diff options
Diffstat (limited to 'bfd/xtensa-isa.c')
| -rw-r--r-- | bfd/xtensa-isa.c | 1820 |
1 files changed, 336 insertions, 1484 deletions
diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c index 30ad80c..761e5c6 100644 --- a/bfd/xtensa-isa.c +++ b/bfd/xtensa-isa.c @@ -1,5 +1,5 @@ /* Configurable Xtensa ISA support. - Copyright 2003, 2004 Free Software Foundation, Inc. + Copyright 2003 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -17,1725 +17,577 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <string.h> + #include "xtensa-isa.h" #include "xtensa-isa-internal.h" -xtensa_isa_status xtisa_errno; -char xtisa_error_msg[1024]; - - -xtensa_isa_status -xtensa_isa_errno (xtensa_isa isa __attribute__ ((unused))) -{ - return xtisa_errno; -} - - -char * -xtensa_isa_error_msg (xtensa_isa isa __attribute__ ((unused))) -{ - return xtisa_error_msg; -} - - -#define CHECK_ALLOC(MEM,ERRVAL) \ - do { \ - if ((MEM) == 0) \ - { \ - xtisa_errno = xtensa_isa_out_of_memory; \ - strcpy (xtisa_error_msg, "out of memory"); \ - return (ERRVAL); \ - } \ - } while (0) - -#define CHECK_ALLOC_FOR_INIT(MEM,ERRVAL,ERRNO_P,ERROR_MSG_P) \ - do { \ - if ((MEM) == 0) \ - { \ - xtisa_errno = xtensa_isa_out_of_memory; \ - strcpy (xtisa_error_msg, "out of memory"); \ - if (ERRNO_P) *(ERRNO_P) = xtisa_errno; \ - if (ERROR_MSG_P) *(ERROR_MSG_P) = xtisa_error_msg; \ - return (ERRVAL); \ - } \ - } while (0) - - -/* Instruction buffers. */ - -int -xtensa_insnbuf_size (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->insnbuf_size; -} - - -xtensa_insnbuf -xtensa_insnbuf_alloc (xtensa_isa isa) -{ - xtensa_insnbuf result = (xtensa_insnbuf) - malloc (xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word)); - CHECK_ALLOC (result, 0); - return result; -} - - -void -xtensa_insnbuf_free (xtensa_isa isa __attribute__ ((unused)), - xtensa_insnbuf buf) -{ - free (buf); -} - - -/* Given <byte_index>, the index of a byte in a xtensa_insnbuf, our - internal representation of a xtensa instruction word, return the index of - its word and the bit index of its low order byte in the xtensa_insnbuf. */ - -static inline int -byte_to_word_index (int byte_index) -{ - return byte_index / sizeof (xtensa_insnbuf_word); -} - +xtensa_isa xtensa_default_isa = NULL; -static inline int -byte_to_bit_index (int byte_index) +static int +opname_lookup_compare (const void *v1, const void *v2) { - return (byte_index & 0x3) * 8; -} - - -/* Copy an instruction in the 32-bit words pointed at by "insn" to - characters pointed at by "cp". This is more complicated than you - might think because we want 16-bit instructions in bytes 2 & 3 for - big-endian configurations. This function allows us to specify - which byte in "insn" to start with and which way to increment, - allowing trivial implementation for both big- and little-endian - configurations....and it seems to make pretty good code for - both. */ - -int -xtensa_insnbuf_to_chars (xtensa_isa isa, const xtensa_insnbuf insn, char *cp, - int num_chars) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int insn_size = xtensa_isa_maxlength (isa); - int fence_post, start, increment, i, byte_count; - xtensa_format fmt; + opname_lookup_entry *e1 = (opname_lookup_entry *)v1; + opname_lookup_entry *e2 = (opname_lookup_entry *)v2; - if (num_chars == 0) - num_chars = insn_size; - - if (intisa->is_big_endian) - { - start = insn_size - 1; - increment = -1; - } - else - { - start = 0; - increment = 1; - } - - /* Find the instruction format. Do nothing if the buffer does not contain - a valid instruction since we need to know how many bytes to copy. */ - fmt = xtensa_format_decode (isa, insn); - if (fmt == XTENSA_UNDEFINED) - return XTENSA_UNDEFINED; - - byte_count = xtensa_format_length (isa, fmt); - if (byte_count == XTENSA_UNDEFINED) - return XTENSA_UNDEFINED; - - if (byte_count > num_chars) - { - xtisa_errno = xtensa_isa_buffer_overflow; - strcpy (xtisa_error_msg, "output buffer too small for instruction"); - return XTENSA_UNDEFINED; - } - - fence_post = start + (byte_count * increment); - - for (i = start; i != fence_post; i += increment, ++cp) - { - int word_inx = byte_to_word_index (i); - int bit_inx = byte_to_bit_index (i); - - *cp = (insn[word_inx] >> bit_inx) & 0xff; - } - - return byte_count; + return strcmp (e1->key, e2->key); } -/* Inward conversion from byte stream to xtensa_insnbuf. See - xtensa_insnbuf_to_chars for a discussion of why this is complicated - by endianness. */ - -void -xtensa_insnbuf_from_chars (xtensa_isa isa, xtensa_insnbuf insn, const char *cp, - int num_chars) +xtensa_isa +xtensa_isa_init (void) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int max_size, insn_size, fence_post, start, increment, i; + xtensa_isa isa; + int mod; - max_size = xtensa_isa_maxlength (isa); - - /* Decode the instruction length so we know how many bytes to read. */ - insn_size = (intisa->length_decode_fn) (cp); - if (insn_size == XTENSA_UNDEFINED) + isa = xtensa_load_isa (0); + if (isa == 0) { - /* This should never happen when the byte stream contains a - valid instruction. Just read the maximum number of bytes.... */ - insn_size = max_size; + fprintf (stderr, "Failed to initialize Xtensa base ISA module\n"); + return NULL; } - if (num_chars == 0 || num_chars > insn_size) - num_chars = insn_size; - - if (intisa->is_big_endian) + for (mod = 1; xtensa_isa_modules[mod].get_num_opcodes_fn; mod++) { - start = max_size - 1; - increment = -1; - } - else - { - start = 0; - increment = 1; + if (!xtensa_extend_isa (isa, mod)) + { + fprintf (stderr, "Failed to initialize Xtensa TIE ISA module\n"); + return NULL; + } } - fence_post = start + (num_chars * increment); - memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word)); - - for (i = start; i != fence_post; i += increment, ++cp) - { - int word_inx = byte_to_word_index (i); - int bit_inx = byte_to_bit_index (i); - - insn[word_inx] |= (*cp & 0xff) << bit_inx; - } + return isa; } - - /* ISA information. */ -extern xtensa_isa_internal xtensa_modules; - -xtensa_isa -xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) +static int +xtensa_check_isa_config (xtensa_isa_internal *isa, + struct config_struct *config_table) { - xtensa_isa_internal *isa = &xtensa_modules; - int n, is_user; - - /* Set up the opcode name lookup table. */ - isa->opname_lookup_table = - bfd_malloc (isa->num_opcodes * sizeof (xtensa_lookup_entry)); - CHECK_ALLOC_FOR_INIT (isa->opname_lookup_table, NULL, errno_p, error_msg_p); - for (n = 0; n < isa->num_opcodes; n++) - { - isa->opname_lookup_table[n].key = isa->opcodes[n].name; - isa->opname_lookup_table[n].u.opcode = n; - } - qsort (isa->opname_lookup_table, isa->num_opcodes, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + int i, j; - /* Set up the state name lookup table. */ - isa->state_lookup_table = - bfd_malloc (isa->num_states * sizeof (xtensa_lookup_entry)); - CHECK_ALLOC_FOR_INIT (isa->state_lookup_table, NULL, errno_p, error_msg_p); - for (n = 0; n < isa->num_states; n++) + if (!config_table) { - isa->state_lookup_table[n].key = isa->states[n].name; - isa->state_lookup_table[n].u.state = n; + fprintf (stderr, "Error: Empty configuration table in ISA DLL\n"); + return 0; } - qsort (isa->state_lookup_table, isa->num_states, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - /* Set up the sysreg name lookup table. */ - isa->sysreg_lookup_table = - bfd_malloc (isa->num_sysregs * sizeof (xtensa_lookup_entry)); - CHECK_ALLOC_FOR_INIT (isa->sysreg_lookup_table, NULL, errno_p, error_msg_p); - for (n = 0; n < isa->num_sysregs; n++) - { - isa->sysreg_lookup_table[n].key = isa->sysregs[n].name; - isa->sysreg_lookup_table[n].u.sysreg = n; - } - qsort (isa->sysreg_lookup_table, isa->num_sysregs, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - /* Set up the user & system sysreg number tables. */ - for (is_user = 0; is_user < 2; is_user++) - { - isa->sysreg_table[is_user] = - bfd_malloc ((isa->max_sysreg_num[is_user] + 1) - * sizeof (xtensa_sysreg)); - CHECK_ALLOC_FOR_INIT (isa->sysreg_table[is_user], NULL, - errno_p, error_msg_p); - - for (n = 0; n <= isa->max_sysreg_num[is_user]; n++) - isa->sysreg_table[is_user][n] = XTENSA_UNDEFINED; - } - for (n = 0; n < isa->num_sysregs; n++) - { - xtensa_sysreg_internal *sreg = &isa->sysregs[n]; - is_user = sreg->is_user; - - isa->sysreg_table[is_user][sreg->number] = n; - } - - /* Set up the interface lookup table. */ - isa->interface_lookup_table = - bfd_malloc (isa->num_interfaces * sizeof (xtensa_lookup_entry)); - CHECK_ALLOC_FOR_INIT (isa->interface_lookup_table, NULL, errno_p, - error_msg_p); - for (n = 0; n < isa->num_interfaces; n++) - { - isa->interface_lookup_table[n].key = isa->interfaces[n].name; - isa->interface_lookup_table[n].u.intf = n; - } - qsort (isa->interface_lookup_table, isa->num_interfaces, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - /* Set up the funcUnit lookup table. */ - isa->funcUnit_lookup_table = - bfd_malloc (isa->num_funcUnits * sizeof (xtensa_lookup_entry)); - CHECK_ALLOC_FOR_INIT (isa->funcUnit_lookup_table, NULL, errno_p, - error_msg_p); - for (n = 0; n < isa->num_funcUnits; n++) - { - isa->funcUnit_lookup_table[n].key = isa->funcUnits[n].name; - isa->funcUnit_lookup_table[n].u.fun = n; - } - qsort (isa->funcUnit_lookup_table, isa->num_funcUnits, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) / - sizeof (xtensa_insnbuf_word)); - - return (xtensa_isa) isa; -} + /* For the first module, save a pointer to the table and record the + specified endianness and availability of the density option. */ -void -xtensa_isa_free (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int n; - - /* With this version of the code, the xtensa_isa structure is not - dynamically allocated, so this function is not essential. Free - the memory allocated by xtensa_isa_init and restore the xtensa_isa - structure to its initial state. */ - - if (intisa->opname_lookup_table) + if (isa->num_modules == 0) { - free (intisa->opname_lookup_table); - intisa->opname_lookup_table = 0; - } + int found_memory_order = 0; - if (intisa->state_lookup_table) - { - free (intisa->state_lookup_table); - intisa->state_lookup_table = 0; - } + isa->config = config_table; + isa->has_density = 1; /* Default to have density option. */ - if (intisa->sysreg_lookup_table) - { - free (intisa->sysreg_lookup_table); - intisa->sysreg_lookup_table = 0; - } - for (n = 0; n < 2; n++) - { - if (intisa->sysreg_table[n]) + for (i = 0; config_table[i].param_name; i++) { - free (intisa->sysreg_table[n]); - intisa->sysreg_table[n] = 0; + if (!strcmp (config_table[i].param_name, "IsaMemoryOrder")) + { + isa->is_big_endian = + (strcmp (config_table[i].param_value, "BigEndian") == 0); + found_memory_order = 1; + } + if (!strcmp (config_table[i].param_name, "IsaUseDensityInstruction")) + { + isa->has_density = atoi (config_table[i].param_value); + } + } + if (!found_memory_order) + { + fprintf (stderr, "Error: \"IsaMemoryOrder\" missing from " + "configuration table in ISA DLL\n"); + return 0; } - } - - if (intisa->interface_lookup_table) - { - free (intisa->interface_lookup_table); - intisa->interface_lookup_table = 0; - } - if (intisa->funcUnit_lookup_table) - { - free (intisa->funcUnit_lookup_table); - intisa->funcUnit_lookup_table = 0; + return 1; } -} - - -int -xtensa_isa_name_compare (const void *v1, const void *v2) -{ - xtensa_lookup_entry *e1 = (xtensa_lookup_entry *) v1; - xtensa_lookup_entry *e2 = (xtensa_lookup_entry *) v2; - - return strcasecmp (e1->key, e2->key); -} - - -int -xtensa_isa_maxlength (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->insn_size; -} - - -int -xtensa_isa_length_from_chars (xtensa_isa isa, const char *cp) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return (intisa->length_decode_fn) (cp); -} + /* For subsequent modules, check that the parameters match. Note: This + code is sufficient to handle the current model where there are never + more than 2 modules; we might at some point want to handle cases where + module N > 0 specifies some parameters not included in the base table, + and we would then add those to isa->config so that subsequent modules + would check against them. */ -int -xtensa_isa_num_pipe_stages (xtensa_isa isa) -{ - int num_opcodes, num_uses; - xtensa_opcode opcode; - xtensa_funcUnit_use *use; - int i, stage, max_stage = XTENSA_UNDEFINED; - - num_opcodes = xtensa_isa_num_opcodes (isa); - for (opcode = 0; opcode < num_opcodes; opcode++) + for (i = 0; config_table[i].param_name; i++) { - num_uses = xtensa_opcode_num_funcUnit_uses (isa, opcode); - for (i = 0; i < num_uses; i++) + for (j = 0; isa->config[j].param_name; j++) { - use = xtensa_opcode_funcUnit_use (isa, opcode, i); - stage = use->stage; - if (stage > max_stage) - max_stage = stage; + if (!strcmp (config_table[i].param_name, isa->config[j].param_name)) + { + int mismatch; + if (!strcmp (config_table[i].param_name, "IsaCoprocessorCount")) + { + /* Only require the coprocessor count to be <= the base. */ + int tiecnt = atoi (config_table[i].param_value); + int basecnt = atoi (isa->config[j].param_value); + mismatch = (tiecnt > basecnt); + } + else + mismatch = strcmp (config_table[i].param_value, + isa->config[j].param_value); + if (mismatch) + { +#define MISMATCH_MESSAGE \ +"Error: Configuration mismatch in the \"%s\" parameter:\n\ +the configuration used when the TIE file was compiled had a value of\n\ +\"%s\", while the current configuration has a value of\n\ +\"%s\". Please rerun the TIE compiler with a matching\n\ +configuration.\n" + fprintf (stderr, MISMATCH_MESSAGE, + config_table[i].param_name, + config_table[i].param_value, + isa->config[j].param_value); + return 0; + } + break; + } } } - return max_stage + 1; -} - - -int -xtensa_isa_num_formats (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_formats; + return 1; } -int -xtensa_isa_num_opcodes (xtensa_isa isa) +static int +xtensa_add_isa (xtensa_isa_internal *isa, libisa_module_specifier libisa) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_opcodes; -} + int (*get_num_opcodes_fn) (void); + struct config_struct *(*get_config_table_fn) (void); + xtensa_opcode_internal **(*get_opcodes_fn) (void); + int (*decode_insn_fn) (const xtensa_insnbuf); + xtensa_opcode_internal **opcodes; + int opc, insn_size, prev_num_opcodes, new_num_opcodes, this_module; + get_num_opcodes_fn = xtensa_isa_modules[libisa].get_num_opcodes_fn; + get_opcodes_fn = xtensa_isa_modules[libisa].get_opcodes_fn; + decode_insn_fn = xtensa_isa_modules[libisa].decode_insn_fn; + get_config_table_fn = xtensa_isa_modules[libisa].get_config_table_fn; -int -xtensa_isa_num_regfiles (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_regfiles; -} - - -int -xtensa_isa_num_states (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_states; -} - + if (!get_num_opcodes_fn || !get_opcodes_fn || !decode_insn_fn + || (!get_config_table_fn && isa->num_modules == 0)) + return 0; -int -xtensa_isa_num_sysregs (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_sysregs; -} + if (get_config_table_fn + && !xtensa_check_isa_config (isa, get_config_table_fn ())) + return 0; + prev_num_opcodes = isa->num_opcodes; + new_num_opcodes = (*get_num_opcodes_fn) (); -int -xtensa_isa_num_interfaces (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_interfaces; -} + isa->num_opcodes += new_num_opcodes; + isa->opcode_table = (xtensa_opcode_internal **) + realloc (isa->opcode_table, isa->num_opcodes * + sizeof (xtensa_opcode_internal *)); + isa->opname_lookup_table = (opname_lookup_entry *) + realloc (isa->opname_lookup_table, isa->num_opcodes * + sizeof (opname_lookup_entry)); + opcodes = (*get_opcodes_fn) (); -int -xtensa_isa_num_funcUnits (xtensa_isa isa) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_funcUnits; -} + insn_size = isa->insn_size; + for (opc = 0; opc < new_num_opcodes; opc++) + { + xtensa_opcode_internal *intopc = opcodes[opc]; + int newopc = prev_num_opcodes + opc; + isa->opcode_table[newopc] = intopc; + isa->opname_lookup_table[newopc].key = intopc->name; + isa->opname_lookup_table[newopc].opcode = newopc; + if (intopc->length > insn_size) + insn_size = intopc->length; + } + isa->insn_size = insn_size; + isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) / + sizeof (xtensa_insnbuf_word)); - -/* Instruction formats. */ + qsort (isa->opname_lookup_table, isa->num_opcodes, + sizeof (opname_lookup_entry), opname_lookup_compare); + /* Check for duplicate opcode names. */ + for (opc = 1; opc < isa->num_opcodes; opc++) + { + if (!opname_lookup_compare (&isa->opname_lookup_table[opc-1], + &isa->opname_lookup_table[opc])) + { + fprintf (stderr, "Error: Duplicate TIE opcode \"%s\"\n", + isa->opname_lookup_table[opc].key); + return 0; + } + } -#define CHECK_FORMAT(INTISA,FMT,ERRVAL) \ - do { \ - if ((FMT) < 0 || (FMT) >= (INTISA)->num_formats) \ - { \ - xtisa_errno = xtensa_isa_bad_format; \ - strcpy (xtisa_error_msg, "invalid format specifier"); \ - return (ERRVAL); \ - } \ - } while (0) + this_module = isa->num_modules; + isa->num_modules += 1; + isa->module_opcode_base = (int *) realloc (isa->module_opcode_base, + isa->num_modules * sizeof (int)); + isa->module_decode_fn = (xtensa_insn_decode_fn *) + realloc (isa->module_decode_fn, isa->num_modules * + sizeof (xtensa_insn_decode_fn)); -#define CHECK_SLOT(INTISA,FMT,SLOT,ERRVAL) \ - do { \ - if ((SLOT) < 0 || (SLOT) >= (INTISA)->formats[FMT].num_slots) \ - { \ - xtisa_errno = xtensa_isa_bad_slot; \ - strcpy (xtisa_error_msg, "invalid slot specifier"); \ - return (ERRVAL); \ - } \ - } while (0) + isa->module_opcode_base[this_module] = prev_num_opcodes; + isa->module_decode_fn[this_module] = decode_insn_fn; + xtensa_default_isa = isa; -const char * -xtensa_format_name (xtensa_isa isa, xtensa_format fmt) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FORMAT (intisa, fmt, NULL); - return intisa->formats[fmt].name; + return 1; /* Library was successfully added. */ } -xtensa_format -xtensa_format_lookup (xtensa_isa isa, const char *fmtname) +xtensa_isa +xtensa_load_isa (libisa_module_specifier libisa) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int fmt; + xtensa_isa_internal *isa; - if (!fmtname || !*fmtname) + isa = (xtensa_isa_internal *) malloc (sizeof (xtensa_isa_internal)); + memset (isa, 0, sizeof (xtensa_isa_internal)); + if (!xtensa_add_isa (isa, libisa)) { - xtisa_errno = xtensa_isa_bad_format; - strcpy (xtisa_error_msg, "invalid format name"); - return XTENSA_UNDEFINED; - } - - for (fmt = 0; fmt < intisa->num_formats; fmt++) - { - if (strcasecmp (fmtname, intisa->formats[fmt].name) == 0) - return fmt; + xtensa_isa_free (isa); + return NULL; } - - xtisa_errno = xtensa_isa_bad_format; - sprintf (xtisa_error_msg, "format \"%s\" not recognized", fmtname); - return XTENSA_UNDEFINED; -} - - -xtensa_format -xtensa_format_decode (xtensa_isa isa, const xtensa_insnbuf insn) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_format fmt; - - fmt = (intisa->format_decode_fn) (insn); - if (fmt != XTENSA_UNDEFINED) - return fmt; - - xtisa_errno = xtensa_isa_bad_format; - strcpy (xtisa_error_msg, "cannot decode instruction format"); - return XTENSA_UNDEFINED; + return (xtensa_isa) isa; } int -xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn) +xtensa_extend_isa (xtensa_isa isa, libisa_module_specifier libisa) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FORMAT (intisa, fmt, -1); - (*intisa->formats[fmt].encode_fn) (insn); - return 0; + return xtensa_add_isa (intisa, libisa); } -int -xtensa_format_length (xtensa_isa isa, xtensa_format fmt) +void +xtensa_isa_free (xtensa_isa isa) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); - return intisa->formats[fmt].length; + if (intisa->opcode_table) + free (intisa->opcode_table); + if (intisa->opname_lookup_table) + free (intisa->opname_lookup_table); + if (intisa->module_opcode_base) + free (intisa->module_opcode_base); + if (intisa->module_decode_fn) + free (intisa->module_decode_fn); + free (intisa); } int -xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); - return intisa->formats[fmt].num_slots; -} - - -xtensa_opcode -xtensa_format_slot_nop_opcode (xtensa_isa isa, xtensa_format fmt, int slot) +xtensa_insn_maxlength (xtensa_isa isa) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int slot_id; - - CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); - CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED); - - slot_id = intisa->formats[fmt].slot_id[slot]; - return xtensa_opcode_lookup (isa, intisa->slots[slot_id].nop_name); + return intisa->insn_size; } int -xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot, - const xtensa_insnbuf insn, xtensa_insnbuf slotbuf) +xtensa_insnbuf_size (xtensa_isa isa) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int slot_id; - - CHECK_FORMAT (intisa, fmt, -1); - CHECK_SLOT (intisa, fmt, slot, -1); - - slot_id = intisa->formats[fmt].slot_id[slot]; - (*intisa->slots[slot_id].get_fn) (insn, slotbuf); - return 0; + xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa; + return intisa->insnbuf_size; } int -xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot, - xtensa_insnbuf insn, const xtensa_insnbuf slotbuf) +xtensa_num_opcodes (xtensa_isa isa) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int slot_id; - - CHECK_FORMAT (intisa, fmt, -1); - CHECK_SLOT (intisa, fmt, slot, -1); - - slot_id = intisa->formats[fmt].slot_id[slot]; - (*intisa->slots[slot_id].set_fn) (insn, slotbuf); - return 0; + return intisa->num_opcodes; } - -/* Opcode information. */ - - -#define CHECK_OPCODE(INTISA,OPC,ERRVAL) \ - do { \ - if ((OPC) < 0 || (OPC) >= (INTISA)->num_opcodes) \ - { \ - xtisa_errno = xtensa_isa_bad_opcode; \ - strcpy (xtisa_error_msg, "invalid opcode specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - xtensa_opcode xtensa_opcode_lookup (xtensa_isa isa, const char *opname) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_lookup_entry entry, *result; - - if (!opname || !