* [PATCH] riscv: vector: fix xtheadvector save/restore
@ 2025-05-22 17:27 Han Gao
2025-05-22 18:27 ` Xiongchuan Tan
` (3 more replies)
0 siblings, 4 replies; 9+ messages in thread
From: Han Gao @ 2025-05-22 17:27 UTC (permalink / raw)
To: linux-riscv, Han Gao
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Charlie Jenkins, Jesse Taube, Andy Chiu, linux-kernel
Fix [1] save/restore vector register error
Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
Signed-off-by: Han Gao <rabenda.cn@gmail.com>
---
arch/riscv/include/asm/vector.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
index e8a83f55be2b..7df6355023a3 100644
--- a/arch/riscv/include/asm/vector.h
+++ b/arch/riscv/include/asm/vector.h
@@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
THEAD_VSETVLI_T4X0E8M8D1
THEAD_VSB_V_V0T0
"add t0, t0, t4\n\t"
- THEAD_VSB_V_V0T0
+ THEAD_VSB_V_V8T0
"add t0, t0, t4\n\t"
- THEAD_VSB_V_V0T0
+ THEAD_VSB_V_V16T0
"add t0, t0, t4\n\t"
- THEAD_VSB_V_V0T0
+ THEAD_VSB_V_V24T0
: : "r" (datap) : "memory", "t0", "t4");
} else {
asm volatile (
@@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
THEAD_VSETVLI_T4X0E8M8D1
THEAD_VLB_V_V0T0
"add t0, t0, t4\n\t"
- THEAD_VLB_V_V0T0
+ THEAD_VLB_V_V8T0
"add t0, t0, t4\n\t"
- THEAD_VLB_V_V0T0
+ THEAD_VLB_V_V16T0
"add t0, t0, t4\n\t"
- THEAD_VLB_V_V0T0
+ THEAD_VLB_V_V24T0
: : "r" (datap) : "memory", "t0", "t4");
} else {
asm volatile (
--
2.47.2
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^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-22 17:27 [PATCH] riscv: vector: fix xtheadvector save/restore Han Gao
@ 2025-05-22 18:27 ` Xiongchuan Tan
2025-05-22 22:15 ` Han Gao
2025-05-23 3:15 ` Charlie Jenkins
` (2 subsequent siblings)
3 siblings, 1 reply; 9+ messages in thread
From: Xiongchuan Tan @ 2025-05-22 18:27 UTC (permalink / raw)
To: Han Gao, linux-riscv
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Charlie Jenkins, Jesse Taube, Andy Chiu, linux-kernel
I tested this patch with llama.cpp while adding xtheadvector support.
Surprisingly, this bug did not prevent the LLM from generating plausible
output, though the model's responses became noticeably less coherent.
Tested-by: Xiongchuan Tan <tanxiongchuan@isrc.iscas.ac.cn>
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-22 18:27 ` Xiongchuan Tan
@ 2025-05-22 22:15 ` Han Gao
0 siblings, 0 replies; 9+ messages in thread
From: Han Gao @ 2025-05-22 22:15 UTC (permalink / raw)
To: linux-riscv
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Alexandre Ghiti,
Charlie Jenkins, Jesse Taube, Andy Chiu, linux-kernel,
Xiongchuan Tan
Sorry, forgot to add the fix tag
Fixes: d863910eabaf ("riscv: vector: Support xtheadvector save/restore")
On Fri, May 23, 2025 at 2:28 AM Xiongchuan Tan
<tanxiongchuan@isrc.iscas.ac.cn> wrote:
>
> I tested this patch with llama.cpp while adding xtheadvector support.
> Surprisingly, this bug did not prevent the LLM from generating plausible
> output, though the model's responses became noticeably less coherent.
>
> Tested-by: Xiongchuan Tan <tanxiongchuan@isrc.iscas.ac.cn>
>
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-22 17:27 [PATCH] riscv: vector: fix xtheadvector save/restore Han Gao
2025-05-22 18:27 ` Xiongchuan Tan
@ 2025-05-23 3:15 ` Charlie Jenkins
2025-05-23 8:53 ` Alexandre Ghiti
2025-06-12 20:10 ` patchwork-bot+linux-riscv
3 siblings, 0 replies; 9+ messages in thread
From: Charlie Jenkins @ 2025-05-23 3:15 UTC (permalink / raw)
To: Han Gao
Cc: linux-riscv, Paul Walmsley, Palmer Dabbelt, Albert Ou,
Alexandre Ghiti, Jesse Taube, Andy Chiu, linux-kernel
On Fri, May 23, 2025 at 01:27:01AM +0800, Han Gao wrote:
> Fix [1] save/restore vector register error
>
> Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
>
> Signed-off-by: Han Gao <rabenda.cn@gmail.com>
Thank you!
