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Diffstat (limited to 'target/xtensa/xtensa-isa-internal.h')
| -rw-r--r-- | target/xtensa/xtensa-isa-internal.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/target/xtensa/xtensa-isa-internal.h b/target/xtensa/xtensa-isa-internal.h new file mode 100644 index 0000000000..c29295ff96 --- /dev/null +++ b/target/xtensa/xtensa-isa-internal.h @@ -0,0 +1,231 @@ +/* Internal definitions for the Xtensa ISA library. + * + * Copyright (c) 2004-2011 Tensilica Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef XTENSA_ISA_INTERNAL_H +#define XTENSA_ISA_INTERNAL_H + +#ifndef uint32 +#define uint32 uint32_t +#endif + +/* Flags. */ + +#define XTENSA_OPERAND_IS_REGISTER 0x00000001 +#define XTENSA_OPERAND_IS_PCRELATIVE 0x00000002 +#define XTENSA_OPERAND_IS_INVISIBLE 0x00000004 +#define XTENSA_OPERAND_IS_UNKNOWN 0x00000008 + +#define XTENSA_OPCODE_IS_BRANCH 0x00000001 +#define XTENSA_OPCODE_IS_JUMP 0x00000002 +#define XTENSA_OPCODE_IS_LOOP 0x00000004 +#define XTENSA_OPCODE_IS_CALL 0x00000008 + +#define XTENSA_STATE_IS_EXPORTED 0x00000001 +#define XTENSA_STATE_IS_SHARED_OR 0x00000002 + +#define XTENSA_INTERFACE_HAS_SIDE_EFFECT 0x00000001 + +/* Function pointer typedefs */ +typedef void (*xtensa_format_encode_fn)(xtensa_insnbuf); +typedef void (*xtensa_get_slot_fn)(const xtensa_insnbuf, xtensa_insnbuf); +typedef void (*xtensa_set_slot_fn)(xtensa_insnbuf, const xtensa_insnbuf); +typedef int (*xtensa_opcode_decode_fn)(const xtensa_insnbuf); +typedef uint32_t (*xtensa_get_field_fn)(const xtensa_insnbuf); +typedef void (*xtensa_set_field_fn)(xtensa_insnbuf, uint32_t); +typedef int (*xtensa_immed_decode_fn)(uint32_t *); +typedef int (*xtensa_immed_encode_fn)(uint32_t *); +typedef int (*xtensa_do_reloc_fn)(uint32_t *, uint32_t); +typedef int (*xtensa_undo_reloc_fn)(uint32_t *, uint32_t); +typedef void (*xtensa_opcode_encode_fn)(xtensa_insnbuf); +typedef int (*xtensa_format_decode_fn)(const xtensa_insnbuf); +typedef int (*xtensa_length_decode_fn)(const unsigned char *); + +typedef struct xtensa_format_internal_struct { + const char *name; /* Instruction format name. */ + int length; /* Instruction length in bytes. */ + xtensa_format_encode_fn encode_fn; + int num_slots; + int *slot_id; /* Array[num_slots] of slot IDs. */ +} xtensa_format_internal; + +typedef struct xtensa_slot_internal_struct { + const char *name; /* Not necessarily unique. */ + const char *format; + int position; + xtensa_get_slot_fn get_fn; + xtensa_set_slot_fn set_fn; + xtensa_get_field_fn *get_field_fns; /* Array[field_id]. */ + xtensa_set_field_fn *set_field_fns; /* Array[field_id]. */ + xtensa_opcode_decode_fn opcode_decode_fn; + const char *nop_name; +} xtensa_slot_internal; + +typedef struct xtensa_operand_internal_struct { + const char *name; + int field_id; + xtensa_regfile regfile; /* Register file. */ + int num_regs; /* Usually 1; 2 for reg pairs, etc. */ + uint32_t flags; /* See XTENSA_OPERAND_* flags. */ + xtensa_immed_encode_fn encode; /* Encode the operand value. */ + xtensa_immed_decode_fn decode; /* Decode the value from the field. */ + xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative reloc. */ + xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */ +} xtensa_operand_internal; + +typedef struct xtensa_arg_internal_struct { + union { + int operand_id; /* For normal operands. */ + xtensa_state state; /* For stateOperands. */ + } u; + char inout; /* Direction: 'i', 'o', or 'm'. */ +} xtensa_arg_internal; + +typedef struct xtensa_iclass_internal_struct { + int num_operands; /* Size of "operands" array. */ + xtensa_arg_internal *operands; /* Array[num_operands]. */ + + int num_stateOperands; /* Size of "stateOperands" array. */ + xtensa_arg_internal *stateOperands; /* Array[num_stateOperands]. */ + + int num_interfaceOperands; /* Size of "interfaceOperands". */ + xtensa_interface *interfaceOperands; /* Array[num_interfaceOperands]. */ +} xtensa_iclass_internal; + +typedef struct xtensa_opcode_internal_struct { + const char *name; /* Opcode mnemonic. */ + int iclass_id; /* Iclass for this opcode. */ + uint32_t flags; /* See XTENSA_OPCODE_* flags. */ + xtensa_opcode_encode_fn *encode_fns; /* Array[slot_id]. */ + int num_funcUnit_uses; /* Number of funcUnit_use entries. */ + xtensa_funcUnit_use *funcUnit_uses; /* Array[num_funcUnit_uses]. */ +} xtensa_opcode_internal; + +typedef struct xtensa_regfile_internal_struct { + const char *name; /* Full name of the regfile. */ + const char *shortname; /* Abbreviated name. */ + xtensa_regfile parent; /* View parent (or identity). */ + int num_bits; /* Width of the registers. */ + int num_entries; /* Number of registers. */ +} xtensa_regfile_internal; + +typedef struct xtensa_interface_internal_struct { + const char *name; /* Interface name. */ + int num_bits; /* Width of the interface. */ + uint32_t flags; /* See XTENSA_INTERFACE_* flags. */ + int class_id; /* Class of related interfaces. */ + char inout; /* "i" or "o". */ +} xtensa_interface_internal; + +typedef struct xtensa_funcUnit_internal_struct { + const char *name; /* Functional unit name. */ + int num_copies; /* Number of instances. */ +} xtensa_funcUnit_internal; + +typedef struct xtensa_state_internal_struct { + const char *name; /* State name. */ + int num_bits; /* Number of state bits. */ + uint32_t flags; /* See XTENSA_STATE_* flags. */ +} xtensa_state_internal; + +typedef struct xtensa_sysreg_internal_struct { + const char *name; /* Register name. */ + int number; /* Register number. */ + int is_user; /* Non-zero if a "user register". */ +} xtensa_sysreg_internal; + +typedef struct xtensa_lookup_entry_struct { + const char *key; + union { + xtensa_opcode opcode; /* Internal opcode number. */ + xtensa_sysreg sysreg; /* Internal sysreg number. */ + xtensa_state state; /* Internal state number. */ + xtensa_interface intf; /* Internal interface number. */ + xtensa_funcUnit fun; /* Internal funcUnit number. */ + } u; +} xtensa_lookup_entry; + +typedef struct xtensa_isa_internal_struct { + int is_big_endian; /* Endianness. */ + int insn_size; /* Maximum length in bytes. */ + int insnbuf_size; /* Number of insnbuf_words. */ + + int num_formats; + xtensa_format_internal *formats; + xtensa_format_decode_fn format_decode_fn; + xtensa_length_decode_fn length_decode_fn; + + int num_slots; + xtensa_slot_internal *slots; + + int num_fields; + + int num_operands; + xtensa_operand_internal *operands; + + int num_iclasses; + xtensa_iclass_internal *iclasses; + + int num_opcodes; + xtensa_opcode_internal *opcodes; + xtensa_lookup_entry *opname_lookup_table; + + int num_regfiles; + xtensa_regfile_internal *regfiles; + + int num_states; + xtensa_state_internal *states; + xtensa_lookup_entry *state_lookup_table; + + int num_sysregs; + xtensa_sysreg_internal *sysregs; + xtensa_lookup_entry *sysreg_lookup_table; + + /* + * The current Xtensa ISA only supports 256 of each kind of sysreg so + * we can get away with implementing lookups with tables indexed by + * the register numbers. If we ever allow larger sysreg numbers, this + * may have to be reimplemented. The first entry in the following + * arrays corresponds to "special" registers and the second to "user" + * registers. + */ + int max_sysreg_num[2]; + xtensa_sysreg *sysreg_table[2]; + + int num_interfaces; + xtensa_interface_internal *interfaces; + xtensa_lookup_entry *interface_lookup_table; + + int num_funcUnits; + xtensa_funcUnit_internal *funcUnits; + xtensa_lookup_entry *funcUnit_lookup_table; + + int num_stages; /* Number of pipe stages. */ +} xtensa_isa_internal; + +int xtensa_isa_name_compare(const void *, const void *); + +extern xtensa_isa_status xtisa_errno; +extern char xtisa_error_msg[]; + +#endif /* !XTENSA_ISA_INTERNAL_H */ |