On 08/17/2018 09:42 AM, Emilio G. Cota wrote:
>> +/* Through gcc 8, aarch64 has no support for 128-bit at all. */
>> +static inline Int128 atomic16_cmpxchg(Int128 *ptr, Int128 cmp, Int128 new)
>> +{
>> +uint64_t cmpl = cmp, cmph = cmp >> 64;
>> +uint64_t newl = new, newh = new >> 64;
> Her
On Wed, Aug 15, 2018 at 19:54:48 -0700, Richard Henderson wrote:
> GCC7+ will no longer advertise support for 16-byte __atomic operations
> if only cmpxchg is supported, as for x86_64. Fortunately, x86_64 still
> has support for __sync_compare_and_swap_16 and we can make use of that.
> AArch64 doe
On Wed, Aug 15, 2018 at 19:54:48 -0700, Richard Henderson wrote:
> GCC7+ will no longer advertise support for 16-byte __atomic operations
> if only cmpxchg is supported, as for x86_64. Fortunately, x86_64 still
> has support for __sync_compare_and_swap_16 and we can make use of that.
> AArch64 doe
GCC7+ will no longer advertise support for 16-byte __atomic operations
if only cmpxchg is supported, as for x86_64. Fortunately, x86_64 still
has support for __sync_compare_and_swap_16 and we can make use of that.
AArch64 does not have, nor ever has had such support, so open-code it.
Signed-off-b
