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History

Nicolas Vasilache bf7c490ab7

[mlir][Vector] Add a rewrite pattern for better low-precision bitcast… (#66387 )

…(trunci) expansion

This revision adds a rewrite for sequences of vector `bitcast(trunci)`
to use a more efficient sequence of vector operations comprising
`shuffle` and `bitwise` ops.

Such patterns appear naturally when writing quantization /
dequantization functionality with the vector dialect.

The rewrite performs a simple enumeration of each of the bits in the
result vector and determines its provenance in the pre-trunci vector.
The enumeration is used to generate the proper sequence of `shuffle`,
`andi`, `ori` followed by an optional final `trunci`/`extui`.

The rewrite currently only applies to 1-D non-scalable vectors and bails
out if the final vector element type is not a multiple of 8. This is a
failsafe heuristic determined empirically: if the resulting type is not
an even number of bytes, further complexities arise that are not
improved by this pattern: the heavy lifting still needs to be done by
LLVM.

2023-09-18 15:08:18 +02:00

benchmark/python

[NFC][Py Reformat] Reformat python files in mlir subdir

2023-05-26 08:05:40 +02:00

cmake/modules

[mlir][python bindings] generate all the enums

2023-08-23 15:03:55 -05:00

docs

[mlir][bufferization] Add an ownership based buffer deallocation pass (#66337 )

2023-09-14 12:13:37 +02:00

examples

[mlir] Move FunctionInterfaces to Interfaces directory and inherit from CallableOpInterface