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Diffstat (limited to 'include/xtensa-isa.h')
| -rw-r--r-- | include/xtensa-isa.h | 805 |
1 files changed, 0 insertions, 805 deletions
diff --git a/include/xtensa-isa.h b/include/xtensa-isa.h deleted file mode 100644 index c4e31ed7f..000000000 --- a/include/xtensa-isa.h +++ /dev/null @@ -1,805 +0,0 @@ -/* Interface definition for configurable Xtensa ISA support. - Copyright 2003, 2004, 2005, 2006 Free Software Foundation, Inc. - - This file is part of BFD, the Binary File Descriptor library. - - This program 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 of the License, or - (at your option) any later version. - - This program 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 this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ - -#ifndef XTENSA_LIBISA_H -#define XTENSA_LIBISA_H - -#ifdef __cplusplus -extern "C" { -#endif - -/* Version number: This is intended to help support code that works with - versions of this library from multiple Xtensa releases. */ - -#define XTENSA_ISA_VERSION 7000 - -#ifndef uint32 -#define uint32 unsigned int -#endif - -/* This file defines the interface to the Xtensa ISA library. This - library contains most of the ISA-specific information for a - particular Xtensa processor. For example, the set of valid - instructions, their opcode encodings and operand fields are all - included here. - - This interface basically defines a number of abstract data types. - - . an instruction buffer - for holding the raw instruction bits - . ISA info - information about the ISA as a whole - . instruction formats - instruction size and slot structure - . opcodes - information about individual instructions - . operands - information about register and immediate instruction operands - . stateOperands - information about processor state instruction operands - . interfaceOperands - information about interface instruction operands - . register files - register file information - . processor states - internal processor state information - . system registers - "special registers" and "user registers" - . interfaces - TIE interfaces that are external to the processor - . functional units - TIE shared functions - - The interface defines a set of functions to access each data type. - With the exception of the instruction buffer, the internal - representations of the data structures are hidden. All accesses must - be made through the functions defined here. */ - -typedef struct xtensa_isa_opaque { int unused; } *xtensa_isa; - - -/* Most of the Xtensa ISA entities (e.g., opcodes, regfiles, etc.) are - represented here using sequential integers beginning with 0. The - specific values are only fixed for a particular instantiation of an - xtensa_isa structure, so these values should only be used - internally. */ - -typedef int xtensa_opcode; -typedef int xtensa_format; -typedef int xtensa_regfile; -typedef int xtensa_state; -typedef int xtensa_sysreg; -typedef int xtensa_interface; -typedef int xtensa_funcUnit; - - -/* Define a unique value for undefined items. */ - -#define XTENSA_UNDEFINED -1 - - -/* Overview of using this interface to decode/encode instructions: - - Each Xtensa instruction is associated with a particular instruction - format, where the format defines a fixed number of slots for - operations. The formats for the core Xtensa ISA have only one slot, - but FLIX instructions may have multiple slots. Within each slot, - there is a single opcode and some number of associated operands. - - The encoding and decoding functions operate on instruction buffers, - not on the raw bytes of the instructions. The same instruction - buffer data structure is used for both entire instructions and - individual slots in those instructions -- the contents of a slot need - to be extracted from or inserted into the buffer for the instruction - as a whole. - - Decoding an instruction involves first finding the format, which - identifies the number of slots, and then decoding each slot - separately. A slot is decoded by finding the opcode and then using - the opcode to determine how many operands there are. For example: - - xtensa_insnbuf_from_chars - xtensa_format_decode - for each slot { - xtensa_format_get_slot - xtensa_opcode_decode - for each operand { - xtensa_operand_get_field - xtensa_operand_decode - } - } - - Encoding an instruction is roughly the same procedure in reverse: - - xtensa_format_encode - for each slot { - xtensa_opcode_encode - for each operand { - xtensa_operand_encode - xtensa_operand_set_field - } - xtensa_format_set_slot - } - xtensa_insnbuf_to_chars -*/ - - -/* Error handling. */ - -/* Error codes. The code for the most recent error condition can be - retrieved with the "errno" function. For any result other than - xtensa_isa_ok, an error message containing additional information - about the problem can be retrieved using the "error_msg" function. - The error messages are stored in an internal buffer, which should - not be freed and may be overwritten by subsequent operations. */ - -typedef enum xtensa_isa_status_enum -{ - xtensa_isa_ok = 0, - xtensa_isa_bad_format, - xtensa_isa_bad_slot, - xtensa_isa_bad_opcode, - xtensa_isa_bad_operand, - xtensa_isa_bad_field, - xtensa_isa_bad_iclass, - xtensa_isa_bad_regfile, - xtensa_isa_bad_sysreg, - xtensa_isa_bad_state, - xtensa_isa_bad_interface, - xtensa_isa_bad_funcUnit, - xtensa_isa_wrong_slot, - xtensa_isa_no_field, - xtensa_isa_out_of_memory, - xtensa_isa_buffer_overflow, - xtensa_isa_internal_error, - xtensa_isa_bad_value -} xtensa_isa_status; - -extern xtensa_isa_status -xtensa_isa_errno (xtensa_isa isa); - -extern char * -xtensa_isa_error_msg (xtensa_isa isa); - - - -/* Instruction buffers. */ - -typedef uint32 xtensa_insnbuf_word; -typedef xtensa_insnbuf_word *xtensa_insnbuf; - - -/* Get the size in "insnbuf_words" of the xtensa_insnbuf array. */ - -extern int -xtensa_insnbuf_size (xtensa_isa isa); - - -/* Allocate an xtensa_insnbuf of the right size. */ - -extern xtensa_insnbuf -xtensa_insnbuf_alloc (xtensa_isa isa); - - -/* Release an xtensa_insnbuf. */ - -extern void -xtensa_insnbuf_free (xtensa_isa isa, xtensa_insnbuf buf); - - -/* Conversion between raw memory (char arrays) and our internal - instruction representation. This is complicated by the Xtensa ISA's - variable instruction lengths. When converting to chars, the buffer - must contain a valid instruction so we know how many bytes to copy; - thus, the "to_chars" function returns the number of bytes copied or - XTENSA_UNDEFINED on error. The "from_chars" function first reads the - minimal number of bytes required to decode the instruction length and - then proceeds to copy the entire instruction into the buffer; if the - memory does not contain a valid instruction, it copies the maximum - number of bytes required for the longest Xtensa instruction. The - "num_chars" argument may be used to limit the number of bytes that - can be read or written. Otherwise, if "num_chars" is zero, the - functions may read or write past the end of the code. */ - -extern int -xtensa_insnbuf_to_chars (xtensa_isa isa, const xtensa_insnbuf insn, - unsigned char *cp, int num_chars); - -extern void -xtensa_insnbuf_from_chars (xtensa_isa isa, xtensa_insnbuf insn, - const unsigned char *cp, int num_chars); - - - -/* ISA information. */ - -/* Initialize the ISA information. */ - -extern xtensa_isa -xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p); - - -/* Deallocate an xtensa_isa structure. */ - -extern void -xtensa_isa_free (xtensa_isa isa); - - -/* Get the maximum instruction size in bytes. */ - -extern int -xtensa_isa_maxlength (xtensa_isa isa); - - -/* Decode the length in bytes of an instruction in raw memory (not an - insnbuf). This function reads only the minimal number of bytes - required to decode the instruction length. Returns - XTENSA_UNDEFINED on error. */ - -extern int -xtensa_isa_length_from_chars (xtensa_isa isa, const unsigned char *cp); - - -/* Get the number of stages in the processor's pipeline. The pipeline - stage values returned by other functions in this library will range - from 0 to N-1, where N is the value returned by this function. - Note that the stage numbers used here may not correspond to the - actual processor hardware, e.g., the hardware may have additional - stages before stage 0. Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_isa_num_pipe_stages (xtensa_isa isa); - - -/* Get the number of various entities that are defined for this processor. */ - -extern int -xtensa_isa_num_formats (xtensa_isa isa); - -extern int -xtensa_isa_num_opcodes (xtensa_isa isa); - -extern int -xtensa_isa_num_regfiles (xtensa_isa isa); - -extern int -xtensa_isa_num_states (xtensa_isa isa); - -extern int -xtensa_isa_num_sysregs (xtensa_isa isa); - -extern int -xtensa_isa_num_interfaces (xtensa_isa isa); - -extern int -xtensa_isa_num_funcUnits (xtensa_isa isa); - - - -/* Instruction formats. */ - -/* Get the name of a format. Returns null on error. */ - -extern const char * -xtensa_format_name (xtensa_isa isa, xtensa_format fmt); - - -/* Given a format name, return the format number. Returns - XTENSA_UNDEFINED if the name is not a valid format. */ - -extern xtensa_format -xtensa_format_lookup (xtensa_isa isa, const char *fmtname); - - -/* Decode the instruction format from a binary instruction buffer. - Returns XTENSA_UNDEFINED if the format is not recognized. */ - -extern xtensa_format -xtensa_format_decode (xtensa_isa isa, const xtensa_insnbuf insn); - - -/* Set the instruction format field(s) in a binary instruction buffer. - All the other fields are set to zero. Returns non-zero on error. */ - -extern int -xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn); - - -/* Find the length (in bytes) of an instruction. Returns - XTENSA_UNDEFINED on error. */ - -extern int -xtensa_format_length (xtensa_isa isa, xtensa_format fmt); - - -/* Get the number of slots in an instruction. Returns XTENSA_UNDEFINED - on error. */ - -extern int -xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt); - - -/* Get the opcode for a no-op in a particular slot. - Returns XTENSA_UNDEFINED on error. */ - -extern xtensa_opcode -xtensa_format_slot_nop_opcode (xtensa_isa isa, xtensa_format fmt, int slot); - - -/* Get the bits for a specified slot out of an insnbuf for the - instruction as a whole and put them into an insnbuf for that one - slot, and do the opposite to set a slot. Return non-zero on error. */ - -extern int -xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot, - const xtensa_insnbuf insn, xtensa_insnbuf slotbuf); - -extern int -xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot, - xtensa_insnbuf insn, const xtensa_insnbuf slotbuf); - - - -/* Opcode information. */ - -/* Translate a mnemonic name to an opcode. Returns XTENSA_UNDEFINED if - the name is not a valid opcode mnemonic. */ - -extern xtensa_opcode -xtensa_opcode_lookup (xtensa_isa isa, const char *opname); - - -/* Decode the opcode for one instruction slot from a binary instruction - buffer. Returns the opcode or XTENSA_UNDEFINED if the opcode is - illegal. */ - -extern xtensa_opcode -xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot, - const xtensa_insnbuf slotbuf); - - -/* Set the opcode field(s) for an instruction slot. All other fields - in the slot are set to zero. Returns non-zero if the opcode cannot - be encoded. */ - -extern int -xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot, - xtensa_insnbuf slotbuf, xtensa_opcode opc); - - -/* Get the mnemonic name for an opcode. Returns null on error. */ - -extern const char * -xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc); - - -/* Check various properties of opcodes. These functions return 0 if - the condition is false, 1 if the condition is true, and - XTENSA_UNDEFINED on error. The instructions are classified as - follows: - - branch: conditional branch; may fall through to next instruction (B*) - jump: unconditional branch (J, JX, RET*, RF*) - loop: zero-overhead loop (LOOP*) - call: unconditional call; control returns to next instruction (CALL*) - - For the opcodes that affect control flow in some way, the branch - target may be specified by an immediate operand or it may be an - address stored in a register. You can distinguish these by - checking if the instruction has a PC-relative immediate - operand. */ - -extern int -xtensa_opcode_is_branch (xtensa_isa isa, xtensa_opcode opc); - -extern int -xtensa_opcode_is_jump (xtensa_isa isa, xtensa_opcode opc); - -extern int -xtensa_opcode_is_loop (xtensa_isa isa, xtensa_opcode opc); - -extern int -xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc); - - -/* Find the number of ordinary operands, state operands, and interface - operands for an