[difftest] update SpikeEvent after func

difftest/spike_interfaces/spike_interfaces.cc

@@ -56,6 +56,13 @@ const char *proc_disassemble(spike_processor_t *proc) {
   return strdup(disasm->disassemble(fetch.insn).c_str());
 }
 
+const char *proc_disassemble_with_pc(spike_processor_t *proc, reg_t pc) {
+  auto mmu = proc->p->get_mmu();
+  auto disasm = proc->p->get_disassembler();
+  auto fetch = mmu->load_insn(pc);
+  return strdup(disasm->disassemble(fetch.insn).c_str());
+}
+
 spike_processor_t *spike_get_proc(spike_t *spike) {
   return new spike_processor_t{spike->s->get_proc()};
 }
@@ -76,7 +83,7 @@ reg_t proc_func(spike_processor_t *proc) {
     fetch = mmu->load_insn(pc);
     res = fetch.func(proc->p, fetch.insn, pc);
   } catch (trap_t &trap) {
-    printf("catch exception\n");
+    //printf("catch exception\n");
     unsigned max_xlen = proc->p->get_const_xlen();
     state_t* state = proc->p->get_state();
     reg_t hsdeleg = (state->prv <= PRV_S) ? state->medeleg->read() : 0;
@@ -148,6 +155,12 @@ reg_t proc_get_insn(spike_processor_t *proc) {
   return fetch.insn.bits();
 }
 
+reg_t proc_get_insn_with_pc(spike_processor_t *proc, reg_t pc) {
+  auto mmu = proc->p->get_mmu();
+  auto fetch = mmu->load_insn(pc);
+  return fetch.insn.bits();
+}
+
 uint8_t proc_get_vreg_data(spike_processor_t *proc, uint32_t vreg_idx,
                            uint32_t vreg_offset) {
   return proc->p->VU.elt<uint8_t>(vreg_idx, vreg_offset);
@@ -167,18 +180,33 @@ uint32_t proc_get_rs1(spike_processor_t *proc) {
   return (uint32_t)fetch.insn.rs1();
 }
 
+uint32_t proc_get_rs1_with_pc(spike_processor_t *proc, reg_t pc) {
+  auto fetch = proc->p->get_mmu()->load_insn(pc);
+  return (uint32_t)fetch.insn.rs1();
+}
+
 uint32_t proc_get_rs2(spike_processor_t *proc) {
   auto pc = proc->p->get_state()->pc;
   auto fetch = proc->p->get_mmu()->load_insn(pc);
   return (uint32_t)fetch.insn.rs2();
 }
 
+uint32_t proc_get_rs2_with_pc(spike_processor_t *proc, reg_t pc) {
+  auto fetch = proc->p->get_mmu()->load_insn(pc);
+  return (uint32_t)fetch.insn.rs2();
+}
+
 uint32_t proc_get_rd(spike_processor_t *proc) {
   auto pc = proc->p->get_state()->pc;
   auto fetch = proc->p->get_mmu()->load_insn(pc);
   return fetch.insn.rd();
 }
 
+uint32_t proc_get_rd_with_pc(spike_processor_t *proc, reg_t pc) {
+  auto fetch = proc->p->get_mmu()->load_insn(pc);
+  return fetch.insn.rd();
+}
+
 uint64_t proc_vu_get_vtype(spike_processor_t *proc) {
   return proc->p->VU.vtype->read();
 }

difftest/spike_interfaces/spike_interfaces_c.h

@@ -17,17 +17,22 @@ void spike_register_callback(void *ffi_target, ffi_callback callback);
 spike_t *spike_new(const char *set, const char *lvl,
                    size_t lane_number);
 const char *proc_disassemble(spike_processor_t *proc);
+const char *proc_disassemble_with_pc(spike_processor_t *proc, reg_t pc);
 void proc_reset(spike_processor_t *proc);
 spike_processor_t *spike_get_proc(spike_t *spike);
 spike_state_t *proc_get_state(spike_processor_t *proc);
 
