third_party/libwebp/dsp/lossless_neon.c - chromium/src - Git at Google

 // Copyright 2014 Google Inc. All Rights Reserved.
 //
 // Use of this source code is governed by a BSD-style license
 // that can be found in the COPYING file in the root of the source
 // tree. An additional intellectual property rights grant can be found
 // in the file PATENTS. All contributing project authors may
 // be found in the AUTHORS file in the root of the source tree.
 // -----------------------------------------------------------------------------
 //
 // NEON variant of methods for lossless decoder
 //
 // Author: Skal (pascal.massimino@gmail.com)

 #include "./dsp.h"

 #if defined(WEBP_USE_NEON)

 #include <arm_neon.h>

 #include "./lossless.h"
 #include "./neon.h"

 //------------------------------------------------------------------------------
 // Colorspace conversion functions

 #if !defined(WORK_AROUND_GCC)
 // gcc 4.6.0 had some trouble (NDK-r9) with this code. We only use it for
 // gcc-4.8.x at least.
 static void ConvertBGRAToRGBA(const uint32_t* src,
                               int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~15);
   for (; src < end; src += 16) {
     uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
     // swap B and R. (VSWP d0,d2 has no intrinsics equivalent!)
     const uint8x16_t tmp = pixel.val[0];
     pixel.val[0] = pixel.val[2];
     pixel.val[2] = tmp;
     vst4q_u8(dst, pixel);
     dst += 64;
   }
   VP8LConvertBGRAToRGBA_C(src, num_pixels & 15, dst);  // left-overs
 }

 static void ConvertBGRAToBGR(const uint32_t* src,
                              int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~15);
   for (; src < end; src += 16) {
     const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
     const uint8x16x3_t tmp = { { pixel.val[0], pixel.val[1], pixel.val[2] } };
     vst3q_u8(dst, tmp);
     dst += 48;
   }
   VP8LConvertBGRAToBGR_C(src, num_pixels & 15, dst);  // left-overs
 }

 static void ConvertBGRAToRGB(const uint32_t* src,
                              int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~15);
   for (; src < end; src += 16) {
     const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
     const uint8x16x3_t tmp = { { pixel.val[2], pixel.val[1], pixel.val[0] } };
     vst3q_u8(dst, tmp);
     dst += 48;
   }
   VP8LConvertBGRAToRGB_C(src, num_pixels & 15, dst);  // left-overs
 }

 #else  // WORK_AROUND_GCC

 // gcc-4.6.0 fallback

 static const uint8_t kRGBAShuffle[8] = { 2, 1, 0, 3, 6, 5, 4, 7 };

 static void ConvertBGRAToRGBA(const uint32_t* src,
                               int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~1);
   const uint8x8_t shuffle = vld1_u8(kRGBAShuffle);
   for (; src < end; src += 2) {
     const uint8x8_t pixels = vld1_u8((uint8_t*)src);
     vst1_u8(dst, vtbl1_u8(pixels, shuffle));
     dst += 8;
   }
   VP8LConvertBGRAToRGBA_C(src, num_pixels & 1, dst);  // left-overs
 }

 static const uint8_t kBGRShuffle[3][8] = {
   {  0,  1,  2,  4,  5,  6,  8,  9 },
   { 10, 12, 13, 14, 16, 17, 18, 20 },
   { 21, 22, 24, 25, 26, 28, 29, 30 }
 };

 static void ConvertBGRAToBGR(const uint32_t* src,
                              int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~7);
   const uint8x8_t shuffle0 = vld1_u8(kBGRShuffle[0]);
   const uint8x8_t shuffle1 = vld1_u8(kBGRShuffle[1]);
   const uint8x8_t shuffle2 = vld1_u8(kBGRShuffle[2]);
   for (; src < end; src += 8) {
     uint8x8x4_t pixels;
     INIT_VECTOR4(pixels,
                  vld1_u8((const uint8_t*)(src + 0)),
                  vld1_u8((const uint8_t*)(src + 2)),
                  vld1_u8((const uint8_t*)(src + 4)),
                  vld1_u8((const uint8_t*)(src + 6)));
     vst1_u8(dst +  0, vtbl4_u8(pixels, shuffle0));
     vst1_u8(dst +  8, vtbl4_u8(pixels, shuffle1));
     vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2));
     dst += 8 * 3;
   }
   VP8LConvertBGRAToBGR_C(src, num_pixels & 7, dst);  // left-overs
 }

