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OPW & OP for funct7 == -1

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This commit is contained in:
Baptiste 2023-02-01 17:02:19 +01:00
parent 069a8e5741
commit 1efcd73ae7
1 changed files with 30 additions and 30 deletions
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60
src/simulator/machine.rs
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@ -342,42 +342,42 @@ impl Machine {
match inst.funct3 {
RISCV_OP_ADD => {
if inst.funct7 == RISCV_OP_ADD_ADD {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] + machine.int_reg[inst.rs2 as usize];
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) + machine.int_reg.get_reg(inst.rs2 as usize));
} else {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] - machine.int_reg[inst.rs2 as usize];
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) - machine.int_reg.get_reg(inst.rs2 as usize));
}
},
RISCV_OP_SLL => {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] << (machine.int_reg[inst.rs2 as usize] & 0x3f);
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) << (machine.int_reg.get_reg(inst.rs2 as usize) & 0x3f));
},
RISCV_OP_SLT => {
if machine.int_reg[inst.rs1 as usize] < machine.int_reg[inst.rs2 as usize] {
machine.int_reg[inst.rd as usize] = 1;
if machine.int_reg.get_reg(inst.rs1 as usize) < machine.int_reg.get_reg(inst.rs2 as usize) {
machine.int_reg.set_reg(inst.rd as usize, 1);
} else {
machine.int_reg[inst.rd as usize] = 0;
machine.int_reg.set_reg(inst.rd as usize, 0);
}
},
RISCV_OP_SLTU => {
unsigned_reg1 = machine.int_reg[inst.rs1 as usize] as u64;
unsigned_reg2 = machine.int_reg[inst.rs2 as usize] as u64;
unsigned_reg1 = machine.int_reg.get_reg(inst.rs1 as usize) as u64;
unsigned_reg2 = machine.int_reg.get_reg(inst.rs2 as usize) as u64;
if unsigned_reg1 < unsigned_reg2 {
machine.int_reg[inst.rd as usize] = 1;
machine.int_reg.set_reg(inst.rd as usize, 1);
} else {
machine.int_reg[inst.rd as usize] = 0;
machine.int_reg.set_reg(inst.rd as usize, 0);
}
},
RISCV_OP_XOR => {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] ^ machine.int_reg[inst.rs2 as usize];
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) ^ machine.int_reg.get_reg(inst.rs2 as usize));
},
RISCV_OP_SR => {
// RISCV_OP_SR_SRL inaccessible
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] >> (machine.int_reg[inst.rs2 as usize] & 0x3f);
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) >> machine.int_reg.get_reg(inst.rs2 as usize));
},
RISCV_OP_OR => {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] | machine.int_reg[inst.rs2 as usize];
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) | machine.int_reg.get_reg(inst.rs2 as usize));
},
RISCV_OP_AND => {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] & machine.int_reg[inst.rs2 as usize];
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) & machine.int_reg.get_reg(inst.rs2 as usize));
},
_ => {
panic!("RISCV_OP undefined case\n");
@ -389,53 +389,53 @@ impl Machine {
// Treatment for: OPW INSTRUCTIONS
RISCV_OPW => {
if inst.funct7 == 1 {
let local_data_a = machine.int_reg[inst.rs1 as usize] & 0xffffffff;
let local_data_b = machine.int_reg[inst.rs2 as usize] & 0xffffffff;
let local_data_a_unsigned = machine.int_reg[inst.rs1 as usize] & 0xffffffff;
let local_data_b_unsigned = machine.int_reg[inst.rs2 as usize] & 0xffffffff;
let local_data_a = machine.int_reg.get_reg(inst.rs1 as usize) & 0xffffffff;
let local_data_b = machine.int_reg.get_reg(inst.rs2 as usize) & 0xffffffff;
let local_data_a_unsigned = machine.int_reg.get_reg(inst.rs1 as usize) & 0xffffffff;
let local_data_b_unsigned = machine.int_reg.get_reg(inst.rs2 as usize) & 0xffffffff;
// Match case for multiplication operations (in standard extension RV32M)
match inst.funct3 {
RISCV_OPW_M_MULW => {
machine.int_reg[inst.rd as usize] = local_data_a * local_data_b;
machine.int_reg.set_reg(inst.rd as usize, local_data_a * local_data_b);
},
RISCV_OPW_M_DIVW => {
machine.int_reg[inst.rd as usize] = local_data_a / local_data_b;
machine.int_reg.set_reg(inst.rd as usize, local_data_a / local_data_b);
},
RISCV_OPW_M_DIVUW => {
machine.int_reg[inst.rd as usize] = local_data_a_unsigned / local_data_b_unsigned;
machine.int_reg.set_reg(inst.rd as usize, local_data_a_unsigned / local_data_b_unsigned);
},
RISCV_OPW_M_REMW => {
machine.int_reg[inst.rd as usize] = local_data_a % local_data_b;
machine.int_reg.set_reg(inst.rd as usize, local_data_a % local_data_b);
},
RISCV_OPW_M_REMUW => {
machine.int_reg[inst.rd as usize] = local_data_a_unsigned % local_data_b_unsigned;
machine.int_reg.set_reg(inst.rd as usize, local_data_a_unsigned % local_data_b_unsigned);
},
_ => {
panic!("this instruction ({}) doesn't exists", inst.value);
}
}
} else {
let local_dataa = machine.int_reg[inst.rs1 as usize] & 0xffffffff;
let local_datab = machine.int_reg[inst.rs2 as usize] & 0xffffffff;
let local_dataa = machine.int_reg.get_reg(inst.rs1 as usize) & 0xffffffff;
let local_datab = machine.int_reg.get_reg(inst.rs2 as usize) & 0xffffffff;
// Match case for base OP operation
match inst.funct3 {
RISCV_OPW_ADDSUBW => {
if inst.funct7 == RISCV_OPW_ADDSUBW_ADDW {
machine.int_reg[inst.rd as usize] = local_dataa + local_datab;
machine.int_reg.set_reg(inst.rd as usize, local_dataa + local_datab);
} else { // SUBW
machine.int_reg[inst.rd as usize] = local_dataa - local_datab;
machine.int_reg.set_reg(inst.rd as usize, local_dataa - local_datab);
}
},
RISCV_OPW_SLLW => {
machine.int_reg[inst.rd as usize] = local_dataa << (local_datab & 0x1f);
machine.int_reg.set_reg(inst.rd as usize, local_dataa << (local_datab & 0x1f));
},
RISCV_OPW_SRW => {
if inst.funct7 == RISCV_OPW_SRW_SRLW {
machine.int_reg[inst.rd as usize] = local_dataa >> (local_datab & 0x1f) & machine.shiftmask[32 + local_datab as usize] as i64;
machine.int_reg.set_reg(inst.rd as usize, local_dataa >> (local_datab & 0x1f) & machine.shiftmask[32 + local_datab as usize] as i64);
} else { // SRAW
machine.int_reg[inst.rd as usize] = local_dataa >> (local_datab & 0x1f);
machine.int_reg.set_reg(inst.rd as usize, local_dataa >> (local_datab & 0x1f));
}
},
_ => {