From 57694b11d33a3c5dff1de80baf810354c9ddfdda Mon Sep 17 00:00:00 2001
From: Clo91eaf <Clo91eaf@qq.com>
Date: Sat, 8 Jun 2024 01:40:46 +0800
Subject: [PATCH] [difftest] float rf change should be fake?? wip

---
 .../src/difftest/spike/spike_event.rs           | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/difftest/t1-simulator/src/difftest/spike/spike_event.rs b/difftest/t1-simulator/src/difftest/spike/spike_event.rs
index fb1bdde3b..d7d77a993 100644
--- a/difftest/t1-simulator/src/difftest/spike/spike_event.rs
+++ b/difftest/t1-simulator/src/difftest/spike/spike_event.rs
@@ -263,10 +263,9 @@ impl SpikeEvent {
     // xx0100 <- csr
     let reg_write_size = state.get_reg_write_size();
     (0..reg_write_size).for_each(|idx| match idx & 0xf {
-      0b0000 | 0b0001 => {
+      0b0000 => {
         // scalar rf
-        let is_fp = idx & 0b1 != 0;
-        let data = state.get_reg(idx, is_fp);
+        let data = state.get_reg(idx, false);
         if data != self.rd_bits {
           trace!(
             "SpikeRegChange: idx={idx}, change_from={}, change_to={data}",
@@ -276,6 +275,18 @@ impl SpikeEvent {
           self.is_rd_written = true;
         }
       }
+      0b0001 => {
+        let data = state.get_reg(idx, true);
+        if data == self.rd_bits {
+          trace!(
+            "FloatRFChange: idx={idx}, change_from={}, change_to={data}",
+            self.rd_bits
+          );
+          self.rd_bits = data;
+          self.is_rd_written = true;
+        }
+
+      }
       _ => trace!("UnknownRegChange, idx={idx}, spike detect unknown reg change"),
     });