9 dcfs and dcfsu – ARM VERSION 1.2 User Manual
Page 304
Directives Reference
7-22
Copyright © 2000, 2001 ARM Limited. All rights reserved.
ARM DUI 0068B
7.3.9
DCFS and DCFSU
The
DCFS
directive allocates memory for word-aligned single-precision floating-point
numbers, and defines the initial runtime contents of the memory. Single-precision
numbers occupy one word and must be word aligned to be used in arithmetic operations.
DCDSU
is the same, except that the memory alignment is arbitrary.
Syntax
{label} DCFS{U} fpliteral{,fpliteral}...
where:
fpliteral
is a single-precision floating-point literal (see Floating-point literals on
page 3-22).
Usage
DCFS
inserts up to three bytes of padding before the first defined number, if necessary to
achieve 4-byte alignment.
Use
DCFSU
if you do not require alignment.
The range for single-precision values is:
•
maximum 3.40282347e+38
•
minimum 1.17549435e–38.
See also DCFD and DCFDU on page 7-21.
Example
DCFS 1E3,-4E-9
DCFSU 1.0,-.1,3.1E6