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target/riscv: reg cache entry is initialized before access #1101

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merged 1 commit into from
Aug 16, 2024

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@en-sc en-sc commented Jul 4, 2024

  • Register file examination is separated.
  • Allow to access registers through cache as early as possible to re-use general register access interface and propely track state of the register.
  • Reduces the number of operations: S0 and S1 are saved/restored only when needed (targets without abstract CSR access).

Change-Id: I2e205ae4e88733a5c792f8a35cf30325c68d96b2

@en-sc en-sc requested a review from JanMatCodasip July 4, 2024 18:27
@en-sc en-sc self-assigned this Jul 4, 2024
@en-sc en-sc force-pushed the en-sc/ref-reg-examine branch 2 times, most recently from ac2cf7c to 51ac745 Compare July 4, 2024 18:40
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Just two remarks, otherwise it looks good.

src/target/riscv/riscv-013_reg.c Outdated Show resolved Hide resolved
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Thanks for the patch, I like the improvements.

I have found a few details concerning extra lines for clarity, please, take a look.

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@en-sc en-sc force-pushed the en-sc/ref-reg-examine branch 2 times, most recently from 628683c to 357eafa Compare August 5, 2024 13:50
@en-sc en-sc force-pushed the en-sc/ref-reg-examine branch 4 times, most recently from 9994318 to f7e415f Compare August 9, 2024 12:15
JanMatCodasip
JanMatCodasip previously approved these changes Aug 14, 2024
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JanMatCodasip commented Aug 14, 2024

@MarekVCodasip Please, don't forget to close your review threads if you are fine with the resolution - thanks. ;-)

* Register file examination is separated.
* Allow to access registers through cache as early as possible to re-use
  general register access interface and propely track state of the
  register.
* Reduces the number of operations: S0 and S1 are saved/restored only
  when needed (targets without abstract CSR access).

Change-Id: I2e205ae4e88733a5c792f8a35cf30325c68d96b2
Signed-off-by: Evgeniy Naydanov <[email protected]>
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@MarekVCodasip MarekVCodasip left a comment

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LGTM

@en-sc en-sc merged commit e4d6885 into riscv-collab:riscv Aug 16, 2024
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@en-sc en-sc deleted the en-sc/ref-reg-examine branch August 16, 2024 14:05
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4 participants