// Copyright 2024 Gabriel Bjørnager Jensen.
//
// This file is part of Pollex.
//
// Pollex is free software: you can redistribute it
// and/or modify it under the terms of the GNU Af-
// fero General Public License as published by the
// Free Software Foundation, either version 3 of
// the License, or (at your option) any later ver-
// sion.
//
// Pollex is distributed in the hope that it will
// be useful, but WITHOUT ANY WARRANTY; without
// even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Affero General Public License for more details.
//
// You should have received a copy of the GNU Af-
// fero General Public License along with Pollex.
// If not, see <https://www.gnu.org/licenses/>.

use crate::arm32::{
	Predicate,
	Flag,
	Instruction,
	Register,
	Shifter,
	Signed,
	Unsigned,
};

use alloc::format;
use alloc::vec::Vec;

#[test]
fn test_arm32_instruction() {
	let tree = [
		Instruction::BranchLink {
			predicate: Predicate::HigherOrSame,
			immediate: Signed::new(0x1F),
		},

		Instruction::Breakpoint {
			immediate: Unsigned::new(0x45),
		},

		Instruction::SoftwareInterrupt {
			predicate: Predicate::Always,
			immediate: Unsigned::new(0x54),
		},

		Instruction::Move {
			predicate:   Predicate::Plus,
			destination: Register::Pc,
			source:      Shifter::ArithmeticShiftRightImmediate { source: Register::R3, shift: Unsigned::new(0x20) },
			s:           Flag::On,
		},
	];

	let mut displays = Vec::with_capacity(tree.len());
	let mut opcodes  = Vec::with_capacity(tree.len());

	for instruction in tree {
		displays.push(format!("{instruction}"));
		opcodes.push(instruction.encode_arm().unwrap());
	}

	assert_eq!(
		displays,
		[
			"BLHS <#+31>",
			"BKPT #69",
			"SWI #84",
			"MOVPLS pc, r3, ASR #32",
		],
	);

	assert_eq!(
		opcodes,
		[
			0b00101010_00000000_00000000_00000000,
			0b11100001_00100000_00000100_01110101,
			0b11101111_00000000_00000000_01010100,
			0b01010001_10110000_11110000_01000011,
		],
	)
}

// 01010001101100001111000001000011
// 01010001101100001111000001000011