[v2] tcg vector improvements

[Qemu-devel] [PATCH v2 27/29] target/s390x: Use tcg_gen_abs_i64

Posted by Richard Henderson 5 years, 1 month ago

Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/s390x/translate.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index d4951836ad..e8e8a79b7d 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -1407,13 +1407,7 @@ static DisasJumpType help_branch(DisasContext *s, DisasCompare *c,
 
 static DisasJumpType op_abs(DisasContext *s, DisasOps *o)
 {
-    TCGv_i64 z, n;
-    z = tcg_const_i64(0);
-    n = tcg_temp_new_i64();
-    tcg_gen_neg_i64(n, o->in2);
-    tcg_gen_movcond_i64(TCG_COND_LT, o->out, o->in2, z, n, o->in2);
-    tcg_temp_free_i64(n);
-    tcg_temp_free_i64(z);
+    tcg_gen_abs_i64(o->out, o->in2);
     return DISAS_NEXT;
 }
 
-- 
2.17.1

Re: [Qemu-devel] [PATCH v2 27/29] target/s390x: Use tcg_gen_abs_i64

Posted by David Hildenbrand 5 years, 1 month ago

On 01.05.19 07:05, Richard Henderson wrote:
> Cc: David Hildenbrand <david@redhat.com>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  target/s390x/translate.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/target/s390x/translate.c b/target/s390x/translate.c
> index d4951836ad..e8e8a79b7d 100644
> --- a/target/s390x/translate.c
> +++ b/target/s390x/translate.c
> @@ -1407,13 +1407,7 @@ static DisasJumpType help_branch(DisasContext *s, DisasCompare *c,
>  
>  static DisasJumpType op_abs(DisasContext *s, DisasOps *o)
>  {
> -    TCGv_i64 z, n;
> -    z = tcg_const_i64(0);
> -    n = tcg_temp_new_i64();
> -    tcg_gen_neg_i64(n, o->in2);
> -    tcg_gen_movcond_i64(TCG_COND_LT, o->out, o->in2, z, n, o->in2);
> -    tcg_temp_free_i64(n);
> -    tcg_temp_free_i64(z);
> +    tcg_gen_abs_i64(o->out, o->in2);
>      return DISAS_NEXT;
>  }
>  
> 
Reviewed-by: David Hildenbrand <david@redhat.com>

-- 

Thanks,

David / dhildenb