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tests: complete exec tests (for now)

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Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2023-09-19 08:58:11 +05:30
parent fa96a4d09f
commit 1eb4a9545b
7 changed files with 411 additions and 143 deletions
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325
tests/cpu/arm/exec.cc
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@@ -2,6 +2,7 @@
#include "cpu/utility.hh"
#include "util/bits.hh"
#include <catch2/catch_test_macros.hpp>
#include <limits>
#include <variant>
class CpuFixture {
@@ -21,6 +22,12 @@ class CpuFixture {
}
CpuImpl cpu;
private:
class Null : public std::streambuf {
public:
int overflow(int c) override { return c; }
};
};
#define TAG "arm execution"
@@ -230,17 +237,18 @@ TEST_CASE_METHOD(CpuFixture, "Single Data Transfer", TAG) {
.pre = true };
SingleDataTransfer* data_transfer = std::get_if<SingleDataTransfer>(&data);
cpu.gpr[3] = 1596;
cpu.gpr[12] = 3;
cpu.gpr[7] = 6;
cpu.gpr[5] = -911111;
cpu.gpr[3] = 1596;
cpu.gpr[7] = 6;
cpu.gpr[5] = -911111;
// shifted register (immediate)
{
// 12768 + 6
cpu.bus->write_word(12774, 95995);
exec(data);
CHECK(cpu.gpr[5] == 95995);
cpu.gpr[5] = 0;
}
// shifted register (register)
@@ -252,7 +260,9 @@ TEST_CASE_METHOD(CpuFixture, "Single Data Transfer", TAG) {
.operand = 12,
} };
cpu.bus->write_word(12774, 3948123487);
cpu.gpr[12] = 2;
// 6384 + 6
cpu.bus->write_word(6390, 3948123487);
exec(data);
CHECK(cpu.gpr[5] == 3948123487);
@@ -733,4 +743,309 @@ TEST_CASE_METHOD(CpuFixture, "PSR Transfer", TAG) {
}
}
TEST_CASE_METHOD(CpuFixture, "Data Processing", TAG) {
InstructionData data =
DataProcessing{ .operand = Shift{ .rm = 3,
.data =
ShiftData{
.type = ShiftType::ROR,
.immediate = true,
.operand = 29,
} },
.rd = 5,
.rn = 7,
.set = true,
.opcode = OpCode::AND };
DataProcessing* processing = std::get_if<DataProcessing>(&data);
// operand 1
cpu.gpr[7] = -28717;
// AND with shifted register (imediate)
{
// rm
cpu.gpr[3] = 1596;
exec(data);
// -28717 & 12768
CHECK(cpu.gpr[5] == 448);
}
// AND with shifted register (register)
{
processing->operand = Shift{ .rm = 3,
.data = ShiftData{
.type = ShiftType::LSL,
.immediate = false,
.operand = 12,
} };
// rm
cpu.gpr[3] = 1596;
// rs
cpu.gpr[12] = 2;
exec(data);
// -28717 & 6384
CHECK(cpu.gpr[5] == 2256);
}
// same as above but with rn (oprerand 1) = 15
{
processing->rn = 15;
cpu.gpr[15] = -2871;
exec(data);
// (-2871 + INSTRUCTION_SIZE) & 6384
CHECK(cpu.gpr[5] == ((-2871 + INSTRUCTION_SIZE) & 6384));
// cleanup
processing->rn = 7;
}
auto flags = [this](bool n, bool z, bool v, bool c) {
CHECK(cpu.cpsr.n() == n);
CHECK(cpu.cpsr.z() == z);
CHECK(cpu.cpsr.v() == v);
CHECK(cpu.cpsr.c() == c);
cpu.cpsr.set_n(false);
cpu.cpsr.set_z(false);
cpu.cpsr.set_v(false);
cpu.cpsr.set_c(false);
};
// immediate operand
processing->operand = static_cast<uint32_t>(54924809);
// rs
cpu.gpr[12] = 2;
cpu.gpr[5] = 0;
SECTION("AND") {
processing->opcode = OpCode::AND;
exec(data);
// -28717 & 54924809
CHECK(cpu.gpr[5] == 54920705);
// check set flags
flags(false, false, false, false);
}
// TST with immediate operand
SECTION("TST") {
processing->opcode = OpCode::TST;
exec(data);
// -28717 & 54924809
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(false, false, false, false);
}
SECTION("EOR") {
processing->opcode = OpCode::EOR;
exec(data);
// -28717 ^ 54924809
