is_la64 should be wired to false on LA32 build.
VA32 CSR check shouldn't be performed in LA32 mode.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 target/loongarch/cpu.h | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index 4f542a3376831141d012f177dc46a0e928afc85c..a2d416b6634b7f6787c93eac2b777a2f6c71bebf 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -438,18 +438,26 @@ struct LoongArchCPUClass {
 
 static inline bool is_la64(CPULoongArchState *env)
 {
+#ifdef TARGET_LOONGARCH64
     return FIELD_EX32(env->cpucfg[1], CPUCFG1, ARCH) == CPUCFG1_ARCH_LA64;
+#endif
+    return false;
 }
 
 static inline bool is_va32(CPULoongArchState *env)
 {
     /* VA32 if !LA64 or VA32L[1-3] */
-    bool va32 = !is_la64(env);
-    uint64_t plv = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
-    if (plv >= 1 && (FIELD_EX64(env->CSR_MISC, CSR_MISC, VA32) & (1 << plv))) {
-        va32 = true;
+    if (is_la64(env)) {
+        uint64_t plv = FIELD_EX64(env->CSR_CRMD, CSR_CRMD, PLV);
+
+        if (plv >= 1 &&
+            extract64(FIELD_EX64(env->CSR_MISC, CSR_MISC, VA32), plv, 1)) {
+            return true;
+        }
+        return false;
     }
-    return va32;
+
+    return true;
 }
 
 static inline void set_pc(CPULoongArchState *env, uint64_t value)

-- 
2.43.0