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Implement ADD

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taitep
2025-12-22 19:19:19 +01:00
parent e00103375d
commit ff161a69e6
2 changed files with 15 additions and 0 deletions
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5
src/instructions.rs
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@@ -13,6 +13,11 @@ use crate::{
pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<InstructionResult> { pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<InstructionResult> {
match instr.opcode_noncompressed() { match instr.opcode_noncompressed() {
0b01100 => match (instr.funct7(), instr.funct3()) {
// OP
(0b0000000, 0b000) => Some(rvi::add(core, instr)),
_ => None,
},
0b00100 => match instr.funct3() { 0b00100 => match instr.funct3() {
// OP_IMM // OP_IMM
0b000 => Some(rvi::addi(core, instr)), 0b000 => Some(rvi::addi(core, instr)),

10
src/instructions/rvi.rs
View File

@@ -11,6 +11,16 @@ use crate::{
mem::PageNum, mem::PageNum,
}; };
pub fn add(core: &mut Core, instr: Instruction) -> InstructionResult {
core.reg_write(
instr.rd(),
core.reg_read(instr.rs1())
.wrapping_add(core.reg_read(instr.rs2())),
);
core.advance_pc();
InstructionResult::Normal
}
pub fn addi(core: &mut Core, instr: Instruction) -> InstructionResult { pub fn addi(core: &mut Core, instr: Instruction) -> InstructionResult {
core.reg_write( core.reg_write(
instr.rd(), instr.rd(),