4 Dec
2014
4 Dec
'14
2:21 p.m.
On Dec 4, 2014, at 1:50 PM, Peter Corlett <abuse at
cabal.org.uk> wrote:
On Tue, Dec 02, 2014 at 03:32:38PM -0800, Fred Cisin wrote:
Really? Where have you been? OS X the default has been to compile for 64-bits
in which case sizeof(int) == sizeof(int64_t) since Leopard (10.5) in 2009. The kernel
went default 64-bits in Snow Leopard (10.6) in 2010. OS X on x86 has always
supported mixed 32/64 bit applications (as long as the CPU did) regardless of what
the kernel was (a 32-bit kernel could run 64-bit applications).
TTFN - Guy
. . .
>>> long long int A;
>>> int B;
>>> A = B << 32;
[...]
So, should the compiler optimize that to
MOV X,0
or
NOP
?
So on systems where sizeof(int) <= sizeof(int32_t) -- which is everything that
matters