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pc - 8 in one instruction

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This commit is contained in:
Baptiste 2023-02-08 15:05:02 +01:00
parent eab9d1c749
commit 8b84dee271
1 changed files with 8 additions and 8 deletions
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16
src/simulator/machine.rs
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@ -185,11 +185,11 @@ impl Machine {
machine.int_reg.set_reg(inst.rd as usize, inst.imm31_12 as i64); machine.int_reg.set_reg(inst.rd as usize, inst.imm31_12 as i64);
}, },
RISCV_AUIPC => { RISCV_AUIPC => {
machine.int_reg.set_reg(inst.rd as usize,machine.pc as i64 - 4 + inst.imm31_12 as i64); machine.int_reg.set_reg(inst.rd as usize,machine.pc as i64 - 8 + inst.imm31_12 as i64);
}, },
RISCV_JAL => { RISCV_JAL => {
machine.int_reg.set_reg(inst.rd as usize, machine.pc as i64); machine.int_reg.set_reg(inst.rd as usize, machine.pc as i64);
machine.pc += inst.imm21_1_signed as u64 - 4; machine.pc += inst.imm21_1_signed as u64 - 8;
}, },
RISCV_JALR => { RISCV_JALR => {
let tmp = machine.pc; let tmp = machine.pc;
@ -203,32 +203,32 @@ impl Machine {
match inst.funct3 { match inst.funct3 {
RISCV_BR_BEQ => { RISCV_BR_BEQ => {
if machine.int_reg.get_reg(inst.rs1 as usize) == machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) == machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
RISCV_BR_BNE => { RISCV_BR_BNE => {
if machine.int_reg.get_reg(inst.rs1 as usize) != machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) != machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
RISCV_BR_BLT => { RISCV_BR_BLT => {
if machine.int_reg.get_reg(inst.rs1 as usize) < machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) < machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
RISCV_BR_BGE => { RISCV_BR_BGE => {
if machine.int_reg.get_reg(inst.rs1 as usize) >= machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) >= machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
RISCV_BR_BLTU => { RISCV_BR_BLTU => {
if machine.int_reg.get_reg(inst.rs1 as usize) < machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) < machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
RISCV_BR_BGEU => { RISCV_BR_BGEU => {
if machine.int_reg.get_reg(inst.rs1 as usize) >= machine.int_reg.get_reg(inst.rs2 as usize) { if machine.int_reg.get_reg(inst.rs1 as usize) >= machine.int_reg.get_reg(inst.rs2 as usize) {
machine.pc += inst.imm13_signed as u64 - 4; machine.pc += inst.imm13_signed as u64 - 8;
} }
}, },
_ => { _ => {