Why Doesn't Intel Expose the Internal RISC Core to Programmers?
Hello everyone, starting with the Pentium Pro processor, Intel introduced a microarchitecture that translated x86 instructions into micro-operations (uops) executed by an internal RISC core right, so that there is significant performance improvements while maintaining compatibility with existing software.
I know the reasoning behind using a hidden RISC core is clear but why not expose the RISC instruction set directly to programmers? This could potentially lead to further performance gains and a smoother transition away from the x86 instruction set in the future. I understand that maintaining backward compatibility is crucial, yes. Since Intel is already committed to supporting legacy x86 modes alongside 64-bit operation, wouldn't exposing the RISC core allow for a more natural path towards a future RISC-based architecture?
It seems that Intel continues to extend the x86 instruction set with new extensions like AVX and SSE. Is there a specific reason for not leveraging the internal RISC core more directly?
I know the reasoning behind using a hidden RISC core is clear but why not expose the RISC instruction set directly to programmers? This could potentially lead to further performance gains and a smoother transition away from the x86 instruction set in the future. I understand that maintaining backward compatibility is crucial, yes. Since Intel is already committed to supporting legacy x86 modes alongside 64-bit operation, wouldn't exposing the RISC core allow for a more natural path towards a future RISC-based architecture?
It seems that Intel continues to extend the x86 instruction set with new extensions like AVX and SSE. Is there a specific reason for not leveraging the internal RISC core more directly?
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