// Copyright 2022 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.

#include <assert.h>
#include <stddef.h>

#ifdef _WIN32
  #include <windows.h>
#else
  #include <pthread.h>
#endif

#include <xnnpack/common.h>
#include <xnnpack/config.h>
#include <xnnpack/microparams-init.h>
#include <xnnpack/transpose.h>
#include <xnnpack/vunary.h>


static struct xnn_transpose_config transpose_config = {0};

#if XNN_PLATFORM_WINDOWS
  static INIT_ONCE init_guard = INIT_ONCE_STATIC_INIT;
#else
  static pthread_once_t init_guard = PTHREAD_ONCE_INIT;
#endif

static void init_transpose_config(void) {
  #if XNN_ARCH_ARM
    const struct xnn_hardware_config* hardware_config = xnn_init_hardware_config();
    assert(hardware_config != NULL);

    if (hardware_config->use_arm_neon) {
      transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
      transpose_config.x8 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__16x16_reuse_dec_zip_neon,
        .tile_size = 32,
      };
      transpose_config.x16 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__8x8_reuse_dec_zip_neon,
        .tile_size = 32,
      };
      transpose_config.x24 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__2x2_neon_tbl64,
        .init.x24 = (xnn_init_x24_transpose_params_fn) xnn_init_x24_transpose_neon_tbl64_params,
        .tile_size = 32,
      };
      transpose_config.x32 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__4x4_reuse_dec_zip_neon,
        .tile_size = 32,
      };
      transpose_config.xx = (struct xnn_transpose_subconfig) {
        .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
        .tile_size = 32,
      };
    } else if (!XNN_PLATFORM_MOBILE) {
      transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
      transpose_config.x8 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__2x4_scalar_int,
        .tile_size = 32,
      };
      transpose_config.x16 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__2x4_scalar_int,
        .tile_size = 32,
      };
      transpose_config.x24 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__1x2_scalar,
        .tile_size = 32,
      };
      transpose_config.x32 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__2x4_scalar_int,
        .tile_size = 32,
      };
      transpose_config.xx = (struct xnn_transpose_subconfig) {
        .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
        .tile_size = 32,
      };
    }
  #elif XNN_ARCH_ARM64
    transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
    transpose_config.x8 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__16x16_reuse_dec_zip_neon,
      .tile_size = 32,
    };
    transpose_config.x16 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__8x8_reuse_dec_zip_neon,
      .tile_size = 32,
    };
    transpose_config.x24 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__4x4_aarch64_neon_tbl128,
      .init.x24 = (xnn_init_x24_transpose_params_fn) xnn_init_x24_transpose_neon_tbl128_params,
      .tile_size = 32,
    };
    transpose_config.x32 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__4x4_aarch64_neon_tbl128,
      .tile_size = 32,
      .init.x32 = (xnn_init_x32_transpose_params_fn) xnn_init_x32_transpose_neon_tbl128_params,
    };
    transpose_config.xx = (struct xnn_transpose_subconfig) {
      .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
      .tile_size = 32,
    };
  #elif XNN_ARCH_X86 || XNN_ARCH_X86_64
    const struct xnn_hardware_config* hardware_config = xnn_init_hardware_config();
    assert(hardware_config != NULL);

    transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
    transpose_config.xx = (struct xnn_transpose_subconfig) {
      .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
      .tile_size = 32,
    };
    transpose_config.x8 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__16x16_reuse_mov_sse2,
      .tile_size = 32,
    };
    transpose_config.x16 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__8x8_reuse_multi_sse2,
      .tile_size = 32,
    };
    transpose_config.x24 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__1x2_scalar,
      .tile_size = 32,
    };
    transpose_config.x32 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__4x4_sse,
      .tile_size = 32,
    };
    if (hardware_config->use_x86_ssse3) {
      transpose_config.x24 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__4x4_ssse3,
        .init.x24 = (xnn_init_x24_transpose_params_fn) xnn_init_x24_transpose_ssse3_params,
        .tile_size = 32,
      };
    }
    if (hardware_config->use_x86_avx) {
      transpose_config.x32 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__8x8_reuse_multi_avx,
        .init.x32 = (xnn_init_x32_transpose_params_fn) xnn_init_x32_transpose_avx_params,
        .tile_size = 32,
      };
    }
    if (hardware_config->use_x86_avx2) {
      transpose_config.x8 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__32x32_reuse_switch_avx2,
        .init.x8 = (xnn_init_x8_transpose_params_fn) xnn_init_x8_transpose_avx2_params,
        .tile_size = 32,
      };
      transpose_config.x16 = (struct xnn_transpose_subconfig) {
        .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__16x16_reuse_switch_avx2,
        .init.x16 = (xnn_init_x16_transpose_params_fn) xnn_init_x16_transpose_avx2_params,
        .tile_size = 32,
      };
    }
  #elif XNN_ARCH_WASMSIMD || XNN_ARCH_WASMRELAXEDSIMD
    transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
    transpose_config.x8 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__16x16_reuse_mov_wasmsimd,
      .tile_size = 32,
    };
    transpose_config.x16 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__8x8_reuse_mov_wasmsimd,
      .tile_size = 32,
    };
    transpose_config.x24 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__1x2_scalar,
      .tile_size = 32,
    };
    transpose_config.x32 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__4x4_reuse_mov_wasmsimd,
      .tile_size = 32,
    };
    transpose_config.xx = (struct xnn_transpose_subconfig) {
      .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
      .tile_size = 32,
    };
  #elif XNN_ARCH_WASM
    transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
    transpose_config.x8 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.x16 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.x24 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__1x2_scalar,
      .tile_size = 32,
    };
    transpose_config.x32 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.xx = (struct xnn_transpose_subconfig) {
      .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
      .tile_size = 32,
    };
  #elif XNN_ARCH_RISCV
    transpose_config.copy = (xnn_vunary_ukernel_fn) xnn_xx_copy_ukernel__scalar_memcpy;
    transpose_config.x8 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x8_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.x16 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x16_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.x24 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x24_transposec_ukernel__1x2_scalar,
      .tile_size = 32,
    };
    transpose_config.x32 = (struct xnn_transpose_subconfig) {
      .const_size_ukernel = (xnn_transposec_ukernel_fn) xnn_x32_transposec_ukernel__2x4_scalar_int,
      .tile_size = 32,
    };
    transpose_config.xx = (struct xnn_transpose_subconfig) {
      .variable_size_ukernel = xnn_xx_transposev_ukernel__1x1_scalar_memcpy,
      .tile_size = 32,
    };
  #else
    #error "Unsupported architecture"
  #endif
}

#if XNN_PLATFORM_WINDOWS
  static BOOL CALLBACK init_transpose_config_windows(PINIT_ONCE init_once, PVOID parameter, PVOID* context) {
    init_transpose_config();
    return TRUE;
  }
#endif

const struct xnn_transpose_config* xnn_init_transpose_config() {
  const struct xnn_hardware_config* hardware_config = xnn_init_hardware_config();
  if (hardware_config == NULL) {
    return NULL;
  }
  #if XNN_PLATFORM_WINDOWS
    InitOnceExecuteOnce(&init_guard, &init_transpose_config_windows, NULL, NULL);
  #else
    pthread_once(&init_guard, &init_transpose_config);
  #endif
  return &transpose_config;
}