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// ================================================================================================
// Code written while reading chapter 11 of Modern Arm Assembly Language Programming
//
// License:
// SPDX-License-Identifier: 0BSD
// Copyright (c) 2026 Hunter Kvalevog
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE.
// ================================================================================================
#include <stdint.h>
#include <stdio.h>
// example 1
int32_t i32_add_sub(int32_t a, int32_t b, int32_t c);
int64_t i64_add_sub(int64_t a, int64_t b, int64_t c);
// example 2
int32_t i32_mul(int32_t a, int32_t b);
int64_t i32_mul_safe(int32_t a, int32_t b);
// example 3
void i32_quo_rem(int32_t num, int32_t den, int32_t *quo, int32_t *rem);
// example 4
int32_t test_ldr1(int32_t i, int64_t j, int32_t *tab);
// example 5
void test_mov1(uint32_t *tab);
int main(int argc, const char* argv[])
{
#define X(FMT, CODE) printf(#CODE ": " FMT "\n", CODE)
// example 1
X("%d", i32_add_sub(5, 3, 1));
X("%lld", i64_add_sub(5, 3, 1));
// example 2
X("%d", i32_mul(5, 6));
X("%d", i32_mul(2000000000, 4));
X("%lld", i32_mul_safe(5, 6));
X("%lld", i32_mul_safe(2000000000, 4));
#undef X
#define X(CODE) CODE; printf(#CODE ": quo=%d rem=%d\n", quo, rem)
// example 3
int32_t quo = 0;
int32_t rem = 0;
X(i32_quo_rem(6, 3, &quo, &rem));
X(i32_quo_rem(7, 3, &quo, &rem));
#undef X
#define X(FMT, CODE) printf(#CODE ": " FMT "\n", CODE)
// example 4
int32_t tab[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
X("%d", test_ldr1(0, 0, tab));
// example 5
uint32_t out[3] = { 0, 0, 0 };
test_mov1(out);
printf("test_mov1(out):\n");
printf(" out[0] = 0x%X\n", out[0]);
printf(" out[1] = 0x%X\n", out[1]);
printf(" out[2] = 0x%X\n", out[2]);
}
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