Load Address Relative Long (LARL) is a powerful instruction that can be used to reduce the number of registers your program uses. This is a new article for the website that can be accessed here.
Review an Instruction: LARL
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4 thoughts on “Review an Instruction: LARL”
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“LARL can reduce the number of base registers that are needed in your program because it can reach roughly +/- 2 Gigabytes from the address where it is coded.”
A BAL coder of sound mind would never contemplate 2³¹ of addressability in a single module. Really. Never.
Good point. Still, You can get register relief with shorter programs by using instructions like LARL.
I think you have a typo. The 24-bit description should read:
“With 24-bit addressing, the address is placed in the operand one register using bit positions 40-63, bits 32-39 are set to 0’s, and bits 0-31 are unchanged”
Thanks, I corrected it.