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lib: sbi: Enhance CSR Handling in system_opcode_insn

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- Completed TODO in `system_opcode_insn` to ensure CSR read/write
  instruction handling.
- Refactored to use new macros `GET_RS1_NUM` and `GET_CSR_NUM`.
- Updated `GET_RM` macro and replaced hardcoded funct3 values with
  constants (`CSRRW`, `CSRRS`, `CSRRC`, etc.).
- Removed redundant `GET_RM` from `riscv_fp.h`.
- Improved validation and error handling for CSR instructions.

This patch enhances the clarity and correctness of CSR handling
in `system_opcode_insn`.

Signed-off-by: Dongdong Zhang <zhangdongdong@eswincomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Dongdong Zhang
2024-07-18 13:43:57 +08:00
committed by Anup Patel
parent b9c091ed89
commit d4322eebd0
3 changed files with 41 additions and 16 deletions
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1
include/sbi/riscv_fp.h
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@@ -15,7 +15,6 @@
#include <sbi/sbi_types.h>
#define GET_PRECISION(insn) (((insn) >> 25) & 3)
#define GET_RM(insn) (((insn) >> 12) & 7)
#define PRECISION_S 0
#define PRECISION_D 1