target/loongarch: Fix LD/ST{LE/GT} instructions get wrong CSR_ERA and…

… CSR_BADV

1.helper_asrtle_d/helper_asrtgt_d need use GETPC() to get PC;
2 LD/ST{LE/GT} need set CSR_BADV = gpr[rj];
3 ASRTLE.D/ASRTGT.D also write CSR_BADV, but this value is random
  and has no reference value.

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230515130042.2719712-1-gaosong@loongson.cn>

target/loongarch/cpu.c

@@ -187,10 +187,10 @@ static void loongarch_cpu_do_interrupt(CPUState *cs)
     case EXCCODE_IPE:
     case EXCCODE_FPD:
     case EXCCODE_FPE:
-    case EXCCODE_BCE:
     case EXCCODE_SXD:
         env->CSR_BADV = env->pc;
         QEMU_FALLTHROUGH;
+    case EXCCODE_BCE:
     case EXCCODE_ADEM:
     case EXCCODE_PIL:
     case EXCCODE_PIS:

target/loongarch/op_helper.c

@@ -49,14 +49,16 @@ target_ulong helper_bitswap(target_ulong v)
 void helper_asrtle_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
 {
     if (rj > rk) {
-        do_raise_exception(env, EXCCODE_BCE, 0);
+        env->CSR_BADV = rj;
+        do_raise_exception(env, EXCCODE_BCE, GETPC());
     }
 }
 
 void helper_asrtgt_d(CPULoongArchState *env, target_ulong rj, target_ulong rk)
 {
     if (rj <= rk) {
-        do_raise_exception(env, EXCCODE_BCE, 0);
+        env->CSR_BADV = rj;
+        do_raise_exception(env, EXCCODE_BCE, GETPC());
     }
 }