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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/rtl.def')
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1 files changed, 0 insertions, 1218 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/rtl.def b/gcc-4.2.1-5666.3/gcc/rtl.def deleted file mode 100644 index 06e11a06c..000000000 --- a/gcc-4.2.1-5666.3/gcc/rtl.def +++ /dev/null @@ -1,1218 +0,0 @@ -/* This file contains the definitions and documentation for the - Register Transfer Expressions (rtx's) that make up the - Register Transfer Language (rtl) used in the Back End of the GNU compiler. - Copyright (C) 1987, 1988, 1992, 1994, 1995, 1997, 1998, 1999, 2000, 2004, - 2005, 2006 - 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 2, 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 COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - - -/* Expression definitions and descriptions for all targets are in this file. - Some will not be used for some targets. - - The fields in the cpp macro call "DEF_RTL_EXPR()" - are used to create declarations in the C source of the compiler. - - The fields are: - - 1. The internal name of the rtx used in the C source. - It is a tag in the enumeration "enum rtx_code" defined in "rtl.h". - By convention these are in UPPER_CASE. - - 2. The name of the rtx in the external ASCII format read by - read_rtx(), and printed by print_rtx(). - These names are stored in rtx_name[]. - By convention these are the internal (field 1) names in lower_case. - - 3. The print format, and type of each rtx->u.fld[] (field) in this rtx. - These formats are stored in rtx_format[]. - The meaning of the formats is documented in front of this array in rtl.c - - 4. The class of the rtx. These are stored in rtx_class and are accessed - via the GET_RTX_CLASS macro. They are defined as follows: - - RTX_CONST_OBJ - an rtx code that can be used to represent a constant object - (e.g, CONST_INT) - RTX_OBJ - an rtx code that can be used to represent an object (e.g, REG, MEM) - RTX_COMPARE - an rtx code for a comparison (e.g, LT, GT) - RTX_COMM_COMPARE - an rtx code for a commutative comparison (e.g, EQ, NE, ORDERED) - RTX_UNARY - an rtx code for a unary arithmetic expression (e.g, NEG, NOT) - RTX_COMM_ARITH - an rtx code for a commutative binary operation (e.g,, PLUS, MULT) - RTX_TERNARY - an rtx code for a non-bitfield three input operation (IF_THEN_ELSE) - RTX_BIN_ARITH - an rtx code for a non-commutative binary operation (e.g., MINUS, DIV) - RTX_BITFIELD_OPS - an rtx code for a bit-field operation (ZERO_EXTRACT, SIGN_EXTRACT) - RTX_INSN - an rtx code for a machine insn (INSN, JUMP_INSN, CALL_INSN) - RTX_MATCH - an rtx code for something that matches in insns (e.g, MATCH_DUP) - RTX_AUTOINC - an rtx code for autoincrement addressing modes (e.g. POST_DEC) - RTX_EXTRA - everything else - - All of the expressions that appear only in machine descriptions, - not in RTL used by the compiler itself, are at the end of the file. */ - -/* Unknown, or no such operation; the enumeration constant should have - value zero. */ -DEF_RTL_EXPR(UNKNOWN, "UnKnown", "*", RTX_EXTRA) - -/* --------------------------------------------------------------------- - Expressions used in constructing lists. - --------------------------------------------------------------------- */ - -/* a linked list of expressions */ -DEF_RTL_EXPR(EXPR_LIST, "expr_list", "ee", RTX_EXTRA) - -/* a linked list of instructions. - The insns are represented in print by their uids. */ -DEF_RTL_EXPR(INSN_LIST, "insn_list", "ue", RTX_EXTRA) - -/* a linked list of dependencies. - The insns are represented in print by their uids. - Operand 2 is the status of a dependence (see sched-int.h for more). */ -DEF_RTL_EXPR(DEPS_LIST, "deps_list", "uei", RTX_EXTRA) - -/* SEQUENCE appears in the result of a `gen_...' function - for a DEFINE_EXPAND that wants to make several insns. - Its elements are the bodies of the insns that should be made. - `emit_insn' takes the SEQUENCE apart and makes separate insns. */ -DEF_RTL_EXPR(SEQUENCE, "sequence", "E", RTX_EXTRA) - -/* Refers to the address of its argument. This is only used in alias.c. */ -DEF_RTL_EXPR(ADDRESS, "address", "e", RTX_MATCH) - -/* ---------------------------------------------------------------------- - Expression types used for things in the instruction chain. - - All formats must start with "iuu" to handle the chain. - Each insn expression holds an rtl instruction and its semantics - during back-end processing. - See macros's in "rtl.h" for the meaning of each rtx->u.fld[]. - - ---------------------------------------------------------------------- */ - -/* An instruction that cannot jump. */ -DEF_RTL_EXPR(INSN, "insn", "iuuBieiee", RTX_INSN) - -/* An instruction that can possibly jump. - Fields ( rtx->u.fld[] ) have exact same meaning as INSN's. */ -DEF_RTL_EXPR(JUMP_INSN, "jump_insn", "iuuBieiee0", RTX_INSN) - -/* An instruction that can possibly call a subroutine - but which will not change which instruction comes next - in the current function. - Field ( rtx->u.fld[9] ) is CALL_INSN_FUNCTION_USAGE. - All other fields ( rtx->u.fld[] ) have exact same meaning as INSN's. */ -DEF_RTL_EXPR(CALL_INSN, "call_insn", "iuuBieieee", RTX_INSN) - -/* A marker that indicates that control will not flow through. */ -DEF_RTL_EXPR(BARRIER, "barrier", "iuu000000", RTX_EXTRA) - -/* Holds a label that is followed by instructions. - Operand: - 4: is used in jump.c for the use-count of the label. - 5: is used in flow.c to point to the chain of label_ref's to this label. - 6: is a number that is unique in the entire compilation. - APPLE LOCAL begin for-fsf-4_4 3274130 5295549 - 7: is the user-given name of the label, if any. - 8: is the alignment of the label, made up of two parts, - LABEL_ALIGNMENT and LABEL_MAX_SKIP. */ -DEF_RTL_EXPR(CODE_LABEL, "code_label", "iuuB00isi", RTX_EXTRA) - -/* APPLE LOCAL end for-fsf-4_4 3274130 5295549 */ \ -#ifdef USE_MAPPED_LOCATION -/* Say where in the code a source line starts, for symbol table's sake. - Operand: - 4: unused if line number > 0, note-specific data otherwise. - 5: line number if > 0, enum note_insn otherwise. - 6: CODE_LABEL_NUMBER if line number == NOTE_INSN_DELETED_LABEL. */ -#else -/* Say where in the code a source line starts, for symbol table's sake. - Operand: - 4: filename, if line number > 0, note-specific data otherwise. - 5: line number if > 0, enum note_insn otherwise. - 6: unique number if line number == note_insn_deleted_label. */ -#endif -DEF_RTL_EXPR(NOTE, "note", "iuuB0ni", RTX_EXTRA) - -/* ---------------------------------------------------------------------- - Top level constituents of INSN, JUMP_INSN and