diff options
Diffstat (limited to 'cpukit/compiler-rt/lib/builtins/int_lib.h')
| -rw-r--r-- | cpukit/compiler-rt/lib/builtins/int_lib.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/cpukit/compiler-rt/lib/builtins/int_lib.h b/cpukit/compiler-rt/lib/builtins/int_lib.h new file mode 100644 index 0000000000..04ea2d9105 --- /dev/null +++ b/cpukit/compiler-rt/lib/builtins/int_lib.h @@ -0,0 +1,171 @@ +//===-- 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> + +int __inline __builtin_ctz(uint32_t value) { + unsigned long trailing_zero = 0; + if (_BitScanForward(&trailing_zero, value)) + return trailing_zero; + return 32; +} + +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) +int __inline __builtin_clzll(uint64_t value) { + unsigned long leading_zero = 0; + if (_BitScanReverse64(&leading_zero, value)) + return 63 - leading_zero; + return 64; +} +#else +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 + +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 |