Re: [RFC v2 21/76] target/riscv: rvv-0.9: configure instructions

[Richard Henderson]

On 7/22/20 2:15 AM, frank.ch...@sifive.com wrote:
> +    float vflmul = flmul_table[lmul];
> +
> +    if ((sew > cpu->cfg.elen)
> +        || vill
> +        || vflmul < ((float)sew / cpu->cfg.elen)

Hmm.  I suppose this is fairly compact.

Expanding this to integer code would take something like

    if (vflmul & 4) {
        /* Fractional LMUL. */
        if (vflmul == 4 ||
            cpu->cfg.elen >> (8 - vflmul) < sew) {
            vill = 1;
        }
    }


r~