CALL_INSN. - ---------------------------------------------------------------------- */ - -/* Conditionally execute code. - Operand 0 is the condition that if true, the code is executed. - Operand 1 is the code to be executed (typically a SET). - - Semantics are that there are no side effects if the condition - is false. This pattern is created automatically by the if_convert - pass run after reload or by target-specific splitters. */ -DEF_RTL_EXPR(COND_EXEC, "cond_exec", "ee", RTX_EXTRA) - -/* Several operations to be done in parallel (perhaps under COND_EXEC). */ -DEF_RTL_EXPR(PARALLEL, "parallel", "E", RTX_EXTRA) - -/* A string that is passed through to the assembler as input. - One can obviously pass comments through by using the - assembler comment syntax. - These occur in an insn all by themselves as the PATTERN. - They also appear inside an ASM_OPERANDS - as a convenient way to hold a string. */ -DEF_RTL_EXPR(ASM_INPUT, "asm_input", "s", RTX_EXTRA) - -#ifdef USE_MAPPED_LOCATION -/* An assembler instruction with operands. - 1st operand is the instruction template. - 2nd operand is the constraint for the output. - 3rd operand is the number of the output this expression refers to. - When an insn stores more than one value, a separate ASM_OPERANDS - is made for each output; this integer distinguishes them. - 4th is a vector of values of input operands. - 5th is a vector of modes and constraints for the input operands. - Each element is an ASM_INPUT containing a constraint string - and whose mode indicates the mode of the input operand. - 6th is the source line number. */ -DEF_RTL_EXPR(ASM_OPERANDS, "asm_operands", "ssiEEi", RTX_EXTRA) -#else -/* An assembler instruction with operands. - 1st operand is the instruction template. - 2nd operand is the constraint for the output. - 3rd operand is the number of the output this expression refers to. - When an insn stores more than one value, a separate ASM_OPERANDS - is made for each output; this integer distinguishes them. - 4th is a vector of values of input operands. - 5th is a vector of modes and constraints for the input operands. - Each element is an ASM_INPUT containing a constraint string - and whose mode indicates the mode of the input operand. - 6th is the name of the containing source file. - 7th is the source line number. */ -DEF_RTL_EXPR(ASM_OPERANDS, "asm_operands", "ssiEEsi", RTX_EXTRA) -#endif - -/* A machine-specific operation. - 1st operand is a vector of operands being used by the operation so that - any needed reloads can be done. - 2nd operand is a unique value saying which of a number of machine-specific - operations is to be performed. - (Note that the vector must be the first operand because of the way that - genrecog.c record positions within an insn.) - This can occur all by itself in a PATTERN, as a component of a PARALLEL, - or inside an expression. */ -DEF_RTL_EXPR(UNSPEC, "unspec", "Ei", RTX_EXTRA) - -/* Similar, but a volatile operation and one which may trap. */ -DEF_RTL_EXPR(UNSPEC_VOLATILE, "unspec_volatile", "Ei", RTX_EXTRA) - -/* Vector of addresses, stored as full words. */ -/* Each element is a LABEL_REF to a CODE_LABEL whose address we want. */ -DEF_RTL_EXPR(ADDR_VEC, "addr_vec", "E", RTX_EXTRA) - -/* Vector of address differences X0 - BASE, X1 - BASE, ... - First operand is BASE; the vector contains the X's. - The machine mode of this rtx says how much space to leave - for each difference and is adjusted by branch shortening if - CASE_VECTOR_SHORTEN_MODE is defined. - The third and fourth operands store the target labels with the - minimum and maximum addresses respectively. - The fifth operand stores flags for use by branch shortening. - Set at the start of shorten_branches: - min_align: the minimum alignment for any of the target labels. - base_after_vec: true iff BASE is after the ADDR_DIFF_VEC. - min_after_vec: true iff minimum addr target label is after the ADDR_DIFF_VEC. - max_after_vec: true iff maximum addr target label is after the ADDR_DIFF_VEC. - min_after_base: true iff minimum address target label is after BASE. - max_after_base: true iff maximum address target label is after BASE. - Set by the actual branch shortening process: - offset_unsigned: true iff offsets have to be treated as unsigned. - scale: scaling that is necessary to make offsets fit into the mode. - - The third, fourth and fifth operands are only valid when - CASE_VECTOR_SHORTEN_MODE is defined, and only in an optimizing - compilations. */ - -DEF_RTL_EXPR(ADDR_DIFF_VEC, "addr_diff_vec", "eEee0", RTX_EXTRA) - -/* Memory prefetch, with attributes supported on some targets. - Operand 1 is the address of the memory to fetch. - Operand 2 is 1 for a write access, 0 otherwise. - Operand 3 is the level of temporal locality; 0 means there is no - temporal locality and 1, 2, and 3 are for increasing levels of temporal - locality. - - The attributes specified by operands 2 and 3 are ignored for targets - whose prefetch instructions do not support them. */ -DEF_RTL_EXPR(PREFETCH, "prefetch", "eee", RTX_EXTRA) - -/* ---------------------------------------------------------------------- - At the top level of an instruction (perhaps under PARALLEL). - ---------------------------------------------------------------------- */ - -/* Assignment. - Operand 1 is the location (REG, MEM, PC, CC0 or whatever) assigned to. - Operand 2 is the value stored there. - ALL assignment must use SET. - Instructions that do multiple assignments must use multiple SET, - under PARALLEL. */ -DEF_RTL_EXPR(SET, "set", "ee", RTX_EXTRA) - -/* Indicate something is used in a way that we don't want to explain. - For example, subroutine calls will use the register - in which the static chain is passed. */ -DEF_RTL_EXPR(USE, "use", "e", RTX_EXTRA) - -/* Indicate something is clobbered in a way that we don't want to explain. - For example, subroutine calls will clobber some physical registers - (the ones that are by convention not saved). */ -DEF_RTL_EXPR(CLOBBER, "clobber", "e", RTX_EXTRA) - -/* Call a subroutine. - Operand 1 is the address to call. - Operand 2 is the number of arguments. */ - -DEF_RTL_EXPR(CALL, "call", "ee", RTX_EXTRA) - -/* Return from a subroutine. */ - -DEF_RTL_EXPR(RETURN, "return", "", RTX_EXTRA) - -/* Conditional trap. - Operand 1 is the condition. - Operand 2 is the trap code. - For an unconditional trap, make the condition (const_int 1). */ -DEF_RTL_EXPR(TRAP_IF, "trap_if", "ee", RTX_EXTRA) - -/* Placeholder for _Unwind_Resume before we know if a function call - or a branch is needed. Operand 1 is the exception region from - which control is flowing. */ -DEF_RTL_EXPR(RESX, "resx", "i", RTX_EXTRA) - -/* ---------------------------------------------------------------------- - Primitive