1 files changed, 3 insertions, 4 deletions
diff --git a/riscv/insns/vmulhu_vv.h b/riscv/insns/vmulhu_vv.h
index 4aff1a2..46e5d46 100644
--- a/riscv/insns/vmulhu_vv.h
+++ b/riscv/insns/vmulhu_vv.h
@@ -1,11 +1,10 @@
 // vmulhu: Unsigned multiply, returning high bits of product
 require(STATE.VU.ELEN <= 32);
 reg_t vsew = STATE.VU.vsew;
-uint64_t sew_result_bits = vsew * 2;
-uint64_t upper_mask = 1 - ((1 << vsew) - 1);
+uint64_t lo_mask = (((uint64_t)1 << vsew) - 1);
 
 VI_VV_LOOP
 ({
-    uint64_t result = vs1 * vs2;
-    vd = (result>>(sew_result_bits - sew)) & upper_mask;
+    uint64_t result = (uint64_t)vs1 * (uint64_t)vs2;
+    vd = (result >> sew) & lo_mask;
 })