diff mbox series

[v3,04/16] tcg/aarch64: Fold away "noaddr" branch routines

Message ID 20181130215221.20554-5-richard.henderson@linaro.org
State Superseded
Headers show
Series tcg: Assorted cleanups | expand

Commit Message

Richard Henderson Nov. 30, 2018, 9:52 p.m. UTC
There are one use apiece for these.  There is no longer a need for
preserving branch offset operands, as we no longer re-translate.

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

---
 tcg/aarch64/tcg-target.inc.c | 21 ++-------------------
 1 file changed, 2 insertions(+), 19 deletions(-)

-- 
2.17.2

Comments

Alex Bennée Dec. 3, 2018, 3:49 p.m. UTC | #1
Richard Henderson <richard.henderson@linaro.org> writes:

> There are one use apiece for these.  There is no longer a need for

> preserving branch offset operands, as we no longer re-translate.

>

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


Reviewed-by: Alex Bennée <alex.bennee@linaro.org>


> ---

>  tcg/aarch64/tcg-target.inc.c | 21 ++-------------------

>  1 file changed, 2 insertions(+), 19 deletions(-)

>

> diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c

> index a41b633960..28de0226fb 100644

> --- a/tcg/aarch64/tcg-target.inc.c

> +++ b/tcg/aarch64/tcg-target.inc.c

> @@ -1129,23 +1129,6 @@ static inline void tcg_out_goto_long(TCGContext *s, tcg_insn_unit *target)

>      }

>  }

>

> -static inline void tcg_out_goto_noaddr(TCGContext *s)

> -{

> -    /* We pay attention here to not modify the branch target by reading from

> -       the buffer. This ensure that caches and memory are kept coherent during

> -       retranslation.  Mask away possible garbage in the high bits for the

> -       first translation, while keeping the offset bits for retranslation. */

> -    uint32_t old = tcg_in32(s);

> -    tcg_out_insn(s, 3206, B, old);

> -}

> -

> -static inline void tcg_out_goto_cond_noaddr(TCGContext *s, TCGCond c)

> -{

> -    /* See comments in tcg_out_goto_noaddr.  */

> -    uint32_t old = tcg_in32(s) >> 5;

> -    tcg_out_insn(s, 3202, B_C, c, old);

> -}

> -

>  static inline void tcg_out_callr(TCGContext *s, TCGReg reg)

>  {

>      tcg_out_insn(s, 3207, BLR, reg);

> @@ -1192,7 +1175,7 @@ static inline void tcg_out_goto_label(TCGContext *s, TCGLabel *l)

>  {

>      if (!l->has_value) {

>          tcg_out_reloc(s, s->code_ptr, R_AARCH64_JUMP26, l, 0);

> -        tcg_out_goto_noaddr(s);

> +        tcg_out_insn(s, 3206, B, 0);

>      } else {

>          tcg_out_goto(s, l->u.value_ptr);

>      }

> @@ -1523,7 +1506,7 @@ static void tcg_out_tlb_read(TCGContext *s, TCGReg addr_reg, TCGMemOp opc,

>

>      /* If not equal, we jump to the slow path. */

>      *label_ptr = s->code_ptr;

> -    tcg_out_goto_cond_noaddr(s, TCG_COND_NE);

> +    tcg_out_insn(s, 3202, B_C, TCG_COND_NE, 0);

>  }

>

>  #endif /* CONFIG_SOFTMMU */



--
Alex Bennée
diff mbox series

Patch

diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c
index a41b633960..28de0226fb 100644
--- a/tcg/aarch64/tcg-target.inc.c
+++ b/tcg/aarch64/tcg-target.inc.c
@@ -1129,23 +1129,6 @@  static inline void tcg_out_goto_long(TCGContext *s, tcg_insn_unit *target)
     }
 }
 
-static inline void tcg_out_goto_noaddr(TCGContext *s)
-{
-    /* We pay attention here to not modify the branch target by reading from
-       the buffer. This ensure that caches and memory are kept coherent during
-       retranslation.  Mask away possible garbage in the high bits for the
-       first translation, while keeping the offset bits for retranslation. */
-    uint32_t old = tcg_in32(s);
-    tcg_out_insn(s, 3206, B, old);
-}
-
-static inline void tcg_out_goto_cond_noaddr(TCGContext *s, TCGCond c)
-{
-    /* See comments in tcg_out_goto_noaddr.  */
-    uint32_t old = tcg_in32(s) >> 5;
-    tcg_out_insn(s, 3202, B_C, c, old);
-}
-
 static inline void tcg_out_callr(TCGContext *s, TCGReg reg)
 {
     tcg_out_insn(s, 3207, BLR, reg);
@@ -1192,7 +1175,7 @@  static inline void tcg_out_goto_label(TCGContext *s, TCGLabel *l)
 {
     if (!l->has_value) {
         tcg_out_reloc(s, s->code_ptr, R_AARCH64_JUMP26, l, 0);
-        tcg_out_goto_noaddr(s);
+        tcg_out_insn(s, 3206, B, 0);
     } else {
         tcg_out_goto(s, l->u.value_ptr);
     }
@@ -1523,7 +1506,7 @@  static void tcg_out_tlb_read(TCGContext *s, TCGReg addr_reg, TCGMemOp opc,
 
     /* If not equal, we jump to the slow path. */
     *label_ptr = s->code_ptr;
-    tcg_out_goto_cond_noaddr(s, TCG_COND_NE);
+    tcg_out_insn(s, 3202, B_C, TCG_COND_NE, 0);
 }
 
 #endif /* CONFIG_SOFTMMU */