44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/**
|
|
* This file is part of the Fun programming language.
|
|
* https://fun-lang.xyz/
|
|
*
|
|
* Copyright 2025 Johannes Findeisen <you@hanez.org>
|
|
* Licensed under the terms of the Apache-2.0 license.
|
|
* https://opensource.org/license/apache-2-0
|
|
*/
|
|
|
|
/**
|
|
* @file load_global.c
|
|
* @brief Implements the OP_LOAD_GLOBAL opcode for loading global variables in the VM.
|
|
*
|
|
* This file handles the OP_LOAD_GLOBAL instruction, which loads a global variable
|
|
* onto the stack using its index.
|
|
*
|
|
* Behavior:
|
|
* - Loads the global variable at the specified index.
|
|
* - Pushes the value onto the stack.
|
|
*
|
|
* Error Handling:
|
|
* - Exits with an error if the index is out of bounds.
|
|
*
|
|
* Example:
|
|
* // Bytecode: OP_LOAD_GLOBAL 0
|
|
* // Stack before: []
|
|
* // Stack after: [global_value]
|
|
*
|
|
* @author Johannes Findeisen
|
|
* @date 2025-10-16
|
|
*/
|
|
|
|
case OP_LOAD_GLOBAL: {
|
|
int idx = inst.operand;
|
|
if (idx < 0 || idx >= MAX_GLOBALS) {
|
|
fprintf(stderr, "Runtime error: global index out of range\n");
|
|
exit(1);
|
|
}
|
|
#ifdef FUN_DEBUG
|
|
fprintf(stderr, "DEBUG LOAD_GLOBAL[%d]: type=%d\n", idx, vm->globals[idx].type);
|
|
#endif
|
|
push_value(vm, copy_value(&vm->globals[idx]));
|
|
break;
|
|
}
|