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Re: [avr-libc-dev] Math.h additions

From: Joerg Wunsch
Subject: Re: [avr-libc-dev] Math.h additions
Date: Tue, 12 Aug 2003 22:41:45 +0200
User-agent: Mutt/1.2.5i

[That'll be my last mail before finally leaving for vacation.]

As Colin O'Flynn wrote:

> 1) define NaN type (is 0xFFC0xxxx according to various
> FP libs and the readme)
> #define NAN 0xFFC00000

Well, that won't work.  Remember, these numbers are supposed to be FP
numbers, not integer numbers, yet they gotta compare equal to a certain
bit pattern of an FP number...

I once thought about that but don't have a solution.  GCC makes some
assumptions about the internal bit patterns which it can compare (IIRC),
but our NaN is different from GCC's assumptions.

> 2.5) Maybe define HUGE_VAL and HUGE_VALF

Same problem here.

I think a major polish of the FP library is due after 1.0 left the door.

J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/

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