diff mbox series

[v2,60/76] target/microblaze: Replace clear_imm with tb_flags_to_set

Message ID 20200828141929.77854-61-richard.henderson@linaro.org
State Superseded
Headers show
Series target/microblaze improvements | expand

Commit Message

Richard Henderson Aug. 28, 2020, 2:19 p.m. UTC 
This more general update variable will be able to handle
delay slots as well.

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

---
 target/microblaze/translate.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

-- 
2.25.1
diff mbox series

Patch

diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 597b96ffb3..c0b586f467 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -75,7 +75,7 @@  typedef struct DisasContext {
     unsigned int cpustate_changed;
     unsigned int delayed_branch;
     unsigned int tb_flags;
-    unsigned int clear_imm;
+    unsigned int tb_flags_to_set;
     int mem_index;
 
 #define JMP_NOJMP     0
@@ -535,8 +535,7 @@  static bool trans_imm(DisasContext *dc, arg_imm *arg)
 {
     dc->ext_imm = arg->imm << 16;
     tcg_gen_movi_i32(cpu_imm, dc->ext_imm);
-    dc->tb_flags |= IMM_FLAG;
-    dc->clear_imm = 0;
+    dc->tb_flags_to_set = IMM_FLAG;
     return true;
 }
 
@@ -1688,7 +1687,8 @@  static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
                   (uint32_t)dc->base.pc_next);
     }
 
-    dc->clear_imm = 1;
+    dc->tb_flags_to_set = 0;
+
     ir = cpu_ldl_code(env, dc->base.pc_next);
     if (!decode(dc, ir)) {
         old_decode(dc, ir);
@@ -1700,10 +1700,13 @@  static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
         dc->r0_set = false;
     }
 
-    if (dc->clear_imm && (dc->tb_flags & IMM_FLAG)) {
-        dc->tb_flags &= ~IMM_FLAG;
+    /* Discard the imm global when its contents cannot be used. */
+    if ((dc->tb_flags & ~dc->tb_flags_to_set) & IMM_FLAG) {
         tcg_gen_discard_i32(cpu_imm);
     }
+
+    dc->tb_flags &= ~IMM_FLAG;
+    dc->tb_flags |= dc->tb_flags_to_set;
     dc->base.pc_next += 4;
 
     if (dc->delayed_branch && --dc->delayed_branch == 0) {