gcc on Intel x86 and failure of -ffloat-store option
N8TM@aol.com
N8TM@aol.com
Fri Dec 31 20:54:00 GMT 1999
In a message dated 12/8/99 2:07:53 PM Pacific Standard Time,
beebe@math.utah.edu writes:
> -ffloat-store is ignored when optimization is
> turned on
It's not ignored, but the recent compiler versions often hoist the storage
outside of the loop. There are examples where -O2 causes some (but not all)
loop variables to be subjected to rounding to 53 bits each time, while adding
-ffloat-store causes the rounding to be postponed until after the loop. Not
the expected behavior.
Tim
tprince@computer.org
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