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// 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/lut.h>
static struct xnn_x8_lut_config x8_lut_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_x8_lut_config(void) {
#if XNN_ARCH_ARM
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x4;
x8_lut_config.tile_size = 4;
#elif XNN_ARCH_ARM64
x8_lut_config.microkernel = xnn_x8_lut_ukernel__aarch64_neon_tbx128x4_x64;
x8_lut_config.tile_size = 64;
#elif XNN_ARCH_X86 || XNN_ARCH_X86_64
const struct xnn_hardware_config* hardware_config = xnn_init_hardware_config();
assert(hardware_config != NULL);
if (!XNN_PLATFORM_MOBILE && hardware_config->use_x86_avx512skx) {
if (hardware_config->use_x86_avx512vbmi) {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__avx512vbmi_vpermx2b_x128;
x8_lut_config.tile_size = 128;
} else {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__avx512skx_vpshufb_x64;
x8_lut_config.tile_size = 64;
}
} else if (hardware_config->use_x86_avx2) {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__avx2_x128;
x8_lut_config.tile_size = 128;
} else if (hardware_config->use_x86_avx) {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__avx_x64;
x8_lut_config.tile_size = 64;
} else {
// Note: SSSE3 version is usually slower than scalar
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x4;
x8_lut_config.tile_size = 4;
}
#elif XNN_ARCH_WASMSIMD || XNN_ARCH_WASMRELAXEDSIMD
const struct xnn_hardware_config* hardware_config = xnn_init_hardware_config();
assert(hardware_config != NULL);
if (hardware_config->is_x86) {
#if XNN_ARCH_WASMRELAXEDSIMD
if (hardware_config->use_wasm_pshufb) {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__wasmpshufb_x32;
x8_lut_config.tile_size = 32;
} else {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x1;
x8_lut_config.tile_size = 1;
}
#else
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x1;
x8_lut_config.tile_size = 1;
#endif
} else {
x8_lut_config.microkernel = xnn_x8_lut_ukernel__wasmsimd_x32;
x8_lut_config.tile_size = 32;
}
#elif XNN_ARCH_WASM
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x1;
x8_lut_config.tile_size = 1;
#elif XNN_ARCH_RISCV
x8_lut_config.microkernel = xnn_x8_lut_ukernel__scalar_x4;
x8_lut_config.tile_size = 4;
#else
#error "Unsupported architecture"
#endif
}
#if XNN_PLATFORM_WINDOWS
static BOOL CALLBACK init_x8_lut_config_windows(PINIT_ONCE init_once, PVOID parameter, PVOID* context) {
init_x8_lut_config();
return TRUE;
}
#endif
const struct xnn_x8_lut_config* xnn_init_x8_lut_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_x8_lut_config_windows, NULL, NULL);
#else
pthread_once(&init_guard, &init_x8_lut_config);
#endif
return &x8_lut_config;
}
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