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annotate nspr/pr/src/md/unix/os_Linux_x86.s @ 3:150b72113545

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Add DBM and legacydb support
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:32:02 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 // -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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2 //
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3 // This Source Code Form is subject to the terms of the Mozilla Public
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4 // License, v. 2.0. If a copy of the MPL was not distributed with this
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5 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
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6
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7 // PRInt32 _PR_x86_AtomicIncrement(PRInt32 *val)
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8 //
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9 // Atomically increment the integer pointed to by 'val' and return
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10 // the result of the increment.
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11 //
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12 .text
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13 .globl _PR_x86_AtomicIncrement
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14 .align 4
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15 _PR_x86_AtomicIncrement:
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16 movl 4(%esp), %ecx
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17 movl $1, %eax
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18 lock
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19 xaddl %eax, (%ecx)
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20 incl %eax
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21 ret
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22
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23 // PRInt32 _PR_x86_AtomicDecrement(PRInt32 *val)
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24 //
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25 // Atomically decrement the integer pointed to by 'val' and return
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26 // the result of the decrement.
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27 //
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28 .text
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29 .globl _PR_x86_AtomicDecrement
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30 .align 4
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31 _PR_x86_AtomicDecrement:
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32 movl 4(%esp), %ecx
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33 movl $-1, %eax
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34 lock
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35 xaddl %eax, (%ecx)
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36 decl %eax
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37 ret
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38
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39 // PRInt32 _PR_x86_AtomicSet(PRInt32 *val, PRInt32 newval)
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40 //
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41 // Atomically set the integer pointed to by 'val' to the new
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42 // value 'newval' and return the old value.
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43 //
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44 // An alternative implementation:
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45 // .text
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46 // .globl _PR_x86_AtomicSet
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47 // .align 4
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48 //_PR_x86_AtomicSet:
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49 // movl 4(%esp), %ecx
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50 // movl 8(%esp), %edx
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51 // movl (%ecx), %eax
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52 //retry:
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53 // lock
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54 // cmpxchgl %edx, (%ecx)
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55 // jne retry
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56 // ret
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57 //
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58 .text
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59 .globl _PR_x86_AtomicSet
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60 .align 4
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61 _PR_x86_AtomicSet:
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62 movl 4(%esp), %ecx
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63 movl 8(%esp), %eax
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64 xchgl %eax, (%ecx)
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65 ret
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66
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67 // PRInt32 _PR_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val)
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68 //
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69 // Atomically add 'val' to the integer pointed to by 'ptr'
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70 // and return the result of the addition.
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71 //
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72 .text
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73 .globl _PR_x86_AtomicAdd
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74 .align 4
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75 _PR_x86_AtomicAdd:
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76 movl 4(%esp), %ecx
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77 movl 8(%esp), %eax
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78 movl %eax, %edx
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79 lock
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80 xaddl %eax, (%ecx)
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81 addl %edx, %eax
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82 ret
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83
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84 // Magic indicating no need for an executable stack
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85 .section .note.GNU-stack, "", @progbits ; .previous
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