[v8,05/45] target/arm: Rename DISAS_UPDATE to DISAS_UPDATE_EXIT

Message ID 20200623193658.623279-6-richard.henderson@linaro.org
State Superseded
Headers show
Series
  • target/arm: Implement ARMv8.5-MemTag, system mode
Related show

Commit Message

Richard Henderson June 23, 2020, 7:36 p.m.
Emphasize that the is_jmp option exits to the main loop.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 target/arm/translate.h         | 14 ++++++++------
 target/arm/translate-a64.c     |  8 ++++----
 target/arm/translate-vfp.inc.c |  2 +-
 target/arm/translate.c         | 12 ++++++------
 4 files changed, 19 insertions(+), 17 deletions(-)

-- 
2.25.1

Patch

diff --git a/target/arm/translate.h b/target/arm/translate.h
index 62ed5c4780..6c01f47983 100644
--- a/target/arm/translate.h
+++ b/target/arm/translate.h
@@ -148,7 +148,8 @@  static inline void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
 
 /* is_jmp field values */
 #define DISAS_JUMP      DISAS_TARGET_0 /* only pc was modified dynamically */
-#define DISAS_UPDATE    DISAS_TARGET_1 /* cpu state was modified dynamically */
+/* CPU state was modified dynamically; exit to main loop for interrupts. */
+#define DISAS_UPDATE_EXIT  DISAS_TARGET_1
 /* These instructions trap after executing, so the A32/T32 decoder must
  * defer them until after the conditional execution state has been updated.
  * WFI also needs special handling when single-stepping.
@@ -164,11 +165,12 @@  static inline void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
  * custom end-of-TB code)
  */
 #define DISAS_BX_EXCRET DISAS_TARGET_8
-/* For instructions which want an immediate exit to the main loop,
- * as opposed to attempting to use lookup_and_goto_ptr. Unlike
- * DISAS_UPDATE this doesn't write the PC on exiting the translation
- * loop so you need to ensure something (gen_a64_set_pc_im or runtime
- * helper) has done so before we reach return from cpu_tb_exec.
+/*
+ * For instructions which want an immediate exit to the main loop, as opposed
+ * to attempting to use lookup_and_goto_ptr.  Unlike DISAS_UPDATE_EXIT, this
+ * doesn't write the PC on exiting the translation loop so you need to ensure
+ * something (gen_a64_set_pc_im or runtime helper) has done so before we reach
+ * return from cpu_tb_exec.
  */
 #define DISAS_EXIT      DISAS_TARGET_9
 
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index a0e72ad694..63029bbc59 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1616,7 +1616,7 @@  static void handle_msr_i(DisasContext *s, uint32_t insn,
         gen_helper_msr_i_daifclear(cpu_env, t1);
         tcg_temp_free_i32(t1);
         /* For DAIFClear, exit the cpu loop to re-evaluate pending IRQs.  */
-        s->base.is_jmp = DISAS_UPDATE;
+        s->base.is_jmp = DISAS_UPDATE_EXIT;
         break;
 
     default:
@@ -1795,7 +1795,7 @@  static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
 
     if ((tb_cflags(s->base.tb) & CF_USE_ICOUNT) && (ri->type & ARM_CP_IO)) {
         /* I/O operations must end the TB here (whether read or write) */
-        s->base.is_jmp = DISAS_UPDATE;
+        s->base.is_jmp = DISAS_UPDATE_EXIT;
     }
     if (!isread && !(ri->type & ARM_CP_SUPPRESS_TB_END)) {
         /*
@@ -1810,7 +1810,7 @@  static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
          * but allow this to be suppressed by the register definition
          * (usually only necessary to work around guest bugs).
          */
-        s->base.is_jmp = DISAS_UPDATE;
+        s->base.is_jmp = DISAS_UPDATE_EXIT;
     }
 }
 
@@ -14304,7 +14304,7 @@  static void aarch64_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
             gen_goto_tb(dc, 1, dc->base.pc_next);
             break;
         default:
-        case DISAS_UPDATE:
+        case DISAS_UPDATE_EXIT:
             gen_a64_set_pc_im(dc->base.pc_next);
             /* fall through */
         case DISAS_EXIT:
diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
index e1a9017598..4e1fbe0dc0 100644
--- a/target/arm/translate-vfp.inc.c
+++ b/target/arm/translate-vfp.inc.c
@@ -2861,6 +2861,6 @@  static bool trans_VLLDM_VLSTM(DisasContext *s, arg_VLLDM_VLSTM *a)
     tcg_temp_free_i32(fptr);
 
     /* End the TB, because we have updated FP control bits */
-    s->base.is_jmp = DISAS_UPDATE;
+    s->base.is_jmp = DISAS_UPDATE_EXIT;
     return true;
 }
diff --git a/target/arm/translate.c b/target/arm/translate.c
index 6d18892ade..45ea788370 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -2876,7 +2876,7 @@  static void gen_msr_banked(DisasContext *s, int r, int sysm, int rn)
     tcg_temp_free_i32(tcg_tgtmode);
     tcg_temp_free_i32(tcg_regno);
     tcg_temp_free_i32(tcg_reg);
-    s->base.is_jmp = DISAS_UPDATE;
+    s->base.is_jmp = DISAS_UPDATE_EXIT;
 }
 
 static void gen_mrs_banked(DisasContext *s, int r, int sysm, int rn)
@@ -2898,7 +2898,7 @@  static void gen_mrs_banked(DisasContext *s, int r, int sysm, int rn)
     tcg_temp_free_i32(tcg_tgtmode);
     tcg_temp_free_i32(tcg_regno);
     store_reg(s, rn, tcg_reg);
-    s->base.is_jmp = DISAS_UPDATE;
+    s->base.is_jmp = DISAS_UPDATE_EXIT;
 }
 
 /* Store value to PC as for an exception return (ie don't
@@ -6153,7 +6153,7 @@  static void gen_srs(DisasContext *s,
         tcg_temp_free_i32(tmp);
     }
     tcg_temp_free_i32(addr);
-    s->base.is_jmp = DISAS_UPDATE;
+    s->base.is_jmp = DISAS_UPDATE_EXIT;
 }
 
 /* Generate a label used for skipping this instruction */
@@ -9202,7 +9202,7 @@  static bool trans_SETEND(DisasContext *s, arg_SETEND *a)
     }
     if (a->E != (s->be_data == MO_BE)) {
         gen_helper_setend(cpu_env);
-        s->base.is_jmp = DISAS_UPDATE;
+        s->base.is_jmp = DISAS_UPDATE_EXIT;
     }
     return true;
 }
@@ -9925,7 +9925,7 @@  static void arm_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
             break;
         case DISAS_NEXT:
         case DISAS_TOO_MANY:
-        case DISAS_UPDATE:
+        case DISAS_UPDATE_EXIT:
             gen_set_pc_im(dc, dc->base.pc_next);
             /* fall through */
         default:
@@ -9952,7 +9952,7 @@  static void arm_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu)
         case DISAS_JUMP:
             gen_goto_ptr();
             break;
-        case DISAS_UPDATE:
+        case DISAS_UPDATE_EXIT:
             gen_set_pc_im(dc, dc->base.pc_next);
             /* fall through */
         default: