The Tor Browser / file comparison
comparison: nsprpub/pr/src/md/os2/os2emx.s
nsprpub/pr/src/md/os2/os2emx.s
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
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| -1:000000000000 | 0:d096362b812d |
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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_MD_ATOMIC_INCREMENT(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_MD_ATOMIC_INCREMENT | |
| 14 .align 4 | |
| 15 __PR_MD_ATOMIC_INCREMENT: | |
| 16 movl 4(%esp), %ecx | |
| 17 movl $1, %eax | |
| 18 lock | |
| 19 xaddl %eax, (%ecx) | |
| 20 incl %eax | |
| 21 ret | |
| 22 | |
| 23 / PRInt32 __PR_MD_ATOMIC_DECREMENT(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_MD_ATOMIC_DECREMENT | |
| 30 .align 4 | |
| 31 __PR_MD_ATOMIC_DECREMENT: | |
| 32 movl 4(%esp), %ecx | |
| 33 movl $-1, %eax | |
| 34 lock | |
| 35 xaddl %eax, (%ecx) | |
| 36 decl %eax | |
| 37 ret | |
| 38 | |
| 39 / PRInt32 __PR_MD_ATOMIC_SET(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_MD_ATOMIC_SET | |
| 47 / .align 4 | |
| 48 /__PR_MD_ATOMIC_SET: | |
| 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_MD_ATOMIC_SET | |
| 60 .align 4 | |
| 61 __PR_MD_ATOMIC_SET: | |
| 62 movl 4(%esp), %ecx | |
| 63 movl 8(%esp), %eax | |
| 64 xchgl %eax, (%ecx) | |
| 65 ret | |
| 66 | |
| 67 / PRInt32 __PR_MD_ATOMIC_ADD(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_MD_ATOMIC_ADD | |
| 74 .align 4 | |
| 75 __PR_MD_ATOMIC_ADD: | |
| 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 |