values for use in expressions. - ---------------------------------------------------------------------- */ - -/* numeric integer constant */ -DEF_RTL_EXPR(CONST_INT, "const_int", "w", RTX_CONST_OBJ) - -/* numeric floating point constant. - Operands hold the value. They are all 'w' and there may be from 2 to 6; - see real.h. */ -DEF_RTL_EXPR(CONST_DOUBLE, "const_double", CONST_DOUBLE_FORMAT, RTX_CONST_OBJ) - -/* Describes a vector constant. */ -DEF_RTL_EXPR(CONST_VECTOR, "const_vector", "E", RTX_CONST_OBJ) - -/* String constant. Used for attributes in machine descriptions and - for special cases in DWARF2 debug output. NOT used for source- - language string constants. */ -DEF_RTL_EXPR(CONST_STRING, "const_string", "s", RTX_OBJ) - -/* This is used to encapsulate an expression whose value is constant - (such as the sum of a SYMBOL_REF and a CONST_INT) so that it will be - recognized as a constant operand rather than by arithmetic instructions. */ - -DEF_RTL_EXPR(CONST, "const", "e", RTX_CONST_OBJ) - -/* program counter. Ordinary jumps are represented - by a SET whose first operand is (PC). */ -DEF_RTL_EXPR(PC, "pc", "", RTX_OBJ) - -/* Used in the cselib routines to describe a value. Objects of this - kind are only allocated in cselib.c, in an alloc pool instead of - in GC memory. The only operand of a VALUE is a cselib_val_struct. */ -DEF_RTL_EXPR(VALUE, "value", "0", RTX_OBJ) - -/* A register. The "operand" is the register number, accessed with - the REGNO macro. If this number is less than FIRST_PSEUDO_REGISTER - than a hardware register is being referred to. The second operand - holds the original register number - this will be different for a - pseudo register that got turned into a hard register. The third - operand points to a reg_attrs structure. - This rtx needs to have as many (or more) fields as a MEM, since we - can change REG rtx's into MEMs during reload. */ -DEF_RTL_EXPR(REG, "reg", "i00", RTX_OBJ) - -/* A scratch register. This represents a register used only within a - single insn. It will be turned into a REG during register allocation - or reload unless the constraint indicates that the register won't be - needed, in which case it can remain a SCRATCH. This code is - marked as having one operand so it can be turned into a REG. */ -DEF_RTL_EXPR(SCRATCH, "scratch", "0", RTX_OBJ) - -/* One word of a multi-word value. - The first operand is the complete value; the second says which word. - The WORDS_BIG_ENDIAN flag controls whether word number 0 - (as numbered in a SUBREG) is the most or least significant word. - - This is also used to refer to a value in a different machine mode. - For example, it can be used to refer to a SImode value as if it were - Qimode, or vice versa. Then the word number is always 0. */ -DEF_RTL_EXPR(SUBREG, "subreg", "ei", RTX_EXTRA) - -/* This one-argument rtx is used for move instructions - that are guaranteed to alter only the low part of a destination. - Thus, (SET (SUBREG:HI (REG...)) (MEM:HI ...)) - has an unspecified effect on the high part of REG, - but (SET (STRICT_LOW_PART (SUBREG:HI (REG...))) (MEM:HI ...)) - is guaranteed to alter only the bits of REG that are in HImode. - - The actual instruction used is probably the same in both cases, - but the register constraints may be tighter when STRICT_LOW_PART - is in use. */ - -DEF_RTL_EXPR(STRICT_LOW_PART, "strict_low_part", "e", RTX_EXTRA) - -/* (CONCAT a b) represents the virtual concatenation of a and b - to make a value that has as many bits as a and b put together. - This is used for complex values. Normally it appears only - in DECL_RTLs and during RTL generation, but not in the insn chain. */ -DEF_RTL_EXPR(CONCAT, "concat", "ee", RTX_OBJ) - -/* A memory location; operand is the address. The second operand is the - alias set to which this MEM belongs. We use `0' instead of `w' for this - field so that the field need not be specified in machine descriptions. */ -DEF_RTL_EXPR(MEM, "mem", "e0", RTX_OBJ) - -/* Reference to an assembler label in the code for this function. - The operand is a CODE_LABEL found in the insn chain. */ -DEF_RTL_EXPR(LABEL_REF, "label_ref", "u", RTX_CONST_OBJ) - -/* Reference to a named label: - Operand 0: label name - Operand 1: flags (see SYMBOL_FLAG_* in rtl.h) - Operand 2: tree from which this symbol is derived, or null. - This is either a DECL node, or some kind of constant. */ -DEF_RTL_EXPR(SYMBOL_REF, "symbol_ref", "s00", RTX_CONST_OBJ) - -/* The condition code register is represented, in our imagination, - as a register holding a value that can be compared to zero. - In fact, the machine has already compared them and recorded the - results; but instructions that look at the condition code - pretend to be looking at the entire value and comparing it. */ -DEF_RTL_EXPR(CC0, "cc0", "", RTX_OBJ) - -/* ---------------------------------------------------------------------- - Expressions for operators in an rtl pattern - ---------------------------------------------------------------------- */ - -/* if_then_else. This is used in representing ordinary - conditional jump instructions. - Operand: - 0: condition - 1: then expr - 2: else expr */ -DEF_RTL_EXPR(IF_THEN_ELSE, "if_then_else", "eee", RTX_TERNARY) - -/* Comparison, produces a condition code result. */ -DEF_RTL_EXPR(COMPARE, "compare", "ee", RTX_BIN_ARITH) - -/* plus */ -DEF_RTL_EXPR(PLUS, "plus", "ee", RTX_COMM_ARITH) - -/* Operand 0 minus operand 1. */ -DEF_RTL_EXPR(MINUS, "minus", "ee", RTX_BIN_ARITH) - -/* Minus operand 0. */ -DEF_RTL_EXPR(NEG, "neg", "e", RTX_UNARY) - -DEF_RTL_EXPR(MULT, "mult", "ee", RTX_COMM_ARITH) - -/* Operand 0 divided by operand 1. */ -DEF_RTL_EXPR(DIV, "div", "ee", RTX_BIN_ARITH) -/* Remainder of operand 0 divided by operand 1. */ -DEF_RTL_EXPR(MOD, "mod", "ee", RTX_BIN_ARITH) - -/* Unsigned divide and remainder. */ -DEF_RTL_EXPR(UDIV, "udiv", "ee", RTX_BIN_ARITH) -DEF_RTL_EXPR(UMOD, "umod", "ee", RTX_BIN_ARITH) - -/* Bitwise operations. */ -DEF_RTL_EXPR(AND, "and", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(IOR, "ior", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(XOR, "xor", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(NOT, "not", "e", RTX_UNARY) - -/* Operand: - 0: value to be shifted. - 1: number of bits. */ -DEF_RTL_EXPR(ASHIFT, "ashift", "ee", RTX_BIN_ARITH) /* shift left */ -DEF_RTL_EXPR(ROTATE, "rotate", "ee", RTX_BIN_ARITH) /* rotate left */ -DEF_RTL_EXPR(ASHIFTRT, "ashiftrt", "ee", RTX_BIN_ARITH) /* arithmetic shift right */ -DEF_RTL_EXPR(LSHIFTRT, "lshiftrt", "ee", RTX_BIN_ARITH) /* logical shift right */ -DEF_RTL_EXPR(ROTATERT, "rotatert", "ee", RTX_BIN_ARITH) /* rotate right */ - -/* Minimum and maximum