pow.c

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/*
 * 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
 */


case OP_POW: {
 Value b = pop_value(vm);
 Value a = pop_value(vm);
 if (a.type != VAL_INT || b.type != VAL_INT) {
 fprintf(stderr, "POW expects ints\n");
 exit(1);
 }
 int64_t base = a.i;
 int64_t exp = b.i;
 int64_t res = 1;
 if (exp < 0) {
 res = 0;
 } else {
 while (exp > 0) {
 if (exp & 1) res *= base;
 base *= base;
 exp >>= 1;
 }
 }
 push_value(vm, make_int(res));
 free_value(a);
 free_value(b);
 break;
}