dp-arm | 75b6057 | 2017-05-04 12:12:06 +0100 | [diff] [blame^] | 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 | # 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 ARM_EABI_FNALIAS(aeabi_name, name) |
| 42 | # define COMPILER_RT_ABI |
| 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 | unsigned long 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 | unsigned long 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 | unsigned long 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 */ |