diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S b/sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S index 6851086..6d0a1f8 100644 --- a/sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S +++ b/sys/cddl/contrib/opensolaris/common/atomic/amd64/opensolaris_atomic.S @@ -20,8 +20,7 @@ */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. + * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. */ .file "atomic.s" @@ -30,14 +29,10 @@ #include <sys/asm_linkage.h> ENTRY(atomic_add_64_nv) - movq (%rdi), %rax -1: - movq %rsi, %rcx - addq %rax, %rcx + mov %rsi, %rax // %rax = delta addend lock - cmpxchgq %rcx, (%rdi) - jne 1b - movq %rcx, %rax + xaddq %rsi, (%rdi) // %rsi = old value, (%rdi) = sum + addq %rsi, %rax // new value = original value + delta ret SET_SIZE(atomic_add_64_nv) @@ -53,6 +48,13 @@ ret SET_SIZE(atomic_or_8_nv) + ENTRY(atomic_cas_32) + movl %esi, %eax + lock + cmpxchgl %edx, (%rdi) + ret + SET_SIZE(atomic_cas_32) + ENTRY(atomic_cas_64) movq %rsi, %rax lock |
