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Add 6809 BGT tests.

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2018-11-10 20:30:38 +00:00
parent 8b12ed23e8
commit b82ca402bf
1 changed files with 69 additions and 0 deletions
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69
MC6809/unittest/mc6809_tests.cpp
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@ -822,3 +822,72 @@ TEST_CASE("Subtract Memory from Register", "[SUB][SUBA]") {
REQUIRE(cpu.cycles() == 4);
}
}
TEST_CASE(" Branch if Greater Than Zero", "[BGT]") {
Board board;
board.initialise();
auto& cpu = board.CPU();
cpu.step(); // Step over the reset
board.poke(0, 0x2e); // BGT
board.poke(1, 0x03);
board.poke(2, 0x86); // LDA #1
board.poke(3, 0x01);
board.poke(4, 0x12); // NOP
board.poke(5, 0x86); // LDA #2
board.poke(6, 0x02);
board.poke(7, 0x12); // NOP
SECTION("BGT1") {
cpu.A() = 0;
cpu.CC() = EightBit::mc6809::ZF;
cpu.step();
cpu.step();
REQUIRE(cpu.A() == 1);
}
cpu.reset();
cpu.step();
SECTION("BGT2") {
REQUIRE(cpu.PC() == 0);
cpu.CC() = 0;
cpu.step();
cpu.step();
REQUIRE(cpu.A() == 2);
}
cpu.reset();
cpu.step();
SECTION("BGT3") {
REQUIRE(cpu.PC() == 0);
cpu.CC() = EightBit::mc6809::NF;
cpu.step();
cpu.step();
REQUIRE(cpu.A() == 1);
}
cpu.reset();
cpu.step();
SECTION("BGT4") {
REQUIRE(cpu.PC() == 0);
cpu.CC() = EightBit::mc6809::NF | EightBit::mc6809::VF;
cpu.step();
cpu.step();
REQUIRE(cpu.A() == 2);
}
cpu.reset();
cpu.step();
SECTION("BGT5") {
REQUIRE(cpu.PC() == 0);
cpu.CC() = EightBit::mc6809::ZF | EightBit::mc6809::NF;
cpu.step();
cpu.step();
REQUIRE(cpu.A() == 1);
}
}