values of two operands. We need both signed and - unsigned forms. (We cannot use MIN for SMIN because it conflicts - with a macro of the same name.) The signed variants should be used - with floating point. Further, if both operands are zeros, or if either - operand is NaN, then it is unspecified which of the two operands is - returned as the result. */ - -DEF_RTL_EXPR(SMIN, "smin", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(SMAX, "smax", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(UMIN, "umin", "ee", RTX_COMM_ARITH) -DEF_RTL_EXPR(UMAX, "umax", "ee", RTX_COMM_ARITH) - -/* These unary operations are used to represent incrementation - and decrementation as they occur in memory addresses. - The amount of increment or decrement are not represented - because they can be understood from the machine-mode of the - containing MEM. These operations exist in only two cases: - 1. pushes onto the stack. - 2. created automatically by the life_analysis pass in flow.c. */ -DEF_RTL_EXPR(PRE_DEC, "pre_dec", "e", RTX_AUTOINC) -DEF_RTL_EXPR(PRE_INC, "pre_inc", "e", RTX_AUTOINC) -DEF_RTL_EXPR(POST_DEC, "post_dec", "e", RTX_AUTOINC) -DEF_RTL_EXPR(POST_INC, "post_inc", "e", RTX_AUTOINC) - -/* These binary operations are used to represent generic address - side-effects in memory addresses, except for simple incrementation - or decrementation which use the above operations. They are - created automatically by the life_analysis pass in flow.c. - The first operand is a REG which is used as the address. - The second operand is an expression that is assigned to the - register, either before (PRE_MODIFY) or after (POST_MODIFY) - evaluating the address. - Currently, the compiler can only handle second operands of the - form (plus (reg) (reg)) and (plus (reg) (const_int)), where - the first operand of the PLUS has to be the same register as - the first operand of the *_MODIFY. */ -DEF_RTL_EXPR(PRE_MODIFY, "pre_modify", "ee", RTX_AUTOINC) -DEF_RTL_EXPR(POST_MODIFY, "post_modify", "ee", RTX_AUTOINC) - -/* Comparison operations. The ordered comparisons exist in two - flavors, signed and unsigned. */ -DEF_RTL_EXPR(NE, "ne", "ee", RTX_COMM_COMPARE) -DEF_RTL_EXPR(EQ, "eq", "ee", RTX_COMM_COMPARE) -DEF_RTL_EXPR(GE, "ge", "ee", RTX_COMPARE) -DEF_RTL_EXPR(GT, "gt", "ee", RTX_COMPARE) -DEF_RTL_EXPR(LE, "le", "ee", RTX_COMPARE) -DEF_RTL_EXPR(LT, "lt", "ee", RTX_COMPARE) -DEF_RTL_EXPR(GEU, "geu", "ee", RTX_COMPARE) -DEF_RTL_EXPR(GTU, "gtu", "ee", RTX_COMPARE) -DEF_RTL_EXPR(LEU, "leu", "ee", RTX_COMPARE) -DEF_RTL_EXPR(LTU, "ltu", "ee", RTX_COMPARE) - -/* Additional floating point unordered comparison flavors. */ -DEF_RTL_EXPR(UNORDERED, "unordered", "ee", RTX_COMM_COMPARE) -DEF_RTL_EXPR(ORDERED, "ordered", "ee", RTX_COMM_COMPARE) - -/* These are equivalent to unordered or ... */ -DEF_RTL_EXPR(UNEQ, "uneq", "ee", RTX_COMM_COMPARE) -DEF_RTL_EXPR(UNGE, "unge", "ee", RTX_COMPARE) -DEF_RTL_EXPR(UNGT, "ungt", "ee", RTX_COMPARE) -DEF_RTL_EXPR(UNLE, "unle", "ee", RTX_COMPARE) -DEF_RTL_EXPR(UNLT, "unlt", "ee", RTX_COMPARE) - -/* This is an ordered NE, ie !UNEQ, ie false for NaN. */ -DEF_RTL_EXPR(LTGT, "ltgt", "ee", RTX_COMM_COMPARE) - -/* Represents the result of sign-extending the sole operand. - The machine modes of the operand and of the SIGN_EXTEND expression - determine how much sign-extension is going on. */ -DEF_RTL_EXPR(SIGN_EXTEND, "sign_extend", "e", RTX_UNARY) - -/* Similar for zero-extension (such as unsigned short to int). */ -DEF_RTL_EXPR(ZERO_EXTEND, "zero_extend", "e", RTX_UNARY) - -/* Similar but here the operand has a wider mode. */ -DEF_RTL_EXPR(TRUNCATE, "truncate", "e", RTX_UNARY) - -/* Similar for extending floating-point values (such as SFmode to DFmode). */ -DEF_RTL_EXPR(FLOAT_EXTEND, "float_extend", "e", RTX_UNARY) -DEF_RTL_EXPR(FLOAT_TRUNCATE, "float_truncate", "e", RTX_UNARY) - -/* Conversion of fixed point operand to floating point value. */ -DEF_RTL_EXPR(FLOAT, "float", "e", RTX_UNARY) - -/* With fixed-point machine mode: - Conversion of floating point operand to fixed point value. - Value is defined only when the operand's value is an integer. - With floating-point machine mode (and operand with same mode): - Operand is rounded toward zero to produce an integer value - represented in floating point. */ -DEF_RTL_EXPR(FIX, "fix", "e", RTX_UNARY) - -/* Conversion of unsigned fixed point operand to floating point value. */ -DEF_RTL_EXPR(UNSIGNED_FLOAT, "unsigned_float", "e", RTX_UNARY) - -/* With fixed-point machine mode: - Conversion of floating point operand to *unsigned* fixed point value. - Value is defined only when the operand's value is an integer. */ -DEF_RTL_EXPR(UNSIGNED_FIX, "unsigned_fix", "e", RTX_UNARY) - -/* Absolute value */ -DEF_RTL_EXPR(ABS, "abs", "e", RTX_UNARY) - -/* Square root */ -DEF_RTL_EXPR(SQRT, "sqrt", "e", RTX_UNARY) -/* APPLE LOCAL begin mainline bswap */ -/* Swap bytes. */ -DEF_RTL_EXPR(BSWAP, "bswap", "e", RTX_UNARY) -/* APPLE LOCAL end mainline bswap */ - -/* Find first bit that is set. - Value is 1 + number of trailing zeros in the arg., - or 0 if arg is 0. */ -DEF_RTL_EXPR(FFS, "ffs", "e", RTX_UNARY) - -/* Count leading zeros. */ -DEF_RTL_EXPR(CLZ, "clz", "e", RTX_UNARY) - -/* Count trailing zeros. */ -DEF_RTL_EXPR(CTZ, "ctz", "e", RTX_UNARY) - -/* Population count (number of 1 bits). */ -DEF_RTL_EXPR(POPCOUNT, "popcount", "e", RTX_UNARY) - -/* Population parity (number of 1 bits modulo 2). */ -DEF_RTL_EXPR(PARITY, "parity", "e", RTX_UNARY) - -/* Reference to a signed bit-field of specified size and position. - Operand 0 is the memory unit (usually SImode or QImode) which - contains the field's first bit. Operand 1 is the width, in bits. - Operand 2 is the number of bits in the memory unit before the - first bit of this field. - If BITS_BIG_ENDIAN is defined, the first bit is the msb and - operand 2 counts from the msb of the memory unit. - Otherwise, the first bit is the lsb and operand 2 counts from - the lsb of the memory unit. - This kind of expression can not appear as an lvalue in RTL. */ -DEF_RTL_EXPR(SIGN_EXTRACT, "sign_extract", "eee", RTX_BITFIELD_OPS) - -/* Similar for unsigned bit-field. - But note! This kind of expression _can_ appear as an lvalue. */ -DEF_RTL_EXPR(ZERO_EXTRACT, "zero_extract", "eee", RTX_BITFIELD_OPS) - -/* For RISC machines. These save memory when splitting insns. */ - -/* HIGH are the high-order bits of a constant expression. */ -DEF_RTL_EXPR(HIGH, "high", "e", RTX_CONST_OBJ) - -/* LO_SUM is the sum of a register and the low-order bits - of a constant expression. */ -DEF_RTL_EXPR(LO_SUM, "lo_sum", "ee", RTX_OBJ) - -/* Describes a merge operation between two vector values. - Operands 0 and 1 are the vectors to be merged, operand 