*opname) - { - xtisa_errno = xtensa_isa_bad_opcode; - strcpy (xtisa_error_msg, "invalid opcode name"); - return XTENSA_UNDEFINED; - } + opname_lookup_entry entry, *result; entry.key = opname; result = bsearch (&entry, intisa->opname_lookup_table, intisa->num_opcodes, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - if (!result) - { - xtisa_errno = xtensa_isa_bad_opcode; - sprintf (xtisa_error_msg, "opcode \"%s\" not recognized", opname); - return XTENSA_UNDEFINED; - } - - return result->u.opcode; + sizeof (opname_lookup_entry), opname_lookup_compare); + if (!result) return XTENSA_UNDEFINED; + return result->opcode; } xtensa_opcode -xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot, - const xtensa_insnbuf slotbuf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int slot_id; - xtensa_opcode opc; - - CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); - CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED); - - slot_id = intisa->formats[fmt].slot_id[slot]; - - opc = (intisa->slots[slot_id].opcode_decode_fn) (slotbuf); - if (opc == XTENSA_UNDEFINED) - { - xtisa_errno = xtensa_isa_bad_opcode; - strcpy (xtisa_error_msg, "cannot decode opcode"); - } - return opc; -} - - -int -xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot, - xtensa_insnbuf slotbuf, xtensa_opcode opc) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int slot_id; - xtensa_opcode_encode_fn encode_fn; - - CHECK_FORMAT (intisa, fmt, -1); - CHECK_SLOT (intisa, fmt, slot, -1); - CHECK_OPCODE (intisa, opc, -1); - - slot_id = intisa->formats[fmt].slot_id[slot]; - encode_fn = intisa->opcodes[opc].encode_fns[slot_id]; - if (!encode_fn) - { - xtisa_errno = xtensa_isa_wrong_slot; - sprintf (xtisa_error_msg, - "opcode \"%s\" is not allowed in slot %d of format \"%s\"", - intisa->opcodes[opc].name, slot, intisa->formats[fmt].name); - return -1; - } - (*encode_fn) (slotbuf); - return 0; -} - - -const char * -xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc) +xtensa_decode_insn (xtensa_isa isa, const xtensa_insnbuf insn) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, NULL); - return intisa->opcodes[opc].name; + int n, opc; + for (n = 0; n < intisa->num_modules; n++) { + opc = (intisa->module_decode_fn[n]) (insn); + if (opc != XTENSA_UNDEFINED) + return intisa->module_opcode_base[n] + opc; + } + return XTENSA_UNDEFINED; } -int -xtensa_opcode_is_branch (xtensa_isa isa, xtensa_opcode opc) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_BRANCH) != 0) - return 1; - return 0; -} - +/* Opcode information. */ -int -xtensa_opcode_is_jump (xtensa_isa isa, xtensa_opcode opc) +void +xtensa_encode_insn (xtensa_isa isa, xtensa_opcode opc, xtensa_insnbuf insn) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_JUMP) != 0) - return 1; - return 0; -} - + xtensa_insnbuf template = intisa->opcode_table[opc]->template(); + int len = intisa->opcode_table[opc]->length; + int n; -int -xtensa_opcode_is_loop (xtensa_isa isa, xtensa_opcode opc) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_LOOP) != 0) - return 1; - return 0; -} + /* Convert length to 32-bit words. */ + len = (len + 3) / 4; + /* Copy the template. */ + for (n = 0; n < len; n++) + insn[n] = template[n]; -int -xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_CALL) != 0) - return 1; - return 0; + /* Fill any unused buffer space with zeros. */ + for ( ; n < intisa->insnbuf_size; n++) + insn[n] = 0; } -int -xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc) +const char * +xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int iclass_id; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - return intisa->iclasses[iclass_id].num_operands; + return intisa->opcode_table[opc]->name; } int -xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc) +xtensa_insn_length (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int iclass_id; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - return intisa->iclasses[iclass_id].num_stateOperands; + return intisa->opcode_table[opc]->length; } int -xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc) +xtensa_insn_length_from_first_byte (xtensa_isa isa, char first_byte) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int iclass_id; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - return intisa->iclasses[iclass_id].num_interfaceOperands; + int is_density = (first_byte & (intisa->is_big_endian ? 0x80 : 0x08)) != 0; + return (intisa->has_density && is_density ? 