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| 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/. | |
| 6 | |
| 7 // PRInt32 _PR_x86_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_AtomicIncrement | |
| 14 .align 4 | |
| 15 _PR_x86_AtomicIncrement: | |
| 16 movl 4(%esp), %ecx | |
| 17 movl $1, %eax | |
| 18 lock | |
| 19 xaddl %eax, (%ecx) | |
| 20 incl %eax | |
| 21 ret | |
| 22 | |
| 23 // PRInt32 _PR_x86_AtomicDecrement(PRInt32 *val) | |
| 24 // | |
| 25 // Atomically decrement the integer pointed to by 'val' and return | |
| 26 // the result of the decrement. | |
| 27 // | |
| 28 .text | |
| 29 .globl _PR_x86_AtomicDecrement | |
| 30 .align 4 | |
| 31 _PR_x86_AtomicDecrement: | |
| 32 movl 4(%esp), %ecx | |
| 33 movl $-1, %eax | |
| 34 lock | |
| 35 xaddl %eax, (%ecx) | |
| 36 decl %eax | |
| 37 ret | |
| 38 | |
| 39 // PRInt32 _PR_x86_AtomicSet(PRInt32 *val, PRInt32 newval) | |
| 40 // | |
| 41 // Atomically set the integer pointed to by 'val' to the new | |
| 42 // value 'newval' and return the old value. | |
| 43 // | |
| 44 // An alternative implementation: | |
| 45 // .text | |
| 46 // .globl _PR_x86_AtomicSet | |
| 47 // .align 4 | |
| 48 //_PR_x86_AtomicSet: | |
| 49 // movl 4(%esp), %ecx | |
| 50 // movl 8(%esp), %edx | |
| 51 // movl (%ecx), %eax | |
| 52 //retry: | |
| 53 // lock | |
| 54 // cmpxchgl %edx, (%ecx) | |
| 55 // jne retry | |
| 56 // ret | |
| 57 // | |
| 58 .text | |
| 59 .globl _PR_x86_AtomicSet | |
| 60 .align 4 | |
| 61 _PR_x86_AtomicSet: | |
| 62 movl 4(%esp), %ecx | |
| 63 movl 8(%esp), %eax | |
| 64 xchgl %eax, (%ecx) | |
| 65 ret | |
| 66 | |
| 67 // PRInt32 _PR_x86_AtomicAdd(PRInt32 *ptr, PRInt32 val) | |
| 68 // | |
| 69 // Atomically add 'val' to the integer pointed to by 'ptr' | |
| 70 // and return the result of the addition. | |
| 71 // | |
| 72 .text | |
| 73 .globl _PR_x86_AtomicAdd | |
| 74 .align 4 | |
| 75 _PR_x86_AtomicAdd: | |
| 76 movl 4(%esp), %ecx | |
| 77 movl 8(%esp), %eax | |
| 78 movl %eax, %edx | |
| 79 lock | |
| 80 xaddl %eax, (%ecx) | |
| 81 addl %edx, %eax | |
| 82 ret | |
| 83 | |
| 84 // Magic indicating no need for an executable stack | |
| 85 .section .note.GNU-stack, "", @progbits ; .previous | |
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Chromium Code Reviews
Issue 2078763002:
Delete bundled copy of NSS and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/nss@master