From: GOTO Kentaro <gotoken@...>
Date: 2004-10-16T04:02:31+09:00
Subject: Re: "nan".to_f ?

Hi, 

In message Re: "nan".to_f ?
 on Sat, 16 Oct 2004 03:44:14 +0900, Yukihiro Matsumoto wrote:

> |When we are talking about Ruby, NaN means IEEE 754's NaN, isn't it?  :)
> 
> C99 defines isnan() and isinf().  I'm not sure C99 assumes IEEE 754.

That is very IEEE 754 support. 

ISO/IEC 9899:1999 Annex F says:

  F.1 Introduction

  This annex specifies C language support for the IEC 60559
  floating-point standard. The IEC 60559 floating-point standard is
  specifically Binary floating-point arithmetic for microprocessor
  systems, second edition (IEC 60559:1989), previously designated IEC
  559:1989 and as IEEE Standard for Binary Floating-Point Arithmetic
  (ANSI/IEEE 754-1985). ...

Gotoken