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xtheadvector tuple create insert and extract #127

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nihui opened this issue Aug 27, 2024 · 2 comments · Fixed by #130
Closed

xtheadvector tuple create insert and extract #127

nihui opened this issue Aug 27, 2024 · 2 comments · Fixed by #130

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@nihui
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nihui commented Aug 27, 2024 •
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How to create one vfloat32m1x8_t from eight vfloat32m1_t ?
How to extract one vfloat32m1_t by tuple index from one vfloat32m1x8_t ?

There is no __riscv_vset_v_f32m1_f32m1x8 or __riscv_vget_v_f32m1_f32m1x8 intrinsics as stated in https://github.com/riscv-non-isa/rvv-intrinsic-doc/blob/v0.12.x/auto-generated/intrinsic_funcs/11_miscellaneous_vector_functions.md#vector-insertion-functions

I have tried v[0] or v.v0 but nothing magical happened
@nihui nihui changed the title xtheadvector tuple conversion xtheadvector tuple create insert and extract Aug 27, 2024
@imkiva
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imkiva commented Aug 28, 2024 •
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The xtheadvector doesn't seem to have vget/vset on tuple types, as per https://occ-oss-prod.oss-cn-hangzhou.aliyuncs.com/resource/1836682/1638774209491/Xuantie+900+Series+RVV-0.7.1+Intrinsic+Manual.pdf page 898.

Will emulate these intrinsics, thanks for reporting ❤️

@nihui
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nihui commented Aug 30, 2024

some tests from gcc 15 on master branch
gcc provides all the following intrinsics with -march=rv64gc_zfh_xtheadvector

__riscv_vcreate_v_f32m1x8
__riscv_vset_v_f32m1_f32m1x8
__riscv_vget_v_f32m1x8_f32m1

@nihui nihui mentioned this issue Aug 30, 2024
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@imkiva imkiva mentioned this issue Aug 30, 2024
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[Clang][XTHeadVector] support vget/vset/vcreate on vector tuple types imkiva/llvm-project
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@nihui @imkiva