diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/isa/mod.rs | 4 | ||||
| -rw-r--r-- | src/isa/opcodes.rs | 2 | ||||
| -rw-r--r-- | src/simulator.rs | 7 |
3 files changed, 13 insertions, 0 deletions
diff --git a/src/isa/mod.rs b/src/isa/mod.rs index 9da1751..8a6e65b 100644 --- a/src/isa/mod.rs +++ b/src/isa/mod.rs @@ -176,4 +176,8 @@ impl Instruction { let low12 = ((self.word as SignedWord) >> 31) as Word; ((low12 << 12) | (low11 << 11) | (low5 << 5) | (low1 << 1)) as SignedWord } + + pub fn u_imm(&self) -> SignedWord { + (self.word & 0xFFFFF000) as SignedWord + } } diff --git a/src/isa/opcodes.rs b/src/isa/opcodes.rs index 39401cd..8ca715e 100644 --- a/src/isa/opcodes.rs +++ b/src/isa/opcodes.rs @@ -14,6 +14,8 @@ // You should have received a copy of the GNU General Public License // along with rustv. If not, see <http://www.gnu.org/licenses/>. +pub const LUI: u32 = 0x37; +pub const AUIPC: u32 = 0x17; pub const BRANCH: u32 = 0x63; pub const JALR: u32 = 0x67; pub const JAL: u32 = 0x6F; diff --git a/src/simulator.rs b/src/simulator.rs index 006244a..073de67 100644 --- a/src/simulator.rs +++ b/src/simulator.rs @@ -105,6 +105,13 @@ impl<'a> Core<'a> { } match inst.opcode() { + isa::opcodes::LUI => { + self.registers.write_word(inst.rd(), inst.u_imm() as isa::Word) + }, + isa::opcodes::AUIPC => { + let result = (pc as isa::SignedWord) + inst.u_imm(); + self.registers.write_word(inst.rd(), result as isa::Word); + }, isa::opcodes::JALR => { // TODO: assert funct3 is 0 let base = self.registers.read_word(inst.rs1()) |