 static const uint8_t kRGBShuffle[3][8] = {
   {  2,  1,  0,  6,  5,  4, 10,  9 },
   {  8, 14, 13, 12, 18, 17, 16, 22 },
   { 21, 20, 26, 25, 24, 30, 29, 28 }
 };

 static void ConvertBGRAToRGB(const uint32_t* src,
                              int num_pixels, uint8_t* dst) {
   const uint32_t* const end = src + (num_pixels & ~7);
   const uint8x8_t shuffle0 = vld1_u8(kRGBShuffle[0]);
   const uint8x8_t shuffle1 = vld1_u8(kRGBShuffle[1]);
   const uint8x8_t shuffle2 = vld1_u8(kRGBShuffle[2]);
   for (; src < end; src += 8) {
     uint8x8x4_t pixels;
     INIT_VECTOR4(pixels,
                  vld1_u8((const uint8_t*)(src + 0)),
                  vld1_u8((const uint8_t*)(src + 2)),
                  vld1_u8((const uint8_t*)(src + 4)),
                  vld1_u8((const uint8_t*)(src + 6)));
     vst1_u8(dst +  0, vtbl4_u8(pixels, shuffle0));
     vst1_u8(dst +  8, vtbl4_u8(pixels, shuffle1));
     vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2));
     dst += 8 * 3;
   }
   VP8LConvertBGRAToRGB_C(src, num_pixels & 7, dst);  // left-overs
 }

 #endif   // !WORK_AROUND_GCC

 //------------------------------------------------------------------------------
 // Subtract-Green Transform

 // vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
 // non-standard versions there.
 #if defined(__APPLE__) && defined(__aarch64__) && \
     defined(__apple_build_version__) && (__apple_build_version__< 6020037)
 #define USE_VTBLQ
 #endif

 #ifdef USE_VTBLQ
 // 255 = byte will be zeroed
 static const uint8_t kGreenShuffle[16] = {
   1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255
 };

 static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
                                              const uint8x16_t shuffle) {
   return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)),
                      vtbl1q_u8(argb, vget_high_u8(shuffle)));
 }
 #else  // !USE_VTBLQ
 // 255 = byte will be zeroed
 static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255  };

 static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
                                              const uint8x8_t shuffle) {
   return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
                      vtbl1_u8(vget_high_u8(argb), shuffle));
 }
 #endif  // USE_VTBLQ

 static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) {
   const uint32_t* const end = argb_data + (num_pixels & ~3);
 #ifdef USE_VTBLQ
   const uint8x16_t shuffle = vld1q_u8(kGreenShuffle);
 #else
   const uint8x8_t shuffle = vld1_u8(kGreenShuffle);
 #endif
   for (; argb_data < end; argb_data += 4) {
     const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data);
     const uint8x16_t greens = DoGreenShuffle(argb, shuffle);
     vst1q_u8((uint8_t*)argb_data, vaddq_u8(argb, greens));
   }
   // fallthrough and finish off with plain-C
   VP8LAddGreenToBlueAndRed_C(argb_data, num_pixels & 3);
 }

 //------------------------------------------------------------------------------
 // Color Transform

 static void TransformColorInverse(const VP8LMultipliers* const m,
                                   uint32_t* argb_data, int num_pixels) {
   // sign-extended multiplying constants, pre-shifted by 6.
 #define CST(X)  (((int16_t)(m->X << 8)) >> 6)
   const int16_t rb[8] = {
     CST(green_to_blue_), CST(green_to_red_),
     CST(green_to_blue_), CST(green_to_red_),
     CST(green_to_blue_), CST(green_to_red_),
     CST(green_to_blue_), CST(green_to_red_)
   };
   const int16x8_t mults_rb = vld1q_s16(rb);
   const int16_t b2[8] = {
     0, CST(red_to_blue_), 0, CST(red_to_blue_),
     0, CST(red_to_blue_), 0, CST(red_to_blue_),
   };
   const int16x8_t mults_b2 = vld1q_s16(b2);
 #undef CST
 #ifdef USE_VTBLQ
   static const uint8_t kg0g0[16] = {
     255, 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13
   };
   const uint8x16_t shuffle = vld1q_u8(kg0g0);
 #else
   static const uint8_t k0g0g[8] = { 255, 1, 255, 1, 255, 5, 255, 5 };
   const uint8x8_t shuffle = vld1_u8(k0g0g);
 #endif
   const uint32x4_t mask_ag = vdupq_n_u32(0xff00ff00u);
   int i;
   for (i = 0; i + 4 <= num_pixels; i += 4) {
     const uint8x16_t in = vld1q_u8((uint8_t*)(argb_data + i));
     const uint32x4_t a0g0 = vandq_u32(vreinterpretq_u32_u8(in), mask_ag);
     // 0 g 0 g
     const uint8x16_t greens = DoGreenShuffle(in, shuffle);
     // x dr  x db1
     const int16x8_t A = vqdmulhq_s16(vreinterpretq_s16_u8(greens), mults_rb);
     // x r'  x   b'
     const int8x16_t B = vaddq_s8(vreinterpretq_s8_u8(in),
                                  vreinterpretq_s8_s16(A));
     // r' 0   b' 0
     const int16x8_t C = vshlq_n_s16(vreinterpretq_s16_s8(B), 8);
     // x db2  0  0
     const int16x8_t D = vqdmulhq_s16(C, mults_b2);
     // 0  x db2  0
     const uint32x4_t E = vshrq_n_u32(vreinterpretq_u32_s16(D), 8);
     // r' x  b'' 0
     const int8x16_t F = vaddq_s8(vreinterpretq_s8_u32(E),
                                  vreinterpretq_s8_s16(C));
     // 0  r'  0  b''
     const uint16x8_t G = vshrq_n_u16(vreinterpretq_u16_s8(F), 8);
     const uint32x4_t out = vorrq_u32(vreinterpretq_u32_u16(G), a0g0);
     vst1q_u32(argb_data + i, out);
   }
   // Fall-back to C-version for left-overs.
   VP8LTransformColorInverse_C(m, argb_data + i, num_pixels - i);
 }

