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OP_LOAD

Syntax and Stack

REG_NUM OP_STORE => REG_VAL

  • REG_NUM: The register number that the REG_VAL is loaded from. Values outside of the range 0-31 will fail the script. REG_NUM must be a Script Num (not a big number).
  • REG_VAL: The stack item from the register. Note: All registers start script execution with a StackElementType::VCH(0) in them.

Implementation

// get the top stack item, this is the register number we want to load the value from
int register_num  = top stack item;
// in the script machine there are only 32 registers (0-31)
// a register number higher than this a failure
if register_num > 31:
    script failure

// load the value in the register
StackItem register_value = arrRegisters.at(register_num);
PopStack(); // pop the register number off the stack
PushStack(value) // push the loaded value on to the stack
Script Example: 
push 5
OP_LOAD # pops the top stack item (5) and replaces it with the contents of that register

More Information

Read the document on Script Registers for more information about the uses and reasoning behind OP_LOAD.