diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/riscv/vector_helper.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index 908e69d..8ee7717 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -45,9 +45,16 @@ target_ulong HELPER(vsetvl)(CPURISCVState *env, target_ulong s1, xlen - 1 - R_VTYPE_RESERVED_SHIFT); if (lmul & 4) { - /* Fractional LMUL - check LMUL * VLEN >= SEW */ + /* + * Fractional LMUL, check: + * + * VLEN * LMUL >= SEW + * VLEN >> (8 - lmul) >= sew + * (vlenb << 3) >> (8 - lmul) >= sew + * vlenb >> (8 - 3 - lmul) >= sew + */ if (lmul == 4 || - cpu->cfg.vlen >> (8 - lmul) < sew) { + cpu->cfg.vlenb >> (8 - 3 - lmul) < sew) { vill = true; } } |