#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "errors.h"
#include "read-md.h"
#include "gensupport.h"

Include dependency graph for genextract.cc:

Data Structures
struct	extraction
struct	code_ptr
class	accum_extract

Macros
#define	ENCODE_PATH_STEP(INDEX, IS_VECTOR)
#define	MISSING_OPERAND_STEP 255
#define	MAX_PATH_INDEX ((MISSING_OPERAND_STEP - 2) / 2)

Typedefs
typedef unsigned char *	locstr

Functions
static void	walk_rtx (md_rtx_info , rtx, class accum_extract )
static void	push_pathstr_operand (int operand, bool is_vector, class accum_extract *acc)
static void	gen_insn (md_rtx_info *info)
static void	VEC_safe_set_locstr (md_rtx_info info, vec< locstr > vp, unsigned int ix, locstr str)
static unsigned char *	VEC_char_to_string (const vec< unsigned char > &v)
static void	add_path (const unsigned char *path)
static void	print_header (void)
static void	print_extractions (void)
int	main (int argc, const char **argv)

Variables
static struct extraction *	extractions
static struct code_ptr *	peepholes
static struct obstack	pathpool
static vec< int >	dupnums

Macro Definition Documentation

◆ ENCODE_PATH_STEP

#define ENCODE_PATH_STEP	(		INDEX,
			IS_VECTOR )

Value:

(2 * (INDEX) + (IS_VECTOR) + 1)

A path is a sequence of steps down a pattern, one byte each.  A step
down XEXP (x, INDEX) is 2 * INDEX + 1 and a step down XVECEXP (x, 0,
INDEX) is 2 * INDEX + 2, which leaves zero free to terminate a path and
MISSING_OPERAND_STEP free to mark an operand number that the pattern
does not use.

Referenced by push_pathstr_operand().

◆ MAX_PATH_INDEX

#define MAX_PATH_INDEX ((MISSING_OPERAND_STEP - 2) / 2)

Referenced by push_pathstr_operand().

◆ MISSING_OPERAND_STEP

#define MISSING_OPERAND_STEP 255

Referenced by add_path(), and print_extractions().

Typedef Documentation

◆ locstr

typedef unsigned char* locstr

Generate code from machine description to extract operands from insn as rtl.
   Copyright (C) 1987-2026 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.

This structure contains all the information needed to describe one
set of extractions methods.  Each method may be used by more than
one pattern if the operands are in the same place.

The string for each operand describes that path to the operand and
contains `0' through `9' when going into an expression and `a' through
`z' then 'A' through to 'Z' when going into a vector.  We assume here that
only the first operand of an rtl expression is a vector.  genrecog.cc makes
the same assumption (and uses the same representation) and it is currently
true.

Function Documentation

◆ add_path()

void add_path ( const unsigned char * path )

static

Add PATH, which is null for an operand number that the pattern skips,
to the path pool.

References add_path(), MISSING_OPERAND_STEP, and pathpool.

Referenced by add_env_var_paths(), add_path(), add_path(), add_standard_paths(), and print_extractions().

◆ gen_insn()

void gen_insn ( md_rtx_info * info )

static

◆ main()

int main	(	int	argc,
		const char **	argv )

References md_rtx_info::def, FATAL_EXIT_CODE, gen_insn(), GET_CODE, have_error, md_rtx_info::index, init_rtx_reader_args(), main(), link::next, peepholes, print_extractions(), print_header(), progname, read_md_rtx(), and SUCCESS_EXIT_CODE.

◆ print_extractions()

void print_extractions ( void )

static

Print the tables that drive insn_extract, and insn_extract itself.

References add_path(), extraction::dup_count, extraction::duplocs, dupnums, extraction::dupnums, extractions, gcc_assert, i, IN_RANGE, extraction::insns, MISSING_OPERAND_STEP, extraction::next, link::next, extraction::op_count, extraction::oplocs, pathpool, peepholes, print_extractions(), UCHAR_MAX, and USHRT_MAX.

Referenced by main(), and print_extractions().

◆ print_header()

void print_header ( void )

static

References print_header().

◆ push_pathstr_operand()

void push_pathstr_operand	(	int	operand,
		bool	is_vector,
		class accum_extract *	acc )

static

Encode the step to OPERAND, a vector element if IS_VECTOR, and push it
onto the end of the path in ACC.

References ENCODE_PATH_STEP, gcc_assert, IN_RANGE, MAX_PATH_INDEX, accum_extract::pathstr, and push_pathstr_operand().

Referenced by gen_insn(), push_pathstr_operand(), and walk_rtx().

◆ VEC_char_to_string()

unsigned char * VEC_char_to_string ( const vec< unsigned char > & v )

static

Another helper subroutine of walk_rtx: given a vec of path steps,
convert it to a zero-terminated path in malloc memory.  No step is
zero, so the result can be handled as a string.

References VEC_char_to_string().

Referenced by VEC_char_to_string(), and walk_rtx().

◆ VEC_safe_set_locstr()

void VEC_safe_set_locstr	(	md_rtx_info *	info,
		vec< locstr > *	vp,
		unsigned int	ix,
		locstr	str )

static

Helper subroutine of walk_rtx: given a vec<locstr>, an index, and a
string, insert the string at the index, which should either already
exist and be NULL, or not yet exist within the vector.  In the latter
case the vector is enlarged as appropriate.  INFO describes the
containing define_* expression.

References have_error, md_rtx_info::loc, message_at(), NULL, and VEC_safe_set_locstr().

Referenced by VEC_safe_set_locstr(), and walk_rtx().

◆ walk_rtx()

void walk_rtx	(	md_rtx_info *	info,
		rtx	x,
		class accum_extract *	acc )

static

Forward declarations.

References accum_extract::duplocs, accum_extract::dupnums, GET_CODE, GET_RTX_FORMAT, GET_RTX_LENGTH, i, MATCH_OPERAND, MATCH_OPERATOR, MATCH_PARALLEL, accum_extract::oplocs, accum_extract::pathstr, push_pathstr_operand(), RTX_CODE, VEC_char_to_string(), VEC_safe_set_locstr(), walk_rtx(), XEXP, XINT, XVECEXP, and XVECLEN.

Referenced by gen_insn(), and walk_rtx().

Variable Documentation

◆ dupnums

vec<int> dupnums

static

The dup numbers of all extraction methods, concatenated.

Referenced by print_extractions().

◆ extractions

struct extraction* extractions

static

All extractions needed for this machine description.

Referenced by gen_insn(), and print_extractions().

◆ pathpool

struct obstack pathpool

static

The paths of all extraction methods, concatenated.  Each path is zero
terminated; the paths of one method are adjacent, operands first and
dups second.

Referenced by add_path(), and print_extractions().

◆ peepholes

struct code_ptr* peepholes

static

All insn codes for old-style peepholes.

Referenced by main(), and print_extractions().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ ENCODE_PATH_STEP

◆ MAX_PATH_INDEX

◆ MISSING_OPERAND_STEP

Typedef Documentation

◆ locstr

Function Documentation

◆ add_path()

◆ gen_insn()

◆ main()

◆ print_extractions()

◆ print_header()

◆ push_pathstr_operand()

◆ VEC_char_to_string()

◆ VEC_safe_set_locstr()

◆ walk_rtx()

Variable Documentation

◆ dupnums

◆ extractions

◆ pathpool

◆ peepholes