[mlir][ArmNeon] Implements LowerVectorToArmNeon Pattern for SMMLA (#81895)

This patch adds a the `LowerVectorToArmNeonPattern` patterns to the
ArmNeon.

This pattern inspects `vector.contract` ops that can be 1-1 mapped to an
`arm.neon.smmla` intrinsic. The contract ops must be separated into
tiles who's inputs must fit that of a single smmla op (`2x8xi32` inputs
and `2x2xi32` output). The `vector.contract` inputs must be sign
extended from narrow types (<=i8) to be converted. If all conditions are
met, an smmla op is inserted with additional `vector.shape_casts` to
handle linearizing the input and output dimension.

0 files changed, 0 insertions, 0 deletions