instruction. These return XTENSA_UNDEFINED on - error. */ - -extern int -xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc); - -extern int -xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc); - -extern int -xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc); - - -/* Get functional unit usage requirements for an opcode. Each "use" - is identified by a <functional unit, pipeline stage> pair. The - "num_funcUnit_uses" function returns the number of these "uses" or - XTENSA_UNDEFINED on error. The "funcUnit_use" function returns - a pointer to a "use" pair or null on error. */ - -typedef struct xtensa_funcUnit_use_struct -{ - xtensa_funcUnit unit; - int stage; -} xtensa_funcUnit_use; - -extern int -xtensa_opcode_num_funcUnit_uses (xtensa_isa isa, xtensa_opcode opc); - -extern xtensa_funcUnit_use * -xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u); - - - -/* Operand information. */ - -/* Get the name of an operand. Returns null on error. */ - -extern const char * -xtensa_operand_name (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Some operands are "invisible", i.e., not explicitly specified in - assembly language. When assembling an instruction, you need not set - the values of invisible operands, since they are either hardwired or - derived from other field values. The values of invisible operands - can be examined in the same way as other operands, but remember that - an invisible operand may get its value from another visible one, so - the entire instruction must be available before examining the - invisible operand values. This function returns 1 if an operand is - visible, 0 if it is invisible, or XTENSA_UNDEFINED on error. Note - that whether an operand is visible is orthogonal to whether it is - "implicit", i.e., whether it is encoded in a field in the - instruction. */ - -extern int -xtensa_operand_is_visible (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Check if an operand is an input ('i'), output ('o'), or inout ('m') - operand. Note: The output operand of a conditional assignment - (e.g., movnez) appears here as an inout ('m') even if it is declared - in the TIE code as an output ('o'); this allows the compiler to - properly handle register allocation for conditional assignments. - Returns 0 on error. */ - -extern char -xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Get and set the raw (encoded) value of the field for the specified - operand. The "set" function does not check if the value fits in the - field; that is done by the "encode" function below. Both of these - functions return non-zero on error, e.g., if the field is not defined - for the specified slot. */ - -extern int -xtensa_operand_get_field (xtensa_isa isa, xtensa_opcode opc, int opnd, - xtensa_format fmt, int slot, - const xtensa_insnbuf slotbuf, uint32 *valp); - -extern int -xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd, - xtensa_format fmt, int slot, - xtensa_insnbuf slotbuf, uint32 val); - - -/* Encode and decode operands. The raw bits in the operand field may - be encoded in a variety of different ways. These functions hide - the details of that encoding. The result values are returned through - the argument pointer. The return value is non-zero on error. */ - -extern int -xtensa_operand_encode (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp); - -extern int -xtensa_operand_decode (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp); - - -/* An operand may be either a register operand or an immediate of some - sort (e.g., PC-relative or not). The "is_register" function returns - 0 if the operand is an immediate, 1 if it is a register, and - XTENSA_UNDEFINED on error. The "regfile" function returns the - regfile for a register operand, or XTENSA_UNDEFINED on error. */ - -extern int -xtensa_operand_is_register (xtensa_isa isa, xtensa_opcode opc, int opnd); - -extern xtensa_regfile -xtensa_operand_regfile (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Register operands may span multiple consecutive registers, e.g., a - 64-bit data type may occupy two 32-bit registers. Only the first - register is encoded in the operand field. This function specifies - the number of consecutive registers occupied by this operand. For - non-register