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 | |