quentinlegot/burritos
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update registers access on RISCV_OP

Browse Source
This commit is contained in:
Quentin Legot 2023-02-01 17:04:10 +01:00
parent 069a8e5741
commit 67ebff7ad0
1 changed files with 13 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/simulator/machine.rs
View File

@ -295,9 +295,9 @@ impl Machine {
},
RISCV_OPI_SRI => {
if inst.funct7_smaller == RISCV_OPI_SRI_SRLI {
machine.int_reg[inst.rd as usize] = (machine.int_reg[inst.rs1 as usize] >> inst.shamt) & machine.shiftmask[inst.shamt as usize] as i64;
machine.int_reg.set_reg(inst.rd as usize, (machine.int_reg.get_reg(inst.rs1 as usize) >> inst.shamt) & machine.shiftmask[inst.shamt as usize] as i64);
} else { // SRAI
machine.int_reg[inst.rd as usize] = machine.int_reg[inst.rs1 as usize] >> inst.shamt;
machine.int_reg.set_reg(inst.rd as usize, machine.int_reg.get_reg(inst.rs1 as usize) >> inst.shamt);
}
}
_ => { panic!("In OPI switch case, this should never happen... Instr was %x\n {}", inst.value); }
@ -308,17 +308,17 @@ impl Machine {
if inst.funct7 == 1 {
match inst.funct3 {
RISCV_OP_M_MUL => {
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 & 0xffffffffffffffff) as i64;
long_result = (machine.int_reg.get_reg(inst.rs1 as usize) * machine.int_reg.get_reg(inst.rs2 as usize)) as i128;
machine.int_reg.set_reg(inst.rd as usize, (long_result & 0xffffffffffffffff) as i64);
},
RISCV_OP_M_MULH => {
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;
long_result = (machine.int_reg.get_reg(inst.rs1 as usize) * machine.int_reg.get_reg(inst.rs2 as usize)) as i128;
machine.int_reg.set_reg(inst.rd as usize, ((long_result >> 64) & 0xffffffffffffffff) as i64);
},
RISCV_OP_M_MULHSU => {
unsigned_reg2 = machine.int_reg[inst.rs2 as usize] as u64;
long_result = (machine.int_reg[inst.rs1 as usize] as u64 * unsigned_reg2) as i128;
machine.int_reg[inst.rd as usize] = ((long_result >> 64) & 0xffffffffffffffff) as i64;
unsigned_reg2 = machine.int_reg.get_reg(inst.rs2 as usize) as u64;
long_result = (machine.int_reg.get_reg(inst.rs1 as usize) as u64 * unsigned_reg2) as i128;
machine.int_reg.set_reg(inst.rd as usize, ((long_result >> 64) & 0xffffffffffffffff) as i64);
},
// VOIR CE QUE FAIT EXACTEMENT CE TRUC , PK on converve
/*
@ -326,13 +326,13 @@ impl Machine {
* WHAT DA HECK
*/
RISCV_OP_M_MULHU => {
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;
long_result = (unsigned_reg1 * unsigned_reg2) as i128;
machine.int_reg[inst.rd as usize] = ((long_result >> 64) & 0xffffffffffffffff) as i64;
machine.int_reg.set_reg(inst.rd as usize, ((long_result >> 64) & 0xffffffffffffffff) as i64);
},
RISCV_OP_M_DIV => {
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 : funct7 = 1 (Multiplication) :: Error\n");