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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /nsprpub/pr/src/md/os2/os2emx.s | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'nsprpub/pr/src/md/os2/os2emx.s')
-rw-r--r-- | nsprpub/pr/src/md/os2/os2emx.s | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/os2/os2emx.s b/nsprpub/pr/src/md/os2/os2emx.s new file mode 100644 index 000000000..ef18e3bb1 --- /dev/null +++ b/nsprpub/pr/src/md/os2/os2emx.s @@ -0,0 +1,82 @@ +/ -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- +/ +/ This Source Code Form is subject to the terms of the Mozilla Public +/ License, v. 2.0. If a copy of the MPL was not distributed with this +/ file, You can obtain one at http://mozilla.org/MPL/2.0/. + +/ PRInt32 __PR_MD_ATOMIC_INCREMENT(PRInt32 *val) +/ +/ Atomically increment the integer pointed to by 'val' and return +/ the result of the increment. +/ + .text + .globl __PR_MD_ATOMIC_INCREMENT + .align 4 +__PR_MD_ATOMIC_INCREMENT: + movl 4(%esp), %ecx + movl $1, %eax + lock + xaddl %eax, (%ecx) + incl %eax + ret + +/ PRInt32 __PR_MD_ATOMIC_DECREMENT(PRInt32 *val) +/ +/ Atomically decrement the integer pointed to by 'val' and return +/ the result of the decrement. +/ + .text + .globl __PR_MD_ATOMIC_DECREMENT + .align 4 +__PR_MD_ATOMIC_DECREMENT: + movl 4(%esp), %ecx + movl $-1, %eax + lock + xaddl %eax, (%ecx) + decl %eax + ret + +/ PRInt32 __PR_MD_ATOMIC_SET(PRInt32 *val, PRInt32 newval) +/ +/ Atomically set the integer pointed to by 'val' to the new +/ value 'newval' and return the old value. +/ +/ An alternative implementation: +/ .text +/ .globl __PR_MD_ATOMIC_SET +/ .align 4 +/__PR_MD_ATOMIC_SET: +/ movl 4(%esp), %ecx +/ movl 8(%esp), %edx +/ movl (%ecx), %eax +/retry: +/ lock +/ cmpxchgl %edx, (%ecx) +/ jne retry +/ ret +/ + .text + .globl __PR_MD_ATOMIC_SET + .align 4 +__PR_MD_ATOMIC_SET: + movl 4(%esp), %ecx + movl 8(%esp), %eax + xchgl %eax, (%ecx) + ret + +/ PRInt32 __PR_MD_ATOMIC_ADD(PRInt32 *ptr, PRInt32 val) +/ +/ Atomically add 'val' to the integer pointed to by 'ptr' +/ and return the result of the addition. +/ + .text + .globl __PR_MD_ATOMIC_ADD + .align 4 +__PR_MD_ATOMIC_ADD: + movl 4(%esp), %ecx + movl 8(%esp), %eax + movl %eax, %edx + lock + xaddl %eax, (%ecx) + addl %edx, %eax + ret |