lm32: fix exception handling

Global interrupt enable bit is already saved within the exception handler
helper routine. Thus remove extra code in translation routines.

Additionally, debug exceptions has always DEBA as base address.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

2 files changed, 1 insertions, 31 deletions

diff --git a/target-lm32/helper.c b/target-lm32/helper.c
index 318e2cf..4f3e7e0 100644
--- a/target-lm32/helper.c
+++ b/target-lm32/helper.c
@@ -76,11 +76,7 @@ void do_interrupt(CPUState *env)
         env->regs[R_BA] = env->pc;
         env->ie |= (env->ie & IE_IE) ? IE_BIE : 0;
         env->ie &= ~IE_IE;
-        if (env->dc & DC_RE) {
-            env->pc = env->deba + (env->exception_index * 32);
-        } else {
-            env->pc = env->eba + (env->exception_index * 32);
-        }
+        env->pc = env->deba + (env->exception_index * 32);
         log_cpu_state_mask(CPU_LOG_INT, env, 0);
         break;
     default:
diff --git a/target-lm32/translate.c b/target-lm32/translate.c
index 51b4f5a..bcd52fe 100644
--- a/target-lm32/translate.c
+++ b/target-lm32/translate.c
@@ -598,36 +598,10 @@ static void dec_scall(DisasContext *dc)
     t0 = tcg_temp_new();
     l1 = gen_new_label();
 
-    /* save IE.IE */
-    tcg_gen_andi_tl(t0, cpu_ie, IE_IE);
-
-    /* IE.IE = 0 */
-    tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_IE);
-
     if (dc->imm5 == 7) {
-        /* IE.EIE = IE.IE */
-        tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_EIE);
-        tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_IE, l1);
-        tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_EIE);
-        gen_set_label(l1);
-
-        /* gpr[ea] = PC */
-        tcg_gen_movi_tl(cpu_R[R_EA], dc->pc);
-        tcg_temp_free(t0);
-
         tcg_gen_movi_tl(cpu_pc, dc->pc);
         t_gen_raise_exception(dc, EXCP_SYSTEMCALL);
     } else {
-        /* IE.BIE = IE.IE */
-        tcg_gen_ori_tl(cpu_ie, cpu_ie, IE_BIE);
-        tcg_gen_brcondi_tl(TCG_COND_EQ, t0, IE_IE, l1);
-        tcg_gen_andi_tl(cpu_ie, cpu_ie, ~IE_BIE);
-        gen_set_label(l1);
-
-        /* gpr[ba] = PC */
-        tcg_gen_movi_tl(cpu_R[R_BA], dc->pc);
-        tcg_temp_free(t0);
-
         tcg_gen_movi_tl(cpu_pc, dc->pc);
         t_gen_raise_exception(dc, EXCP_BREAKPOINT);
     }