4 ms·
Never heard about reading the masked area. Source?
by IWeldMelons 2y ago
Never heard about reading the masked area. Source?
- dzaima 2y agoAMD64 manual volume 4 (https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/programmer-references/26568.pdf https://www.amd.com/content/dam/amd/en/documents/processor-t...): > Exception and trap behavior for elements not selected for loading or storing from/to memory is implementation dependent. For instance, a given implementation may signal a data breakpoint or a page fault for doublewords that are zero-masked and not actually written.
- IWeldMelons 2y agoI wonder if it ever happens IRL, as this would severely restrict the usefulness. EDIT: does not seem to be applicable to AVX-512, only to AVX 1. According to this PDF by intel, AVX-512 suppresses faults for masked access. https://gcc.gnu.org/wiki/cauldron2014?action=AttachFile&do=get&target=Cauldron14_AVX-512_Vector_ISA_Kirill_Yukhin_20140711.pdf https://gcc.gnu.org/wiki/cauldron2014?action=AttachFile&do=g...