2 is a bitmask - that specifies where the parts of the result are taken from. Set bits - indicate operand 0, clear bits indicate operand 1. The parts are defined - by the mode of the vectors. */ -DEF_RTL_EXPR(VEC_MERGE, "vec_merge", "eee", RTX_TERNARY) - -/* Describes an operation that selects parts of a vector. - Operands 0 is the source vector, operand 1 is a PARALLEL that contains - a CONST_INT for each of the subparts of the result vector, giving the - number of the source subpart that should be stored into it. */ -DEF_RTL_EXPR(VEC_SELECT, "vec_select", "ee", RTX_BIN_ARITH) - -/* Describes a vector concat operation. Operands 0 and 1 are the source - vectors, the result is a vector that is as long as operands 0 and 1 - combined and is the concatenation of the two source vectors. */ -DEF_RTL_EXPR(VEC_CONCAT, "vec_concat", "ee", RTX_BIN_ARITH) - -/* Describes an operation that converts a small vector into a larger one by - duplicating the input values. The output vector mode must have the same - submodes as the input vector mode, and the number of output parts must be - an integer multiple of the number of input parts. */ -DEF_RTL_EXPR(VEC_DUPLICATE, "vec_duplicate", "e", RTX_UNARY) - -/* Addition with signed saturation */ -DEF_RTL_EXPR(SS_PLUS, "ss_plus", "ee", RTX_COMM_ARITH) - -/* Addition with unsigned saturation */ -DEF_RTL_EXPR(US_PLUS, "us_plus", "ee", RTX_COMM_ARITH) - -/* Operand 0 minus operand 1, with signed saturation. */ -DEF_RTL_EXPR(SS_MINUS, "ss_minus", "ee", RTX_BIN_ARITH) - -/* Negation with signed saturation. */ -DEF_RTL_EXPR(SS_NEG, "ss_neg", "e", RTX_UNARY) - -/* Shift left with signed saturation. */ -DEF_RTL_EXPR(SS_ASHIFT, "ss_ashift", "ee", RTX_BIN_ARITH) - -/* Operand 0 minus operand 1, with unsigned saturation. */ -DEF_RTL_EXPR(US_MINUS, "us_minus", "ee", RTX_BIN_ARITH) - -/* Signed saturating truncate. */ -DEF_RTL_EXPR(SS_TRUNCATE, "ss_truncate", "e", RTX_UNARY) - -/* Unsigned saturating truncate. */ -DEF_RTL_EXPR(US_TRUNCATE, "us_truncate", "e", RTX_UNARY) - -/* Information about the variable and its location. */ -/* APPLE LOCAL begin track initialization status 4964532 */ -/* Third field, i, is for variable initialization status. */ -DEF_RTL_EXPR(VAR_LOCATION, "var_location", "tei", RTX_EXTRA) -/* APPLE LOCAL end track initialization status 4964532 */ - -/* All expressions from this point forward appear only in machine - descriptions. */ -#ifdef GENERATOR_FILE - -/* Include a secondary machine-description file at this point. */ -DEF_RTL_EXPR(INCLUDE, "include", "s", RTX_EXTRA) - -/* Pattern-matching operators: */ - -/* Use the function named by the second arg (the string) - as a predicate; if matched, store the structure that was matched - in the operand table at index specified by the first arg (the integer). - If the second arg is the null string, the structure is just stored. - - A third string argument indicates to the register allocator restrictions - on where the operand can be allocated. - - If the target needs no restriction on any instruction this field should - be the null string. - - The string is prepended by: - '=' to indicate the operand is only written to. - '+' to indicate the operand is both read and written to. - - Each character in the string represents an allocable class for an operand. - 'g' indicates the operand can be any valid class. - 'i' indicates the operand can be immediate (in the instruction) data. - 'r' indicates the operand can be in a register. - 'm' indicates the operand can be in memory. - 'o' a subset of the 'm' class. Those memory addressing modes that - can be offset at compile time (have a constant added to them). - - Other characters indicate target dependent operand classes and - are described in each target's machine description. - - For instructions with more than one operand, sets of classes can be - separated by a comma to indicate the appropriate multi-operand constraints. - There must be a 1 to 1 correspondence between these sets of classes in - all operands for an instruction. - */ -DEF_RTL_EXPR(MATCH_OPERAND, "match_operand", "iss", RTX_MATCH) - -/* Match a SCRATCH or a register. When used to generate rtl, a - SCRATCH is generated. As for MATCH_OPERAND, the mode specifies - the desired mode and the first argument is the operand number. - The second argument is the constraint. */ -DEF_RTL_EXPR(MATCH_SCRATCH, "match_scratch", "is", RTX_MATCH) - -/* Apply a predicate, AND match recursively the operands of the rtx. - Operand 0 is the operand-number, as in match_operand. - Operand 1 is a predicate to apply (as a string, a function name). - Operand 2 is a vector of expressions, each of which must match - one subexpression of the rtx this construct is matching. */ -DEF_RTL_EXPR(MATCH_OPERATOR, "match_operator", "isE", RTX_MATCH) - -/* Match a PARALLEL of arbitrary length. The predicate is applied - to the PARALLEL and the initial expressions in the PARALLEL are matched. - Operand 0 is the operand-number, as in match_operand. - Operand 1 is a predicate to apply to the PARALLEL. - Operand 2 is a vector of expressions, each of which must match the - corresponding element in the PARALLEL. */ -DEF_RTL_EXPR(MATCH_PARALLEL, "match_parallel", "isE", RTX_MATCH) - -/* Match only something equal to what is stored in the operand table - at the index specified by the argument. Use with MATCH_OPERAND. */ -DEF_RTL_EXPR(MATCH_DUP, "match_dup", "i", RTX_MATCH) - -/* Match only something equal to what is stored in the operand table - at the index specified by the argument. Use with MATCH_OPERATOR. */ -DEF_RTL_EXPR(MATCH_OP_DUP, "match_op_dup", "iE", RTX_MATCH) - -/* Match only something equal to what is stored in the operand table - at the index specified by the argument. Use with MATCH_PARALLEL. */ -DEF_RTL_EXPR(MATCH_PAR_DUP, "match_par_dup", "iE", RTX_MATCH) - -/* Appears only in define_predicate/define_special_predicate - expressions. Evaluates true only if the operand has an RTX code - from the set given by the argument (a comma-separated list). If the - second argument is present and nonempty, it is a sequence of digits - and/or letters which indicates the subexpression to test, using the - same syntax as genextract/genrecog's location strings: 0-9 for - XEXP (op, n), a-z for XVECEXP (op, 0, n); each character applies to - the result of the one before it. */ -DEF_RTL_EXPR(MATCH_CODE, "match_code", "ss", RTX_MATCH) - -/* Appears only in define_predicate/define_special_predicate - expressions. The argument is a C expression to be injected at this - point in the predicate formula. */ -DEF_RTL_EXPR(MATCH_TEST, "match_test", "s", RTX_MATCH) - -/* Insn (and related) definitions. */ - -/* Definition of the pattern for one kind of