Next steps V1.0.5 and POWER10

[munroesj52]

The spreadsheet below list new vector instructions for POWER8/9/10 and where there is corresponding implementation in pveclib a link to the operation docs.

ISA2PVECmap.pdf

It is time to start thinking about next steps:

Short term needs to fill in gaps in the current (P8/9) support?

And priorities for early P10 support? Note several new P10 vectors already have equivalent implementations for P7/8/9.

[munroesj52]

Some additional operations.

• load gather / store scatter with signed/unsigned work/dword indexes.
• floating-point extract/insert exp/sig for float/double/float128
• floating-point convert to/from int for word/dword/qword
• Additional integer multiply/divide/modulo from P10.
• Float128 round to odd operations.

*examples for:

• libmvec functions (sin/cos/?)
• Long division for int512

[munroesj52]

Implemented so far:

• load gather / store scatter
• Vector integer multiplies for existing and new operations
• Vector quadword shift/rotate .
• Vector expand mask from sign bit (for integer and floating point).

[munroesj52]

Additional ops that should be added:

• vec_splat_s64/vec_splat_u64
• vec_splat_s128/vec_splat_u128
• vec_signexti/vec_signextll/vec_signextq
• vec_div/vec_dive for integer word/doubleword/quadword