man; Philipp
> Tomsich; Camel Coder; Bruce Hoult; Juzhe-Zhong; Jun Sha; Xianmiao Qu; Jin Ma
> CC: Christoph Müllner
> Subject: [PATCH] RISC-V: Don't add fractional LMUL types to V_VLS for
> XTheadVector
> The expansion of `memset` (via expand_builtin_memset_args())
> uses clear_
On Fri, Mar 22, 2024 at 4:43 AM Bruce Hoult wrote:
>
> > The effect is demonstrated by a new test case that shows
> that the by-pieces framework now emits `sb` instructions
> instead of triggering an ICE
>
> So these small memset() now don't use RVV at all if xtheadvector is enabled?
Yes, but
> The effect is demonstrated by a new test case that shows
that the by-pieces framework now emits `sb` instructions
instead of triggering an ICE
So these small memset() now don't use RVV at all if xtheadvector is enabled?
I don't have evidence whether the use of RVV (whether V or
xtheadvector)
LGTM.
juzhe.zh...@rivai.ai
From: Christoph Müllner
Date: 2024-03-22 07:45
To: gcc-patches; Kito Cheng; Palmer Dabbelt; Andrew Waterman; Philipp Tomsich;
Camel Coder; Bruce Hoult; Juzhe-Zhong; Jun Sha; Xianmiao Qu; Jin Ma
CC: Christoph Müllner
Subject: [PATCH] RISC-V: Don't add fractional
The expansion of `memset` (via expand_builtin_memset_args())
uses clear_by_pieces() and store_by_pieces() to avoid calls
to the C runtime. To check if a type can be used for that purpose
the function by_pieces_mode_supported_p() tests if a `mov` and
a `vec_duplicate` INSN can be expaned by the
