Revert "move things around"

This reverts commit 23f99977a6f196de3da0b7c851e0dbeabaf9c5e3.
Revert "removing stack trace header"

This reverts commit 60983a27066c70b305ff8c522733a73712230e20.
Revert "forcing word size in computeImmediateSize if opSz is word"

This reverts commit b6be65b5dbd4b5e74e75876d2a0c265366c212e7.
Revert "print stack trace if opSz is word"

This reverts commit 01cf493c3a088eeb04f893aa2445b92a332b66c5.