hex.ptr_wflip

Effectively:  wflip *ptr, value
ptr is a hex[:w/4] that holds an address, which we assume is w-aligned.

Signature

def ptr_wflip ptr, value { ... }

Defined in hex/pointers/xor_to_pointer.fj — lines 154–157 (view on GitHub).

Complexity

• Time: w(1.5@+5)

• Space: w(1.5@+17)

See the complexity glossary for what @, w, dw, dbit, n mean.

Source

Click to view the macro body

def ptr_wflip ptr, value {
    .pointers.set_flip_pointer ptr
    rep(w, i) .pointers.advance_by_one_and_flip__ptr_wflip (#(i^((i+1)%w))), (value>>i)&1
}

Depends on

• hex.pointers.set_flip_pointer

Used by

• hex.ptr_wflip_2nd_word

Example uses

• hex.ptr_wflip_2nd_word in hex/pointers/xor_to_pointer.fj

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