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| author | Roland Scheidegger <sroland@vmware.com> | 2010-09-24 15:02:24 +0200 |
|---|---|---|
| committer | José Fonseca <jfonseca@vmware.com> | 2010-09-25 12:19:31 +0100 |
| commit | 46d05d4ef99857e50d978247917f3e16574418f4 (patch) | |
| tree | fdb7bd877ce5cac758448196873375a51d6934ef /docs/thanks.html | |
| parent | 26dc60d0a32f3e5b8084fda5991b762a721662e8 (diff) | |
gallivm: don't use URem/UDiv when calculating offsets for blocks
While it's true that llvm can and will indeed replace this with bit
arithmetic (since block height/width is POT), it does so (llvm 2.7) by element
and hence extracts/shifts/reinserts each element individually.
This costs about 16 instructions (and extract is not really fast) vs. 1...
Diffstat (limited to 'docs/thanks.html')
0 files changed, 0 insertions, 0 deletions