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Added CSRRWI support

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This commit is contained in:
Valentin Haudiquet
2023-10-11 21:58:44 +02:00
parent 7fbfae1081
commit 9742c89270
1 changed files with 4 additions and 1 deletions
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5
src/cpu/rv32cpu.c
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@@ -559,7 +559,10 @@ static void cpu_execute(rv32_cpu_t* cpu, instruction_t* instruction)
fprintf(stderr, "CSRRC\n"); fprintf(stderr, "CSRRC\n");
break; break;
case FUNC3_CSRRWI: case FUNC3_CSRRWI:
fprintf(stderr, "CSRRWI\n"); // CSR atomic Read/Write Immediate (immediate in rs1)
uint32_t csrrwi_old_value = cpu->csr[instruction->immediate];
cpu->csr[instruction->immediate] = instruction->rs1;
cpu->regs.x[instruction->rd] = csrrwi_old_value;
break; break;
case FUNC3_CSRRSI: case FUNC3_CSRRSI:
fprintf(stderr, "CSRRSI\n"); fprintf(stderr, "CSRRSI\n");