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3-22 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
3.6.5 Floating-point literals
Floating-point literals can take any of the following forms:
{-}digits E{-}digits
{-}{digits}.digits{E{-}digits}
0xhexdigits
&hexdigits
digits
are sequences of characters using only the digits 0 to 9. You can write
E
in uppercase or lowercase. These forms correspond to normal
floating-point notation.
hexdigits
are sequences of characters using only the digits 0 to 9 and the letters
A to F or a to f. These forms correspond to the internal representation of
the numbers in the computer. Use these forms to enter infinities and
NaNs, or if you want to be sure of the exact bit patterns you are using.
The range for single-precision floating point values is:
• maximum 3.40282347e+38
• minimum 1.17549435e–38.
The range for double-precision floating point values is:
• maximum 1.79769313486231571e+308
• minimum 2.22507385850720138e–308.
Examples
DCFD 1E308,-4E-100
DCFS 1.0
DCFD 3.725e15
LDFS 0x7FC00000 ; Quiet NaN
LDFD &FFF0000000000000 ; Minus infinity