HLASM Language Reference

SETA Instruction
| X2A
Name Operation Operand
&OP1 SETA -344
&OP2 SETA 4
&VAR SETA (&OP1 SRL &OP2)
| Format: Function-invocation
| Operands: Character
| Output: X2A('hexstring') converts a character string argument containing
| hexadecimal digits to an arithmetic value.
| If the character string contains fewer than 8 characters, it is padded
| internally on the left with '' characters.
| Error conditions are detected if the argument contains invalid characters,
| or if the argument length exceeds 8 characters, generating the message
| ASMA214E.
| Null argument strings return zero.
| The result of the X2A function is the same as
| &value SETA X'hexstring'
| except that null strings are allowed by X2A but not by SETA.
| Examples
| X2A('11') has value 257
| X2A('C1') has value 193
| X2A('') has value
| X2A('FFFFFFF') has value -16
XOR
Format: Logical-expression
Operands: Arithmetic
Output: Each bit position in the result is set to 1 if the corresponding bit
positions in the two operands are unlike, otherwise the result bit is set to 0.
Example After the following statements &VAR contains the arithmetic value +8.
Name Operation Operand
&OP1 SETA 1
&OP2 SETA 2
&VAR SETA (&OP1 XOR &OP2)
Rules for Coding Arithmetic Expressions: The following is a summary of coding
rules for arithmetic expressions:
1. Unary (operating on one value) operators and binary (operating on two values)
operators are allowed in arithmetic expressions.
2. An arithmetic expression can have one or more unary operators preceding any
term in the expression or at the beginning of the expression. The unary
operators are + (positive) and − (negative).
3. The binary operators that can be used to combine the terms of an expression
are + (addition), − (subtraction), (multiplication), and / (division).
4. An arithmetic expression must not begin with a binary operator, and it must not
contain two binary operators in succession.
358 HLASM V1R5 Language Reference