On 2020/1/7 5:48, Jim Wilson wrote:
On 1/2/20 7:33 PM, LIU Zhiwei wrote:
+ if (cpu->cfg.vlen > RV_VLEN_MAX) {
+ error_setg(errp,
+ "Vector extension VLEN must <= %d",
RV_VLEN_MAX);
+ return;
There is no architectural maximum for
On 1/2/20 7:33 PM, LIU Zhiwei wrote:
+if (cpu->cfg.vlen > RV_VLEN_MAX) {
+error_setg(errp,
+ "Vector extension VLEN must <= %d", RV_VLEN_MAX);
+return;
There is no architectural maximum for VLEN. This is simply an
implementatio
On 1/3/20 2:33 PM, LIU Zhiwei wrote:
> +if (cpu->cfg.ext_v) {
> +target_misa |= RVV;
> +if (!is_power_of_2(cpu->cfg.vlen)) {
> +error_setg(errp,
> + "Vector extension VLEN must be power of 2");
> +return;
> +
Vector extension is default on only for "any" cpu. It can be turned
on by command line "-cpu rv64,vlen=128,elen=64,vext_spec=v0.7.1".
vlen is the vector register length, default value is 128 bit.
elen is the max operator size in bits, default value is 64 bit.
vext_spec is the vector specification
