move_by_pieces_d Class Reference

Inheritance diagram for move_by_pieces_d:

Collaboration diagram for move_by_pieces_d:

Public Member Functions
	move_by_pieces_d (rtx to, rtx from, unsigned HOST_WIDE_INT len, unsigned int align)
rtx	finish_retmode (memop_ret)
void	run ()

Protected Member Functions
virtual void	finish_mode (machine_mode)

Protected Attributes
pieces_addr	m_to
pieces_addr	m_from
const unsigned HOST_WIDE_INT	m_len
HOST_WIDE_INT	m_offset
unsigned int	m_align
unsigned int	m_max_size
bool	m_reverse
bool	m_push
bool	m_overlap_op_by_pieces
by_pieces_operation	m_op

Private Member Functions
void	generate (rtx, rtx, machine_mode) final override
bool	prepare_mode (machine_mode, unsigned int) final override
fixed_size_mode	get_usable_mode (fixed_size_mode, unsigned int)
fixed_size_mode	smallest_fixed_size_mode_for_size (unsigned int)

Private Attributes
insn_gen_fn	m_gen_fun

Constructor & Destructor Documentation

move_by_pieces_d()

move_by_pieces_d::move_by_pieces_d ( rtx to, rtx from, unsigned HOST_WIDE_INT len, unsigned int align )

inline

Member Function Documentation

finish_mode()

virtual void op_by_pieces_d::finish_mode ( machine_mode )

inlineprotectedvirtualinherited

Reimplemented in compare_by_pieces_d.

Referenced by op_by_pieces_d::run().

finish_retmode()

rtx move_by_pieces_d::finish_retmode

(

memop_ret

retmode

)

Perform the final adjustment at the end of a string to obtain the
correct return value for the block operation.
Return value is based on RETMODE argument.   

References pieces_addr::adjust(), gcc_assert, ggc_alloc(), op_by_pieces_d::m_offset, op_by_pieces_d::m_reverse, op_by_pieces_d::m_to, pieces_addr::maybe_postinc(), and RETURN_END_MINUS_ONE.

generate()

void move_by_pieces_d::generate ( rtx op0, rtx op1, machine_mode mode )

finaloverrideprivatevirtual

A callback used when iterating for a compare_by_pieces_operation.
OP0 and OP1 are the values that have been loaded and should be
compared in MODE.  If OP0 is NULL, this means we should generate a
push; otherwise EXTRA_DATA holds a pointer to a pointer to the insn
gen function that should be used to generate the mode.   

Implements op_by_pieces_d.

References emit_insn(), ggc_alloc(), m_gen_fun, NULL, and NULL_RTX.

get_usable_mode()

fixed_size_mode op_by_pieces_d::get_usable_mode ( fixed_size_mode mode, unsigned int len )

privateinherited

This function returns the largest usable integer mode for LEN bytes
whose size is no bigger than size of MODE.   

References GET_MODE_SIZE(), op_by_pieces_d::m_align, op_by_pieces_d::m_op, op_by_pieces_d::prepare_mode(), and widest_fixed_size_mode_for_size().

Referenced by op_by_pieces_d::run().

prepare_mode()

bool move_by_pieces_d::prepare_mode ( machine_mode mode, unsigned int align )

finaloverrideprivatevirtual

Return true if MODE can be used for a set of copies, given an
alignment ALIGN.  Prepare whatever data is necessary for later
calls to generate.   

Implements op_by_pieces_d.

References GET_MODE_ALIGNMENT, ggc_alloc(), m_gen_fun, and optab_handler().

run()

void op_by_pieces_d::run ( )

inherited

This function contains the main loop used for expanding a block
operation.  First move what we can in the largest integer mode,
then go to successively smaller modes.  For every access, call
GENFUN with the two operands and the EXTRA_DATA.   

References pieces_addr::adjust(), op_by_pieces_d::finish_mode(), generate(), GET_MODE_SIZE(), op_by_pieces_d::get_usable_mode(), ggc_alloc(), op_by_pieces_d::m_from, op_by_pieces_d::m_len, op_by_pieces_d::m_max_size, op_by_pieces_d::m_offset, op_by_pieces_d::m_op, op_by_pieces_d::m_overlap_op_by_pieces, op_by_pieces_d::m_push, op_by_pieces_d::m_reverse, op_by_pieces_d::m_to, pieces_addr::maybe_postinc(), pieces_addr::maybe_predec(), NULL_RTX, op_by_pieces_d::smallest_fixed_size_mode_for_size(), and widest_fixed_size_mode_for_size().

smallest_fixed_size_mode_for_size()

fixed_size_mode op_by_pieces_d::smallest_fixed_size_mode_for_size ( unsigned int size )

privateinherited

Return the smallest integer or QI vector mode that is not narrower
than SIZE bytes.   

References by_pieces_mode_supported_p(), can_use_qi_vectors(), candidate(), FOR_EACH_MODE_IN_CLASS, GET_MODE_INNER, GET_MODE_SIZE(), ggc_alloc(), op_by_pieces_d::m_len, op_by_pieces_d::m_op, and smallest_int_mode_for_size().

Referenced by op_by_pieces_d::run().

Field Documentation

m_align

unsigned int op_by_pieces_d::m_align

protectedinherited

Referenced by op_by_pieces_d::get_usable_mode(), and op_by_pieces_d::op_by_pieces_d().

m_from

pieces_addr op_by_pieces_d::m_from

protectedinherited

Referenced by op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

m_gen_fun

insn_gen_fn move_by_pieces_d::m_gen_fun

private

Referenced by generate(), and prepare_mode().

m_len

const unsigned HOST_WIDE_INT op_by_pieces_d::m_len

protectedinherited

Referenced by op_by_pieces_d::run(), and op_by_pieces_d::smallest_fixed_size_mode_for_size().

m_max_size

unsigned int op_by_pieces_d::m_max_size

protectedinherited

Referenced by op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

m_offset

HOST_WIDE_INT op_by_pieces_d::m_offset

protectedinherited

Referenced by finish_retmode(), store_by_pieces_d::finish_retmode(), op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

m_op

by_pieces_operation op_by_pieces_d::m_op

protectedinherited

Referenced by op_by_pieces_d::get_usable_mode(), op_by_pieces_d::op_by_pieces_d(), op_by_pieces_d::run(), and op_by_pieces_d::smallest_fixed_size_mode_for_size().

m_overlap_op_by_pieces

bool op_by_pieces_d::m_overlap_op_by_pieces

protectedinherited

Referenced by op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

m_push

bool op_by_pieces_d::m_push

protectedinherited

Referenced by op_by_pieces_d::run().

m_reverse

bool op_by_pieces_d::m_reverse

protectedinherited

Referenced by finish_retmode(), store_by_pieces_d::finish_retmode(), op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

m_to

pieces_addr op_by_pieces_d::m_to

protectedinherited

Referenced by finish_retmode(), store_by_pieces_d::finish_retmode(), op_by_pieces_d::op_by_pieces_d(), and op_by_pieces_d::run().

---

The documentation for this class was generated from the following file:

• expr.cc