 #undef USE_VTBLQ

 //------------------------------------------------------------------------------
 // Entry point

 extern void VP8LDspInitNEON(void);

 WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitNEON(void) {
   VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA;
   VP8LConvertBGRAToBGR = ConvertBGRAToBGR;
   VP8LConvertBGRAToRGB = ConvertBGRAToRGB;

   VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed;
   VP8LTransformColorInverse = TransformColorInverse;
 }

 #else  // !WEBP_USE_NEON

 WEBP_DSP_INIT_STUB(VP8LDspInitNEON)

 #endif  // WEBP_USE_NEON
	// Copyright 2014 Google Inc. All Rights Reserved.
	//
	// Use of this source code is governed by a BSD-style license
	// that can be found in the COPYING file in the root of the source
	// tree. An additional intellectual property rights grant can be found
	// in the file PATENTS. All contributing project authors may
	// be found in the AUTHORS file in the root of the source tree.
	// -----------------------------------------------------------------------------
	//
	// NEON variant of methods for lossless decoder
	//
	// Author: Skal (pascal.massimino@gmail.com)

	#include "./dsp.h"

	#if defined(WEBP_USE_NEON)

	#include <arm_neon.h>

	#include "./lossless.h"
	#include "./neon.h"

	//------------------------------------------------------------------------------
	// Colorspace conversion functions

	#if !defined(WORK_AROUND_GCC)
	// gcc 4.6.0 had some trouble (NDK-r9) with this code. We only use it for
	// gcc-4.8.x at least.
	static void ConvertBGRAToRGBA(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~15);
	for (; src < end; src += 16) {
	uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
	// swap B and R. (VSWP d0,d2 has no intrinsics equivalent!)
	const uint8x16_t tmp = pixel.val[0];
	pixel.val[0] = pixel.val[2];
	pixel.val[2] = tmp;
	vst4q_u8(dst, pixel);
	dst += 64;
	}
	VP8LConvertBGRAToRGBA_C(src, num_pixels & 15, dst); // left-overs
	}

	static void ConvertBGRAToBGR(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~15);
	for (; src < end; src += 16) {
	const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
	const uint8x16x3_t tmp = { { pixel.val[0], pixel.val[1], pixel.val[2] } };
	vst3q_u8(dst, tmp);
	dst += 48;
	}
	VP8LConvertBGRAToBGR_C(src, num_pixels & 15, dst); // left-overs
	}

	static void ConvertBGRAToRGB(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~15);
	for (; src < end; src += 16) {
	const uint8x16x4_t pixel = vld4q_u8((uint8_t*)src);
	const uint8x16x3_t tmp = { { pixel.val[2], pixel.val[1], pixel.val[0] } };
	vst3q_u8(dst, tmp);
	dst += 48;
	}
	VP8LConvertBGRAToRGB_C(src, num_pixels & 15, dst); // left-overs
	}

