target/arm: Split out gen_rebuild_hflags

For aa32, the function has a parameter to use the new el.
For aa64, that never happens.
Use tcg_constant_i32 while we're at it.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/arm/translate-a64.c

@@ -341,6 +341,11 @@ static void a64_free_cc(DisasCompare64 *c64)
     tcg_temp_free_i64(c64->value);
 }
 
+static void gen_rebuild_hflags(DisasContext *s)
+{
+    gen_helper_rebuild_hflags_a64(cpu_env, tcg_constant_i32(s->current_el));
+}
+
 static void gen_exception_internal(int excp)
 {
     TCGv_i32 tcg_excp = tcg_const_i32(excp);
@@ -1667,9 +1672,7 @@ static void handle_msr_i(DisasContext *s, uint32_t insn,
         } else {
             clear_pstate_bits(PSTATE_UAO);
         }
-        t1 = tcg_const_i32(s->current_el);
+        gen_rebuild_hflags(s);
-        gen_helper_rebuild_hflags_a64(cpu_env, t1);
-        tcg_temp_free_i32(t1);
         break;
 
     case 0x04: /* PAN */
@@ -1681,9 +1684,7 @@ static void handle_msr_i(DisasContext *s, uint32_t insn,
         } else {
             clear_pstate_bits(PSTATE_PAN);
         }
-        t1 = tcg_const_i32(s->current_el);
+        gen_rebuild_hflags(s);
-        gen_helper_rebuild_hflags_a64(cpu_env, t1);
-        tcg_temp_free_i32(t1);
         break;
 
     case 0x05: /* SPSel */
@@ -1741,9 +1742,7 @@ static void handle_msr_i(DisasContext *s, uint32_t insn,
             } else {
                 clear_pstate_bits(PSTATE_TCO);
             }
-            t1 = tcg_const_i32(s->current_el);
+            gen_rebuild_hflags(s);
-            gen_helper_rebuild_hflags_a64(cpu_env, t1);
-            tcg_temp_free_i32(t1);
             /* Many factors, including TCO, go into MTE_ACTIVE. */
             s->base.is_jmp = DISAS_UPDATE_NOCHAIN;
         } else if (dc_isar_feature(aa64_mte_insn_reg, s)) {
@@ -1990,9 +1989,7 @@ static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
          * A write to any coprocessor regiser that ends a TB
          * must rebuild the hflags for the next TB.
          */
-        TCGv_i32 tcg_el = tcg_const_i32(s->current_el);
+        gen_rebuild_hflags(s);
-        gen_helper_rebuild_hflags_a64(cpu_env, tcg_el);
-        tcg_temp_free_i32(tcg_el);
         /*
          * We default to ending the TB on a coprocessor register write,
          * but allow this to be suppressed by the register definition

target/arm/translate.c

@@ -351,6 +351,26 @@ void gen_set_cpsr(TCGv_i32 var, uint32_t mask)
     tcg_temp_free_i32(tmp_mask);
 }
 
+static void gen_rebuild_hflags(DisasContext *s, bool new_el)
+{
+    bool m_profile = arm_dc_feature(s, ARM_FEATURE_M);
+
+    if (new_el) {
+        if (m_profile) {
+            gen_helper_rebuild_hflags_m32_newel(cpu_env);
+        } else {
+            gen_helper_rebuild_hflags_a32_newel(cpu_env);
+        }
+    } else {
+        TCGv_i32 tcg_el = tcg_constant_i32(s->current_el);
+        if (m_profile) {
+            gen_helper_rebuild_hflags_m32(cpu_env, tcg_el);
+        } else {
+            gen_helper_rebuild_hflags_a32(cpu_env, tcg_el);
+        }
+    }
+}
+
 static void gen_exception_internal(int excp)
 {
     TCGv_i32 tcg_excp = tcg_const_i32(excp);
@@ -4885,17 +4905,7 @@ static void do_coproc_insn(DisasContext *s, int cpnum, int is64,
              * A write to any coprocessor register that ends a TB
              * must rebuild the hflags for the next TB.
              */
-            TCGv_i32 tcg_el = tcg_const_i32(s->current_el);
+            gen_rebuild_hflags(s, ri->type & ARM_CP_NEWEL);
-            if (arm_dc_feature(s, ARM_FEATURE_M)) {
-                gen_helper_rebuild_hflags_m32(cpu_env, tcg_el);
-            } else {
-                if (ri->type & ARM_CP_NEWEL) {
-                    gen_helper_rebuild_hflags_a32_newel(cpu_env);
-                } else {
-                    gen_helper_rebuild_hflags_a32(cpu_env, tcg_el);
-                }
-            }
-            tcg_temp_free_i32(tcg_el);
             /*
              * We default to ending the TB on a coprocessor register write,
              * but allow this to be suppressed by the register definition
@@ -6445,7 +6455,7 @@ static bool trans_MSR_v7m(DisasContext *s, arg_MSR_v7m *a)
     tcg_temp_free_i32(addr);
     tcg_temp_free_i32(reg);
     /* If we wrote to CONTROL, the EL might have changed */
-    gen_helper_rebuild_hflags_m32_newel(cpu_env);
+    gen_rebuild_hflags(s, true);
     gen_lookup_tb(s);
     return true;
 }
@@ -8897,7 +8907,7 @@ static bool trans_CPS(DisasContext *s, arg_CPS *a)
 
 static bool trans_CPS_v7m(DisasContext *s, arg_CPS_v7m *a)
 {
-    TCGv_i32 tmp, addr, el;
+    TCGv_i32 tmp, addr;
 
     if (!arm_dc_feature(s, ARM_FEATURE_M)) {
         return false;
@@ -8920,9 +8930,7 @@ static bool trans_CPS_v7m(DisasContext *s, arg_CPS_v7m *a)
         gen_helper_v7m_msr(cpu_env, addr, tmp);
         tcg_temp_free_i32(addr);
     }
-    el = tcg_const_i32(s->current_el);
+    gen_rebuild_hflags(s, false);
-    gen_helper_rebuild_hflags_m32(cpu_env, el);
-    tcg_temp_free_i32(el);
     tcg_temp_free_i32(tmp);
     gen_lookup_tb(s);
     return true;