Object Code Accelerator Manual

Preparing Programs for Acceleration

Object Code Accelerator Manual—528144-003

3-5

Passing Parameters in Registers

CODE (LOAD L+3); ! Loads value on stack from data segment

CODE (STRP 7); ! Set RP=7, imply no value returned

CODE (EXIT);

When the PCAL instruction in the following fragment calls procedure Q, it uses the

value left on the register stack.

CODE (PCAL Q);

CODE (STRP 0); ! Set RP=0, use value on stack

CODE (STOR L+4); ! Stores value on stack to data segment

OCA discards the LOAD L+3 instruction, unless you specify ReturnsR0 Q to tell the

OCA to preserve that value.