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 #define COMPILER_RT_ALIAS(aliasee) __attribute__((__alias__(#aliasee))) 27 #else 28 #define FNALIAS(alias, name) _Pragma("GCC error(\"alias unsupported on this file format\")") 29 #define COMPILER_RT_ALIAS(aliasee) _Pragma("GCC error(\"alias unsupported on this file format\")") 30 #endif 31 32 /* ABI macro definitions */ 33 34 #if __ARM_EABI__ 35 # ifdef COMPILER_RT_ARMHF_TARGET 36 # define COMPILER_RT_ABI 37 # else 38 # define COMPILER_RT_ABI __attribute__((__pcs__("aapcs"))) 39 # endif 40 #else 41 # define COMPILER_RT_ABI 42 #endif 43 44 #define AEABI_RTABI __attribute__((__pcs__("aapcs"))) 45 46 #ifdef _MSC_VER 47 #define ALWAYS_INLINE __forceinline 48 #define NOINLINE __declspec(noinline) 49 #define NORETURN __declspec(noreturn) 50 #define UNUSED 51 #else 52 #define ALWAYS_INLINE __attribute__((always_inline)) 53 #define NOINLINE __attribute__((noinline)) 54 #define NORETURN __attribute__((noreturn)) 55 #define UNUSED __attribute__((unused)) 56 #endif 57 58 #if defined(__NetBSD__) && (defined(_KERNEL) || defined(_STANDALONE)) 59 /* 60 * Kernel and boot environment can't use normal headers, 61 * so use the equivalent system headers. 62 */ 63 # include <machine/limits.h> 64 # include <sys/stdint.h> 65 # include <sys/types.h> 66 #else 67 /* Include the standard compiler builtin headers we use functionality from. */ 68 # include <limits.h> 69 # include <stdint.h> 70 # include <stdbool.h> 71 # include <float.h> 72 #endif 73 74 /* Include the commonly used internal type definitions. */ 75 #include "int_types.h" 76 77 /* Include internal utility function declarations. */ 78 #include "int_util.h" 79 80 COMPILER_RT_ABI si_int __paritysi2(si_int a); 81 COMPILER_RT_ABI si_int __paritydi2(di_int a); 82 83 COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b); 84 COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b); 85 COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d); 86 87 COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int* rem); 88 COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int* rem); 89 #ifdef CRT_HAS_128BIT 90 COMPILER_RT_ABI si_int __clzti2(ti_int a); 91 COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem); 92 #endif 93 94 /* Definitions for builtins unavailable on MSVC */ 95 #if defined(_MSC_VER) && !defined(__clang__) 96 #include <intrin.h> 97 98 uint32_t __inline __builtin_ctz(uint32_t value) { 99 uint32_t trailing_zero = 0; 100 if (_BitScanForward(&trailing_zero, value)) 101 return trailing_zero; 102 return 32; 103 } 104 105 uint32_t __inline __builtin_clz(uint32_t value) { 106 uint32_t leading_zero = 0; 107 if (_BitScanReverse(&leading_zero, value)) 108 return 31 - leading_zero; 109 return 32; 110 } 111 112 #if defined(_M_ARM) || defined(_M_X64) 113 uint32_t __inline __builtin_clzll(uint64_t value) { 114 uint32_t leading_zero = 0; 115 if (_BitScanReverse64(&leading_zero, value)) 116 return 63 - leading_zero; 117 return 64; 118 } 119 #else 120 uint32_t __inline __builtin_clzll(uint64_t value) { 121 if (value == 0) 122 return 64; 123 uint32_t msh = (uint32_t)(value >> 32); 124 uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF); 125 if (msh != 0) 126 return __builtin_clz(msh); 127 return 32 + __builtin_clz(lsh); 128 } 129 #endif 130 131 #define __builtin_clzl __builtin_clzll 132 #endif /* defined(_MSC_VER) && !defined(__clang__) */ 133 134 #endif /* INT_LIB_H */ 135