DRAFT IEEE Standard for Binary Floating-Point Arithmetic - Sonic.net
DRAFT IEEE Standard for Binary Floating-Point Arithmetic - Sonic.net
DRAFT IEEE Standard for Binary Floating-Point Arithmetic - Sonic.net
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<strong>DRAFT</strong> <strong>IEEE</strong> <strong>Standard</strong> <strong>for</strong> <strong>Floating</strong>-<strong>Point</strong> <strong>Arithmetic</strong> – 2003 August 12 10:20<br />
The 24 patterns of the <strong>for</strong>m 01x11x111x, 10x11x111x, or 11x11x111x (where<br />
an "x" denotes "don't care") are not generated in the result of an arithmetic<br />
operation. However, as listed in table 1c, these 24 bit patterns do map to valid<br />
numerical values.<br />
The bit pattern in a NaN significand can affect how the NaN is propagated; see<br />
section 6.2 <strong>for</strong> details.<br />
Basic Decimal Format Encoding Parameters<br />
Format Name decimal32 decimal64 decimal128<br />
Storage width 32 64 128<br />
Trailing significand field width<br />
t<br />
20 50 110<br />
Exponent field width w 6 8 12<br />
Combination field width 5 5 5<br />
Exponent bias 95 383 6143<br />
Table 1e: Decimal Encodings<br />
Copyright © 2003 by the Institute of Electrical and Electronics Engineers, Inc. This document is an unapproved<br />
draft of a proposed <strong>IEEE</strong>-SA <strong>Standard</strong> - USE AT YOUR OWN RISK. See statement on page 1.<br />
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