609e2e6a6e
The ldrexd and strexd instructions are undefined for the ARMv7M architecture, so we cannot use them to implement the __sync_fetch_and_*_8 builtins. There is no other way to implement these without OS support, so this patch #ifdef's these functions out for M-class architectures. There are no tests as I cannot find any existing tests for these builtins. I used the __ARM_ARCH_PROFILE predefine because __ARM_FEATURE_LDREX is deprecated and not set by clang. llvm-svn: 218601
25 lines
734 B
ArmAsm
25 lines
734 B
ArmAsm
/*===-- sync_fetch_and_nand_8.S - ------------------------------------------===//
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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*
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*===----------------------------------------------------------------------===//
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*
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* This file implements the __sync_fetch_and_nand_8 function for the ARM
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* architecture.
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*
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*===----------------------------------------------------------------------===*/
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#include "sync-ops.h"
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#if __ARM_ARCH_PROFILE != 'M'
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#define nand_8(rD_LO, rD_HI, rN_LO, rN_HI, rM_LO, rM_HI) \
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bic rD_LO, rN_LO, rM_LO ; \
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bic rD_HI, rN_HI, rM_HI
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SYNC_OP_8(nand_8)
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#endif
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