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Update some println to panic, fix RISCV_OP_M_MULH (line 270), add write_memory structure

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This commit is contained in:
Quentin Legot 2023-01-16 19:12:20 +01:00
parent c4aede5371
commit 547abd001b
1 changed files with 44 additions and 13 deletions
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51
src/simulator/machine.rs
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@ -63,6 +63,19 @@ impl Machine {
ret ret
} }
/// Write to the main memory of the machine
///
/// **machine** contains the memory
/// **size** the number of bytes to write (1, 2, 4 or 8)
/// **address** the address to write to
/// **value** data to be written
pub fn write_memory(machine: &mut Machine, size: i32, address: usize, value: i64) {
if ![1, 2, 3, 4].contains(&size) {
panic!("ERROR write_memory: WRONG `size` PARAMETER ({}), must be 1, 2, 4 or 8", size)
}
todo!("Write memory not implemented yet");
}
/// Execute the instructions table of a machine putted in param /// Execute the instructions table of a machine putted in param
/// ///
/// ### Parameters /// ### Parameters
@ -154,7 +167,7 @@ impl Machine {
} }
}, },
_ => { _ => {
println!("In BR switch case, this should never happen... Instr was {}", inst.value); panic!("In BR switch case, this should never happen... Instr was {}", inst.value);
} }
} }
}, },
@ -187,13 +200,31 @@ impl Machine {
machine.int_reg[inst.rd as usize] = Self::read_memory(machine, 4, (inst.rs1 as i16 + inst.imm12_I_signed) as usize) as i64; machine.int_reg[inst.rd as usize] = Self::read_memory(machine, 4, (inst.rs1 as i16 + inst.imm12_I_signed) as usize) as i64;
}, },
_ => { _ => {
println!("In LD switch case, this should never happen... Instr was {}", inst.value); panic!("In LD switch case, this should never happen... Instr was {}", inst.value);
} }
} }
}, },
//TODO store instructions //TODO store instructions
RISCV_ST => {
match inst.funct3 {
RISCV_ST_STB => {
todo!("Write memory here");
},
RISCV_ST_STH => {
todo!("Write memory here");
},
RISCV_ST_STW => {
todo!("Write memory here");
},
RISCV_ST_STD => {
todo!("Write memory here");
},
_ => {
panic!("In ST switch case, this should never happen... Instr was {}", inst.value);
}
}
}
//****************************************************************************************** //******************************************************************************************
// Treatment for: OPI INSTRUCTIONS // Treatment for: OPI INSTRUCTIONS
RISCV_OPI => { RISCV_OPI => {
@ -223,7 +254,7 @@ impl Machine {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] >> inst.shamt; machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] >> inst.shamt;
} }
} }
_ => { println!("{} inconnu", inst.funct3); } _ => { panic!("{} inconnu", inst.funct3); }
} }
}, },
@ -236,7 +267,7 @@ impl Machine {
}, },
RISCV_OP_M_MULH => { RISCV_OP_M_MULH => {
long_result = (machine.int_reg[inst.rs1 as usize] * machine.int_reg[inst.rs2 as usize]) as i128; long_result = (machine.int_reg[inst.rs1 as usize] * machine.int_reg[inst.rs2 as usize]) as i128;
machine.int_reg[inst.rd as usize] = ((long_result >> 64) & 0xffffffffffffffff) as i64;
}, },
RISCV_OP_M_MULHSU => { RISCV_OP_M_MULHSU => {
unsigned_reg2 = machine.int_reg[inst.rs2 as usize] as u64; unsigned_reg2 = machine.int_reg[inst.rs2 as usize] as u64;
@ -258,7 +289,7 @@ impl Machine {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] / machine.int_reg[inst.rs2 as usize]; machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] / machine.int_reg[inst.rs2 as usize];
} }
_ => { _ => {
println!("RISCV_OP : funct7 = 1 (Multiplication) :: Error\n"); panic!("RISCV_OP : funct7 = 1 (Multiplication) :: Error\n");
} }
} }
} else { } else {
@ -303,7 +334,7 @@ impl Machine {
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] & machine.int_reg[inst.rs2 as usize]; machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] & machine.int_reg[inst.rs2 as usize];
}, },
_ => { _ => {
println!("RISCV_OP undefined case\n"); panic!("RISCV_OP undefined case\n");
} }
}//LA }//LA
} }
@ -335,7 +366,7 @@ impl Machine {
machine.int_reg[inst.rd as usize] = local_data_a_unsigned % local_data_b_unsigned; machine.int_reg[inst.rd as usize] = local_data_a_unsigned % local_data_b_unsigned;
}, },
_ => { _ => {
println!("this instruction ({}) doesn't exists", inst.value); panic!("this instruction ({}) doesn't exists", inst.value);
} }
} }
} else { } else {
@ -362,12 +393,12 @@ impl Machine {
} }
}, },
_ => { _ => {
println!("this instruction ({}) doesn't exists", inst.value); panic!("this instruction ({}) doesn't exists", inst.value);
} }
} }
} }
} }
_ => { println!("{} opcode non géré", inst.opcode)}, _ => { panic!("{} opcode non géré", inst.opcode)},
} }
machine.pc += 4; machine.pc += 4;