	#else // WORK_AROUND_GCC

	// gcc-4.6.0 fallback

	static const uint8_t kRGBAShuffle[8] = { 2, 1, 0, 3, 6, 5, 4, 7 };

	static void ConvertBGRAToRGBA(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~1);
	const uint8x8_t shuffle = vld1_u8(kRGBAShuffle);
	for (; src < end; src += 2) {
	const uint8x8_t pixels = vld1_u8((uint8_t*)src);
	vst1_u8(dst, vtbl1_u8(pixels, shuffle));
	dst += 8;
	}
	VP8LConvertBGRAToRGBA_C(src, num_pixels & 1, dst); // left-overs
	}

	static const uint8_t kBGRShuffle[3][8] = {
	{ 0, 1, 2, 4, 5, 6, 8, 9 },
	{ 10, 12, 13, 14, 16, 17, 18, 20 },
	{ 21, 22, 24, 25, 26, 28, 29, 30 }
	};

	static void ConvertBGRAToBGR(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~7);
	const uint8x8_t shuffle0 = vld1_u8(kBGRShuffle[0]);
	const uint8x8_t shuffle1 = vld1_u8(kBGRShuffle[1]);
	const uint8x8_t shuffle2 = vld1_u8(kBGRShuffle[2]);
	for (; src < end; src += 8) {
	uint8x8x4_t pixels;
	INIT_VECTOR4(pixels,
	vld1_u8((const uint8_t*)(src + 0)),
	vld1_u8((const uint8_t*)(src + 2)),
	vld1_u8((const uint8_t*)(src + 4)),
	vld1_u8((const uint8_t*)(src + 6)));
	vst1_u8(dst + 0, vtbl4_u8(pixels, shuffle0));
	vst1_u8(dst + 8, vtbl4_u8(pixels, shuffle1));
	vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2));
	dst += 8 * 3;
	}
	VP8LConvertBGRAToBGR_C(src, num_pixels & 7, dst); // left-overs
	}

	static const uint8_t kRGBShuffle[3][8] = {
	{ 2, 1, 0, 6, 5, 4, 10, 9 },
	{ 8, 14, 13, 12, 18, 17, 16, 22 },
	{ 21, 20, 26, 25, 24, 30, 29, 28 }
	};

	static void ConvertBGRAToRGB(const uint32_t* src,
	int num_pixels, uint8_t* dst) {
	const uint32_t* const end = src + (num_pixels & ~7);
	const uint8x8_t shuffle0 = vld1_u8(kRGBShuffle[0]);
	const uint8x8_t shuffle1 = vld1_u8(kRGBShuffle[1]);
	const uint8x8_t shuffle2 = vld1_u8(kRGBShuffle[2]);
	for (; src < end; src += 8) {
	uint8x8x4_t pixels;
	INIT_VECTOR4(pixels,
	vld1_u8((const uint8_t*)(src + 0)),
	vld1_u8((const uint8_t*)(src + 2)),
	vld1_u8((const uint8_t*)(src + 4)),
	vld1_u8((const uint8_t*)(src + 6)));
	vst1_u8(dst + 0, vtbl4_u8(pixels, shuffle0));
	vst1_u8(dst + 8, vtbl4_u8(pixels, shuffle1));
	vst1_u8(dst + 16, vtbl4_u8(pixels, shuffle2));
	dst += 8 * 3;
	}
	VP8LConvertBGRAToRGB_C(src, num_pixels & 7, dst); // left-overs
	}

	#endif // !WORK_AROUND_GCC

	//------------------------------------------------------------------------------
	// Subtract-Green Transform

	// vtbl?_u8 are marked unavailable for iOS arm64 with Xcode < 6.3, use
	// non-standard versions there.
	#if defined(__APPLE__) && defined(__aarch64__) && \
	defined(__apple_build_version__) && (__apple_build_version__< 6020037)
	#define USE_VTBLQ
	#endif

	#ifdef USE_VTBLQ
	// 255 = byte will be zeroed
	static const uint8_t kGreenShuffle[16] = {
	1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13, 255
	};

	static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
	const uint8x16_t shuffle) {
	return vcombine_u8(vtbl1q_u8(argb, vget_low_u8(shuffle)),
	vtbl1q_u8(argb, vget_high_u8(shuffle)));
	}
	#else // !USE_VTBLQ
	// 255 = byte will be zeroed
	static const uint8_t kGreenShuffle[8] = { 1, 255, 1, 255, 5, 255, 5, 255 };

	static WEBP_INLINE uint8x16_t DoGreenShuffle(const uint8x16_t argb,
	const uint8x8_t shuffle) {
	return vcombine_u8(vtbl1_u8(vget_low_u8(argb), shuffle),
	vtbl1_u8(vget_high_u8(argb), shuffle));
	}
	#endif // USE_VTBLQ

