// Copyright 2017 Google LLC
// Copyright 2020 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef CPU_FEATURES_INCLUDE_CPUINFO_X86_H_
#define CPU_FEATURES_INCLUDE_CPUINFO_X86_H_

#include "cpu_features_cache_info.h"
#include "cpu_features_macros.h"

CPU_FEATURES_START_CPP_NAMESPACE

// CPUID Vendors
#define CPU_FEATURES_VENDOR_GENUINE_INTEL "GenuineIntel"
#define CPU_FEATURES_VENDOR_AUTHENTIC_AMD "AuthenticAMD"
#define CPU_FEATURES_VENDOR_HYGON_GENUINE "HygonGenuine"

// See https://en.wikipedia.org/wiki/CPUID for a list of x86 cpu features.
// The field names are based on the short name provided in the wikipedia tables.
typedef struct {
  int fpu : 1;
  int tsc : 1;
  int cx8 : 1;
  int clfsh : 1;
  int mmx : 1;
  int aes : 1;
  int erms : 1;
  int f16c : 1;
  int fma4 : 1;
  int fma3 : 1;
  int vaes : 1;
  int vpclmulqdq : 1;
  int bmi1 : 1;
  int hle : 1;
  int bmi2 : 1;
  int rtm : 1;
  int rdseed : 1;
  int clflushopt : 1;
  int clwb : 1;

  int sse : 1;
  int sse2 : 1;
  int sse3 : 1;
  int ssse3 : 1;
  int sse4_1 : 1;
  int sse4_2 : 1;
  int sse4a : 1;

  int avx : 1;
  int avx2 : 1;

  int avx512f : 1;
  int avx512cd : 1;
  int avx512er : 1;
  int avx512pf : 1;
  int avx512bw : 1;
  int avx512dq : 1;
  int avx512vl : 1;
  int avx512ifma : 1;
  int avx512vbmi : 1;
  int avx512vbmi2 : 1;
  int avx512vnni : 1;
  int avx512bitalg : 1;
  int avx512vpopcntdq : 1;
  int avx512_4vnniw : 1;
  int avx512_4vbmi2 : 1;
  int avx512_second_fma : 1;
  int avx512_4fmaps : 1;
  int avx512_bf16 : 1;
  int avx512_vp2intersect : 1;
  int amx_bf16 : 1;
  int amx_tile : 1;
  int amx_int8 : 1;

  int pclmulqdq : 1;
  int smx : 1;
  int sgx : 1;
  int cx16 : 1;  // aka. CMPXCHG16B
  int sha : 1;
  int popcnt : 1;
  int movbe : 1;
  int rdrnd : 1;

  int dca : 1;
  int ss : 1;
  int adx : 1;
  // Make sure to update X86FeaturesEnum below if you add a field here.
} X86Features;

typedef struct {
  X86Features features;
  int family;
  int model;
  int stepping;
  char vendor[13];  // 0 terminated string
} X86Info;

// Calls cpuid and returns an initialized X86info.
X86Info GetX86Info(void);

// Returns cache hierarchy informations.
// Can call cpuid multiple times.
// Only works on Intel CPU at the moment.
CacheInfo GetX86CacheInfo(void);

