Re: [PATCH] pp.c:pp_pow() -- quit when you're done

On Sun, 16 Jun 2002 12:45:30 +0100, nick@unfortu.net (Nicholas Clark)
wrote:

> For information (which I don't think has reached p5p) the reason for having
> messy loops in pp_pow rather than using pow() or log(), exp() and a multiply
> is that on Irix with longdoubles, 2**31 was giving a floating point value
> slightly *less* than 1<<31, which was really screwing up some tests.
> (and by implication (nearly) every perl programmer's assumption that 2**n
> is an integer)

Perhaps it had the same floating-point engine as my first "scientific"
calculator, for which 2**32 was 4294967295 (i.e. one less than the
correct answer).

Cheers,
Philip

• [PATCH] pp.c:pp_pow() -- quit when you're done by Craig A. Berry
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Tels
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Benjamin Goldberg
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Nicholas Clark
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Philip Newton
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Nicholas Clark
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Jarkko Hietaniemi
• Re: [PATCH] pp.c:pp_pow() -- quit when you're done by Craig A. Berry