diff options
Diffstat (limited to 'nsprpub/pr/src/md/unix/os_Linux_x86_64.s')
| -rw-r--r-- | nsprpub/pr/src/md/unix/os_Linux_x86_64.s | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/unix/os_Linux_x86_64.s b/nsprpub/pr/src/md/unix/os_Linux_x86_64.s new file mode 100644 index 0000000000..f30e75d538 --- /dev/null +++ b/nsprpub/pr/src/md/unix/os_Linux_x86_64.s @@ -0,0 +1,74 @@ +// -*- 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_x86_64_AtomicIncrement(PRInt32 *val) +// +// Atomically increment the integer pointed to by 'val' and return +// the result of the increment. +// + .text + .globl _PR_x86_64_AtomicIncrement + .type _PR_x86_64_AtomicIncrement, @function + .align 4 +_PR_x86_64_AtomicIncrement: + movl $1, %eax + lock + xaddl %eax, (%rdi) + incl %eax + ret + .size _PR_x86_64_AtomicIncrement, .-_PR_x86_64_AtomicIncrement + +// PRInt32 _PR_x86_64_AtomicDecrement(PRInt32 *val) +// +// Atomically decrement the integer pointed to by 'val' and return +// the result of the decrement. +// + .text + .globl _PR_x86_64_AtomicDecrement + .type _PR_x86_64_AtomicDecrement, @function + .align 4 +_PR_x86_64_AtomicDecrement: + movl $-1, %eax + lock + xaddl %eax, (%rdi) + decl %eax + ret + .size _PR_x86_64_AtomicDecrement, .-_PR_x86_64_AtomicDecrement + +// PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval) +// +// Atomically set the integer pointed to by 'val' to the new +// value 'newval' and return the old value. +// + .text + .globl _PR_x86_64_AtomicSet + .type _PR_x86_64_AtomicSet, @function + .align 4 +_PR_x86_64_AtomicSet: + movl %esi, %eax + xchgl %eax, (%rdi) + ret + .size _PR_x86_64_AtomicSet, .-_PR_x86_64_AtomicSet + +// PRInt32 _PR_x86_64_AtomicAdd(PRInt32 *ptr, PRInt32 val) +// +// Atomically add 'val' to the integer pointed to by 'ptr' +// and return the result of the addition. +// + .text + .globl _PR_x86_64_AtomicAdd + .type _PR_x86_64_AtomicAdd, @function + .align 4 +_PR_x86_64_AtomicAdd: + movl %esi, %eax + lock + xaddl %eax, (%rdi) + addl %esi, %eax + ret + .size _PR_x86_64_AtomicAdd, .-_PR_x86_64_AtomicAdd + +// Magic indicating no need for an executable stack +.section .note.GNU-stack, "", @progbits |