[GitHub] [nuttx] no1wudi opened a new pull request, #8928: tools/riscv: Map extensions to certain cpu model for LLVM based toolc…

["no1wudi (via GitHub)" <gi...@apache.org>]

no1wudi opened a new pull request, #8928:
URL: https://github.com/apache/nuttx/pull/8928

   
   
   ## Summary
   
   RISCV has a modular instruction set. It's hard to define cpu-model to support all toolchain.
   
   For Zig, cpu model is this formal: generic_rv[32|64][i][m][a][f][d][c]
   
   For Rust, cpu model is this formal: riscv[32|64][i][m][a][f][d][c]
   
   
   So, it's better to map the NuttX config to LLVM builtin cpu model, these models supported by all LLVM based toolchain.
   
   Refer to : https://github.com/llvm/llvm-project/blob/release/15.x/llvm/lib/Target/RISCV/RISCV.td
   
   These models can't cover all implementation of RISCV, but it's enough for most cases (All NuttX supported chips).
   
   ## Impact
   non-c compiler only
   ## Testing
   CI and local machine
   


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[GitHub] [nuttx] acassis merged pull request #8928: tools/riscv: Map extensions to certain cpu model for LLVM based toolc…

["acassis (via GitHub)" <gi...@apache.org>]

acassis merged PR #8928:
URL: https://github.com/apache/nuttx/pull/8928


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