operands, the return value is undefined. Returns - XTENSA_UNDEFINED on error. */ - -extern int -xtensa_operand_num_regs (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Some register operands do not completely identify the register being - accessed. For example, the operand value may be added to an internal - state value. By definition, this implies that the corresponding - regfile is not allocatable. Unknown registers should generally be - treated with worst-case assumptions. The function returns 0 if the - register value is unknown, 1 if known, and XTENSA_UNDEFINED on - error. */ - -extern int -xtensa_operand_is_known_reg (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* Check if an immediate operand is PC-relative. Returns 0 for register - operands and non-PC-relative immediates, 1 for PC-relative - immediates, and XTENSA_UNDEFINED on error. */ - -extern int -xtensa_operand_is_PCrelative (xtensa_isa isa, xtensa_opcode opc, int opnd); - - -/* For PC-relative offset operands, the interpretation of the offset may - vary between opcodes, e.g., is it relative to the current PC or that - of the next instruction? The following functions are defined to - perform PC-relative relocations and to undo them (as in the - disassembler). The "do_reloc" function takes the desired address - value and the PC of the current instruction and sets the value to the - corresponding PC-relative offset (which can then be encoded and - stored into the operand field). The "undo_reloc" function takes the - unencoded offset value and the current PC and sets the value to the - appropriate address. The return values are non-zero on error. Note - that these functions do not replace the encode/decode functions; the - operands must be encoded/decoded separately and the encode functions - are responsible for detecting invalid operand values. */ - -extern int -xtensa_operand_do_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp, uint32 pc); - -extern int -xtensa_operand_undo_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp, uint32 pc); - - - -/* State Operands. */ - -/* Get the state accessed by a state operand. Returns XTENSA_UNDEFINED - on error. */ - -extern xtensa_state -xtensa_stateOperand_state (xtensa_isa isa, xtensa_opcode opc, int stOp); - - -/* Check if a state operand is an input ('i'), output ('o'), or inout - ('m') operand. Returns 0 on error. */ - -extern char -xtensa_stateOperand_inout (xtensa_isa isa, xtensa_opcode opc, int stOp); - - - -/* Interface Operands. */ - -/* Get the external interface accessed by an interface operand. - Returns XTENSA_UNDEFINED on error. */ - -extern xtensa_interface -xtensa_interfaceOperand_interface (xtensa_isa isa, xtensa_opcode opc, - int ifOp); - - - -/* Register Files. */ - -/* Regfiles include both "real" regfiles and "views", where a view - allows a group of adjacent registers in a real "parent" regfile to be - viewed as a single register. A regfile view has all the same - properties as its parent except for its (long) name, bit width, number - of entries, and default ctype. You can use the parent function to - distinguish these two classes. */ - -/* Look up a regfile by either its name or its abbreviated "short name". - Returns XTENSA_UNDEFINED on error. The "lookup_shortname" function - ignores "view" regfiles since they always have the same shortname as - their parents. */ - -extern xtensa_regfile -xtensa_regfile_lookup (xtensa_isa isa, const char *name); - -extern xtensa_regfile -xtensa_regfile_lookup_shortname (xtensa_isa isa, const char *shortname); - - -/* Get the name or abbreviated "short name" of a regfile. - Returns null on error. */ - -extern const char * -xtensa_regfile_name (xtensa_isa isa, xtensa_regfile rf); - -extern const char * -xtensa_regfile_shortname (xtensa_isa isa, xtensa_regfile rf); - - -/* Get the parent regfile of a "view" regfile. If the regfile is not a - view, the result is the same as the input parameter. Returns - XTENSA_UNDEFINED on error. */ - -extern xtensa_regfile -xtensa_regfile_view_parent (xtensa_isa isa, xtensa_regfile rf); - - -/* Get the bit width of a regfile or regfile view. - Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_regfile_num_bits (xtensa_isa isa, xtensa_regfile rf); - - -/* Get the