target/loongarch: Use actual operand size with vbsrl check

[PATCH] target/loongarch: Use actual operand size with vbsrl check

Posted by Bibo Mao 3 months, 3 weeks ago

Hardcoded 32 bytes is used for vbsrl emulation check, there is
problem when options lsx=on,lasx=off is used for vbsrl.v instruction
in TCG mode. It injects LASX exception rather LSX exception.

Here actual operand size is used.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 target/loongarch/tcg/insn_trans/trans_vec.c.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/loongarch/tcg/insn_trans/trans_vec.c.inc b/target/loongarch/tcg/insn_trans/trans_vec.c.inc
index 92b1d22e28..ba5ca98a33 100644
--- a/target/loongarch/tcg/insn_trans/trans_vec.c.inc
+++ b/target/loongarch/tcg/insn_trans/trans_vec.c.inc
@@ -5126,7 +5126,7 @@ static bool do_vbsrl_v(DisasContext *ctx, arg_vv_i *a, uint32_t oprsz)
 {
     int i, ofs;
 
-    if (!check_vec(ctx, 32)) {
+    if (!check_vec(ctx, oprsz)) {
         return true;
     }
 

base-commit: 1cf9bc6eba7506ab6d9de635f224259225f63466
-- 
2.39.3

Re: [PATCH] target/loongarch: Use actual operand size with vbsrl check

Posted by Philippe Mathieu-Daudé 3 months, 3 weeks ago

On 12/12/24 09:22, Bibo Mao wrote:
> Hardcoded 32 bytes is used for vbsrl emulation check, there is
> problem when options lsx=on,lasx=off is used for vbsrl.v instruction
> in TCG mode. It injects LASX exception rather LSX exception.
> 
> Here actual operand size is used.
> 
> Signed-off-by: Bibo Mao <maobibo@loongson.cn>
> ---
>   target/loongarch/tcg/insn_trans/trans_vec.c.inc | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

Fixes: df97f338076 ("target/loongarch: Implement xvreplve xvinsve0 
xvpickve")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

Re: [PATCH] target/loongarch: Use actual operand size with vbsrl check

Posted by Richard Henderson 3 months, 3 weeks ago

On 12/12/24 02:22, Bibo Mao wrote:
> Hardcoded 32 bytes is used for vbsrl emulation check, there is
> problem when options lsx=on,lasx=off is used for vbsrl.v instruction
> in TCG mode. It injects LASX exception rather LSX exception.
> 
> Here actual operand size is used.
> 
> Signed-off-by: Bibo Mao <maobibo@loongson.cn>
> ---
>   target/loongarch/tcg/insn_trans/trans_vec.c.inc | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/target/loongarch/tcg/insn_trans/trans_vec.c.inc b/target/loongarch/tcg/insn_trans/trans_vec.c.inc
> index 92b1d22e28..ba5ca98a33 100644
> --- a/target/loongarch/tcg/insn_trans/trans_vec.c.inc
> +++ b/target/loongarch/tcg/insn_trans/trans_vec.c.inc
> @@ -5126,7 +5126,7 @@ static bool do_vbsrl_v(DisasContext *ctx, arg_vv_i *a, uint32_t oprsz)
>   {
>       int i, ofs;
>   
> -    if (!check_vec(ctx, 32)) {
> +    if (!check_vec(ctx, oprsz)) {
>           return true;
>       }
>   
> 
> base-commit: 1cf9bc6eba7506ab6d9de635f224259225f63466

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

r~