On Wed, Oct 30, 2024 at 2:39 AM <[email protected]> wrote:
>
> From: Pan Li <[email protected]>
>
> This patch would like to add doc for the below 2 standard names.
>
> 1. strided load: v = mask_len_strided_load (ptr, stried, mask, len, bias)
> 2. strided store: mask_len_stried_store (ptr, stride, v, mask, len, bias)
>
> gcc/ChangeLog:
>
> * doc/md.texi: Add doc for mask_len_stried_load{store}.
>
> Signed-off-by: Pan Li <[email protected]>
> Co-Authored-By: Juzhe-Zhong <[email protected]>
> ---
> gcc/doc/md.texi | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
> index 6d9c8643739..83036383fe1 100644
> --- a/gcc/doc/md.texi
> +++ b/gcc/doc/md.texi
> @@ -5135,6 +5135,20 @@ Bit @var{i} of the mask is set if element @var{i} of
> the result should
> be loaded from memory and clear if element @var{i} of the result should be
> undefined.
> Mask elements @var{i} with @var{i} > (operand 6 + operand 7) are ignored.
>
> +@cindex @code{mask_len_strided_load@var{m}} instruction pattern
> +@item @samp{mask_len_strided_load@var{m}}
> +Load several separate memory locations into a destination vector of mode
> @var{m}.
> +Operand 0 is a destination vector of mode @var{m}.
> +Operand 1 is a scalar base address and operand 2 is a scalar stride of Pmode.
> +operand 3 is mask operand, operand 4 is length operand and operand 5 is bias
> operand.
> +The instruction can be seen as a special case of
> @code{mask_len_gather_load@var{m}@var{n}}
> +with an offset vector that is a @code{vec_series} with operand 1 as base and
> operand 2 as step.
wouldn't it be zero as base?
> +For each element index i load address is operand 1 + @var{i} * operand 2.
the load address
Otherwise OK.
Thanks,
Richard.
> +Similar to mask_len_load, the instruction loads at most (operand 4 + operand
> 5) elements from memory.
> +Element @var{i} of the mask (operand 3) is set if element @var{i} of the
> result should
> +be loaded from memory and clear if element @var{i} of the result should be
> zero.
> +Mask elements @var{i} with @var{i} > (operand 4 + operand 5) are ignored.
> +
> @cindex @code{scatter_store@var{m}@var{n}} instruction pattern
> @item @samp{scatter_store@var{m}@var{n}}
> Store a vector of mode @var{m} into several distinct memory locations.
> @@ -5172,6 +5186,19 @@ at most (operand 6 + operand 7) elements of (operand
> 4) to memory.
> Bit @var{i} of the mask is set if element @var{i} of (operand 4) should be
> stored.
> Mask elements @var{i} with @var{i} > (operand 6 + operand 7) are ignored.
>
> +@cindex @code{mask_len_strided_store@var{m}} instruction pattern
> +@item @samp{mask_len_strided_store@var{m}}
> +Store a vector of mode m into several distinct memory locations.
> +Operand 0 is a scalar base address and operand 1 is scalar stride of Pmode.
> +Operand 2 is the vector of values that should be stored, which is of mode
> @var{m}.
> +operand 3 is mask operand, operand 4 is length operand and operand 5 is bias
> operand.
> +The instruction can be seen as a special case of
> @code{mask_len_scatter_store@var{m}@var{n}}
> +with an offset vector that is a @code{vec_series} with operand 1 as base and
> operand 1 as step.
> +For each element index i store address is operand 0 + @var{i} * operand 1.
> +Similar to mask_len_store, the instruction stores at most (operand 4 +
> operand 5) elements of
> +mask (operand 3) to memory. Element @var{i} of the mask is set if element
> @var{i} of (operand 3)
> +should be stored. Mask elements @var{i} with @var{i} > (operand 4 + operand
> 5) are ignored.
> +
> @cindex @code{vec_set@var{m}} instruction pattern
> @item @samp{vec_set@var{m}}
> Set given field in the vector value. Operand 0 is the vector to modify,
> --
> 2.43.0
>
