Arm VERSION 1.2 Bedienungsanleitung PDF herunterladen (Seite 100)

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101

Assembler Reference

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

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

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 359 360

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