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by amluto
1551 days ago
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It’s a funny register: you don’t want to read it (and before Ivy Bridge, user code couldn’t read it). The base is added by the CPU when you dereference the pointer. So code like: __thread int array[100];
array[n] += 5:
Effectively computes the offset portion of array+n and then, using CPU assistance, accesses that memory relative to the segment. |
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