 uint64_t proc_func(spike_processor_t *proc);
 uint64_t proc_get_insn(spike_processor_t *proc);
+uint64_t proc_get_insn_with_pc(spike_processor_t *proc, reg_t pc);
 uint8_t proc_get_vreg_data(spike_processor_t *proc, uint32_t vreg_idx,
                            uint32_t vreg_offset);
 uint32_t proc_get_rs1(spike_processor_t *proc);
+uint32_t proc_get_rs1_with_pc(spike_processor_t *proc, reg_t pc);
 uint32_t proc_get_rs2(spike_processor_t *proc);
+uint32_t proc_get_rs2_with_pc(spike_processor_t *proc, reg_t pc);
 uint32_t proc_get_rd(spike_processor_t *proc);
+uint32_t proc_get_rd_with_pc(spike_processor_t *proc, reg_t pc); 
 
 uint64_t proc_vu_get_vtype(spike_processor_t *proc);
 uint32_t proc_vu_get_vxrm(spike_processor_t *proc);

rocketemu/driver/src/sim.rs

@@ -43,7 +43,7 @@ pub struct SimulationArgs {
   pub log_level: String,
 
   /// The timeout value
-  #[arg(long, default_value_t = 1_0000)]
+  #[arg(long, default_value_t = 1_00000)]
   pub timeout: u64,
 
   #[cfg(feature = "trace")]

rocketemu/offline/src/difftest.rs

@@ -35,7 +35,7 @@ impl Difftest {
       }
       if se.is_rd_written() && se.rd_idx != 0 {
         let event = self.dut.step()?;
-
+        
         match event {
           JsonEvents::RegWrite { addr, data, cycle } => {
             self.runner.cycle = *cycle;

rocketemu/spike_rs/src/lib.rs

@@ -97,6 +97,12 @@ impl Processor {
     format!("{}", c_str.to_string_lossy())
   }
 
+  pub fn disassemble_with_pc(&self, pc: u64) -> String {
+    let bytes = unsafe { proc_disassemble_with_pc(self.processor, pc) };
+    let c_str = unsafe { CStr::from_ptr(bytes as *mut c_char) };
+    format!("{}", c_str.to_string_lossy())
+  }
+
   pub fn reset(&self) {
     unsafe { proc_reset(self.processor) }
   }
@@ -114,6 +120,10 @@ impl Processor {
     unsafe { proc_get_insn(self.processor) as u32 }
   }
 
+  pub fn get_insn_with_pc(&self, pc: u64) -> u32 {
+    unsafe { proc_get_insn_with_pc(self.processor, pc) as u32 }
+  }
+
   pub fn get_vreg_data(&self, idx: u32, offset: u32) -> u8 {
     unsafe { proc_get_vreg_data(self.processor, idx, offset) }
   }
@@ -122,14 +132,26 @@ impl Processor {
     unsafe { proc_get_rs1(self.processor) }
   }
 
+  pub fn get_rs1_with_pc(&self, pc: u64) -> u32 {
+    unsafe { proc_get_rs1_with_pc(self.processor, pc) }
+  }
+
   pub fn get_rs2(&self) -> u32 {
     unsafe { proc_get_rs2(self.processor) }
   }
 
+  pub fn get_rs2_with_pc(&self, pc: u64) -> u32 {
+    unsafe { proc_get_rs2_with_pc(self.processor, pc) }
+  }
+
   pub fn get_rd(&self) -> u32 {
     unsafe { proc_get_rd(self.processor) }
   }
 
