5b813f1a2a
Prior to this change we would assume the ABI for Apple targets to be GNU which could result in subtle errors in LLVM emitting calls to non-existent system libc provided functions such as `_sincosf` which is a GNU extension and as such is not provided by macOS for example. This would result in linker errors where the linker would not be able to find the said symbol in `libSystem.tbd`. With this change, we now correctly identify macOS (and other Apple platforms) as having ABI `unknown` which translates to unspecified in LLVM under-the-hood: ``` // main.ll target triple = "aarch64-unknown-macos-unknown" ``` Note however that we never suffix the target OS with target version such as `macos11` or `macos12` which means we fail to instruct LLVM of potential optimisations provided by the OS such as the availability of function `___sincosf_stret`. I suggest we investigate that in a follow-up commit.
104 lines
2.6 KiB
C
Vendored
104 lines
2.6 KiB
C
Vendored
/*
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* Copyright (c) 2006-2012 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _OS__OSBYTEORDERI386_H
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#define _OS__OSBYTEORDERI386_H
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#if !defined(__DARWIN_OS_INLINE)
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# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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# define __DARWIN_OS_INLINE static inline
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# elif defined(__MWERKS__) || defined(__cplusplus)
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# define __DARWIN_OS_INLINE static inline
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# else
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# define __DARWIN_OS_INLINE static __inline__
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# endif
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#endif
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/* Generic byte swapping functions. */
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__DARWIN_OS_INLINE
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__uint16_t
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_OSSwapInt16(
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__uint16_t _data
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)
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{
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return (__uint16_t)((_data << 8) | (_data >> 8));
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}
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__DARWIN_OS_INLINE
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__uint32_t
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_OSSwapInt32(
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__uint32_t _data
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)
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{
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#if defined(__llvm__)
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return __builtin_bswap32(_data);
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#else
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__asm__ ("bswap %0" : "+r" (_data));
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return _data;
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#endif
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}
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#if defined(__llvm__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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return __builtin_bswap64(_data);
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}
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#elif defined(__i386__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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__asm__ ("bswap %%eax\n\t"
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"bswap %%edx\n\t"
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"xchgl %%eax, %%edx"
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: "+A" (_data));
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return _data;
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}
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#elif defined(__x86_64__)
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__DARWIN_OS_INLINE
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__uint64_t
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_OSSwapInt64(
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__uint64_t _data
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)
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{
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__asm__ ("bswap %0" : "+r" (_data));
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return _data;
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}
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#else
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#error Unknown architecture
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#endif
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#endif /* ! _OS__OSBYTEORDERI386_H */ |