32 lines
740 B
C
32 lines
740 B
C
/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*/
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/**
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* @file swap.c
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* @brief Implements the OP_SWAP opcode for stack manipulation in the VM.
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*
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* This file handles the OP_SWAP instruction, which swaps the top two values
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* on the stack.
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*
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* Behavior:
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* - Swaps stack[sp] and stack[sp-1]
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* - No type checking
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*
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* Error Handling:
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* - Exits if stack underflow
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*/
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case OP_SWAP: {
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vm_require_stack(vm, 2);
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Value a = vm->stack[vm->sp];
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Value b = vm->stack[vm->sp - 1];
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vm->stack[vm->sp] = b;
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vm->stack[vm->sp - 1] = a;
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break;
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}
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