ARM Compiler toolchain Using the Assembler: Numeric literals

Numeric literals

Numeric literals can take any of the following forms:

decimal-digits

0xhexadecimal-digits

&hexadecimal-digits

n_base-n-digits

'character'

where:

decimal-digits: Is a sequence of characters using only the digits 0 to 9.
hexadecimal-digits: Is a sequence of characters using only the digits 0 to 9 and the letters A to F or a to f.
n_: Is a single digit between 2 and 9 inclusive, followed by an underscore character.
base-n-digits: Is a sequence of characters using only the digits 0 to (n -1)
character: Is any single character except a single quote. Use the standard C escape character (\') if you require a single quote. The character must be enclosed within opening and closing single quotes. In this case the value of the numeric literal is the numeric code of the character.

You must not use any other characters. The sequence of characters must evaluate to an integer in the range 0 to 2³²-1 (except in DCQ and DCQU directives, where the range is 0 to 2⁶⁴-1).

Examples

a       SETA    34906

addr    DCD     0xA10E

        LDR     r4,=&1000000F

        DCD     2_11001010

c3      SETA    8_74007

        DCQ     0x0123456789abcdef
        LDR     r1,='A'             ; pseudo-instruction loading 65 into r1
        ADD     r3,r2,#'\''         ; add 39 to contents of r2, result to r3

Copyright © 2010-2012 ARM. All rights reserved.	ARM DUI 0473G
Non-Confidential	ID021412
PDF version

Numeric literals

Examples

See also