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TBH, Intel ISAs have never been very stable, the mixed AVX flavors are just the latest examples.
by bobmcnamara 2y ago
TBH, Intel ISAs have never been very stable, the mixed AVX flavors are just the latest examples.
- gauge_field 2y agoYeah, it so fast that AMD is not even able to catchup and that many of the extensions is available only on Intel CPUs. As far as I could tell, it is only unstable in the sense of being fast and having many features. I dont see any breaking for my code using cpuid to detect avx512 features.
- bobmcnamara 2y agoNo, I mean things like when they removed BCD support, or when they removed simultaneous 16-bit ISA when they added 64-bit. Or the bit string instructions. Or moving the cmpxchg encoding across chip revisions.