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nasmdoc: document octal/binary floating-point

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Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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H. Peter Anvin 2010-05-07 13:21:20 -07:00
parent c8d8a13cde
commit 19cbe0c1c4
1 changed files with 9 additions and 5 deletions
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doc/nasmdoc.src
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@ -1619,11 +1619,15 @@ Floating-point constants are expressed in the traditional form:
digits, then a period, then optionally more digits, then optionally an
\c{E} followed by an exponent. The period is mandatory, so that NASM
can distinguish between \c{dd 1}, which declares an integer constant,
and \c{dd 1.0} which declares a floating-point constant. NASM also
support C99-style hexadecimal floating-point: \c{0x}, hexadecimal
digits, period, optionally more hexadeximal digits, then optionally a
\c{P} followed by a \e{binary} (not hexadecimal) exponent in decimal
notation.
and \c{dd 1.0} which declares a floating-point constant.
NASM also support C99-style hexadecimal floating-point: \c{0x},
hexadecimal digits, period, optionally more hexadeximal digits, then
optionally a \c{P} followed by a \e{binary} (not hexadecimal) exponent
in decimal notation. As an extension, NASM additionally supports the
\c{0h} and \c{$} prefixes for hexadecimal, as well binary and octal
floating-point, using the \c{0b} or \c{0y} and \c{0o} or \c{0q}
prefixes, respectively.
Underscores to break up groups of digits are permitted in
floating-point constants as well.