+  pub fn get_rd_with_pc(&self, pc: u64) -> u32 {
+    unsafe { proc_get_rd_with_pc(self.processor, pc) }
+  }
+
   // vu
   pub fn vu_get_vtype(&self) -> u32 {
     unsafe { proc_vu_get_vtype(self.processor) as u32 }
@@ -249,14 +271,19 @@ extern "C" {
   fn spike_get_proc(spike: *mut ()) -> *mut ();
   fn spike_destruct(spike: *mut ());
   fn proc_disassemble(proc: *mut ()) -> *mut c_char;
+  fn proc_disassemble_with_pc(proc: *mut(), pc: u64) -> *mut c_char;
   fn proc_reset(proc: *mut ());
   fn proc_get_state(proc: *mut ()) -> *mut ();
   fn proc_func(proc: *mut ()) -> u64;
   fn proc_get_insn(proc: *mut ()) -> u64;
+  fn proc_get_insn_with_pc(proc: *mut(), pc: u64) -> u64; 
   fn proc_get_vreg_data(proc: *mut (), vreg_idx: u32, vreg_offset: u32) -> u8;
   fn proc_get_rs1(proc: *mut ()) -> u32;
+  fn proc_get_rs1_with_pc(proc: *mut(), pc: u64) -> u32;
   fn proc_get_rs2(proc: *mut ()) -> u32;
+  fn proc_get_rs2_with_pc(proc: *mut(), pc: u64) -> u32;
   fn proc_get_rd(proc: *mut ()) -> u32;
+  fn proc_get_rd_with_pc(proc: *mut(), pc: u64) -> u32;
 
   fn proc_vu_get_vtype(proc: *mut ()) -> u64;
   fn proc_vu_get_vxrm(proc: *mut ()) -> u32;

rocketemu/spike_rs/src/spike_event.rs

@@ -100,7 +100,6 @@ pub struct SpikeEvent {
 }
 
 impl SpikeEvent {
-
   pub fn new_with_pc(pc: u64, do_log_vrf: bool) -> Self {
     SpikeEvent {
       do_log_vrf,
@@ -188,6 +187,29 @@ impl SpikeEvent {
     }
   }
 
+  pub fn fill_event(&mut self, spike: &Spike) {
+    let pc = self.pc;
+    let proc = spike.get_proc();
+    let state = proc.get_state();
+
+    let insn_bits = proc.get_insn_with_pc(pc);
+    let opcode = clip(insn_bits, 0, 6);
+    let width = clip(insn_bits, 12, 14);
+
+    let is_rs_fp = opcode == 0b1010111 && width == 0b101/* OPFVF */;
+
+    let rs1 = proc.get_rs1_with_pc(pc);
+    let rs2 = proc.get_rs2_with_pc(pc);
+
+    self.disasm = proc.disassemble_with_pc(pc);
+    self.inst_bits = insn_bits;
+    self.rs1 = rs1;
+    self.rs2 = rs2;
+    self.rs1_bits = state.get_reg(rs1, is_rs_fp);
+    self.rs2_bits = state.get_reg(rs2, is_rs_fp);
+    self.rd_idx = proc.get_rd_with_pc(pc);
+  }
+
   pub fn opcode(&self) -> u32 {
     clip(self.inst_bits, 0, 6)
   }

rocketemu/test_common/src/spike_runner.rs

@@ -78,15 +78,20 @@ impl SpikeRunner {
     let state = proc.get_state();
 
     state.set_mcycle((self.cycle + self.spike_cycle) as usize);
-
+    
     let mut event = SpikeEvent::new_with_pc(state.get_pc(), self.do_log_vrf);
-    state.clear();
+    //state.clear();
+
+    let new_pc = proc.func();
+
+    // fill the SpikeEvent
+    //event.fill_event(spike);
 
     // inst is scalar
     debug!("SpikeStep: spike run scalar insn ({})", event.describe_insn());
-    let new_pc = proc.func();
-    event.log_mem_write(spike).unwrap();
-    event.log_reg_write(spike).unwrap();
+
+    //event.log_mem_write(spike).unwrap();
+    //event.log_reg_write(spike).unwrap();
 
     state.handle_pc(new_pc).unwrap();