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Add cpuRelax assembler for other platforms
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def
@@ -21,19 +21,19 @@ when someGcc and hasThreadSupport:
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## synchronization with another thread.
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var ATOMIC_ACQUIRE* {.importc: "__ATOMIC_ACQUIRE", nodecl.}: AtomMemModel
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## Barrier to hoisting of code and synchronizes with
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## release (or stronger)
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## release (or stronger)
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## semantic stores from another thread.
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var ATOMIC_RELEASE* {.importc: "__ATOMIC_RELEASE", nodecl.}: AtomMemModel
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## Barrier to sinking of code and synchronizes with
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## acquire (or stronger)
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## semantic loads from another thread.
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## acquire (or stronger)
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## semantic loads from another thread.
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var ATOMIC_ACQ_REL* {.importc: "__ATOMIC_ACQ_REL", nodecl.}: AtomMemModel
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## Full barrier in both directions and synchronizes
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## with acquire loads
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## with acquire loads
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## and release stores in another thread.
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var ATOMIC_SEQ_CST* {.importc: "__ATOMIC_SEQ_CST", nodecl.}: AtomMemModel
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## Full barrier in both directions and synchronizes
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## with acquire loads
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## with acquire loads
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## and release stores in all threads.
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type
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@@ -46,11 +46,11 @@ when someGcc and hasThreadSupport:
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## ATOMIC_RELAXED, ATOMIC_SEQ_CST, ATOMIC_ACQUIRE, ATOMIC_CONSUME.
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proc atomicLoad*[T: TAtomType](p, ret: ptr T, mem: AtomMemModel) {.
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importc: "__atomic_load", nodecl.}
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importc: "__atomic_load", nodecl.}
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## This is the generic version of an atomic load. It returns the contents at p in ret.
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proc atomicStoreN*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel) {.
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importc: "__atomic_store_n", nodecl.}
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importc: "__atomic_store_n", nodecl.}
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## This proc implements an atomic store operation. It writes val at p.
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## ATOMIC_RELAXED, ATOMIC_SEQ_CST, and ATOMIC_RELEASE.
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@@ -60,39 +60,39 @@ when someGcc and hasThreadSupport:
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proc atomicExchangeN*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_exchange_n", nodecl.}
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## This proc implements an atomic exchange operation. It writes val at p,
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## This proc implements an atomic exchange operation. It writes val at p,
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## and returns the previous contents at p.
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## ATOMIC_RELAXED, ATOMIC_SEQ_CST, ATOMIC_ACQUIRE, ATOMIC_RELEASE, ATOMIC_ACQ_REL
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proc atomicExchange*[T: TAtomType](p, val, ret: ptr T, mem: AtomMemModel) {.
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importc: "__atomic_exchange", nodecl.}
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## This is the generic version of an atomic exchange. It stores the contents at val at p.
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## This is the generic version of an atomic exchange. It stores the contents at val at p.
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## The original value at p is copied into ret.
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proc atomicCompareExchangeN*[T: TAtomType](p, expected: ptr T, desired: T,
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weak: bool, success_memmodel: AtomMemModel, failure_memmodel: AtomMemModel): bool {.
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importc: "__atomic_compare_exchange_n ", nodecl.}
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importc: "__atomic_compare_exchange_n ", nodecl.}
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## This proc implements an atomic compare and exchange operation. This compares the
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## contents at p with the contents at expected and if equal, writes desired at p.
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## If they are not equal, the current contents at p is written into expected.
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## Weak is true for weak compare_exchange, and false for the strong variation.
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## Many targets only offer the strong variation and ignore the parameter.
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## contents at p with the contents at expected and if equal, writes desired at p.
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## If they are not equal, the current contents at p is written into expected.
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## Weak is true for weak compare_exchange, and false for the strong variation.
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## Many targets only offer the strong variation and ignore the parameter.
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## When in doubt, use the strong variation.
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## True is returned if desired is written at p and the execution is considered
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## to conform to the memory model specified by success_memmodel. There are no
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## restrictions on what memory model can be used here. False is returned otherwise,
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## and the execution is considered to conform to failure_memmodel. This memory model
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## cannot be __ATOMIC_RELEASE nor __ATOMIC_ACQ_REL. It also cannot be a stronger model
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## True is returned if desired is written at p and the execution is considered
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## to conform to the memory model specified by success_memmodel. There are no
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## restrictions on what memory model can be used here. False is returned otherwise,
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## and the execution is considered to conform to failure_memmodel. This memory model
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## cannot be __ATOMIC_RELEASE nor __ATOMIC_ACQ_REL. It also cannot be a stronger model
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## than that specified by success_memmodel.
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proc atomicCompareExchange*[T: TAtomType](p, expected, desired: ptr T,
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weak: bool, success_memmodel: AtomMemModel, failure_memmodel: AtomMemModel): bool {.
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importc: "__atomic_compare_exchange_n ", nodecl.}
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## This proc implements the generic version of atomic_compare_exchange.
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## The proc is virtually identical to atomic_compare_exchange_n, except the desired
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## value is also a pointer.
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importc: "__atomic_compare_exchange_n ", nodecl.}
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## This proc implements the generic version of atomic_compare_exchange.
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## The proc is virtually identical to atomic_compare_exchange_n, except the desired
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## value is also a pointer.
