[microTVM] Replace arm_nnsupportfunctions.h with arm_acle.h#13363
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asparkhi merged 6 commits intoapache:mainfrom Jan 9, 2023
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[microTVM] Replace arm_nnsupportfunctions.h with arm_acle.h#13363asparkhi merged 6 commits intoapache:mainfrom
asparkhi merged 6 commits intoapache:mainfrom
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The include is removed in #13242, so we can wait for that to land 😸 |
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This attempts to replace the CMSIS-NN header with a more portable alternative and avoid dependence on CMSIS
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The packing definitions aren't implemented as ACLE intrinsics nor is there a simple way to convince a C compiler to generate them.
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@Mousius any update on this? |
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We have started looking at it. I am able to reproduce the hang locally: |
Introduce `memcpy` to explain to the compiler that we're changing the alignment of `int16_t` to `int32_t`. What this appears to actually do is encourage the compiler to use three loads rather than one double load plus a regular load. The padded array is aligned as an `int16_t`, it isn't guaranteed to behave like an `int32_t` aligned array. One of the side effects of the type punning from `int16_t*` to `int32_t*` is that we're effectively lying to the compiler that this is correctly aligned and it can use instructions which load multiple `int32_t`s at the same time - this does not work 😿 Co-authored-by: Ashutosh Parkhi <ashutosh.parkhi@arm.com>
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…3363) * [microTVM] Replace arm_nnsupportfunctions.h with arm_acle.h This attempts to replace the CMSIS-NN header with a more portable alternative and avoid dependence on CMSIS * Remove CMSIS __STATIC_FORCEINLINE macro * Replace more intrinsics with ACLE variants * Use builtins for intrinsics missing in older GCC * Re-use common_includes to propagate shared functions The packing definitions aren't implemented as ACLE intrinsics nor is there a simple way to convince a C compiler to generate them. * Properly align memory access for Introduce `memcpy` to explain to the compiler that we're changing the alignment of `int16_t` to `int32_t`. What this appears to actually do is encourage the compiler to use three loads rather than one double load plus a regular load. The padded array is aligned as an `int16_t`, it isn't guaranteed to behave like an `int32_t` aligned array. One of the side effects of the type punning from `int16_t*` to `int32_t*` is that we're effectively lying to the compiler that this is correctly aligned and it can use instructions which load multiple `int32_t`s at the same time - this does not work 😿 Co-authored-by: Ashutosh Parkhi <ashutosh.parkhi@arm.com>
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This attempts to replace the CMSIS-NN header with a more portable alternative and avoid dependence on CMSIS