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> Presumably because it doesn't matter that much, so it isn't worth the investment for Intel. Intel invested in a new instruction set (IA64). AMD did not. The

by nullc 10y ago

> Presumably because it doesn't matter that much, so it isn't worth the investment for Intel. Intel invested in a new instruction set (IA64). AMD did not. The market chose AMD's offering.

pcwalton 10y ago
And the market also chose ARM's AArch64 instruction set, despite the ARM installed base being wider than x86 and a backwards incompatible break from the past. The secret? Supporting both ISAs and switching instruction sets on exceptions. The lesson I take from history is that there is no need to maintain ISA compatibility as long as the old mode is accessible on a process level.
- imtringued 10y ago
  >The secret? Supporting both ISAs and switching instruction sets on exceptions. The secret is that Apple controls their hardware/appstore and android apps are ISA independent.
  - adrianratnapala 10y ago
    Whot? Didn't the AMD64 architecture spank Itanium in the marketplace long before the iPhone became a big deal?