Chapter 28. Motorola M88K Dependent Features

28.1. M88K Machine Directives

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


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 specified 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 8.50 .lcomm symbol, length.