Is this a bug? Can do mov r0, #676

[Jay Monkman]

I'm using a cross assembler for ARM, running on x86, and seeing something weird.

Here's the test program:

foo:
        mov     r0, #675

Assemble with this:
arm-linux-as -o foo.o foo.S

Here's what happens:
        arm-linux-as -o foo.o foo.s
        foo.s: Assembler messages:
        foo.s:0: Warning: end of file not at end of a line; newline inserted
        foo.s:2: Error: invalid constant -- `mov r7,#675'

If the number is 676 it works fine.

I've tried with the following binutils versions with identical results.
        2.13.2.1
        2.15.
        2.16.1

Immediate operands are limited to 8 bits. Then why does 676 work?