| //===-- int_lib.h - configuration header for compiler-rt -----------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a configuration header for compiler-rt. |
| // This file is not part of the interface of this library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef INT_LIB_H |
| #define INT_LIB_H |
| |
| // Assumption: Signed integral is 2's complement. |
| // Assumption: Right shift of signed negative is arithmetic shift. |
| // Assumption: Endianness is little or big (not mixed). |
| |
| // ABI macro definitions |
| |
| #if __ARM_EABI__ |
| #ifdef COMPILER_RT_ARMHF_TARGET |
| #define COMPILER_RT_ABI |
| #else |
| #define COMPILER_RT_ABI __attribute__((__pcs__("aapcs"))) |
| #endif |
| #else |
| #define COMPILER_RT_ABI |
| #endif |
| |
| #define AEABI_RTABI __attribute__((__pcs__("aapcs"))) |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define ALWAYS_INLINE __forceinline |
| #define NOINLINE __declspec(noinline) |
| #define NORETURN __declspec(noreturn) |
| #define UNUSED |
| #else |
| #define ALWAYS_INLINE __attribute__((always_inline)) |
| #define NOINLINE __attribute__((noinline)) |
| #define NORETURN __attribute__((noreturn)) |
| #define UNUSED __attribute__((unused)) |
| #endif |
| |
| #define STR(a) #a |
| #define XSTR(a) STR(a) |
| #define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name |
| |
| #if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) || \ |
| defined(_AIX) || defined(__CYGWIN__) |
| #define COMPILER_RT_ALIAS(name, aliasname) \ |
| COMPILER_RT_ABI __typeof(name) aliasname __attribute__((__alias__(#name))); |
| #elif defined(__APPLE__) |
| #if defined(VISIBILITY_HIDDEN) |
| #define COMPILER_RT_ALIAS_VISIBILITY(name) \ |
| __asm__(".private_extern " SYMBOL_NAME(name)); |
| #else |
| #define COMPILER_RT_ALIAS_VISIBILITY(name) |
| #endif |
| #define COMPILER_RT_ALIAS(name, aliasname) \ |
| __asm__(".globl " SYMBOL_NAME(aliasname)); \ |
| COMPILER_RT_ALIAS_VISIBILITY(aliasname) \ |
| __asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \ |
| COMPILER_RT_ABI __typeof(name) aliasname; |
| #elif defined(_WIN32) |
| #define COMPILER_RT_ALIAS(name, aliasname) |
| #else |
| #error Unsupported target |
| #endif |
| |
| #if (defined(__FreeBSD__) || defined(__NetBSD__)) && \ |
| (defined(_KERNEL) || defined(_STANDALONE)) |
| // |
| // Kernel and boot environment can't use normal headers, |
| // so use the equivalent system headers. |
| // NB: FreeBSD (and OpenBSD) deprecate machine/limits.h in |
| // favour of sys/limits.h, so prefer the former, but fall |
| // back on the latter if not available since NetBSD only has |
| // the latter. |
| // |
| #if defined(__has_include) && __has_include(<sys/limits.h>) |
| #include <sys/limits.h> |
| #else |
| #include <machine/limits.h> |
| #endif |
| #include <sys/stdint.h> |
| #include <sys/types.h> |
| #else |
| // Include the standard compiler builtin headers we use functionality from. |
| #include <float.h> |
| #include <limits.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #endif |
| |
| // Include the commonly used internal type definitions. |
| #include "int_types.h" |
| |
| // Include internal utility function declarations. |
| #include "int_util.h" |
| |
| COMPILER_RT_ABI int __paritysi2(si_int a); |
| COMPILER_RT_ABI int __paritydi2(di_int a); |
| |
| COMPILER_RT_ABI di_int __divdi3(di_int a, di_int b); |
| COMPILER_RT_ABI si_int __divsi3(si_int a, si_int b); |
| COMPILER_RT_ABI su_int __udivsi3(su_int n, su_int d); |
| |
| COMPILER_RT_ABI su_int __udivmodsi4(su_int a, su_int b, su_int *rem); |
| COMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int *rem); |
| #ifdef CRT_HAS_128BIT |
| COMPILER_RT_ABI int __clzti2(ti_int a); |
| COMPILER_RT_ABI tu_int __udivmodti4(tu_int a, tu_int b, tu_int *rem); |
| #endif |
| |
| // Definitions for builtins unavailable on MSVC |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #include <intrin.h> |
| |
| static int __inline __builtin_ctz(uint32_t value) { |
| unsigned long trailing_zero = 0; |
| if (_BitScanForward(&trailing_zero, value)) |
| return trailing_zero; |
| return 32; |
| } |
| |
| static int __inline __builtin_clz(uint32_t value) { |
| unsigned long leading_zero = 0; |
| if (_BitScanReverse(&leading_zero, value)) |
| return 31 - leading_zero; |
| return 32; |
| } |
| |
| #if defined(_M_ARM) || defined(_M_X64) |
| static int __inline __builtin_clzll(uint64_t value) { |
| unsigned long leading_zero = 0; |
| if (_BitScanReverse64(&leading_zero, value)) |
| return 63 - leading_zero; |
| return 64; |
| } |
| #else |
| static int __inline __builtin_clzll(uint64_t value) { |
| if (value == 0) |
| return 64; |
| uint32_t msh = (uint32_t)(value >> 32); |
| uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF); |
| if (msh != 0) |
| return __builtin_clz(msh); |
| return 32 + __builtin_clz(lsh); |
| } |
| #endif |
| |
| #define __builtin_clzl __builtin_clzll |
| |
| static bool __inline __builtin_sadd_overflow(int x, int y, int *result) { |
| if ((x < 0) != (y < 0)) { |
| *result = x + y; |
| return false; |
| } |
| int tmp = (unsigned int)x + (unsigned int)y; |
| if ((tmp < 0) != (x < 0)) |
| return true; |
| *result = tmp; |
| return false; |
| } |
| |
| #endif // defined(_MSC_VER) && !defined(__clang__) |
| |
| #endif // INT_LIB_H |