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I find it funny itanium was killed off just before the big ai boom. The core flaw of vliw archs (being able to infer how instructions should be packed most efficiently) seems like an easily solvable problem in the wake of machine learning being funded like crazy
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Just found out that the Elbrus microprocessor series some of which used in personal/consumer devices not only use a VLIW(Very Long Instruction Word) 512 bit ISA but ALSO implement x86 and x86-64. I do not think I will ever be able to comprehend the decision making that went into this.
On Improving Performance and Energy Efficiency for Register-File Connected Clustered VLIW Architectures for Embedded System Usage
<span class=”paragraphSection”><div class=”boxTitle”>Abstract</div>Traditionally, the register allocation phase for clustered very long instruction words (VLIW) architecture is implemented independently from instruction scheduling and cluster assignment. However, independently performing register allocation, scheduling and cluster assignment could have negative effect on the other phases. The research of this paper is focused on register-file connected clustered VLIW (RFCC VLIW) architecture. In RFCC VLIW architecture, the number of access ports to the global register file from each cluster and the number of registers in the global register file are both limited, due to the consideration of limited chip area of embedded systems. Thus, the distribution of inter-cluster data transferring must be carefully arranged; otherwise, there will be conflicts, which harm the performance and energy consumption. This paper proposes an algorithm to take register pressure into consideration while performing instruction scheduling and cluster assignment, so as to optimize performance and energy for embedded systems with RFCC VLIW architecture. The result shows that our algorithm can significantly reduce the penalty of performance and energy consumption due to register pressure of global register file.</span> Source: Oxford Journals
On Improving Performance and Energy Efficiency for Register-File Connected Clustered VLIW Architectures for Embedded System Usage was originally published on Computer Guru
On Improving Performance and Energy Efficiency for Register-File Connected Clustered VLIW Architectures for Embedded System Usage
Traditionally, the register allocation phase for clustered very long instruction words (VLIW) architecture is implemented independently from instruction scheduling and cluster assignment. However, independently performing register allocation, scheduling and cluster assignment could have negative effect on the other phases. The research of this paper is focused on register-file connected clustered VLIW (RFCC VLIW) architecture. In RFCC VLIW architecture, the number of access ports to the global register file from each cluster and the number of registers in the global register file are both limited, due to the consideration of limited chip area of embedded systems. Thus, the distribution of inter-cluster data transferring must be carefully arranged; otherwise, there will be conflicts, which harm the performance and energy consumption. This paper proposes an algorithm to take register pressure into consideration while performing instruction scheduling and cluster assignment, so as to optimize performance and energy for embedded systems with RFCC VLIW architecture. The result shows that our algorithm can significantly reduce the penalty of performance and energy consumption due to register pressure of global register file.
Source: Oxford Journals
On Improving Performance and Energy Efficiency for Register-File Connected Clustered VLIW Architectures for Embedded System Usage was originally published on Computer Guru
Some instruction words are just way too fucking long.
Silicon Mali
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