	static void AddGreenToBlueAndRed(uint32_t* argb_data, int num_pixels) {
	const uint32_t* const end = argb_data + (num_pixels & ~3);
	#ifdef USE_VTBLQ
	const uint8x16_t shuffle = vld1q_u8(kGreenShuffle);
	#else
	const uint8x8_t shuffle = vld1_u8(kGreenShuffle);
	#endif
	for (; argb_data < end; argb_data += 4) {
	const uint8x16_t argb = vld1q_u8((uint8_t*)argb_data);
	const uint8x16_t greens = DoGreenShuffle(argb, shuffle);
	vst1q_u8((uint8_t*)argb_data, vaddq_u8(argb, greens));
	}
	// fallthrough and finish off with plain-C
	VP8LAddGreenToBlueAndRed_C(argb_data, num_pixels & 3);
	}

	//------------------------------------------------------------------------------
	// Color Transform

	static void TransformColorInverse(const VP8LMultipliers* const m,
	uint32_t* argb_data, int num_pixels) {
	// sign-extended multiplying constants, pre-shifted by 6.
	#define CST(X) (((int16_t)(m->X << 8)) >> 6)
	const int16_t rb[8] = {
	CST(green_to_blue_), CST(green_to_red_),
	CST(green_to_blue_), CST(green_to_red_),
	CST(green_to_blue_), CST(green_to_red_),
	CST(green_to_blue_), CST(green_to_red_)
	};
	const int16x8_t mults_rb = vld1q_s16(rb);
	const int16_t b2[8] = {
	0, CST(red_to_blue_), 0, CST(red_to_blue_),
	0, CST(red_to_blue_), 0, CST(red_to_blue_),
	};
	const int16x8_t mults_b2 = vld1q_s16(b2);
	#undef CST
	#ifdef USE_VTBLQ
	static const uint8_t kg0g0[16] = {
	255, 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255, 13, 255, 13
	};
	const uint8x16_t shuffle = vld1q_u8(kg0g0);
	#else
	static const uint8_t k0g0g[8] = { 255, 1, 255, 1, 255, 5, 255, 5 };
	const uint8x8_t shuffle = vld1_u8(k0g0g);
	#endif
	const uint32x4_t mask_ag = vdupq_n_u32(0xff00ff00u);
	int i;
	for (i = 0; i + 4 <= num_pixels; i += 4) {
	const uint8x16_t in = vld1q_u8((uint8_t*)(argb_data + i));
	const uint32x4_t a0g0 = vandq_u32(vreinterpretq_u32_u8(in), mask_ag);
	// 0 g 0 g
	const uint8x16_t greens = DoGreenShuffle(in, shuffle);
	// x dr x db1
	const int16x8_t A = vqdmulhq_s16(vreinterpretq_s16_u8(greens), mults_rb);
	// x r' x b'
	const int8x16_t B = vaddq_s8(vreinterpretq_s8_u8(in),
	vreinterpretq_s8_s16(A));
	// r' 0 b' 0
	const int16x8_t C = vshlq_n_s16(vreinterpretq_s16_s8(B), 8);
	// x db2 0 0
	const int16x8_t D = vqdmulhq_s16(C, mults_b2);
	// 0 x db2 0
	const uint32x4_t E = vshrq_n_u32(vreinterpretq_u32_s16(D), 8);
	// r' x b'' 0
	const int8x16_t F = vaddq_s8(vreinterpretq_s8_u32(E),
	vreinterpretq_s8_s16(C));
	// 0 r' 0 b''
	const uint16x8_t G = vshrq_n_u16(vreinterpretq_u16_s8(F), 8);
	const uint32x4_t out = vorrq_u32(vreinterpretq_u32_u16(G), a0g0);
	vst1q_u32(argb_data + i, out);
	}
	// Fall-back to C-version for left-overs.
	VP8LTransformColorInverse_C(m, argb_data + i, num_pixels - i);
	}

	#undef USE_VTBLQ

	//------------------------------------------------------------------------------
	// Entry point

	extern void VP8LDspInitNEON(void);

	WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitNEON(void) {
	VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA;
	VP8LConvertBGRAToBGR = ConvertBGRAToBGR;
	VP8LConvertBGRAToRGB = ConvertBGRAToRGB;

	VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed;
	VP8LTransformColorInverse = TransformColorInverse;
	}

	#else // !WEBP_USE_NEON

	WEBP_DSP_INIT_STUB(VP8LDspInitNEON)

	#endif // WEBP_USE_NEON