ARMTHE WORLD’S MOST POPULAR 32BIT EMBEDDED PROCESSOR 363
10.13 | Starting Assembly Language
Programming
If you have any previous experience of assembly language programming, you will know
that there are two items used therein—instructions and directives—the former are exe-
cutable statements which are ‘executed’ by the processor. e latter, that is, directives are
non-executable statements relating to the assembler. ey are used to give the assembler
necessary information to perform the assembly process smoothly. For some processors,
directives are also called pseudo instructions. For ARM, pseudo instructions are special
directives issued to the processor which causes certain instructions to be executed. us,
they are also executable ...