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
> ---
> arch/riscv/include/asm/vector.h | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
> index e8a83f55be2b..7df6355023a3 100644
> --- a/arch/riscv/include/asm/vector.h
> +++ b/arch/riscv/include/asm/vector.h
> @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
> THEAD_VSETVLI_T4X0E8M8D1
> THEAD_VSB_V_V0T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V8T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V16T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V24T0
> : : "r" (datap) : "memory", "t0", "t4");
> } else {
> asm volatile (
> @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
> THEAD_VSETVLI_T4X0E8M8D1
> THEAD_VLB_V_V0T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V8T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V16T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V24T0
> : : "r" (datap) : "memory", "t0", "t4");
> } else {
> asm volatile (
> --
> 2.47.2
>
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-22 17:27 [PATCH] riscv: vector: fix xtheadvector save/restore Han Gao
2025-05-22 18:27 ` Xiongchuan Tan
2025-05-23 3:15 ` Charlie Jenkins
@ 2025-05-23 8:53 ` Alexandre Ghiti
2025-05-23 9:46 ` Han Gao
2025-06-12 20:10 ` patchwork-bot+linux-riscv
3 siblings, 1 reply; 9+ messages in thread
From: Alexandre Ghiti @ 2025-05-23 8:53 UTC (permalink / raw)
To: Han Gao, linux-riscv
Cc: Paul Walmsley, Palmer Dabbelt, Albert Ou, Charlie Jenkins,
Jesse Taube, Andy Chiu, linux-kernel
Hi Han,
On 5/22/25 19:27, Han Gao wrote:
> Fix [1] save/restore vector register error
>
> Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
Would you mind rephrasing the log? It should explain what was wrong and
how you fixed it.
Thanks,
Alex
>
> Signed-off-by: Han Gao <rabenda.cn@gmail.com>
> ---
> arch/riscv/include/asm/vector.h | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
> index e8a83f55be2b..7df6355023a3 100644
> --- a/arch/riscv/include/asm/vector.h
> +++ b/arch/riscv/include/asm/vector.h
> @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
> THEAD_VSETVLI_T4X0E8M8D1
> THEAD_VSB_V_V0T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V8T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V16T0
> "add t0, t0, t4\n\t"
> - THEAD_VSB_V_V0T0
> + THEAD_VSB_V_V24T0
> : : "r" (datap) : "memory", "t0", "t4");
> } else {
> asm volatile (
> @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
> THEAD_VSETVLI_T4X0E8M8D1
> THEAD_VLB_V_V0T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V8T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V16T0
> "add t0, t0, t4\n\t"
> - THEAD_VLB_V_V0T0
> + THEAD_VLB_V_V24T0
> : : "r" (datap) : "memory", "t0", "t4");
> } else {
> asm volatile (
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-23 8:53 ` Alexandre Ghiti
@ 2025-05-23 9:46 ` Han Gao
2025-06-10 22:05 ` Palmer Dabbelt
0 siblings, 1 reply; 9+ messages in thread
From: Han Gao @ 2025-05-23 9:46 UTC (permalink / raw)
To: Alexandre Ghiti
Cc: linux-riscv, Paul Walmsley, Palmer Dabbelt, Albert Ou,
Charlie Jenkins, Jesse Taube, Andy Chiu, linux-kernel
I will release v2 later to add explanation and add fix tag
Thanks,
Han
On Fri, May 23, 2025 at 4:54 PM Alexandre Ghiti <alex@ghiti.fr> wrote:
>
> Hi Han,
>
> On 5/22/25 19:27, Han Gao wrote:
> > Fix [1] save/restore vector register error
> >
> > Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
>
>
> Would you mind rephrasing the log? It should explain what was wrong and
> how you fixed it.
