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/ Version: MPL 1.1/GPL 2.0/LGPL 2.1
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/ The Original Code is the Netscape Portable Runtime (NSPR).
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/ PRInt32 _MD_AtomicIncrement(PRInt32 *val)
/
/ Atomically increment the integer pointed to by 'val' and return
/ the result of the increment.
/
    .text
    .globl _MD_AtomicIncrement
    .align 4
_MD_AtomicIncrement:
    movl $1, %eax
    lock
    xaddl %eax, (%rdi)
    incl %eax
    ret

/ PRInt32 _MD_AtomicDecrement(PRInt32 *val)
/
/ Atomically decrement the integer pointed to by 'val' and return
/ the result of the decrement.
/
    .text
    .globl _MD_AtomicDecrement
    .align 4
_MD_AtomicDecrement:
    movl $-1, %eax
    lock
    xaddl %eax, (%rdi)
    decl %eax
    ret

/ PRInt32 _MD_AtomicSet(PRInt32 *val, PRInt32 newval)
/
/ Atomically set the integer pointed to by 'val' to the new
/ value 'newval' and return the old value.
/
    .text
    .globl _MD_AtomicSet
    .align 4
_MD_AtomicSet:
    movl %esi, %eax
    xchgl %eax, (%rdi)
    ret

/ PRInt32 _MD_AtomicAdd(PRInt32 *ptr, PRInt32 val)
/
/ Atomically add 'val' to the integer pointed to by 'ptr'
/ and return the result of the addition.
/
    .text
    .globl _MD_AtomicAdd
    .align 4
_MD_AtomicAdd:
    movl %esi, %eax
    lock
    xaddl %eax, (%rdi)
    addl %esi, %eax
    ret