4.2. Directives that Change the Instruction Type

By default, the assembler begins assembling all instructions in a file as 32-bit instructions. You can change the default action by using command line options or the following directives.

.arch name

.arm

.code [16|32]

.cpu name

.fpu name

.syntax [unified | divided]

.thumb

.thumb_func

See Processor Options for compiler command line options related to these assembler directives.