>
> Thanks,
>
> Alex
>
>
> >
> > Signed-off-by: Han Gao <rabenda.cn@gmail.com>
> > ---
> > arch/riscv/include/asm/vector.h | 12 ++++++------
> > 1 file changed, 6 insertions(+), 6 deletions(-)
> >
> > diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
> > index e8a83f55be2b..7df6355023a3 100644
> > --- a/arch/riscv/include/asm/vector.h
> > +++ b/arch/riscv/include/asm/vector.h
> > @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
> > THEAD_VSETVLI_T4X0E8M8D1
> > THEAD_VSB_V_V0T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VSB_V_V0T0
> > + THEAD_VSB_V_V8T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VSB_V_V0T0
> > + THEAD_VSB_V_V16T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VSB_V_V0T0
> > + THEAD_VSB_V_V24T0
> > : : "r" (datap) : "memory", "t0", "t4");
> > } else {
> > asm volatile (
> > @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
> > THEAD_VSETVLI_T4X0E8M8D1
> > THEAD_VLB_V_V0T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VLB_V_V0T0
> > + THEAD_VLB_V_V8T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VLB_V_V0T0
> > + THEAD_VLB_V_V16T0
> > "add t0, t0, t4\n\t"
> > - THEAD_VLB_V_V0T0
> > + THEAD_VLB_V_V24T0
> > : : "r" (datap) : "memory", "t0", "t4");
> > } else {
> > asm volatile (
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-23 9:46 ` Han Gao
@ 2025-06-10 22:05 ` Palmer Dabbelt
2025-06-11 1:34 ` Charlie Jenkins
0 siblings, 1 reply; 9+ messages in thread
From: Palmer Dabbelt @ 2025-06-10 22:05 UTC (permalink / raw)
To: rabenda.cn
Cc: Alexandre Ghiti, linux-riscv, Paul Walmsley, aou, Charlie Jenkins,
jesse, andybnac, linux-kernel
On Fri, 23 May 2025 02:46:50 PDT (-0700), rabenda.cn@gmail.com wrote:
> I will release v2 later to add explanation and add fix tag
Sorry if I missed it, but I don't see a v2 (I'm scrubbing through stuff
post merge window).
>
> Thanks,
>
> Han
>
> On Fri, May 23, 2025 at 4:54 PM Alexandre Ghiti <alex@ghiti.fr> wrote:
>>
>> Hi Han,
>>
>> On 5/22/25 19:27, Han Gao wrote:
>> > Fix [1] save/restore vector register error
>> >
>> > Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
>>
>>
>> Would you mind rephrasing the log? It should explain what was wrong and
>> how you fixed it.
>>
>> Thanks,
>>
>> Alex
>>
>>
>> >
>> > Signed-off-by: Han Gao <rabenda.cn@gmail.com>
>> > ---
>> > arch/riscv/include/asm/vector.h | 12 ++++++------
>> > 1 file changed, 6 insertions(+), 6 deletions(-)
>> >
>> > diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
>> > index e8a83f55be2b..7df6355023a3 100644
>> > --- a/arch/riscv/include/asm/vector.h
>> > +++ b/arch/riscv/include/asm/vector.h
>> > @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
>> > THEAD_VSETVLI_T4X0E8M8D1
>> > THEAD_VSB_V_V0T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VSB_V_V0T0
>> > + THEAD_VSB_V_V8T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VSB_V_V0T0
>> > + THEAD_VSB_V_V16T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VSB_V_V0T0
>> > + THEAD_VSB_V_V24T0
>> > : : "r" (datap) : "memory", "t0", "t4");
>> > } else {
>> > asm volatile (
>> > @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
>> > THEAD_VSETVLI_T4X0E8M8D1
>> > THEAD_VLB_V_V0T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VLB_V_V0T0
>> > + THEAD_VLB_V_V8T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VLB_V_V0T0
>> > + THEAD_VLB_V_V16T0
>> > "add t0, t0, t4\n\t"
>> > - THEAD_VLB_V_V0T0
>> > + THEAD_VLB_V_V24T0
>> > : : "r" (datap) : "memory", "t0", "t4");
>> > } else {
>> > asm volatile (
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-06-10 22:05 ` Palmer Dabbelt
@ 2025-06-11 1:34 ` Charlie Jenkins
0 siblings, 0 replies; 9+ messages in thread
From: Charlie Jenkins @ 2025-06-11 1:34 UTC (permalink / raw)
To: Palmer Dabbelt
Cc: rabenda.cn, Alexandre Ghiti, linux-riscv, Paul Walmsley, aou,
jesse, andybnac, linux-kernel
On Tue, Jun 10, 2025 at 03:05:58PM -0700, Palmer Dabbelt wrote:
> On Fri, 23 May 2025 02:46:50 PDT (-0700), rabenda.cn@gmail.com wrote:
> > I will release v2 later to add explanation and add fix tag
>
> Sorry if I missed it, but I don't see a v2 (I'm scrubbing through stuff post
> merge window).
