HLASM Language Reference

Conditional Assembly Instructions
Figure 95 (Page 2 of 2). Restrictions on Coding Expressions in Open Code
Expression
Character
(SETC)
Logical
(SETB)
Must not contain
System variables with local scope
Attribute references to system variables with local scope
Symbolic parameters
Predefined absolute symbols
Arithmetic expressions with the items listed above
Character expressions with the items listed above
Conditional Assembly Instructions
The remainder of this chapter describes, in detail, the syntax and rules for use of
each conditional assembler instruction. The following table lists the conditional
assembler instructions by type, and provides the page number where the instruction
is described in detail.
Figure 96. Assembler Instructions
Type of Instruction Instruction Page No.
Establishing SET symbols GBLA 344
GBLB 344
GBLC 344
LCLA 345
LCLB 345
LCLC 345
SETA 347
SETB 362
SETC 369
Branching ACTR 394
AGO 392
AIF 390
ANOP 395
External Function Calling SETAF 388
SETCF 389
Declaring SET Symbols
You must declare a global SET symbol before you can use it. The assembler
assigns an initial value to a global SET symbol at its first point of declaration.
Local SET symbols need not be declared explicitly with LCLA, LCLB, or LCLC
statements. The assembler considers any undeclared variable symbol found in the
name field of a SETA, SETB, SETC, SETAF, or SETCF statement to be a local
SET symbol. It is given the initial value specified in the operand field. If the
symbol in the name field is subscripted, it is declared as a subscripted SET symbol.
Chapter 9. How to Write Conditional Assembly Instructions 343