On Thu, Sep 12, 2019 at 6:39 AM Richard Henderson < richard.hender...@linaro.org> wrote:
> On 9/11/19 10:51 AM, Chih-Min Chao wrote: > > Could the VLEN be configurable in cpu initialization but not fixed in > > compilation phase ? > > Take the integer element as example and the difference should be the > > stride of vfp.vreg[x] isn't continuous > > Do you really want an unbounded amount of vector register storage? Hi Richard, VLEN is implementation-defined parameter and the only limitation on spec is that it must be power of 2. What I prefer is the value could be adjustable in runtime. > > > uint8_t *mem = malloc(size) > > for (int idx = 0; idx < 32; ++idx) { > > vfp.vreg[idx].u64 = (void *)&mem[idx * elem]; > > vfp.vreg[idx].u32 = (void *)&mem[idx * elem]; > > vfp.vreg[idx].u16 = (void *)&mem[idx * elem]; > > } > > This isn't adjusting the stride of the elements. And in any case this > would > have to be re-adjusted for every vsetvl. > > Not sure about the relation with vsetvl. Could you provide an example ? Chih-Min > > r~ >