deps/v8/benchmarks/crypto.js
function bnpClamp() {
  var this_array = this.array;
  var c = this.s&BI_DM;
  while(this.t > 0 && this_array[this.t-1] == c) --this.t;
}
function bnpClamp() {
  var this_array = this.array;
  var c = this.s&BI_DM;
  while(this.t > 0 && this_array[this.t-1] == c) --this.t;
}
(protected) clamp off excess high words