instruction. - Operand: - 0: names this instruction. - If the name is the null string, the instruction is in the - machine description just to be recognized, and will never be emitted by - the tree to rtl expander. - 1: is the pattern. - 2: is a string which is a C expression - giving an additional condition for recognizing this pattern. - A null string means no extra condition. - 3: is the action to execute if this pattern is matched. - If this assembler code template starts with a * then it is a fragment of - C code to run to decide on a template to use. Otherwise, it is the - template to use. - 4: optionally, a vector of attributes for this insn. - */ -DEF_RTL_EXPR(DEFINE_INSN, "define_insn", "sEsTV", RTX_EXTRA) - -/* Definition of a peephole optimization. - 1st operand: vector of insn patterns to match - 2nd operand: C expression that must be true - 3rd operand: template or C code to produce assembler output. - 4: optionally, a vector of attributes for this insn. - - This form is deprecated; use define_peephole2 instead. */ -DEF_RTL_EXPR(DEFINE_PEEPHOLE, "define_peephole", "EsTV", RTX_EXTRA) - -/* Definition of a split operation. - 1st operand: insn pattern to match - 2nd operand: C expression that must be true - 3rd operand: vector of insn patterns to place into a SEQUENCE - 4th operand: optionally, some C code to execute before generating the - insns. This might, for example, create some RTX's and store them in - elements of `recog_data.operand' for use by the vector of - insn-patterns. - (`operands' is an alias here for `recog_data.operand'). */ -DEF_RTL_EXPR(DEFINE_SPLIT, "define_split", "EsES", RTX_EXTRA) - -/* Definition of an insn and associated split. - This is the concatenation, with a few modifications, of a define_insn - and a define_split which share the same pattern. - Operand: - 0: names this instruction. - If the name is the null string, the instruction is in the - machine description just to be recognized, and will never be emitted by - the tree to rtl expander. - 1: is the pattern. - 2: is a string which is a C expression - giving an additional condition for recognizing this pattern. - A null string means no extra condition. - 3: is the action to execute if this pattern is matched. - If this assembler code template starts with a * then it is a fragment of - C code to run to decide on a template to use. Otherwise, it is the - template to use. - 4: C expression that must be true for split. This may start with "&&" - in which case the split condition is the logical and of the insn - condition and what follows the "&&" of this operand. - 5: vector of insn patterns to place into a SEQUENCE - 6: optionally, some C code to execute before generating the - insns. This might, for example, create some RTX's and store them in - elements of `recog_data.operand' for use by the vector of - insn-patterns. - (`operands' is an alias here for `recog_data.operand'). - 7: optionally, a vector of attributes for this insn. */ -DEF_RTL_EXPR(DEFINE_INSN_AND_SPLIT, "define_insn_and_split", "sEsTsESV", RTX_EXTRA) - -/* Definition of an RTL peephole operation. - Follows the same arguments as define_split. */ -DEF_RTL_EXPR(DEFINE_PEEPHOLE2, "define_peephole2", "EsES", RTX_EXTRA) - -/* Define how to generate multiple insns for a standard insn name. - 1st operand: the insn name. - 2nd operand: vector of insn-patterns. - Use match_operand to substitute an element of `recog_data.operand'. - 3rd operand: C expression that must be true for this to be available. - This may not test any operands. - 4th operand: Extra C code to execute before generating the insns. - This might, for example, create some RTX's and store them in - elements of `recog_data.operand' for use by the vector of - insn-patterns. - (`operands' is an alias here for `recog_data.operand'). */ -DEF_RTL_EXPR(DEFINE_EXPAND, "define_expand", "sEss", RTX_EXTRA) - -/* Define a requirement for delay slots. - 1st operand: Condition involving insn attributes that, if true, - indicates that the insn requires the number of delay slots - shown. - 2nd operand: Vector whose length is the three times the number of delay - slots required. - Each entry gives three conditions, each involving attributes. - The first must be true for an insn to occupy that delay slot - location. The second is true for all insns that can be - annulled if the branch is true and the third is true for all - insns that can be annulled if the branch is false. - - Multiple DEFINE_DELAYs may be present. They indicate differing - requirements for delay slots. */ -DEF_RTL_EXPR(DEFINE_DELAY, "define_delay", "eE", RTX_EXTRA) - -/* Define attribute computation for `asm' instructions. */ -DEF_RTL_EXPR(DEFINE_ASM_ATTRIBUTES, "define_asm_attributes", "V", RTX_EXTRA) - -/* Definition of a conditional execution meta operation. Automatically - generates new instances of DEFINE_INSN, selected by having attribute - "predicable" true. The new pattern will contain a COND_EXEC and the - predicate at top-level. - - Operand: - 0: The predicate pattern. The top-level form should match a - relational operator. Operands should have only one alternative. - 1: A C expression giving an additional condition for recognizing - the generated pattern. - 2: A template or C code to produce assembler output. */ -DEF_RTL_EXPR(DEFINE_COND_EXEC, "define_cond_exec", "Ess", RTX_EXTRA) - -/* Definition of an operand predicate. The difference between - DEFINE_PREDICATE and DEFINE_SPECIAL_PREDICATE is that genrecog will - not warn about a match_operand with no mode if it has a predicate - defined with DEFINE_SPECIAL_PREDICATE. - - Operand: - 0: The name of the predicate. - 1: A boolean expression which computes whether or not the predicate - matches. This expression can use IOR, AND, NOT, MATCH_OPERAND, - MATCH_CODE, and MATCH_TEST. It must be specific enough that genrecog - can calculate the set of RTX codes that can possibly match. - 2: A C function body which must return true for the predicate to match. - Optional. Use this when the test is too complicated to fit into a - match_test expression. */ -DEF_RTL_EXPR(DEFINE_PREDICATE, "define_predicate", "ses", RTX_EXTRA) -DEF_RTL_EXPR(DEFINE_SPECIAL_PREDICATE, "define_special_predicate", "ses", RTX_EXTRA) - -/* Definition of a register operand constraint. This simply maps the - constraint string to a register class. - - Operand: - 0: The name of the constraint (often, but not always, a single letter). - 1: A C expression which evaluates to the appropriate register class for - this constraint. If this is not just a constant, it should look only - at -m switches and the like. - 2: A docstring for this constraint, in Texinfo syntax; not currently - used, in future will