int_lib.h revision 230021 
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# define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
29#else
30# define ARM_EABI_FNALIAS(aeabi_name, name)
31# define COMPILER_RT_ABI
32#endif
33
34/* Include the standard compiler builtin headers we use functionality from. */
35#include <limits.h>
36#include <stdint.h>
37#include <stdbool.h>
38#include <float.h>
39
40/* Include the commonly used internal type definitions. */
41#include "int_types.h"
42
43/* Include internal utility function declarations. */
44#include "int_util.h"
45
46/*
47 * Workaround for LLVM bug 11663.  Prevent endless recursion in
48 * __c?zdi2(), where calls to __builtin_c?z() are expanded to
49 * __c?zdi2() instead of __c?zsi2().
50 *
51 * Instead of placing this workaround in c?zdi2.c, put it in this
52 * global header to prevent other C files from making the detour
53 * through __c?zdi2() as well.
54 *
55 * This problem has only been observed on FreeBSD for sparc64 and
56 * mips64 with GCC 4.2.1.
57 */
58#if defined(__FreeBSD__) && (defined(__sparc64__) || \
59    defined(__mips_n64) || defined(__mips_o64))
60si_int __clzsi2(si_int);
61si_int __ctzsi2(si_int);
62#define	__builtin_clz	__clzsi2
63#define	__builtin_ctz	__ctzsi2
64#endif
65
66#endif /* INT_LIB_H */
67