bit.xor_to_ptr

Effectively:  bit.xor *ptr, bit
ptr is a bit[:w] that holds an address, which we assume is dw-aligned.

Signature

def xor_to_ptr ptr, bit @ end { ... }

Defined in bit/pointers.fj — lines 98–102 (view on GitHub).

Complexity

• Time: 2w@ + 2@+2

• Space: 2w@ + 2@+2

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

Requires init

The following must be initialised before this macro is invoked:

• bit.pointers.ptr_init

Source

Click to view the macro body

def xor_to_ptr ptr, bit @ end {
    .if0 bit, end
    .ptr_flip_dbit ptr
  end:
}

Depends on

• bit.if0/2

• bit.ptr_flip_dbit

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