Comments (1)
I do not know for IA64, but for AMD64 (x64), due to the way the CPU is
organized, 32-bit arithmetic is never slower than 64-bit (they are the same
instructions internally, and the 64-bit one are extensions thus requiring more
decoding, not less.)
On the other hand, 32-bit integers would use less memory and need less code
space for "REX.W" prefixes or for negative constants, so the overall cache
efficiency would be likely better.
Original comment by [email protected]
on 31 Dec 2014 at 4:56
from msinttypes.
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