+  /* The code is optimised for these values only */
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+  if (sizeof(ISLOW_MULT_TYPE) != 2)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_red_sse2))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_idct_2x2(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+               JCOEFPTR coef_block, JSAMPARRAY output_buf,
+               JDIMENSION output_col)
+{
+  jsimd_idct_2x2_sse2(compptr->dct_table, coef_block, output_buf, output_col);
+}
+
+GLOBAL(void)
+jsimd_idct_4x4(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+               JCOEFPTR coef_block, JSAMPARRAY output_buf,
+               JDIMENSION output_col)
+{
+  jsimd_idct_4x4_sse2(compptr->dct_table, coef_block, output_buf, 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 (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+  if (sizeof(ISLOW_MULT_TYPE) != 2)
+    return 0;
+
+  if ((simd_support & JSIMD_AVX2) && IS_ALIGNED_AVX(jconst_idct_islow_avx2))
+    return 1;
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_islow_sse2))
+    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 (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+  if (sizeof(IFAST_MULT_TYPE) != 2)
+    return 0;
+  if (IFAST_SCALE_BITS != 2)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_ifast_sse2))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_can_idct_float(void)
+{
+  init_simd();
+
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (BITS_IN_JSAMPLE != 8)
+    return 0;
+  if (sizeof(JDIMENSION) != 4)
+    return 0;
+  if (sizeof(FAST_FLOAT) != 4)
+    return 0;
+  if (sizeof(FLOAT_MULT_TYPE) != 4)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE2) && IS_ALIGNED_SSE(jconst_idct_float_sse2))
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_idct_islow(j_decompress_ptr cinfo, jpeg_component_info *compptr,
+                 JCOEFPTR coef_block, JSAMPARRAY output_buf,
+                 JDIMENSION output_col)
+{
+  if (simd_support == ~0U)
+    init_simd();
+
+  if (simd_support & JSIMD_AVX2)
+    jsimd_idct_islow_avx2(compptr->dct_table, coef_block, output_buf,
+                          output_col);
+  else
+    jsimd_idct_islow_sse2(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_sse2(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)
+{
+  jsimd_idct_float_sse2(compptr->dct_table, coef_block, output_buf,
+                        output_col);
+}
+
+GLOBAL(int)
+jsimd_can_huff_encode_one_block(void)
+{
+  init_simd();
+
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+
+  if ((simd_support & JSIMD_SSE2) && simd_huffman &&
+      IS_ALIGNED_SSE(jconst_huff_encode_one_block))
+    return 1;
+
+  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 jsimd_huff_encode_one_block_sse2(state, buffer, block, last_dc_val,
+                                          dctbl, actbl);
+}
+
+GLOBAL(int)
+jsimd_can_encode_mcu_AC_first_prepare(void)
+{
+  init_simd();
+
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(void)
+jsimd_encode_mcu_AC_first_prepare(const JCOEF *block,
+                                  const int *jpeg_natural_order_start, int Sl,
+                                  int Al, UJCOEF *values, size_t *zerobits)
+{
+  jsimd_encode_mcu_AC_first_prepare_sse2(block, jpeg_natural_order_start,
+                                         Sl, Al, values, zerobits);
+}
+
+GLOBAL(int)
+jsimd_can_encode_mcu_AC_refine_prepare(void)
+{
+  init_simd();
+
+  if (DCTSIZE != 8)
+    return 0;
+  if (sizeof(JCOEF) != 2)
+    return 0;
+  if (simd_support & JSIMD_SSE2)
+    return 1;
+
+  return 0;
+}
+
+GLOBAL(int)
+jsimd_encode_mcu_AC_refine_prepare(const JCOEF *block,
+                                   const int *jpeg_natural_order_start, int Sl,
+                                   int Al, UJCOEF *absvalues, size_t *bits)
+{
+  return jsimd_encode_mcu_AC_refine_prepare_sse2(block,
+                                                 jpeg_natural_order_start,
+                                                 Sl, Al, absvalues, bits);
+}