forked from OSchip/llvm-project
builtins: Implement the functions from stdatomic.h
Talking to John and Doug, we concluded that these functions from stdatomic really do belong here in compiler-rt rather than in libc, since the compiler owns stdatomic.h and these need to refer to clang-specific builtins. Nonetheless, I've only added these on darwin for now - other platforms should probably do the same unless their libc does implement these functions. llvm-svn: 236805
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/*===-- atomic_flag_clear.c -------------------------------------------------===
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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 atomic_flag_clear from C11's stdatomic.h.
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_flag_clear
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void atomic_flag_clear(volatile atomic_flag *object) {
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return __c11_atomic_store(&(object)->_Value, 0, __ATOMIC_SEQ_CST);
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}
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/*===-- atomic_flag_clear_explicit.c ----------------------------------------===
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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 atomic_flag_clear_explicit from C11's stdatomic.h.
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_flag_clear_explicit
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void atomic_flag_clear_explicit(volatile atomic_flag *object,
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memory_order order) {
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return __c11_atomic_store(&(object)->_Value, 0, order);
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}
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/*===-- atomic_flag_test_and_set.c ------------------------------------------===
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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 atomic_flag_test_and_set from C11's stdatomic.h.
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_flag_test_and_set
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_Bool atomic_flag_test_and_set(volatile atomic_flag *object) {
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return __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST);
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}
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/*===-- atomic_flag_test_and_set_explicit.c ---------------------------------===
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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 atomic_flag_test_and_set_explicit from C11's stdatomic.h
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_flag_test_and_set_explicit
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_Bool atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
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memory_order order) {
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return __c11_atomic_exchange(&(object)->_Value, 1, order);
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}
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/*===-- atomic_signal_fence.c -----------------------------------------------===
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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 atomic_signal_fence from C11's stdatomic.h.
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_signal_fence
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void atomic_signal_fence(memory_order order) {
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__c11_atomic_signal_fence(order);
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}
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/*===-- atomic_thread_fence.c -----------------------------------------------===
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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 atomic_thread_fence from C11's stdatomic.h.
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*
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*===------------------------------------------------------------------------===
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*/
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#include <stdatomic.h>
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#undef atomic_thread_fence
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void atomic_thread_fence(memory_order order) {
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__c11_atomic_thread_fence(order);
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}
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@ -255,17 +255,26 @@ CFLAGS.ubsan_osx_dynamic += -isysroot $(OSX_SDK)
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LDFLAGS.ubsan_osx_dynamic += -isysroot $(OSX_SDK)
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endif
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ATOMIC_FUNCTIONS := \
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atomic_flag_clear \
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atomic_flag_clear_explicit \
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atomic_flag_test_and_set \
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atomic_flag_test_and_set_explicit \
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atomic_signal_fence \
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atomic_thread_fence
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FUNCTIONS.eprintf := eprintf
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FUNCTIONS.10.4 := eprintf floatundidf floatundisf floatundixf
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FUNCTIONS.ios := divmodsi4 udivmodsi4 mulosi4 mulodi4 muloti4
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FUNCTIONS.ios := divmodsi4 udivmodsi4 mulosi4 mulodi4 muloti4 \
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$(ATOMIC_FUNCTIONS)
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# On x86, the divmod functions reference divsi.
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FUNCTIONS.ios.i386 := $(FUNCTIONS.ios) \
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divsi3 udivsi3
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FUNCTIONS.ios.x86_64 := $(FUNCTIONS.ios.i386)
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FUNCTIONS.ios.arm64 := mulsc3 muldc3 divsc3 divdc3
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FUNCTIONS.ios.arm64 := mulsc3 muldc3 divsc3 divdc3 $(ATOMIC_FUNCTIONS)
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FUNCTIONS.osx := mulosi4 mulodi4 muloti4
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FUNCTIONS.osx := mulosi4 mulodi4 muloti4 $(ATOMIC_FUNCTIONS)
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FUNCTIONS.profile_osx := GCDAProfiling InstrProfiling InstrProfilingBuffer \
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InstrProfilingFile InstrProfilingPlatformDarwin \
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@ -176,7 +176,13 @@ COMMON_FUNCTIONS := \
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udivsi3 \
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umodsi3 \
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unorddf2 \
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unordsf2
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unordsf2 \
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atomic_flag_clear \
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atomic_flag_clear_explicit \
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atomic_flag_test_and_set \
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atomic_flag_test_and_set_explicit \
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atomic_signal_fence \
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atomic_thread_fence
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ARM_FUNCTIONS := \
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aeabi_cdcmpeq \
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@ -47,7 +47,10 @@ FUNCTIONS := absvdi2 absvsi2 addvdi3 addvsi3 ashldi3 ashrdi3 \
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mulodi4 muloti4 mulsc3 mulvdi3 mulvsi3 negdi2 negvdi2 negvsi2 \
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paritydi2 paritysi2 popcountdi2 popcountsi2 powidf2 \
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powisf2 subvdi3 subvsi3 ucmpdi2 udivdi3 \
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udivmoddi4 umoddi3 apple_versioning eprintf atomic
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udivmoddi4 umoddi3 apple_versioning eprintf atomic \
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atomic_flag_clear atomic_flag_clear_explicit \
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atomic_flag_test_and_set atomic_flag_test_and_set_explicit \
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atomic_signal_fence atomic_thread_fence
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FUNCTIONS.i386 := $(FUNCTIONS) \
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divxc3 fixunsxfdi fixunsxfsi fixxfdi floatdixf \
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fixdfti fixsfti \
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fixunsdfti fixunssfti fixunssfti \
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floattidf floattisf floatuntidf floatuntisf \
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gcc_personality_v0 atomic
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gcc_personality_v0 atomic \
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atomic_flag_clear atomic_flag_clear_explicit \
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atomic_flag_test_and_set \
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atomic_flag_test_and_set_explicit \
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atomic_signal_fence atomic_thread_fence
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