Matt Pharr e156651190 Fix __load_masked_{32,64} to properly obey the mask. Fixes issue #28. ...

Fixed the implementations of these builtin functions for targets that don't have native masked load instructions so that they do no loads if the vector mask is all off, and only do an (unaligned) vector load if both the first and last element of the mask are on.  Otherwise they serialize and do scalar loads for only the active lanes.  This fixes a number of potential sources of crashes due to accessing invalid memory.

2011-07-08 11:21:11 +01:00

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