HLASM Language Reference

SETA Instruction
SRA
SRL
Example
After the following statements &VAR contains the arithmetic value +4.
Name Operation Operand
&OP1 SETA 1
&OP2 SETA 2
&VAR SETA (&OP1 SLL &OP2)
Format: Logical-expression
Operands: Arithmetic
Output: The 31-bit numeric part of the signed first operand is shifted right the
number of bits specified in the rightmost six bits of the second operand. The
sign of the first operand remains unchanged. Bits shifted out of bit position 31
are lost. Bits equal to the sign are used to fill the vacated bit positions on the
left.
Examples
After the following statements &VAR contains the arithmetic value +2.
Name Operation Operand
&OP1 SETA 1
&OP2 SETA 2
&VAR SETA (&OP1 SRA &OP2)
After the following statements &VAR contains the arithmetic value −1.
Name Operation Operand
&OP1 SETA -344
&OP2 SETA 4
&VAR SETA (&OP1 SRA &OP2)
Compare this result with the result in the second example under SRL below.
Format: Logical-expression
Operands: Arithmetic
Output: The 32-bit first operand is shifted right the number of bits specified in
the rightmost six bits of the second operand. Bits shifted out of bit position 31
are lost. Zeros are used to fill the vacated bit positions on the left.
Examples
After the following statements &VAR contains the arithmetic value +2.
Name Operation Operand
&OP1 SETA 1
&OP2 SETA 2
&VAR SETA (&OP1 SRL &OP2)
After the following statements &VAR contains the arithmetic value .
Chapter 9. How to Write Conditional Assembly Instructions 357