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89 lines
2.7 KiB
Plaintext
89 lines
2.7 KiB
Plaintext
//
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// m68kDecoderTests.m
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// Clock Signal
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//
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// Created by Thomas Harte on 18/04/2022.
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// Copyright 2022 Thomas Harte. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#include "../../../InstructionSets/68k/Decoder.hpp"
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using namespace InstructionSet::M68k;
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@interface m68kDecoderTests : XCTestCase
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@end
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namespace {
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template <int index> NSString *operand(Preinstruction instruction) {
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switch(instruction.mode<index>()) {
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default: return @"";
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case AddressingMode::DataRegisterDirect:
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return [NSString stringWithFormat:@"D%d", instruction.reg<index>()];
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case AddressingMode::AddressRegisterDirect:
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return [NSString stringWithFormat:@"A%d", instruction.reg<index>()];
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case AddressingMode::AddressRegisterIndirect:
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return [NSString stringWithFormat:@"(A%d)", instruction.reg<index>()];
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case AddressingMode::AddressRegisterIndirectWithPostincrement:
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return [NSString stringWithFormat:@"(A%d)+", instruction.reg<index>()];
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case AddressingMode::AddressRegisterIndirectWithPredecrement:
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return [NSString stringWithFormat:@"-(A%d)", instruction.reg<index>()];
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}
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}
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}
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@implementation m68kDecoderTests
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- (NSString *)operand:(int)operand instruction:(Preinstruction)instruction {
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return @"";
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}
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- (void)testInstructionSpecs {
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NSData *const testData =
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[NSData dataWithContentsOfURL:
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[[NSBundle bundleForClass:[self class]]
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URLForResource:@"68000ops"
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withExtension:@"json"
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subdirectory:@"68000 Decoding"]];
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NSDictionary<NSString *, NSString *> *const decodings = [NSJSONSerialization JSONObjectWithData:testData options:0 error:nil];
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XCTAssertNotNil(decodings);
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Predecoder<Model::M68000> decoder;
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for(int instr = 0; instr < 65536; instr++) {
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NSString *const instrName = [NSString stringWithFormat:@"%04x", instr];
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NSString *const expected = decodings[instrName];
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XCTAssertNotNil(expected);
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const auto found = decoder.decode(uint16_t(instr));
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NSString *instruction;
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switch(found.operation) {
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case Operation::Undefined: instruction = @"None"; break;
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case Operation::NOP: instruction = @"NOP"; break;
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case Operation::ABCD: instruction = @"ABCD"; break;
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case Operation::SBCD: instruction = @"SBCD"; break;
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case Operation::NBCD: instruction = @"NBCD"; break;
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// For now, skip any unmapped operations.
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default: continue;
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}
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NSString *const operand1 = operand<0>(found);
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NSString *const operand2 = operand<1>(found);
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if(operand1.length) instruction = [instruction stringByAppendingFormat:@" %@", operand1];
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if(operand2.length) instruction = [instruction stringByAppendingFormat:@", %@", operand2];
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XCTAssertEqualObjects(instruction, expected, "%@ should decode as %@; got %@", instrName, expected, instruction);
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}
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}
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@end
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