tree cea4c68e5a6525a05b4565be83d58b7c011b96c4
parent 0e8f0b51ff598689b5eccc8b28c402b0dbcc97be
author Fraser Cormack <fraser@codeplay.com> 1747133255 +0100
committer GitHub <noreply@github.com> 1747133255 +0100
gpgsig -----BEGIN PGP SIGNATURE-----
 
 wsFcBAABCAAQBQJoIyNHCRC1aQ7uu5UhlAAA3JgQAGpIe5CArZ9GksYQE5JphdWI
 4T7oXMnqYuKoudWvejx+xakaMzr/GbQ1WRt8j1OFfWA7S5kLc7wldDeNLQVqUJzA
 tCH/aUzZ7FDjtbvF9CspLaeT6Gw3XjARAh3biFUF6GgneWSG7EBygGMX6d9IvTD4
 hvlCrQs2D9q7RiCQYgIPExSG2iLkvwTQEgZvh9eRtfT3P7y6b5bJNpDBb2RDdT2u
 LKb2T1evRqledQxHEGEebTfpQ0P2Sc09Yh3pzOgo/ohFagXtQqFj1MOKYnW+i9JT
 UZp+SKoODehQsgz/Rr5l+PZ5iCiiCi8PVYBZA3+HGVNfFBXvqm4B2sqllJkRUYOc
 kjNdsdYltJbsmg878y6cPATPnUzVPXr1B96CTW7W7T6WLCxwbL1fNOEu6b5/EgKv
 KlxJbUufUdGU9D9ZmV7XAuUWmsmohRo3N2+Ir7oDlUlKmbID2dqdfHteQ+BvTAih
 vE5nP1zLBnb0QyDjZugQhRAeJ5znoClzFC3BE5OnptP1qgqYaB7g04CRetf/qhhj
 UmpnrumatlV4FXA0LUOJJ8YmMU97uRiu2OVY0Oy1RXFxwT7cLSirWdthtGVh1fN+
 cYH2NpLadGaQynS4Uigzey21guJ31qtS7xA1dZQIVV1wLMWrO8kjn3nJBFB98yNy
 YJGSmpHbK0pKjfGZPtt2
 =in7a
 -----END PGP SIGNATURE-----
 

[libclc] Move logb/ilogb to CLC library; optimize (#128028)

This commit moves the logb and ilogb builtins to the CLC library.

It simultaneously optimizes them both for vector types and for half
types. Vector types were being scalarized in some cases. Half types were
previously promoting to float, whereas this commit provides them a
native implementation.

Everything passes the OpenCL-CTS.

I had to intuit some magic numbers used by these implementations in
order to generate the half variants. I gave them clearer definitions
derived from what I believe are their actual component numbers, but
named them 'magic' to convey that they weren't derived from first
principles.