2 : 3); } int -xtensa_opcode_num_funcUnit_uses (xtensa_isa isa, xtensa_opcode opc) +xtensa_num_operands (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - return intisa->opcodes[opc].num_funcUnit_uses; + return intisa->opcode_table[opc]->iclass->num_operands; } -xtensa_funcUnit_use * -xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u) +xtensa_operand +xtensa_get_operand (xtensa_isa isa, xtensa_opcode opc, int opnd) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_OPCODE (intisa, opc, NULL); - if (u < 0 || u >= intisa->opcodes[opc].num_funcUnit_uses) - { - xtisa_errno = xtensa_isa_bad_funcUnit; - sprintf (xtisa_error_msg, "invalid functional unit use number (%d); " - "opcode \"%s\" has %d", u, intisa->opcodes[opc].name, - intisa->opcodes[opc].num_funcUnit_uses); - return NULL; - } - return &intisa->opcodes[opc].funcUnit_uses[u]; + xtensa_iclass_internal *iclass = intisa->opcode_table[opc]->iclass; + if (opnd >= iclass->num_operands) + return NULL; + return (xtensa_operand) iclass->operands[opnd]; } - /* Operand information. */ - -#define CHECK_OPERAND(INTISA,OPC,ICLASS,OPND,ERRVAL) \ - do { \ - if ((OPND) < 0 || (OPND) >= (ICLASS)->num_operands) \ - { \ - xtisa_errno = xtensa_isa_bad_operand; \ - sprintf (xtisa_error_msg, "invalid operand number (%d); " \ - "opcode \"%s\" has %d operands", (OPND), \ - (INTISA)->opcodes[(OPC)].name, (ICLASS)->num_operands); \ - return (ERRVAL); \ - } \ - } while (0) - - -static xtensa_operand_internal * -get_operand (xtensa_isa_internal *intisa, xtensa_opcode opc, int opnd) -{ - xtensa_iclass_internal *iclass; - int iclass_id, operand_id; - - CHECK_OPCODE (intisa, opc, NULL); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_OPERAND (intisa, opc, iclass, opnd, NULL); - operand_id = iclass->operands[opnd].u.operand_id; - return &intisa->operands[operand_id]; -} - - -const char * -xtensa_operand_name (xtensa_isa isa, xtensa_opcode opc, int opnd) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return NULL; - return intop->name; -} - - -int -xtensa_operand_is_visible (xtensa_isa isa, xtensa_opcode opc, int opnd) +char * +xtensa_operand_kind (xtensa_operand opnd) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass; - int iclass_id, operand_id; - xtensa_operand_internal *intop; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_OPERAND (intisa, opc, iclass, opnd, XTENSA_UNDEFINED); - - /* Special case for "sout" operands. */ - if (iclass->operands[opnd].inout == 's') - return 0; - - operand_id = iclass->operands[opnd].u.operand_id; - intop = &intisa->operands[operand_id]; - - if ((intop->flags & XTENSA_OPERAND_IS_INVISIBLE) == 0) - return 1; - return 0; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return intop->operand_kind; } char -xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass; - int iclass_id; - char inout; - - CHECK_OPCODE (intisa, opc, 0); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_OPERAND (intisa, opc, iclass, opnd, 0); - inout = iclass->operands[opnd].inout; - - /* Special case for "sout" operands. */ - if (inout == 's') - return 'o'; - - return inout; -} - - -int -xtensa_operand_get_field (xtensa_isa isa, xtensa_opcode opc, int opnd, - xtensa_format fmt, int slot, - const xtensa_insnbuf slotbuf, uint32 *valp) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - int slot_id; - xtensa_get_field_fn get_fn; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - CHECK_FORMAT (intisa, fmt, -1); - CHECK_SLOT (intisa, fmt, slot, -1); - - slot_id = intisa->formats[fmt].slot_id[slot]; - if (intop->field_id == XTENSA_UNDEFINED) - { - xtisa_errno = xtensa_isa_no_field; - strcpy (xtisa_error_msg, "implicit operand has no field"); - return -1; - } - get_fn = intisa->slots[slot_id].get_field_fns[intop->field_id]; - if (!get_fn) - { - xtisa_errno = xtensa_isa_wrong_slot; - sprintf (xtisa_error_msg, - "operand \"%s\" does not exist in slot %d of format \"%s\"", - intop->name, slot, intisa->formats[fmt].name); - return -1; - } - *valp = (*get_fn) (slotbuf); - return 0; -} - - -int -xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd, - xtensa_format fmt, int slot, - xtensa_insnbuf slotbuf, uint32 val) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - int slot_id; - xtensa_set_field_fn set_fn; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - CHECK_FORMAT (intisa, fmt, -1); - CHECK_SLOT (intisa, fmt, slot, -1); - - slot_id = intisa->formats[fmt].slot_id[slot]; - if (intop->field_id == XTENSA_UNDEFINED) - { - xtisa_errno = xtensa_isa_no_field; - strcpy (xtisa_error_msg, "implicit operand has no field"); - return -1; - } - set_fn = intisa->slots[slot_id].set_field_fns[intop->field_id]; - if (!set_fn) - { - xtisa_errno = xtensa_isa_wrong_slot; - sprintf (xtisa_error_msg, - "operand \"%s\" does not exist in slot %d of format \"%s\"", - intop->name, slot, intisa->formats[fmt].name); - return -1; - } - (*set_fn) (slotbuf, val); - return 0; -} - - -int -xtensa_operand_encode (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - uint32 test_val, orig_val; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - if (!intop->encode) - { - /* This is a default operand for a field. How can we tell if the - value fits in the field? Write the value into the field, - read it back, and then make sure we get the same value. */ - - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - static xtensa_insnbuf tmpbuf = 0; - int slot_id; - - if (!tmpbuf) - { - tmpbuf = xtensa_insnbuf_alloc (isa); - CHECK_ALLOC (tmpbuf, -1); - } - - /* A default operand is always associated