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