1 /* ===-- int_lib.h - configuration header for compiler-rt -----------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 * 10 * This file is a configuration header for compiler-rt. 11 * This file is not part of the interface of this library. 12 * 13 * ===----------------------------------------------------------------------=== 14 */ 15 16 #ifndef INT_LIB_H 17 #define INT_LIB_H 18 19 /* Assumption: Signed integral is 2's complement. */ 20 /* Assumption: Right shift of signed negative is arithmetic shift. */ 21 /* Assumption: Endianness is little or big (not mixed). */ 22 23 #if defined(__ELF__) 24 #define FNALIAS(alias_name, original_name) \ 25 void alias_name() __attribute__((alias(#original_name))) 26 #else 27 #define FNALIAS(alias, name) _Pragma("GCC error(\"alias unsupported on this file format\")") 28 #endif 29 30 /* ABI macro definitions */ 31 32 #if __ARM_EABI__ 33 # define ARM_EABI_FNALIAS(aeabi_name, name) \ 34 void __aeabi_##aeabi_name() __attribute__((alias("__" #name))); 35 # define COMPILER_RT_ABI __attribute__((pcs("aapcs"))) 36 #else 37 # define ARM_EABI_FNALIAS(aeabi_name, name) 38 # if defined(__arm__) && defined(_WIN32) && (!defined(_MSC_VER) || defined(__clang__)) 39 # define COMPILER_RT_ABI __attribute__((pcs("aapcs"))) 40 # else 41 # define COMPILER_RT_ABI 42 # endif 43 #endif 44 45 #ifdef _MSC_VER 46 #define ALWAYS_INLINE __forceinline 47 #define NOINLINE __declspec(noinline) 48 #define NORETURN __declspec(noreturn) 49 #define UNUSED 50 #else 51 #define ALWAYS_INLINE __attribute__((always_inline)) 52 #define NOINLINE __attribute__((noinline)) 53 #define NORETURN __attribute__((noreturn)) 54 #define UNUSED __attribute__((unused)) 55 #endif 56 57 #if defined(__NetBSD__) && (defined(_KERNEL) || defined(_STANDALONE)) 58 /* 59 * Kernel and boot environment can't use normal headers, 60 * so use the equivalent system headers. 61 */ 62 # include <machine/limits.h> 63 # include <sys/stdint.h> 64 # include <sys/types.h> 65 #else 66 /* Include the standard compiler builtin headers we use functionality from. */ 67 # include <limits.h> 68 # include <stdint.h> 69 # include <stdbool.h> 70 # include <float.h> 71 #endif 72 73 /* Include the commonly used internal type definitions. */ 74 #include "int_types.h" 75 76 /* Include internal utility function declarations. */ 77 #include "int_util.h" 78 79 COMPILER_RT_ABI si_int __paritysi2(si_int a); 80 COMPILER_RT_ABI si_int __paritydi2(di_int a); 81 82 COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b); 83 COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b); 84 COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d); 85 86 COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int* rem); 87 COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int* rem); 88 #ifdef CRT_HAS_128BIT 89 COMPILER_RT_ABI si_int __clzti2(ti_int a); 90 COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem); 91 #endif 92 93 /* Definitions for builtins unavailable on MSVC */ 94 #if defined(_MSC_VER) && !defined(__clang__) 95 #include <intrin.h> 96 97 uint32_t __inline __builtin_ctz(uint32_t value) { 98 uint32_t trailing_zero = 0; 99 if (_BitScanForward(&trailing_zero, value)) 100 return trailing_zero; 101 return 32; 102 } 103 104 uint32_t __inline __builtin_clz(uint32_t value) { 105 uint32_t leading_zero = 0; 106 if (_BitScanReverse(&leading_zero, value)) 107 return 31 - leading_zero; 108 return 32; 109 } 110 111 #if defined(_M_ARM) || defined(_M_X64) 112 uint32_t __inline __builtin_clzll(uint64_t value) { 113 uint32_t leading_zero = 0; 114 if (_BitScanReverse64(&leading_zero, value)) 115 return 63 - leading_zero; 116 return 64; 117 } 118 #else 119 uint32_t __inline __builtin_clzll(uint64_t value) { 120 if (value == 0) 121 return 64; 122 uint32_t msh = (uint32_t)(value >> 32); 123 uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF); 124 if (msh != 0) 125 return __builtin_clz(msh); 126 return 32 + __builtin_clz(lsh); 127 } 128 #endif 129 130 #define __builtin_clzl __builtin_clzll 131 #endif // defined(_MSC_VER) && !defined(__clang__) 132 133 #endif /* INT_LIB_H */ 134
