[TVMScript] Represent ramp as index slice #11308
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Hzfengsy
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May 13, 2022
| T.evaluate(T.call_extern("strided_compute", dtype="")) | ||
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| def strided_buffer_region(A: T.handle): |
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| def access_non_const_slice(A: T.handle): | ||
| # do not allow reversed slice step |
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CC @yelite would you mind taking a look as well? |
yelite
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May 14, 2022
junrushao
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May 14, 2022
mehrdadh
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May 16, 2022
* support represent ramp as index slice in tvmscript * fix testcase's comment, check slice lanes instead of extent
shtinsa
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May 17, 2022
* support represent ramp as index slice in tvmscript * fix testcase's comment, check slice lanes instead of extent
shingjan
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May 17, 2022
* support represent ramp as index slice in tvmscript * fix testcase's comment, check slice lanes instead of extent
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Hi there, the PR propose to represent
tir.RampNodein buffer access index just as python slice. I believe this could be a more user friendly way for script users on SIMD-based target, since it just mimic usages in various python numerical libraries like numpy.For example:
A[T.ramp(0, 1, 1024)]=>A[0:1024]A[T.ramp(i*32, 1, 32)]=>A[i*32:i*32+32]A[T.ramp(i*4, 4, 32)]=>A[i*4:i*4+128:4]The syntax sugar is only available for constant stride and lanes. Also please correct me on two points:
Slicewith non-trivial step is only allowed in buffer indices, we may want to ensure all other usages should check step==1.cc @junrushao1994 @Hzfengsy @Lunderberg