typedef enum {
  X86_UNKNOWN,
  INTEL_80486,       // 80486
  INTEL_P5,          // P5
  INTEL_LAKEMONT,    // LAKEMONT
  INTEL_CORE,        // CORE
  INTEL_PNR,         // PENRYN
  INTEL_NHM,         // NEHALEM
  INTEL_ATOM_BNL,    // BONNELL
  INTEL_WSM,         // WESTMERE
  INTEL_SNB,         // SANDYBRIDGE
  INTEL_IVB,         // IVYBRIDGE
  INTEL_ATOM_SMT,    // SILVERMONT
  INTEL_HSW,         // HASWELL
  INTEL_BDW,         // BROADWELL
  INTEL_SKL,         // SKYLAKE
  INTEL_ATOM_GMT,    // GOLDMONT
  INTEL_KBL,         // KABY LAKE
  INTEL_CFL,         // COFFEE LAKE
  INTEL_WHL,         // WHISKEY LAKE
  INTEL_CNL,         // CANNON LAKE
  INTEL_ICL,         // ICE LAKE
  INTEL_TGL,         // TIGER LAKE
  INTEL_SPR,         // SAPPHIRE RAPIDS
  INTEL_ADL,         // ALDER LAKE
  INTEL_RCL,         // ROCKET LAKE
  INTEL_KNIGHTS_M,   // KNIGHTS MILL
  INTEL_KNIGHTS_L,   // KNIGHTS LANDING
  INTEL_KNIGHTS_F,   // KNIGHTS FERRY
  INTEL_KNIGHTS_C,   // KNIGHTS CORNER
  INTEL_NETBURST,    // NETBURST
  AMD_HAMMER,        // K8  HAMMER
  AMD_K10,           // K10
  AMD_K11,           // K11
  AMD_K12,           // K12
  AMD_BOBCAT,        // K14 BOBCAT
  AMD_PILEDRIVER,    // K15 PILEDRIVER
  AMD_STREAMROLLER,  // K15 STREAMROLLER
  AMD_EXCAVATOR,     // K15 EXCAVATOR
  AMD_BULLDOZER,     // K15 BULLDOZER
  AMD_JAGUAR,        // K16 JAGUAR
  AMD_PUMA,          // K16 PUMA
  AMD_ZEN,           // K17 ZEN
  AMD_ZEN_PLUS,      // K17 ZEN+
  AMD_ZEN2,          // K17 ZEN 2
  AMD_ZEN3,          // K19 ZEN 3
  X86_MICROARCHITECTURE_LAST_,
} X86Microarchitecture;

// Returns the underlying microarchitecture by looking at X86Info's vendor,
// family and model.
X86Microarchitecture GetX86Microarchitecture(const X86Info* info);

// Calls cpuid and fills the brand_string.
// - brand_string *must* be of size 49 (beware of array decaying).
// - brand_string will be zero terminated.
void FillX86BrandString(char brand_string[49]);

////////////////////////////////////////////////////////////////////////////////
// Introspection functions

typedef enum {
  X86_FPU,
  X86_TSC,
  X86_CX8,
  X86_CLFSH,
  X86_MMX,
  X86_AES,
  X86_ERMS,
  X86_F16C,
  X86_FMA4,
  X86_FMA3,
  X86_VAES,
  X86_VPCLMULQDQ,
  X86_BMI1,
  X86_HLE,
  X86_BMI2,
  X86_RTM,
  X86_RDSEED,
  X86_CLFLUSHOPT,
  X86_CLWB,
  X86_SSE,
  X86_SSE2,
  X86_SSE3,
  X86_SSSE3,
  X86_SSE4_1,
  X86_SSE4_2,
  X86_SSE4A,
  X86_AVX,
  X86_AVX2,
  X86_AVX512F,
  X86_AVX512CD,
  X86_AVX512ER,
  X86_AVX512PF,
  X86_AVX512BW,
  X86_AVX512DQ,
  X86_AVX512VL,
  X86_AVX512IFMA,
  X86_AVX512VBMI,
  X86_AVX512VBMI2,
  X86_AVX512VNNI,
  X86_AVX512BITALG,
  X86_AVX512VPOPCNTDQ,
  X86_AVX512_4VNNIW,
  X86_AVX512_4VBMI2,
  X86_AVX512_SECOND_FMA,
  X86_AVX512_4FMAPS,
  X86_AVX512_BF16,
  X86_AVX512_VP2INTERSECT,
  X86_AMX_BF16,
  X86_AMX_TILE,
  X86_AMX_INT8,
  X86_PCLMULQDQ,
  X86_SMX,
  X86_SGX,
  X86_CX16,
  X86_SHA,
  X86_POPCNT,
  X86_MOVBE,
  X86_RDRND,
  X86_DCA,
  X86_SS,
  X86_ADX,
  X86_LAST_,
} X86FeaturesEnum;

int GetX86FeaturesEnumValue(const X86Features* features, X86FeaturesEnum value);

const char* GetX86FeaturesEnumName(X86FeaturesEnum);

const char* GetX86MicroarchitectureName(X86Microarchitecture);

CPU_FEATURES_END_CPP_NAMESPACE

#if !defined(CPU_FEATURES_ARCH_X86)
#error "Including cpuinfo_x86.h from a non-x86 target."
#endif

#endif  // CPU_FEATURES_INCLUDE_CPUINFO_X86_H_