;; Licensed to the .NET Foundation under one or more agreements.
;; The .NET Foundation licenses this file to you under the MIT license.
;; See the LICENSE file in the project root for more information.

include AsmMacros.inc

;; WARNING: Code in EHHelpers.cpp makes assumptions about this helper, in particular:
;; - Function "InWriteBarrierHelper" assumes an AV due to passed in null pointer will happen at RhpLockCmpXchg32AVLocation
;; - Function "UnwindWriteBarrierToCaller" assumes the stack contains just the pushed return address
LEAF_ENTRY RhpLockCmpXchg32, _TEXT
    mov             rax, r8
ALTERNATE_ENTRY RhpLockCmpXchg32AVLocation
    lock cmpxchg    [rcx], edx
    ret
LEAF_END RhpLockCmpXchg32, _TEXT

;; WARNING: Code in EHHelpers.cpp makes assumptions about this helper, in particular:
;; - Function "InWriteBarrierHelper" assumes an AV due to passed in null pointer will happen at RhpLockCmpXchg64AVLocation
;; - Function "UnwindWriteBarrierToCaller" assumes the stack contains just the pushed return address
LEAF_ENTRY RhpLockCmpXchg64, _TEXT
    mov             rax, r8
ALTERNATE_ENTRY RhpLockCmpXchg64AVLocation
    lock cmpxchg    [rcx], rdx
    ret
LEAF_END RhpLockCmpXchg64, _TEXT

    end