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

     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 .text

     9 // PRInt32 _PR_ia64_AtomicIncrement(PRInt32 *val)

    10 //

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

    12 // the result of the increment.

    13 //

    14         .align 16

    15         .global _PR_ia64_AtomicIncrement#

    16         .proc _PR_ia64_AtomicIncrement#

    17 _PR_ia64_AtomicIncrement:

    18         fetchadd4.acq r8 = [r32], 1  ;;

    19         adds r8 = 1, r8

    20         br.ret.sptk.many b0

    21         .endp _PR_ia64_AtomicIncrement#

    23 // PRInt32 _PR_ia64_AtomicDecrement(PRInt32 *val)

    24 //

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

    26 // the result of the decrement.

    27 //

    28         .align 16

    29         .global _PR_ia64_AtomicDecrement#

    30         .proc _PR_ia64_AtomicDecrement#

    31 _PR_ia64_AtomicDecrement:

    32         fetchadd4.rel r8 = [r32], -1  ;;

    33         adds r8 = -1, r8

    34         br.ret.sptk.many b0

    35         .endp _PR_ia64_AtomicDecrement#

    37 // PRInt32 _PR_ia64_AtomicAdd(PRInt32 *ptr, PRInt32 val)

    38 //

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

    40 // and return the result of the addition.

    41 //

    42         .align 16

    43         .global _PR_ia64_AtomicAdd#

    44         .proc _PR_ia64_AtomicAdd#

    45 _PR_ia64_AtomicAdd:

    46         ld4 r15 = [r32]  ;;

    47 .L3:

    48         mov r14 = r15

    49         mov ar.ccv = r15

    50         add r8 = r15, r33  ;;

    51         cmpxchg4.acq r15 = [r32], r8, ar.ccv  ;;

    52         cmp4.ne p6, p7 =  r15, r14

    53         (p6) br.cond.dptk .L3

    54         br.ret.sptk.many b0

    55         .endp _PR_ia64_AtomicAdd#

    57 // PRInt32 _PR_ia64_AtomicSet(PRInt32 *val, PRInt32 newval)

    58 //

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

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

    61 //

    62         .align 16

    63         .global _PR_ia64_AtomicSet#

    64         .proc _PR_ia64_AtomicSet#

    65 _PR_ia64_AtomicSet:

    66         xchg4 r8 = [r32], r33

    67         br.ret.sptk.many b0

    68         .endp _PR_ia64_AtomicSet#

    70 // Magic indicating no need for an executable stack

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

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