The Tor Browser: nsprpub/pr/src/md/unix/os_Linux_x86

     1 // -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2 //

     3 // This Source Code Form is subject to the terms of the Mozilla Public

     4 // License, v. 2.0. If a copy of the MPL was not distributed with this

     5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.

     7 // PRInt32 _PR_x86_64_AtomicIncrement(PRInt32 *val)

     8 //

     9 // Atomically increment the integer pointed to by 'val' and return

    10 // the result of the increment.

    11 //

    12     .text

    13     .globl _PR_x86_64_AtomicIncrement

    14     .type _PR_x86_64_AtomicIncrement, @function

    15     .align 4

    16 _PR_x86_64_AtomicIncrement:

    17     movl $1, %eax

    18     lock

    19     xaddl %eax, (%rdi)

    20     incl %eax

    21     ret

    22     .size _PR_x86_64_AtomicIncrement, .-_PR_x86_64_AtomicIncrement

    24 // PRInt32 _PR_x86_64_AtomicDecrement(PRInt32 *val)

    25 //

    26 // Atomically decrement the integer pointed to by 'val' and return

    27 // the result of the decrement.

    28 //

    29     .text

    30     .globl _PR_x86_64_AtomicDecrement

    31     .type _PR_x86_64_AtomicDecrement, @function

    32     .align 4

    33 _PR_x86_64_AtomicDecrement:

    34     movl $-1, %eax

    35     lock

    36     xaddl %eax, (%rdi)

    37     decl %eax

    38     ret

    39     .size _PR_x86_64_AtomicDecrement, .-_PR_x86_64_AtomicDecrement

    41 // PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval)

    42 //

    43 // Atomically set the integer pointed to by 'val' to the new

    44 // value 'newval' and return the old value.

    45 //

    46     .text

    47     .globl _PR_x86_64_AtomicSet

    48     .type _PR_x86_64_AtomicSet, @function

    49     .align 4

    50 _PR_x86_64_AtomicSet:

    51     movl %esi, %eax

    52     xchgl %eax, (%rdi)

    53     ret

    54     .size _PR_x86_64_AtomicSet, .-_PR_x86_64_AtomicSet

    56 // PRInt32 _PR_x86_64_AtomicAdd(PRInt32 *ptr, PRInt32 val)

    57 //

    58 // Atomically add 'val' to the integer pointed to by 'ptr'

    59 // and return the result of the addition.

    60 //

    61     .text

    62     .globl _PR_x86_64_AtomicAdd

    63     .type _PR_x86_64_AtomicAdd, @function

    64     .align 4

    65 _PR_x86_64_AtomicAdd:

    66     movl %esi, %eax

    67     lock

    68     xaddl %eax, (%rdi)

    69     addl %esi, %eax

    70     ret

    71     .size _PR_x86_64_AtomicAdd, .-_PR_x86_64_AtomicAdd

    73 // Magic indicating no need for an executable stack

    74 .section .note.GNU-stack, "", @progbits ; .previous

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