nemu: try difftest

.gitea/workflows/abstract-machine-build.yml

@@ -10,9 +10,8 @@ jobs:
           name: ysyx
           signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
       - uses: actions/checkout@v4
-        sparse-checkout: |
-          flake.nix
-          abstract-machine
+        with:
+          submodules: true
       - name: Build abstract-machine
         run: |
           nix build .#abstract-machine

nemu/default.nix

@@ -1,7 +1,8 @@
 { pkgs,
   lib,
   stdenv,
-  am-kernels
+  am-kernels,
+  dtc
 }:
 
 stdenv.mkDerivation rec {
@@ -15,6 +16,7 @@ stdenv.mkDerivation rec {
     pkg-config
     flex
     bison
+    dtc
   ];
 
   buildInputs = with pkgs; [

nemu/src/isa/riscv32/difftest/dut.c

@@ -18,7 +18,10 @@
 #include "../local-include/reg.h"
 
 bool isa_difftest_checkregs(CPU_state *ref_r, vaddr_t pc) {
-  return false;
+  for(int i = 0; i < MUXDEF(CONFIG_RVE, 16, 32); i++) {
+    if(!difftest_check_reg(reg_name(i), pc, ref_r->gpr[i], gpr(i))) return false;
+  }
+  return true;
 }
 
 void isa_difftest_attach() {