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