Chapter 28.

Motorola M88K Dependent Features

28.1. M88K Machine Directives

The M88K version of the assembler supports the following machine directives:

.align

This directive aligns the section program counter on the next 4 byte boundary.

.dfloat expr

This assembles a double precision (64 bit) floating point constant.

.ffloat expr

This assembles a single precision (32 bit) floating point constant.

.half expr

This directive assembles a half word (16 bit) constant.

.word expr

This assembles a word (32 bit) constant.

.string "str"

This directive behaves like the standard

.ascii

directive for copying

str

into the object file.

The string is not terminated with a null byte.

.set symbol, value

This directive creates a symbol named

symbol

which is an alias for another symbol (possibly not

yet defined). This should not be confused with the mnemonic

set

, which is a legitimate M88K

instruction.

.def symbol, value

This directive is synonymous with

.set

and is presumably provided for compatibility with other

M88K assemblers.

.bss symbol, length, align

Reserve

length

bytes in the bss section for a local

symbol

, aligned to the power of two speci 

fied by

align

.

length

and

align

must be positive absolute expressions. This directive differs

from

.lcomm

only in that it permits you to specify an alignment. Section 8.52

.lcomm symbol,

length

.