CHECK(cpu.gpr[5] == 4240021978);
// check set flags
flags(true, false, false, false);
// check zero flag
processing->operand = static_cast<uint32_t>(-28717);
exec(data);
// -28717 ^ -28717
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(false, true, false, false);
}
SECTION("TEQ") {
processing->opcode = OpCode::TEQ;
exec(data);
// -28717 ^ 54924809
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(true, false, false, false);
}
SECTION("SUB") {
processing->opcode = OpCode::SUB;
exec(data);
// -28717 - 54924809
CHECK(cpu.gpr[5] == static_cast<uint32_t>(-54953526));
// check set flags
flags(true, false, false, true);
// check zero flag
processing->operand = static_cast<uint32_t>(-28717);
exec(data);
// -28717 - (-28717)
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(false, true, false, true);
}
SECTION("CMP") {
processing->opcode = OpCode::CMP;
exec(data);
// -28717 - 54924809
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(true, false, false, true);
}
SECTION("RSB") {
processing->opcode = OpCode::RSB;
exec(data);
// +28717 + 54924809
CHECK(cpu.gpr[5] == 54953526);
// check set flags
flags(false, false, false, false);
}
SECTION("ADD") {
processing->opcode = OpCode::ADD;
exec(data);
// -28717 + 54924809
CHECK(cpu.gpr[5] == 54896092);
// check set flags
flags(false, false, false, false);
// test zero flag
processing->operand = static_cast<uint32_t>(28717);
exec(data);
// -28717 + 28717
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(false, true, false, false);
// test overflow flag
processing->operand = static_cast<uint32_t>((1u << 31) - 1);
cpu.gpr[7] = (1u << 31) - 1;
exec(data);
CHECK(cpu.gpr[5] == (1ull << 32) - 2);
// check set flags
flags(true, false, true, false);
}
SECTION("CMN") {
processing->opcode = OpCode::CMN;
exec(data);
// -28717 + 54924809
CHECK(cpu.gpr[5] == 0);
// check set flags
flags(false, false, false, false);
}
SECTION("ADC") {
processing->opcode = OpCode::ADC;
cpu.cpsr.set_c(true);
exec(data);
// -28717 + 54924809 + carry
CHECK(cpu.gpr[5] == 54896093);
// check set flags
flags(false, false, false, false);
}
SECTION("SBC") {
processing->opcode = OpCode::SBC;
cpu.cpsr.set_c(false);
exec(data);
// -28717 - 54924809 + carry - 1
CHECK(cpu.gpr[5] == static_cast<uint32_t>(-54953527));
// check set flags
flags(true, false, false, false);
}
SECTION("RSC") {
processing->opcode = OpCode::RSC;
cpu.cpsr.set_c(false);
exec(data);
// +28717 +54924809 + carry - 1
CHECK(cpu.gpr[5] == 54953525);
// check set flags
flags(false, false, false, false);
}
SECTION("ORR") {
processing->opcode = OpCode::ORR;
exec(data);
// -28717 | 54924809
CHECK(cpu.gpr[5] == static_cast<uint32_t>(-24613));
// check set flags
flags(true, false, false, false);
}
SECTION("BIC") {
processing->opcode = OpCode::BIC;
exec(data);
// -28717 & ~54924809
CHECK(cpu.gpr[5] == static_cast<uint32_t>(-54949422));
// check set flags
flags(true, false, false, false);
}
SECTION("MVN") {
processing->opcode = OpCode::MVN;
exec(data);
// ~54924809
CHECK(cpu.gpr[5] == static_cast<uint32_t>(-54924810));
// check set flags
flags(true, false, false, false);
}
SECTION("R15 as destination") {
processing->opcode = OpCode::MVN;
processing->rd = 15;
cpu.gpr[15] = 0;
CHECK(cpu.spsr.raw() != cpu.cpsr.raw());
exec(data);
// ~54924809
CHECK(cpu.gpr[15] == static_cast<uint32_t>(-54924810));
// flags are not set
flags(false, false, false, false);
CHECK(cpu.spsr.raw() == cpu.cpsr.raw());
}
}
#undef TAG