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## Perform the operation return the new value, all memory models are valid
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## Perform the operation return the new value, all memory models are valid
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proc atomicAddFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_add_fetch", nodecl.}
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proc atomicSubFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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@@ -101,64 +101,64 @@ when someGcc and hasThreadSupport:
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importc: "__atomic_or_fetch ", nodecl.}
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proc atomicAndFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_and_fetch", nodecl.}
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proc atomicXorFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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proc atomicXorFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_xor_fetch", nodecl.}
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proc atomicNandFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_nand_fetch ", nodecl.}
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proc atomicNandFetch*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_nand_fetch ", nodecl.}
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## Perform the operation return the old value, all memory models are valid
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## Perform the operation return the old value, all memory models are valid
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proc atomicFetchAdd*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_add", nodecl.}
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proc atomicFetchSub*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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proc atomicFetchSub*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_sub", nodecl.}
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proc atomicFetchOr*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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proc atomicFetchOr*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_or", nodecl.}
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proc atomicFetchAnd*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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proc atomicFetchAnd*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_and", nodecl.}
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proc atomicFetchXor*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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proc atomicFetchXor*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_xor", nodecl.}
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proc atomicFetchNand*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_nand", nodecl.}
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proc atomicFetchNand*[T: TAtomType](p: ptr T, val: T, mem: AtomMemModel): T {.
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importc: "__atomic_fetch_nand", nodecl.}
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proc atomicTestAndSet*(p: pointer, mem: AtomMemModel): bool {.
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importc: "__atomic_test_and_set", nodecl.}
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## This built-in function performs an atomic test-and-set operation on the byte at p.
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proc atomicTestAndSet*(p: pointer, mem: AtomMemModel): bool {.
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importc: "__atomic_test_and_set", nodecl.}
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## This built-in function performs an atomic test-and-set operation on the byte at p.
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## The byte is set to some implementation defined nonzero “set” value and the return
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## value is true if and only if the previous contents were “set”.
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## All memory models are valid.
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proc atomicClear*(p: pointer, mem: AtomMemModel) {.
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proc atomicClear*(p: pointer, mem: AtomMemModel) {.
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importc: "__atomic_clear", nodecl.}
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## This built-in function performs an atomic clear operation at p.
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## This built-in function performs an atomic clear operation at p.
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## After the operation, at p contains 0.
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## ATOMIC_RELAXED, ATOMIC_SEQ_CST, ATOMIC_RELEASE
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proc atomicThreadFence*(mem: AtomMemModel) {.
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proc atomicThreadFence*(mem: AtomMemModel) {.
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importc: "__atomic_thread_fence", nodecl.}
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## This built-in function acts as a synchronization fence between threads based
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## This built-in function acts as a synchronization fence between threads based
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## on the specified memory model. All memory orders are valid.
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proc atomicSignalFence*(mem: AtomMemModel) {.
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proc atomicSignalFence*(mem: AtomMemModel) {.
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importc: "__atomic_signal_fence", nodecl.}
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## This built-in function acts as a synchronization fence between a thread and
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## This built-in function acts as a synchronization fence between a thread and
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## signal handlers based in the same thread. All memory orders are valid.
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proc atomicAlwaysLockFree*(size: int, p: pointer): bool {.
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proc atomicAlwaysLockFree*(size: int, p: pointer): bool {.
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importc: "__atomic_always_lock_free", nodecl.}
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## This built-in function returns true if objects of size bytes always generate
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## lock free atomic instructions for the target architecture. size must resolve
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## This built-in function returns true if objects of size bytes always generate
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## lock free atomic instructions for the target architecture. size must resolve
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## to a compile-time constant and the result also resolves to a compile-time constant.
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## ptr is an optional pointer to the object that may be used to determine alignment.
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## A value of 0 indicates typical alignment should be used. The compiler may also
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## ptr is an optional pointer to the object that may be used to determine alignment.
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## A value of 0 indicates typical alignment should be used. The compiler may also
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## ignore this parameter.
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proc atomicIsLockFree*(size: int, p: pointer): bool {.
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proc atomicIsLockFree*(size: int, p: pointer): bool {.
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importc: "__atomic_is_lock_free", nodecl.}
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## This built-in function returns true if objects of size bytes always generate
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## lock free atomic instructions for the target architecture. If it is not known
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## This built-in function returns true if objects of size bytes always generate
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## lock free atomic instructions for the target architecture. If it is not known
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## to be lock free a call is made to a runtime routine named __atomic_is_lock_free.
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## ptr is an optional pointer to the object that may be used to determine alignment.
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## A value of 0 indicates typical alignment should be used. The compiler may also
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## ptr is an optional pointer to the object that may be used to determine alignment.
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## A value of 0 indicates typical alignment should be used. The compiler may also
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## ignore this parameter.
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template fence*() = atomicThreadFence(ATOMIC_SEQ_CST)
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@@ -178,7 +178,7 @@ proc atomicInc*(memLoc: var int, x: int = 1): int =
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else:
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inc(memLoc, x)
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result = memLoc
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proc atomicDec*(memLoc: var int, x: int = 1): int =
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when someGcc and hasThreadSupport:
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when declared(atomic_sub_fetch):
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@@ -206,6 +206,9 @@ else:
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when (defined(x86) or defined(amd64)) and someGcc:
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proc cpuRelax* {.inline.} =
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{.emit: """asm volatile("pause" ::: "memory");""".}
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elif someGcc:
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proc cpuRelax* {.inline.} =
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{.emit: """asm volatile("" ::: "memory");""".}
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elif (defined(x86) or defined(amd64)) and defined(vcc):
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proc cpuRelax* {.importc: "YieldProcessor", header: "<windows.h>".}
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elif defined(icl):
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