ARM Thumb-2 has a higher code density than RISC-V(RV32IMAC req. ~18% more text)

Re:ARM Thumb-2 has a higher code density than RISC-V(RV32IMA... by therealcamino on Thursday October 13, 2022 @09:49PM (#33198752)

I was not being critical of RISC-V, or dismissing it. I was saying that performance is the metric end users care about, and that HN commenters spend too much time arguing endlessly about the code density metric.

I don't understand your final paragraph even a little bit. It's a bit odd.

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Re:ARM Thumb-2 has a higher code density than RISC-V(RV32IMA... by snvzz on Thursday October 13, 2022 @10:16PM (#33198890)

Code density and performance go hand in hand.

Higher code density means higher likeliness that performance-critical code will fit in L1$.

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Re:ARM Thumb-2 has a higher code density than RISC-V(RV32IMA... by therealcamino on Friday October 14, 2022 @08:46AM (#33202802)

Code density is one factor in a tremendously complex system. The entire design philosophy of RISC architectures for the last 35+ years is predicated on the notion that it's not the most important one, and shouldn't be focused on in isolation.

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Re:ARM Thumb-2 has a higher code density than RISC-V(RV32IMA... by snvzz on Friday October 14, 2022 @05:47PM (#33209207)

The RISC paper was all about the need to strongly justify any complexity. I don't quite remember it even touching code density.

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Re:ARM Thumb-2 has a higher code density than RISC-V(RV32IMA... by therealcamino on Tuesday October 18, 2022 @12:49PM (#33250319)

From the abstract of the RISC-1 paper: "Although instructions are simpler, the average length of programs was found not to exceed programs for DEC VAX 11 by more than a factor of 2."

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