int_lib.h revision 256281
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/* ABI macro definitions */ 24 25#if __ARM_EABI__ 26# define ARM_EABI_FNALIAS(aeabi_name, name) \ 27 void __aeabi_##aeabi_name() __attribute__((alias("__" #name))); 28 29# if !defined(__clang__) && defined(__GNUC__) && \ 30 (__GNUC__ < 4 || __GNUC__ == 4 && __GNUC_MINOR__ < 5) 31/* The pcs attribute was introduced in GCC 4.5.0 */ 32# define COMPILER_RT_ABI 33# else 34# define COMPILER_RT_ABI __attribute__((pcs("aapcs"))) 35# endif 36 37#else 38# define ARM_EABI_FNALIAS(aeabi_name, name) 39# define COMPILER_RT_ABI 40#endif 41 42/* Include the standard compiler builtin headers we use functionality from. */ 43#include <limits.h> 44#include <stdint.h> 45#include <stdbool.h> 46#include <float.h> 47 48/* Include the commonly used internal type definitions. */ 49#include "int_types.h" 50 51/* Include internal utility function declarations. */ 52#include "int_util.h" 53 54/* 55 * Workaround for LLVM bug 11663. Prevent endless recursion in 56 * __c?zdi2(), where calls to __builtin_c?z() are expanded to 57 * __c?zdi2() instead of __c?zsi2(). 58 * 59 * Instead of placing this workaround in c?zdi2.c, put it in this 60 * global header to prevent other C files from making the detour 61 * through __c?zdi2() as well. 62 * 63 * This problem has only been observed on FreeBSD for sparc64 and 64 * mips64 with GCC 4.2.1. 65 */ 66#if defined(__FreeBSD__) && (defined(__sparc64__) || \ 67 defined(__mips_n64) || defined(__mips_o64)) 68si_int __clzsi2(si_int); 69si_int __ctzsi2(si_int); 70#define __builtin_clz __clzsi2 71#define __builtin_ctz __ctzsi2 72#endif 73 74#endif /* INT_LIB_H */ 75