Inheritance diagram for compare_by_pieces_d:

Collaboration diagram for compare_by_pieces_d:

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Public Member Functions
	compare_by_pieces_d (rtx op0, rtx op1, by_pieces_constfn op1_cfn, void op1_cfn_data, HOST_WIDE_INT len, int align, rtx_code_label fail_label)

void	run ()

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

void	finish_mode (machine_mode) 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
rtx_code_label *	m_fail_label

rtx	m_accumulator

int	m_count

int	m_batch

Detailed Description

Context used by compare_by_pieces_genfn.  It stores the fail label
to jump to in case of miscomparison, and for branch ratios greater than 1,
it stores an accumulator and the current and maximum counts before
emitting another branch.

Constructor & Destructor Documentation

◆ compare_by_pieces_d()

compare_by_pieces_d::compare_by_pieces_d	(	rtx	op0,
		rtx	op1,
		by_pieces_constfn	op1_cfn,
		void *	op1_cfn_data,
		HOST_WIDE_INT	len,
		int	align,
		rtx_code_label *	fail_label )

inline

References fail_label, and m_fail_label.

Member Function Documentation

◆ finish_mode()

void compare_by_pieces_d::finish_mode ( machine_mode mode )

finaloverrideprivatevirtual

Called after expanding a series of comparisons in MODE.  If we have
accumulated results for which we haven't emitted a branch yet, do
so now.

Reimplemented from op_by_pieces_d.

References const0_rtx, do_compare_rtx_and_jump(), m_accumulator, m_fail_label, NULL, NULL_RTX, and profile_probability::uninitialized().

◆ generate()

void compare_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.  DATA holds a pointer to the compare_by_pieces_data
context structure.

Implements op_by_pieces_d.

References const0_rtx, do_compare_rtx_and_jump(), expand_binop(), m_accumulator, m_batch, m_count, m_fail_label, NULL, NULL_RTX, OPTAB_LIB_WIDEN, and profile_probability::uninitialized().

◆ 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 compare_by_pieces_d::prepare_mode	(	machine_mode	mode,
		unsigned int	align )

finaloverrideprivatevirtual

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

Implements op_by_pieces_d.

References can_compare_p(), ccp_jump, GET_MODE_ALIGNMENT, m_accumulator, m_batch, m_count, NULL_RTX, optab_handler(), and targetm.

◆ 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(), by_pieces_prev::data, op_by_pieces_d::finish_mode(), generate(), GET_MODE_SIZE(), op_by_pieces_d::get_usable_mode(), 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(), by_pieces_prev::mode, 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(), is_a(), op_by_pieces_d::m_len, op_by_pieces_d::m_op, opt_mode< T >::require(), and smallest_int_mode_for_size().

Referenced by op_by_pieces_d::run().

Field Documentation

◆ m_accumulator

rtx compare_by_pieces_d::m_accumulator

private

Referenced by finish_mode(), generate(), and prepare_mode().

◆ 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_batch

int compare_by_pieces_d::m_batch

private

Referenced by generate(), and prepare_mode().

◆ m_count

int compare_by_pieces_d::m_count

private

Referenced by generate(), and prepare_mode().

◆ m_fail_label

rtx_code_label* compare_by_pieces_d::m_fail_label

private

Referenced by compare_by_pieces_d(), finish_mode(), and generate().

◆ 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_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 move_by_pieces_d::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 move_by_pieces_d::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 move_by_pieces_d::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

Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ compare_by_pieces_d()

Member Function Documentation

◆ finish_mode()

◆ generate()

◆ get_usable_mode()

◆ prepare_mode()

◆ run()

◆ smallest_fixed_size_mode_for_size()

Field Documentation

◆ m_accumulator

◆ m_align

◆ m_batch

◆ m_count

◆ m_fail_label

◆ m_from

◆ m_len

◆ m_max_size

◆ m_offset

◆ m_op

◆ m_overlap_op_by_pieces

◆ m_push

◆ m_reverse

◆ m_to