1 /* ===-- int_lib.h - configuration header for compiler-rt -----------------===
3 * The LLVM Compiler Infrastructure
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
8 * ===----------------------------------------------------------------------===
10 * This file is a configuration header for compiler-rt.
11 * This file is not part of the interface of this library.
13 * ===----------------------------------------------------------------------===
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). */
23 /* ABI macro definitions */
26 # define ARM_EABI_FNALIAS(aeabi_name, name) \
27 void __aeabi_##aeabi_name() __attribute__((alias("__" #name)));
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
34 # define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
38 # define ARM_EABI_FNALIAS(aeabi_name, name)
39 # define COMPILER_RT_ABI
42 /* Include the standard compiler builtin headers we use functionality from. */
48 /* Include the commonly used internal type definitions. */
49 #include "int_types.h"
51 /* Include internal utility function declarations. */
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().
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.
63 * This problem has only been observed on FreeBSD for sparc64 and
64 * mips64 with GCC 4.2.1.
66 #if defined(__FreeBSD__) && (defined(__sparc64__) || \
67 defined(__mips_n64) || defined(__mips_o64))
68 si_int __clzsi2(si_int);
69 si_int __ctzsi2(si_int);
70 #define __builtin_clz __clzsi2
71 #define __builtin_ctz __ctzsi2
74 #endif /* INT_LIB_H */