Reference Guide

Chapter 4 95

Assembler Directives and Pseudo-Operations

.LISTOFF and .LISTON Directives

The .LISTOFF and .LISTON directives control the expansion of

instructions for all macro invocations, all predeﬁned subspace

declarations, and the .ENTER and .LEAVE pseudo-operations. .LISTOFF

causes the Assembler to cease listing expanded instructions until a

.LISTON directive is encountered. .LISTON causes the Assembler to list

expanded instructions until a .LISTOFF directive is encountered.

The default is .LISTON.

Syntax

.LISTOFF

.LISTON

Example

The following is the deﬁnition of the macro DECR. It is referred to in the

assembly listing generated when .LISTON was used with a procedure

containing the macro invocation.

DECR .MACRO LAB,VAL

SKF ADDIL L’VAL-$global$,%dp

LDW R’VAL-$global$(%r1),%r20

LAB ADDIBF,=,N -1,%r20,LAB

.ENDM

.CODE

.IMPORT $global$

.IMPORT mark

.IMPORT count

.PROC

call_DECR

.CALLINFO FRAME=0, SAVE_RP

.ENTER

DECR mark,count

.LEAVE

.PROCEND