Re: long double on 64 bit Intel
Re: long double on 64 bit Intel
- Subject: Re: long double on 64 bit Intel
- From: Jonas Maebe <email@hidden>
- Date: Wed, 8 Aug 2007 19:18:56 +0200
On 08 Aug 2007, at 18:01, Jeffrey Stopple wrote:
According to http://developer.apple.com/documentation/MacOSX/
Conceptual/universal_binary/universal_binary_diffs/
chapter_3_section_8.html
a long double is 128 bits on Intel Macs, but only 80 bits are
significant. Does this mean 80 bits of mantissa, or does that
include the exponent, and if so how is it divided up between
mantissa and exponent?
It's the native 80x87 "extended" type. It uses a 64 bit mantissa and
15 bit exponent.
Jonas
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