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1//===-- int_lib.h - configuration header for compiler-rt -----------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file is a configuration header for compiler-rt.10// This file is not part of the interface of this library.11//12//===----------------------------------------------------------------------===//13 14#ifndef INT_LIB_H15#define INT_LIB_H16 17// Assumption: Signed integral is 2's complement.18// Assumption: Right shift of signed negative is arithmetic shift.19// Assumption: Endianness is little or big (not mixed).20 21// ABI macro definitions22 23#if __ARM_EABI__24#ifdef COMPILER_RT_ARMHF_TARGET25#define COMPILER_RT_ABI26#else27#define COMPILER_RT_ABI __attribute__((__pcs__("aapcs")))28#endif29#else30#define COMPILER_RT_ABI31#endif32 33#define AEABI_RTABI __attribute__((__pcs__("aapcs")))34 35#if defined(_MSC_VER) && !defined(__clang__)36#define ALWAYS_INLINE __forceinline37#define NOINLINE __declspec(noinline)38#define NORETURN __declspec(noreturn)39#define UNUSED40#else41#define ALWAYS_INLINE __attribute__((always_inline))42#define NOINLINE __attribute__((noinline))43#define NORETURN __attribute__((noreturn))44#define UNUSED __attribute__((unused))45#endif46 47#define STR(a) #a48#define XSTR(a) STR(a)49#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name50 51#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) || \52 defined(_AIX) || defined(__CYGWIN__)53#define COMPILER_RT_ALIAS(name, aliasname) \54 COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name)));55#elif defined(__APPLE__)56#if defined(VISIBILITY_HIDDEN)57#define COMPILER_RT_ALIAS_VISIBILITY(name) \58 __asm__(".private_extern " SYMBOL_NAME(name));59#else60#define COMPILER_RT_ALIAS_VISIBILITY(name)61#endif62#define COMPILER_RT_ALIAS(name, aliasname) \63 __asm__(".globl " SYMBOL_NAME(aliasname)); \64 COMPILER_RT_ALIAS_VISIBILITY(aliasname) \65 __asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \66 COMPILER_RT_ABI __typeof(name) aliasname;67#elif defined(_WIN32) || defined(__UEFI__)68#define COMPILER_RT_ALIAS(name, aliasname)69#else70#error Unsupported target71#endif72 73#if (defined(__FreeBSD__) || defined(__NetBSD__)) && \74 (defined(_KERNEL) || defined(_STANDALONE))75//76// Kernel and boot environment can't use normal headers,77// so use the equivalent system headers.78// NB: FreeBSD (and OpenBSD) deprecate machine/limits.h in79// favour of sys/limits.h, so prefer the former, but fall80// back on the latter if not available since NetBSD only has81// the latter.82//83#if defined(__has_include) && __has_include(<sys/limits.h>)84#include <sys/limits.h>85#else86#include <machine/limits.h>87#endif88#include <sys/stdint.h>89#include <sys/types.h>90#else91// Include the standard compiler builtin headers we use functionality from.92#include <float.h>93#include <limits.h>94#include <stdbool.h>95#include <stdint.h>96#endif97 98// Include the commonly used internal type definitions.99#include "int_types.h"100 101// Include internal utility function declarations.102#include "int_util.h"103 104COMPILER_RT_ABI int __paritysi2(si_int a);105COMPILER_RT_ABI int __paritydi2(di_int a);106 107COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b);108COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b);109COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d);110 111COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int *rem);112COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem);113#ifdef CRT_HAS_128BIT114COMPILER_RT_ABI int __clzti2(ti_int a);115COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int *rem);116#endif117 118// Definitions for builtins unavailable on MSVC119#if defined(_MSC_VER) && !defined(__clang__)120#include <intrin.h>121 122static int __inline __builtin_ctz(uint32_t value) {123 unsigned long trailing_zero = 0;124 if (_BitScanForward(&trailing_zero, value))125 return trailing_zero;126 return 32;127}128 129static int __inline __builtin_clz(uint32_t value) {130 unsigned long leading_zero = 0;131 if (_BitScanReverse(&leading_zero, value))132 return 31 - leading_zero;133 return 32;134}135 136#if defined(_M_ARM) || defined(_M_X64)137static int __inline __builtin_clzll(uint64_t value) {138 unsigned long leading_zero = 0;139 if (_BitScanReverse64(&leading_zero, value))140 return 63 - leading_zero;141 return 64;142}143#else144static int __inline __builtin_clzll(uint64_t value) {145 if (value == 0)146 return 64;147 uint32_t msh = (uint32_t)(value >> 32);148 uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF);149 if (msh != 0)150 return __builtin_clz(msh);151 return 32 + __builtin_clz(lsh);152}153#endif154 155#define __builtin_clzl __builtin_clzll156 157static bool __inline __builtin_sadd_overflow(int x, int y, int *result) {158 if ((x < 0) != (y < 0)) {159 *result = x + y;160 return false;161 }162 int tmp = (unsigned int)x + (unsigned int)y;163 if ((tmp < 0) != (x < 0))164 return true;165 *result = tmp;166 return false;167}168 169#endif // defined(_MSC_VER) && !defined(__clang__)170 171#endif // INT_LIB_H172