| /SPARTAN/trunk/arch/ia32/src/atomic.S |
|---|
| 28,48 → 28,10 |
| .text |
| .global atomic_inc |
| atomic_inc: |
| pushl %ebx |
| movl 8(%esp),%ebx |
| #ifdef __SMP__ |
| lock incl (%ebx) |
| #else |
| incl (%ebx) |
| #endif |
| popl %ebx |
| ret |
| .global atomic_dec |
| atomic_dec: |
| pushl %ebx |
| movl 8(%esp),%ebx |
| #ifdef __SMP__ |
| lock decl (%ebx) |
| #else |
| decl (%ebx) |
| #endif |
| popl %ebx |
| ret |
| #ifdef __SMP__ |
| .global test_and_set |
| .global spinlock_arch |
| test_and_set: |
| pushl %ebx |
| movl 8(%esp),%ebx |
| movl $1,%eax |
| xchgl %eax,(%ebx) # xchg implicitly turns on the LOCK signal |
| popl %ebx |
| ret |
| # |
| # This is a bus-and-hyperthreading-friendly implementation of spinlock |
| # |