On 9/11/19 2:25 AM, liuzhiwei wrote:
> @@ -873,7 +925,12 @@ static riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
> [CSR_FFLAGS] = { fs, read_fflags, write_fflags
> },
> [CSR_FRM] = { fs, read_frm, write_frm
> },
> [CSR_FCSR] = { fs, read_fcsr, write_fcsr
> },
> -
> + /* Vector CSRs */
> + [CSR_VSTART] = { any, read_vstart, write_vstart
> },
> + [CSR_VXSAT] = { any, read_vxsat, write_vxsat
> },
> + [CSR_VXRM] = { any, read_vxrm, write_vxrm
> },
> + [CSR_VL] = { any, read_vl
> },
> + [CSR_VTYPE] = { any, read_vtype
> },
Is there really no MSTATUS bit to disable the vector unit,
as there is for the FPU? That seems like a defect in the
specification if true...
r~
