riscv: move CSR test macro

Moves the CSR test helper macro to `register::macros` module for re-use.

The test helper macro can be expanded as needed, but is not intended for
external use.

Author: rmsyn

riscv/src/register/macros.rs

@@ -1059,3 +1059,19 @@ macro_rules! write_only_csr_field {
         }
     };
 }
+
+#[cfg(test)]
+#[macro_export]
+macro_rules! test_csr_field {
+    ($reg:ident, $field:ident) => {{
+        $crate::paste! {
+            assert!(!$reg.$field());
+
+            $reg.[<set_ $field>](true);
+            assert!($reg.$field());
+
+            $reg.[<set_ $field>](false);
+            assert!(!$reg.$field());
+        }
+    }};
+}

riscv/src/register/medeleg.rs

@@ -131,36 +131,22 @@ set_clear_csr!(
 mod tests {
     use super::*;
 
-    macro_rules! test_field {
-        ($reg:ident, $field:ident) => {{
-            $crate::paste! {
-                assert!(!$reg.$field());
-
-                $reg.[<set_ $field>](true);
-                assert!($reg.$field());
-
-                $reg.[<set_ $field>](false);
-                assert!(!$reg.$field());
-            }
-        }};
-    }
-
     #[test]
     fn test_medeleg() {
         let mut m = Medeleg::from_bits(0);
 
-        test_field!(m, instruction_misaligned);
-        test_field!(m, instruction_fault);
-        test_field!(m, illegal_instruction);
-        test_field!(m, breakpoint);
-        test_field!(m, load_misaligned);
-        test_field!(m, load_fault);
-        test_field!(m, store_misaligned);
-        test_field!(m, store_fault);
-        test_field!(m, user_env_call);
-        test_field!(m, supervisor_env_call);
-        test_field!(m, instruction_page_fault);
-        test_field!(m, load_page_fault);
-        test_field!(m, store_page_fault);
+        test_csr_field!(m, instruction_misaligned);
+        test_csr_field!(m, instruction_fault);
+        test_csr_field!(m, illegal_instruction);
+        test_csr_field!(m, breakpoint);
+        test_csr_field!(m, load_misaligned);
+        test_csr_field!(m, load_fault);
+        test_csr_field!(m, store_misaligned);
+        test_csr_field!(m, store_fault);
+        test_csr_field!(m, user_env_call);
+        test_csr_field!(m, supervisor_env_call);
+        test_csr_field!(m, instruction_page_fault);
+        test_csr_field!(m, load_page_fault);
+        test_csr_field!(m, store_page_fault);
     }
 }