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#include "instruction.h"
#include "qtmipsexception.h"
struct InstructionMap {
const char *name;
};
#define IM_UNKNOWN {"UNKNOWN"}
const struct InstructionMap instruction_map[] = {
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
{"ADDI"},
{"ADDIU"},
{"SLTI"},
{"SLTIU"},
{"ANDI"},
{"ORI"},
{"XORI"},
{"LUI"},
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN,
IM_UNKNOWN
};
Instruction::Instruction() {
this->dt = 0;
}
Instruction::Instruction(std::uint32_t inst) {
this->dt = inst;
}
Instruction::Instruction(std::uint8_t opcode, std::uint8_t rs, std::uint8_t rt, std::uint8_t rd, std::uint8_t shamt, std::uint8_t funct) {
this->dt = 0;
this->dt |= opcode << 26;
this->dt |= rs << 21;
this->dt |= rt << 16;
this->dt |= rd << 11;
this->dt |= shamt << 6;
this->dt |= funct;
}
Instruction::Instruction(std::uint8_t opcode, std::uint8_t rs, std::uint8_t rt, std::uint16_t immediate) {
this->dt = 0;
this->dt |= opcode << 26;
this->dt |= rs << 21;
this->dt |= rt << 16;
this->dt |= immediate;
}
Instruction::Instruction(std::uint8_t opcode, std::uint32_t address) {
this->dt = 0;
this->dt |= opcode << 26;
this->dt |= address;
}
Instruction::Instruction(const Instruction &i) : Instruction(i.data()) { }
QString Instruction::to_str() {
if (this->opcode() >= sizeof(instruction_map))
return QString("UNKNOWN");
return QString(instruction_map[this->opcode()].name);
}
#define MASK(LEN,OFF) ((this->dt >> (OFF)) & ((1 << (LEN)) - 1))
std::uint8_t Instruction::opcode() const {
return (std::uint8_t) MASK(6, 26);
}
std::uint8_t Instruction::rs() const {
return (std::uint8_t) MASK(5, 21);
}
std::uint8_t Instruction::rt() const {
return (std::uint8_t) MASK(5, 16);
}
std::uint8_t Instruction::rd() const {
return (std::uint8_t) MASK(5, 11);
}
std::uint8_t Instruction::shamt() const {
return (std::uint8_t) MASK(5, 6);
}
std::uint8_t Instruction::funct() const {
return (std::uint8_t) MASK(6, 0);
}
std::uint16_t Instruction::immediate() const {
return (std::uint16_t) MASK(16, 0);
}
std::uint32_t Instruction::address() const {
return (std::uint32_t) MASK(26, 0);
}
std::uint32_t Instruction::data() const {
return this->dt;
}
bool Instruction::operator==(const Instruction &c) const {
return (this->data() == c.data());
}
bool Instruction::operator!=(const Instruction &c) const {
return ! this->operator==(c);
}
Instruction &Instruction::operator=(const Instruction &c) {
if (this != &c)
this->dt = c.data();
return *this;
}
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