be incorporated into the manual's list of - machine-specific operand constraints. */ -DEF_RTL_EXPR(DEFINE_REGISTER_CONSTRAINT, "define_register_constraint", "sss", RTX_EXTRA) - -/* Definition of a non-register operand constraint. These look at the - operand and decide whether it fits the constraint. - - DEFINE_CONSTRAINT gets no special treatment if it fails to match. - It is appropriate for constant-only constraints, and most others. - - DEFINE_MEMORY_CONSTRAINT tells reload that this constraint can be made - to match, if it doesn't already, by converting the operand to the form - (mem (reg X)) where X is a base register. It is suitable for constraints - that describe a subset of all memory references. - - DEFINE_ADDRESS_CONSTRAINT tells reload that this constraint can be made - to match, if it doesn't already, by converting the operand to the form - (reg X) where X is a base register. It is suitable for constraints that - describe a subset of all address references. - - When in doubt, use plain DEFINE_CONSTRAINT. - - Operand: - 0: The name of the constraint (often, but not always, a single letter). - 1: A docstring for this constraint, in Texinfo syntax; not currently - used, in future will be incorporated into the manual's list of - machine-specific operand constraints. - 2: A boolean expression which computes whether or not the constraint - matches. It should follow the same rules as a define_predicate - expression, including the bit about specifying the set of RTX codes - that could possibly match. MATCH_TEST subexpressions may make use of - these variables: - `op' - the RTL object defining the operand. - `mode' - the mode of `op'. - `ival' - INTVAL(op), if op is a CONST_INT. - `hval' - CONST_DOUBLE_HIGH(op), if op is an integer CONST_DOUBLE. - `lval' - CONST_DOUBLE_LOW(op), if op is an integer CONST_DOUBLE. - `rval' - CONST_DOUBLE_REAL_VALUE(op), if op is a floating-point - CONST_DOUBLE. - Do not use ival/hval/lval/rval if op is not the appropriate kind of - RTL object. */ -DEF_RTL_EXPR(DEFINE_CONSTRAINT, "define_constraint", "sse", RTX_EXTRA) -DEF_RTL_EXPR(DEFINE_MEMORY_CONSTRAINT, "define_memory_constraint", "sse", RTX_EXTRA) -DEF_RTL_EXPR(DEFINE_ADDRESS_CONSTRAINT, "define_address_constraint", "sse", RTX_EXTRA) - - -/* Constructions for CPU pipeline description described by NDFAs. */ - -/* (define_cpu_unit string [string]) describes cpu functional - units (separated by comma). - - 1st operand: Names of cpu functional units. - 2nd operand: Name of automaton (see comments for DEFINE_AUTOMATON). - - All define_reservations, define_cpu_units, and - define_query_cpu_units should have unique names which may not be - "nothing". */ -DEF_RTL_EXPR(DEFINE_CPU_UNIT, "define_cpu_unit", "sS", RTX_EXTRA) - -/* (define_query_cpu_unit string [string]) describes cpu functional - units analogously to define_cpu_unit. The reservation of such - units can be queried for automaton state. */ -DEF_RTL_EXPR(DEFINE_QUERY_CPU_UNIT, "define_query_cpu_unit", "sS", RTX_EXTRA) - -/* (exclusion_set string string) means that each CPU functional unit - in the first string can not be reserved simultaneously with any - unit whose name is in the second string and vise versa. CPU units - in the string are separated by commas. For example, it is useful - for description CPU with fully pipelined floating point functional - unit which can execute simultaneously only single floating point - insns or only double floating point insns. All CPU functional - units in a set should belong to the same automaton. */ -DEF_RTL_EXPR(EXCLUSION_SET, "exclusion_set", "ss", RTX_EXTRA) - -/* (presence_set string string) means that each CPU functional unit in - the first string can not be reserved unless at least one of pattern - of units whose names are in the second string is reserved. This is - an asymmetric relation. CPU units or unit patterns in the strings - are separated by commas. Pattern is one unit name or unit names - separated by white-spaces. - - For example, it is useful for description that slot1 is reserved - after slot0 reservation for a VLIW processor. We could describe it - by the following construction - - (presence_set "slot1" "slot0") - - Or slot1 is reserved only after slot0 and unit b0 reservation. In - this case we could write - - (presence_set "slot1" "slot0 b0") - - All CPU functional units in a set should belong to the same - automaton. */ -DEF_RTL_EXPR(PRESENCE_SET, "presence_set", "ss", RTX_EXTRA) - -/* (final_presence_set string string) is analogous to `presence_set'. - The difference between them is when checking is done. When an - instruction is issued in given automaton state reflecting all - current and planned unit reservations, the automaton state is - changed. The first state is a source state, the second one is a - result state. Checking for `presence_set' is done on the source - state reservation, checking for `final_presence_set' is done on the - result reservation. This construction is useful to describe a - reservation which is actually two subsequent reservations. For - example, if we use - - (presence_set "slot1" "slot0") - - the following insn will be never issued (because slot1 requires - slot0 which is absent in the source state). - - (define_reservation "insn_and_nop" "slot0 + slot1") - - but it can be issued if we use analogous `final_presence_set'. */ -DEF_RTL_EXPR(FINAL_PRESENCE_SET, "final_presence_set", "ss", RTX_EXTRA) - -/* (absence_set string string) means that each CPU functional unit in - the first string can be reserved only if each pattern of units - whose names are in the second string is not reserved. This is an - asymmetric relation (actually exclusion set is analogous to this - one but it is symmetric). CPU units or unit patterns in the string - are separated by commas. Pattern is one unit name or unit names - separated by white-spaces. - - For example, it is useful for description that slot0 can not be - reserved after slot1 or slot2 reservation for a VLIW processor. We - could describe it by the following construction - - (absence_set "slot2" "slot0, slot1") - - Or slot2 can not be reserved if slot0 and unit b0 are reserved or - slot1 and unit b1 are reserved . In this case we could write - - (absence_set "slot2" "slot0 b0, slot1 b1") - - All CPU functional units in a set should to belong the same - automaton. */ -DEF_RTL_EXPR(ABSENCE_SET, "absence_set", "ss", RTX_EXTRA) - -/* (final_absence_set string string) is analogous to `absence_set' but - checking is done on the result (state) reservation. See comments - for `final_presence_set'. */ -DEF_RTL_EXPR(FINAL_ABSENCE_SET, "final_absence_set", "ss", RTX_EXTRA) - -/* (define_bypass number out_insn_names in_insn_names) names