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-exception 6// 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_H 15#define INT_LIB_H 16 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 definitions 22 23#if __ARM_EABI__ 24#if defined(COMPILER_RT_ARMHF_TARGET) || (!defined(__clang__) && \ 25 defined(__GNUC__) && (__GNUC__ < 4 || __GNUC__ == 4 && __GNUC_MINOR__ < 5)) 26// The pcs attribute was introduced in GCC 4.5.0 27#define COMPILER_RT_ABI 28#else 29#define COMPILER_RT_ABI __attribute__((__pcs__("aapcs"))) 30#endif 31#else 32#define COMPILER_RT_ABI 33#endif 34 35#define AEABI_RTABI __attribute__((__pcs__("aapcs"))) 36 37#if defined(_MSC_VER) && !defined(__clang__) 38#define ALWAYS_INLINE __forceinline 39#define NOINLINE __declspec(noinline) 40#define NORETURN __declspec(noreturn) 41#define UNUSED 42#else 43#define ALWAYS_INLINE __attribute__((always_inline)) 44#define NOINLINE __attribute__((noinline)) 45#define NORETURN __attribute__((noreturn)) 46#define UNUSED __attribute__((unused)) 47#endif 48 49#define STR(a) #a 50#define XSTR(a) STR(a) 51#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name 52 53#if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) || \ 54 defined(_AIX) 55#define COMPILER_RT_ALIAS(name, aliasname) \ 56 COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name))); 57#elif defined(__APPLE__) 58#if defined(VISIBILITY_HIDDEN) 59#define COMPILER_RT_ALIAS_VISIBILITY(name) \ 60 __asm__(".private_extern " SYMBOL_NAME(name)); 61#else 62#define COMPILER_RT_ALIAS_VISIBILITY(name) 63#endif 64#define COMPILER_RT_ALIAS(name, aliasname) \ 65 __asm__(".globl " SYMBOL_NAME(aliasname)); \ 66 COMPILER_RT_ALIAS_VISIBILITY(aliasname) \ 67 __asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \ 68 COMPILER_RT_ABI __typeof(name) aliasname; 69#elif defined(_WIN32) 70#define COMPILER_RT_ALIAS(name, aliasname) 71#else 72#error Unsupported target 73#endif 74 75#if (defined(__FreeBSD__) || defined(__NetBSD__)) && (defined(_KERNEL) || defined(_STANDALONE)) 76// 77// Kernel and boot environment can't use normal headers, 78// so use the equivalent system headers. 79// 80#ifdef __FreeBSD__ 81#include <sys/limits.h> 82#else 83#include <machine/limits.h> 84#endif 85#include <sys/stdint.h> 86#include <sys/types.h> 87#else 88// Include the standard compiler builtin headers we use functionality from. 89#include <float.h> 90#include <limits.h> 91#include <stdbool.h> 92#include <stdint.h> 93#endif 94 95// Include the commonly used internal type definitions. 96#include "int_types.h" 97 98// Include internal utility function declarations. 99#include "int_util.h" 100 101COMPILER_RT_ABI int __paritysi2(si_int a); 102COMPILER_RT_ABI int __paritydi2(di_int a); 103 104COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b); 105COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b); 106COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d); 107 108COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int *rem); 109COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem); 110#ifdef CRT_HAS_128BIT 111COMPILER_RT_ABI int __clzti2(ti_int a); 112COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int *rem); 113#endif 114 115// Definitions for builtins unavailable on MSVC 116#if defined(_MSC_VER) && !defined(__clang__) 117#include <intrin.h> 118 119int __inline __builtin_ctz(uint32_t value) { 120 unsigned long trailing_zero = 0; 121 if (_BitScanForward(&trailing_zero, value)) 122 return trailing_zero; 123 return 32; 124} 125 126int __inline __builtin_clz(uint32_t value) { 127 unsigned long leading_zero = 0; 128 if (_BitScanReverse(&leading_zero, value)) 129 return 31 - leading_zero; 130 return 32; 131} 132 133#if defined(_M_ARM) || defined(_M_X64) 134int __inline __builtin_clzll(uint64_t value) { 135 unsigned long leading_zero = 0; 136 if (_BitScanReverse64(&leading_zero, value)) 137 return 63 - leading_zero; 138 return 64; 139} 140#else 141int __inline __builtin_clzll(uint64_t value) { 142 if (value == 0) 143 return 64; 144 uint32_t msh = (uint32_t)(value >> 32); 145 uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF); 146 if (msh != 0) 147 return __builtin_clz(msh); 148 return 32 + __builtin_clz(lsh); 149} 150#endif 151 152#define __builtin_clzl __builtin_clzll 153#endif // defined(_MSC_VER) && !defined(__clang__) 154 155#endif // INT_LIB_H 156