CRIS: Translator updates.

* RFN (Return From NMI) insn.
* Avoid unnecessary T0 transfers.
* Dont do tcg related init more than once.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4717 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-cris/translate.c b/target-cris/translate.c
index 3affd1c..cd0c2e1 100644 (file)
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -735,7 +735,7 @@ static void cris_evaluate_flags(DisasContext *dc)
                        else
                                tcg_gen_andi_tl(cpu_PR[PR_CCS], 
                                                cpu_PR[PR_CCS], ~X_FLAG);
-        }
+               }
 
                dc->flags_uptodate = 1;
        }
@@ -1530,7 +1530,6 @@ static unsigned int dec_btstq(DisasContext *dc)
 
        cris_cc_mask(dc, CC_MASK_NZ);
 
-       t_gen_mov_TN_reg(cpu_T[0], dc->op2);
        cris_alu(dc, CC_OP_BTST,
                    cpu_T[0], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
        cris_update_cc_op(dc, CC_OP_FLAGS, 4);
@@ -1968,11 +1967,10 @@ static unsigned int dec_movs_r(DisasContext *dc)
                    dc->op1, dc->op2));
 
        cris_cc_mask(dc, CC_MASK_NZ);
-       t_gen_mov_TN_reg(cpu_T[0], dc->op1);
        /* Size can only be qi or hi.  */
        t_gen_sext(cpu_T[1], cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_MOVE,
-                   cpu_R[dc->op2], cpu_T[0], cpu_T[1], 4);
+                   cpu_R[dc->op2], cpu_R[dc->op1], cpu_T[1], 4);
        return 2;
 }
 
@@ -2788,7 +2786,9 @@ static unsigned int dec_rfe_etc(DisasContext *dc)
                        break;
                case 5:
                        /* rfn.  */
-                       BUG();
+                       cris_evaluate_flags(dc);
+                       tcg_gen_helper_0_0(helper_rfn);
+                       dc->is_jmp = DISAS_UPDATE;
                        break;
                case 6:
                        /* break.  */
@@ -3271,12 +3271,20 @@ void cpu_dump_state (CPUState *env, FILE *f,
 CPUCRISState *cpu_cris_init (const char *cpu_model)
 {
        CPUCRISState *env;
+       static int tcg_initialized = 0;
        int i;
 
        env = qemu_mallocz(sizeof(CPUCRISState));
        if (!env)
                return NULL;
+
        cpu_exec_init(env);
+       cpu_reset(env);
+
+       if (tcg_initialized)
+               return env;
+
+       tcg_initialized = 1;
 
        cpu_env = tcg_global_reg_new(TCG_TYPE_PTR, TCG_AREG0, "env");
 #if TARGET_LONG_BITS > HOST_LONG_BITS
@@ -3337,6 +3345,7 @@ CPUCRISState *cpu_cris_init (const char *cpu_model)
        TCG_HELPER(helper_movl_sreg_reg);
        TCG_HELPER(helper_movl_reg_sreg);
        TCG_HELPER(helper_rfe);
+       TCG_HELPER(helper_rfn);
 
        TCG_HELPER(helper_evaluate_flags_muls);
        TCG_HELPER(helper_evaluate_flags_mulu);
@@ -3346,8 +3355,6 @@ CPUCRISState *cpu_cris_init (const char *cpu_model)
        TCG_HELPER(helper_evaluate_flags_move_2);
        TCG_HELPER(helper_evaluate_flags);
        TCG_HELPER(helper_top_evaluate_flags);
-
-       cpu_reset(env);
        return env;
 }