ExternalVendorCode/corda
1
0
Fork 0
mirror of https://github.com/corda/corda.git synced 2025-01-09 06:23:04 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

support atomicCompareAndSwap on powerpc for GCC versions prior to 4.1

Browse Source
This commit is contained in:
Joel Dice 2009-11-20 15:14:27 -07:00
parent f75868b394
commit 2276eece0e
1 changed files with 22 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/powerpc.h
View File

@ -91,16 +91,33 @@ syncInstructionCache(const void* start, unsigned size)
} }
#ifdef USE_ATOMIC_OPERATIONS #ifdef USE_ATOMIC_OPERATIONS
# if (__GNUC__ >= 4) && (__GNUC_MINOR__ >= 1)
inline bool inline bool
atomicCompareAndSwap(uintptr_t* p, uintptr_t old, uintptr_t new_) atomicCompareAndSwap(uintptr_t* p, uintptr_t old, uintptr_t new_)
{ {
#if (__GNUC__ >= 4) && (__GNUC_MINOR__ >= 1)
return __sync_bool_compare_and_swap(p, old, new_); return __sync_bool_compare_and_swap(p, old, new_);
}
#else // not GCC >= 4.1 #else // not GCC >= 4.1
// todo: implement using inline assembly bool result;
# undef USE_ATOMIC_OPERATIONS
__asm__ __volatile__(" sync\n"
"1:\n"
" lwarx %0,0,%2\n"
" cmpw %0,%3\n"
" bne- 2f\n"
" stwcx. %4,0,%2\n"
" bne- 1b\n"
" isync \n"
"2:\n"
" xor %0,%0,%3\n"
" cntlzw %0,%0\n"
" srwi %0,%0,5\n"
: "=&r"(result), "+m"(*p)
: "r"(p), "r"(old), "r"(new_)
: "cc", "memory");
return result;
#endif // not GCC >= 4.1 #endif // not GCC >= 4.1
}
#endif // USE_ATOMIC_OPERATIONS #endif // USE_ATOMIC_OPERATIONS
inline uint64_t inline uint64_t