number of regfile entries. Returns XTENSA_UNDEFINED on - error. */ - -extern int -xtensa_regfile_num_entries (xtensa_isa isa, xtensa_regfile rf); - - - -/* Processor States. */ - -/* Look up a state by name. Returns XTENSA_UNDEFINED on error. */ - -extern xtensa_state -xtensa_state_lookup (xtensa_isa isa, const char *name); - - -/* Get the name for a processor state. Returns null on error. */ - -extern const char * -xtensa_state_name (xtensa_isa isa, xtensa_state st); - - -/* Get the bit width for a processor state. - Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_state_num_bits (xtensa_isa isa, xtensa_state st); - - -/* Check if a state is exported from the processor core. Returns 0 if - the condition is false, 1 if the condition is true, and - XTENSA_UNDEFINED on error. */ - -extern int -xtensa_state_is_exported (xtensa_isa isa, xtensa_state st); - - - -/* Sysregs ("special registers" and "user registers"). */ - -/* Look up a register by its number and whether it is a "user register" - or a "special register". Returns XTENSA_UNDEFINED if the sysreg does - not exist. */ - -extern xtensa_sysreg -xtensa_sysreg_lookup (xtensa_isa isa, int num, int is_user); - - -/* Check if there exists a sysreg with a given name. - If not, this function returns XTENSA_UNDEFINED. */ - -extern xtensa_sysreg -xtensa_sysreg_lookup_name (xtensa_isa isa, const char *name); - - -/* Get the name of a sysreg. Returns null on error. */ - -extern const char * -xtensa_sysreg_name (xtensa_isa isa, xtensa_sysreg sysreg); - - -/* Get the register number. Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_sysreg_number (xtensa_isa isa, xtensa_sysreg sysreg); - - -/* Check if a sysreg is a "special register" or a "user register". - Returns 0 for special registers, 1 for user registers and - XTENSA_UNDEFINED on error. */ - -extern int -xtensa_sysreg_is_user (xtensa_isa isa, xtensa_sysreg sysreg); - - - -/* Interfaces. */ - -/* Find an interface by name. The return value is XTENSA_UNDEFINED if - the specified interface is not found. */ - -extern xtensa_interface -xtensa_interface_lookup (xtensa_isa isa, const char *ifname); - - -/* Get the name of an interface. Returns null on error. */ - -extern const char * -xtensa_interface_name (xtensa_isa isa, xtensa_interface intf); - - -/* Get the bit width for an interface. - Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_interface_num_bits (xtensa_isa isa, xtensa_interface intf); - - -/* Check if an interface is an input ('i') or output ('o') with respect - to the Xtensa processor core. Returns 0 on error. */ - -extern char -xtensa_interface_inout (xtensa_isa isa, xtensa_interface intf); - - -/* Check if accessing an interface has potential side effects. - Currently "data" interfaces have side effects and "control" - interfaces do not. Returns 1 if there are side effects, 0 if not, - and XTENSA_UNDEFINED on error. */ - -extern int -xtensa_interface_has_side_effect (xtensa_isa isa, xtensa_interface intf); - - -/* Some interfaces may be related such that accessing one interface - has side effects on a set of related interfaces. The interfaces - are partitioned into equivalence classes of related interfaces, and - each class is assigned a unique identifier number. This function - returns the class identifier for an interface, or XTENSA_UNDEFINED - on error. These identifiers can be compared to determine if two - interfaces are related; the specific values of the identifiers have - no particular meaning otherwise. */ - -extern int -xtensa_interface_class_id (xtensa_isa isa, xtensa_interface intf); - - - -/* Functional Units. */ - -/* Find a functional unit by name. The return value is XTENSA_UNDEFINED if - the specified unit is not found. */ - -extern xtensa_funcUnit -xtensa_funcUnit_lookup (xtensa_isa isa, const char *fname); - - -/* Get the name of a functional unit. Returns null on error. */ - -extern const char * -xtensa_funcUnit_name (xtensa_isa isa, xtensa_funcUnit fun); - - -/* Functional units may be replicated. See how many instances of a - particular function unit exist. Returns XTENSA_UNDEFINED on error. */ - -extern int -xtensa_funcUnit_num_copies (xtensa_isa isa, xtensa_funcUnit fun); - - -#ifdef __cplusplus -} -#endif -#endif /* XTENSA_LIBISA_H */ |