dispatch.h

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#pragma once
 
#include <stddef.h>
#include <stdint.h>
#include <libplatform/cpu.h>

typedef void (*simd_luminance_fn)(const uint8_t *rgb, uint8_t *out, size_t count);
typedef struct {
  const char *name;
  uint32_t required_features;
  simd_luminance_fn luminance;
} simd_backend_t;

const simd_backend_t *simd_select_backend(uint32_t features);
const simd_backend_t *simd_backend(void);
void simd_luminance_scalar(const uint8_t *rgb, uint8_t *out, size_t count);
void simd_luminance_sse2(const uint8_t *rgb, uint8_t *out, size_t count);
void simd_luminance_ssse3(const uint8_t *rgb, uint8_t *out, size_t count);
void simd_luminance_avx2(const uint8_t *rgb, uint8_t *out, size_t count);
void simd_luminance_neon(const uint8_t *rgb, uint8_t *out, size_t count);
void simd_luminance_sve(const uint8_t *rgb, uint8_t *out, size_t count);