bypass - with given latency (the first number) from insns given by the first - string (see define_insn_reservation) into insns given by the second - string. Insn names in the strings are separated by commas. The - third operand is optional name of function which is additional - guard for the bypass. The function will get the two insns as - parameters. If the function returns zero the bypass will be - ignored for this case. Additional guard is necessary to recognize - complicated bypasses, e.g. when consumer is load address. */ -DEF_RTL_EXPR(DEFINE_BYPASS, "define_bypass", "issS", RTX_EXTRA) - -/* (define_automaton string) describes names of automata generated and - used for pipeline hazards recognition. The names are separated by - comma. Actually it is possibly to generate the single automaton - but unfortunately it can be very large. If we use more one - automata, the summary size of the automata usually is less than the - single one. The automaton name is used in define_cpu_unit and - define_query_cpu_unit. All automata should have unique names. */ -DEF_RTL_EXPR(DEFINE_AUTOMATON, "define_automaton", "s", RTX_EXTRA) - -/* (automata_option string) describes option for generation of - automata. Currently there are the following options: - - o "no-minimization" which makes no minimization of automata. This - is only worth to do when we are debugging the description and - need to look more accurately at reservations of states. - - o "time" which means printing additional time statistics about - generation of automata. - - o "v" which means generation of file describing the result - automata. The file has suffix `.dfa' and can be used for the - description verification and debugging. - - o "w" which means generation of warning instead of error for - non-critical errors. - - o "ndfa" which makes nondeterministic finite state automata. - - o "progress" which means output of a progress bar showing how many - states were generated so far for automaton being processed. */ -DEF_RTL_EXPR(AUTOMATA_OPTION, "automata_option", "s", RTX_EXTRA) - -/* (define_reservation string string) names reservation (the first - string) of cpu functional units (the 2nd string). Sometimes unit - reservations for different insns contain common parts. In such - case, you can describe common part and use its name (the 1st - parameter) in regular expression in define_insn_reservation. All - define_reservations, define_cpu_units, and define_query_cpu_units - should have unique names which may not be "nothing". */ -DEF_RTL_EXPR(DEFINE_RESERVATION, "define_reservation", "ss", RTX_EXTRA) - -/* (define_insn_reservation name default_latency condition regexpr) - describes reservation of cpu functional units (the 3nd operand) for - instruction which is selected by the condition (the 2nd parameter). - The first parameter is used for output of debugging information. - The reservations are described by a regular expression according - the following syntax: - - regexp = regexp "," oneof - | oneof - - oneof = oneof "|" allof - | allof - - allof = allof "+" repeat - | repeat - - repeat = element "*" number - | element - - element = cpu_function_unit_name - | reservation_name - | result_name - | "nothing" - | "(" regexp ")" - - 1. "," is used for describing start of the next cycle in - reservation. - - 2. "|" is used for describing the reservation described by the - first regular expression *or* the reservation described by the - second regular expression *or* etc. - - 3. "+" is used for describing the reservation described by the - first regular expression *and* the reservation described by the - second regular expression *and* etc. - - 4. "*" is used for convenience and simply means sequence in - which the regular expression are repeated NUMBER times with - cycle advancing (see ","). - - 5. cpu functional unit name which means its reservation. - - 6. reservation name -- see define_reservation. - - 7. string "nothing" means no units reservation. */ - -DEF_RTL_EXPR(DEFINE_INSN_RESERVATION, "define_insn_reservation", "sies", RTX_EXTRA) - -/* Expressions used for insn attributes. */ - -/* Definition of an insn attribute. - 1st operand: name of the attribute - 2nd operand: comma-separated list of possible attribute values - 3rd operand: expression for the default value of the attribute. */ -DEF_RTL_EXPR(DEFINE_ATTR, "define_attr", "sse", RTX_EXTRA) - -/* Marker for the name of an attribute. */ -DEF_RTL_EXPR(ATTR, "attr", "s", RTX_EXTRA) - -/* For use in the last (optional) operand of DEFINE_INSN or DEFINE_PEEPHOLE and - in DEFINE_ASM_INSN to specify an attribute to assign to insns matching that - pattern. - - (set_attr "name" "value") is equivalent to - (set (attr "name") (const_string "value")) */ -DEF_RTL_EXPR(SET_ATTR, "set_attr", "ss", RTX_EXTRA) - -/* In the last operand of DEFINE_INSN and DEFINE_PEEPHOLE, this can be used to - specify that attribute values are to be assigned according to the - alternative matched. - - The following three expressions are equivalent: - - (set (attr "att") (cond [(eq_attrq "alternative" "1") (const_string "a1") - (eq_attrq "alternative" "2") (const_string "a2")] - (const_string "a3"))) - (set_attr_alternative "att" [(const_string "a1") (const_string "a2") - (const_string "a3")]) - (set_attr "att" "a1,a2,a3") - */ -DEF_RTL_EXPR(SET_ATTR_ALTERNATIVE, "set_attr_alternative", "sE", RTX_EXTRA) - -/* A conditional expression true if the value of the specified attribute of - the current insn equals the specified value. The first operand is the - attribute name and the second is the comparison value. */ -DEF_RTL_EXPR(EQ_ATTR, "eq_attr", "ss", RTX_EXTRA) - -/* A special case of the above representing a set of alternatives. The first - operand is bitmap of the set, the second one is the default value. */ -DEF_RTL_EXPR(EQ_ATTR_ALT, "eq_attr_alt", "ii", RTX_EXTRA) - -/* A conditional expression which is true if the specified flag is - true for the insn being scheduled in reorg. - - genattr.c defines the following flags which can be tested by - (attr_flag "foo") expressions in eligible_for_delay. - - forward, backward, very_likely, likely, very_unlikely, and unlikely. */ - -DEF_RTL_EXPR (ATTR_FLAG, "attr_flag", "s", RTX_EXTRA) - -/* General conditional. The first operand is a vector composed of pairs of - expressions. The first element of each pair is evaluated, in turn. - The value of the conditional is the second expression of the first pair - whose first expression evaluates nonzero. If none of the expressions is - true, the second operand will be used as the value of the conditional. */ -DEF_RTL_EXPR(COND, "cond", "Ee", RTX_EXTRA) - -#endif /* GENERATOR_FILE */ - -/* -Local variables: -mode:c -End: -*/ |