when the statement
if (-0 = 0)
is true then RoundTo schould not return an numer like -0 ?!
i think the point of view of an fpu is in the round functions not nessesary
0 is 0 and not -0
----- Original Message -----
From: "Jonas Maebe" <[EMAIL PROTECTED]>
To: "FPC developers' list" <fpc-devel@lists.freepascal.org>
Sent: Thursday, October 12, 2006 3:46 PM
Subject: Re: Re[2]: [fpc-devel] format function
On 12 okt 2006, at 15:41, Пётр Косаревский wrote:
In the othe case, if the user is supposed to understand, that he looks at
some representation of binary representation of a real number, "-0.000"
obviously means "little negative number".
No, it means the value 0, but with a negative sign. The value "-0" is
representable in an exact way on any IEEE standard-compliant fpu. The
reason is that fpu's have a separate bit to store the sign. So even
if the mantissa and exponent show that it's the value zero, the sign
bit can still be one (meaning that it's a negative zero). And for
some fpu calculations this even matters.
Jonas_______________________________________________
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