v2 is here: https://lore.kernel.org/all/9b9eb2337f3d5336ce813721f8ebea51e0b2b553.1747994822.git.rabenda.cn@gmail.com/
- Charlie
>
> >
> > Thanks,
> >
> > Han
> >
> > On Fri, May 23, 2025 at 4:54 PM Alexandre Ghiti <alex@ghiti.fr> wrote:
> > >
> > > Hi Han,
> > >
> > > On 5/22/25 19:27, Han Gao wrote:
> > > > Fix [1] save/restore vector register error
> > > >
> > > > Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
> > >
> > >
> > > Would you mind rephrasing the log? It should explain what was wrong and
> > > how you fixed it.
> > >
> > > Thanks,
> > >
> > > Alex
> > >
> > >
> > > >
> > > > Signed-off-by: Han Gao <rabenda.cn@gmail.com>
> > > > ---
> > > > arch/riscv/include/asm/vector.h | 12 ++++++------
> > > > 1 file changed, 6 insertions(+), 6 deletions(-)
> > > >
> > > > diff --git a/arch/riscv/include/asm/vector.h b/arch/riscv/include/asm/vector.h
> > > > index e8a83f55be2b..7df6355023a3 100644
> > > > --- a/arch/riscv/include/asm/vector.h
> > > > +++ b/arch/riscv/include/asm/vector.h
> > > > @@ -200,11 +200,11 @@ static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
> > > > THEAD_VSETVLI_T4X0E8M8D1
> > > > THEAD_VSB_V_V0T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VSB_V_V0T0
> > > > + THEAD_VSB_V_V8T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VSB_V_V0T0
> > > > + THEAD_VSB_V_V16T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VSB_V_V0T0
> > > > + THEAD_VSB_V_V24T0
> > > > : : "r" (datap) : "memory", "t0", "t4");
> > > > } else {
> > > > asm volatile (
> > > > @@ -236,11 +236,11 @@ static inline void __riscv_v_vstate_restore(struct __riscv_v_ext_state *restore_
> > > > THEAD_VSETVLI_T4X0E8M8D1
> > > > THEAD_VLB_V_V0T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VLB_V_V0T0
> > > > + THEAD_VLB_V_V8T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VLB_V_V0T0
> > > > + THEAD_VLB_V_V16T0
> > > > "add t0, t0, t4\n\t"
> > > > - THEAD_VLB_V_V0T0
> > > > + THEAD_VLB_V_V24T0
> > > > : : "r" (datap) : "memory", "t0", "t4");
> > > > } else {
> > > > asm volatile (
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] riscv: vector: fix xtheadvector save/restore
2025-05-22 17:27 [PATCH] riscv: vector: fix xtheadvector save/restore Han Gao
` (2 preceding siblings ...)
2025-05-23 8:53 ` Alexandre Ghiti
@ 2025-06-12 20:10 ` patchwork-bot+linux-riscv
3 siblings, 0 replies; 9+ messages in thread
From: patchwork-bot+linux-riscv @ 2025-06-12 20:10 UTC (permalink / raw)
To: Han Gao
Cc: linux-riscv, paul.walmsley, palmer, aou, alex, charlie, jesse,
andybnac, linux-kernel
Hello:
This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@dabbelt.com>:
On Fri, 23 May 2025 01:27:01 +0800 you wrote:
> Fix [1] save/restore vector register error
>
> Link: https://lore.kernel.org/all/20241113-xtheadvector-v11-9-236c22791ef9@rivosinc.com/ [1]
>
> Signed-off-by: Han Gao <rabenda.cn@gmail.com>
> ---
> arch/riscv/include/asm/vector.h | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
Here is the summary with links:
- riscv: vector: fix xtheadvector save/restore
https://git.kernel.org/riscv/c/4262bd0d9cc7
You are awesome, thank you!
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Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-05-22 17:27 [PATCH] riscv: vector: fix xtheadvector save/restore Han Gao
2025-05-22 18:27 ` Xiongchuan Tan
2025-05-22 22:15 ` Han Gao
2025-05-23 3:15 ` Charlie Jenkins
2025-05-23 8:53 ` Alexandre Ghiti
2025-05-23 9:46 ` Han Gao
2025-06-10 22:05 ` Palmer Dabbelt
2025-06-11 1:34 ` Charlie Jenkins
2025-06-12 20:10 ` patchwork-bot+linux-riscv
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