Motorola MVME177 manual Double Precision Real, Extended Precision Real, Packed Decimal Real

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Debugger General Information

Double Precision Real

This format would appear in memory as:

1-bit sign Þeld	(1 binary digit)
11-bit biased exponent Þeld	(3 hex digits. Bias = $3FF)
52-bit fraction Þeld	(13 hex digits)

A double precision number requires 8 bytes in memory.

Note The single and double precision formats have an implied integer bit (always 1).

Extended Precision Real

This format would appear in memory as:

1-bit sign Þeld	(1 binary digit)
15-bit biased exponent Þeld	(4 hex digits. Bias = $3FFF)
64-bit mantissa Þeld	(16 hex digits)

An extended precision number requires 10 bytes in memory.

Packed Decimal Real

This format would appear in memory as:

4-bit sign Þeld	(4 binary digits)
16-bit exponent Þeld	(4 hex digits)
68-bit mantissa Þeld	(17 hex digits)

A packed decimal number requires 12 bytes in memory.

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