bit.ptr_wflip

Complexity 3w@ (actually a bit smaller, 3w@+3w)
Effectively:  wflip *ptr, value
ptr is a bit[:w] that holds an address, which we assume is w-aligned.

Signature

def ptr_wflip ptr, value { ... }

Defined in bit/pointers.fj — lines 109–112 (view on GitHub).

Requires init

The following must be initialised before this macro is invoked:

• bit.pointers.ptr_init

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

• bit.pointers.set_flip_pointer

Used by

• bit.ptr_wflip_2nd_word

Example uses

• bit.ptr_wflip_2nd_word in bit/pointers.fj

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