with a field, - but check just to be sure.... */ - if (intop->field_id == XTENSA_UNDEFINED) - { - xtisa_errno = xtensa_isa_internal_error; - strcpy (xtisa_error_msg, "operand has no field"); - return -1; - } - - /* Find some slot that includes the field. */ - for (slot_id = 0; slot_id < intisa->num_slots; slot_id++) - { - xtensa_get_field_fn get_fn = - intisa->slots[slot_id].get_field_fns[intop->field_id]; - xtensa_set_field_fn set_fn = - intisa->slots[slot_id].set_field_fns[intop->field_id]; - - if (get_fn && set_fn) - { - (*set_fn) (tmpbuf, *valp); - return ((*get_fn) (tmpbuf) != *valp); - } - } - - /* Couldn't find any slot containing the field.... */ - xtisa_errno = xtensa_isa_no_field; - strcpy (xtisa_error_msg, "field does not exist in any slot"); - return -1; - } - - /* Encode the value. In some cases, the encoding function may detect - errors, but most of the time the only way to determine if the value - was successfully encoded is to decode it and check if it matches - the original value. */ - orig_val = *valp; - if ((*intop->encode) (valp) || - (test_val = *valp, (*intop->decode) (&test_val)) || - test_val != orig_val) - { - xtisa_errno = xtensa_isa_bad_value; - sprintf (xtisa_error_msg, "cannot encode operand value 0x%08x", *valp); - return -1; - } - - return 0; -} - - -int -xtensa_operand_decode (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - /* Use identity function for "default" operands. */ - if (!intop->decode) - return 0; - - if ((*intop->decode) (valp)) - { - xtisa_errno = xtensa_isa_bad_value; - sprintf (xtisa_error_msg, "cannot decode operand value 0x%08x", *valp); - return -1; - } - return 0; -} - - -int -xtensa_operand_is_register (xtensa_isa isa, xtensa_opcode opc, int opnd) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return XTENSA_UNDEFINED; - - if ((intop->flags & XTENSA_OPERAND_IS_REGISTER) != 0) - return 1; - return 0; -} - - -xtensa_regfile -xtensa_operand_regfile (xtensa_isa isa, xtensa_opcode opc, int opnd) +xtensa_operand_inout (xtensa_operand opnd) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return XTENSA_UNDEFINED; - - return intop->regfile; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return intop->inout; } -int -xtensa_operand_num_regs (xtensa_isa isa, xtensa_opcode opc, int opnd) +uint32 +xtensa_operand_get_field (xtensa_operand opnd, const xtensa_insnbuf insn) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return XTENSA_UNDEFINED; - - return intop->num_regs; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return (*intop->get_field) (insn); } -int -xtensa_operand_is_known_reg (xtensa_isa isa, xtensa_opcode opc, int opnd) +void +xtensa_operand_set_field (xtensa_operand opnd, xtensa_insnbuf insn, uint32 val) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return XTENSA_UNDEFINED; - - if ((intop->flags & XTENSA_OPERAND_IS_UNKNOWN) == 0) - return 1; - return 0; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return (*intop->set_field) (insn, val); } -int -xtensa_operand_is_PCrelative (xtensa_isa isa, xtensa_opcode opc, int opnd) +xtensa_encode_result +xtensa_operand_encode (xtensa_operand opnd, uint32 *valp) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return XTENSA_UNDEFINED; - - if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) != 0) - return 1; - return 0; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return (*intop->encode) (valp); } -int -xtensa_operand_do_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp, uint32 pc) +uint32 +xtensa_operand_decode (xtensa_operand opnd, uint32 val) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) - return 0; - - if (!intop->do_reloc) - { - xtisa_errno = xtensa_isa_internal_error; - strcpy (xtisa_error_msg, "operand missing do_reloc function"); - return -1; - } - - if ((*intop->do_reloc) (valp, pc)) - { - xtisa_errno = xtensa_isa_bad_value; - sprintf (xtisa_error_msg, - "do_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc); - return -1; - } - - return 0; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return (*intop->decode) (val); } int -xtensa_operand_undo_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, - uint32 *valp, uint32 pc) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_operand_internal *intop; - - intop = get_operand (intisa, opc, opnd); - if (!intop) return -1; - - if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) - return 0; - - if (!intop->undo_reloc) - { - xtisa_errno = xtensa_isa_internal_error; - strcpy (xtisa_error_msg, "operand missing undo_reloc function"); - return -1; - } - - if ((*intop->undo_reloc) (valp, pc)) - { - xtisa_errno = xtensa_isa_bad_value; - sprintf (xtisa_error_msg, - "undo_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc); - return -1; - } - - return 0; -} - - - -/* State Operands. */ - - -#define CHECK_STATE_OPERAND(INTISA,OPC,ICLASS,STOP,ERRVAL) \ - do { \ - if ((STOP) < 0 || (STOP) >= (ICLASS)->num_stateOperands) \ - { \ - xtisa_errno = xtensa_isa_bad_operand; \ - sprintf (xtisa_error_msg, "invalid state operand number (%d); " \ - "opcode \"%s\" has %d state operands", (STOP), \ - (INTISA)->opcodes[(OPC)].name, (ICLASS)->num_stateOperands); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_state -xtensa_stateOperand_state (xtensa_isa isa, xtensa_opcode opc, int stOp) +xtensa_operand_isPCRelative (xtensa_operand opnd) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass; - int iclass_id; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_STATE_OPERAND (intisa, opc, iclass, stOp, XTENSA_UNDEFINED); - return iclass->stateOperands[stOp].u.state; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + return intop->isPCRelative; } -char -xtensa_stateOperand_inout (xtensa_isa isa, xtensa_opcode opc, int stOp) +uint32 +xtensa_operand_do_reloc (xtensa_operand opnd, uint32 addr, uint32 pc) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass; - int iclass_id; - - CHECK_OPCODE (intisa, opc, 0); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_STATE_OPERAND (intisa, opc, iclass, stOp, 0); - return iclass->stateOperands[stOp].inout; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + if (!intop->isPCRelative) + return addr; + return (*intop->do_reloc) (addr, pc); } - -/* Interface Operands. */ - -#define CHECK_INTERFACE_OPERAND(INTISA,OPC,ICLASS,IFOP,ERRVAL) \ - do { \ - if ((IFOP) < 0 || (IFOP) >= (ICLASS)->num_interfaceOperands) \ - { \ - xtisa_errno = xtensa_isa_bad_operand; \ - sprintf (xtisa_error_msg, "invalid interface operand number (%d); " \ - "opcode \"%s\" has %d interface operands", (IFOP), \ - (INTISA)->opcodes[(OPC)].name, \ - (ICLASS)->num_interfaceOperands); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_interface -xtensa_interfaceOperand_interface (xtensa_isa isa, xtensa_opcode opc, - int ifOp) +uint32 +xtensa_operand_undo_reloc (xtensa_operand opnd, uint32 offset, uint32 pc) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass; - int iclass_id; - - CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); - iclass_id = intisa->opcodes[opc].iclass_id; - iclass = &intisa->iclasses[iclass_id]; - CHECK_INTERFACE_OPERAND (intisa, opc, iclass, ifOp, XTENSA_UNDEFINED); - return iclass->interfaceOperands[ifOp]; + xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; + if (!intop->isPCRelative) + return offset; + return (*intop->undo_reloc) (offset, pc); } - -/* Register Files. */ - - -#define CHECK_REGFILE(INTISA,RF,ERRVAL) \ - do { \ - if ((RF) < 0 || (RF) >= (INTISA)->num_regfiles) \ - { \ - xtisa_errno = xtensa_isa_bad_regfile; \ - strcpy (xtisa_error_msg, "invalid regfile specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_regfile -xtensa_regfile_lookup (xtensa_isa isa, const char *name) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int n; - - if (!name || !*name) - { - xtisa_errno = xtensa_isa_bad_regfile; - strcpy (xtisa_error_msg, "invalid regfile name"); - return XTENSA_UNDEFINED; - } - - /* The expected number of regfiles is small; use a linear search. */ - for (n = 0; n < intisa->num_regfiles; n++) - { - if (!strcmp (intisa->regfiles[n].name, name)) - return n; - } - - xtisa_errno = xtensa_isa_bad_regfile; - sprintf (xtisa_error_msg, "regfile \"%s\" not recognized", name); - return XTENSA_UNDEFINED; -} - - -xtensa_regfile -xtensa_regfile_lookup_shortname (xtensa_isa isa, const char *shortname) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int n; - - if (!shortname || !*shortname) - { - xtisa_errno = xtensa_isa_bad_regfile; - strcpy (xtisa_error_msg, "invalid regfile shortname"); - return XTENSA_UNDEFINED; - } - - /* The expected number of regfiles is small; use a linear search. */ - for (n = 0; n < intisa->num_regfiles; n++) - { - /* Ignore regfile views since they always have the same shortnames - as their parents. */ - if (intisa->regfiles[n].parent != n) - continue; - if (!strcmp (intisa->regfiles[n].shortname, shortname)) - return n; - } - - xtisa_errno = xtensa_isa_bad_regfile; - sprintf (xtisa_error_msg, "regfile shortname \"%s\" not recognized", - shortname); - return XTENSA_UNDEFINED; -} - +/* Instruction buffers. */ -const char * -xtensa_regfile_name (xtensa_isa isa, xtensa_regfile rf) +xtensa_insnbuf +xtensa_insnbuf_alloc (xtensa_isa isa) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_REGFILE (intisa, rf, NULL); - return intisa->regfiles[rf].name; + return (xtensa_insnbuf) malloc (xtensa_insnbuf_size (isa) * + sizeof (xtensa_insnbuf_word)); } -const char * -xtensa_regfile_shortname (xtensa_isa isa, xtensa_regfile rf) +void +xtensa_insnbuf_free (xtensa_insnbuf buf) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_REGFILE (intisa, rf, NULL); - return intisa->regfiles[rf].shortname; + free( buf ); } -xtensa_regfile -xtensa_regfile_view_parent (xtensa_isa isa, xtensa_regfile rf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED); - return intisa->regfiles[rf].parent; -} - +/* Given <byte_index>, the index of a byte in a xtensa_insnbuf, our + internal representation of a xtensa instruction word, return the index of + its word and the bit index of its low order byte in the xtensa_insnbuf. */ -int -xtensa_regfile_num_bits (xtensa_isa isa, xtensa_regfile rf) +static inline int +byte_to_word_index (int byte_index) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED); - return intisa->regfiles[rf].num_bits; + return byte_index / sizeof (xtensa_insnbuf_word); } -int -xtensa_regfile_num_entries (xtensa_isa isa, xtensa_regfile rf) +static inline int +byte_to_bit_index (int byte_index) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED); - return intisa->regfiles[rf].num_entries; + return (byte_index & 0x3) * 8; } - -/* Processor States. */ +/* Copy an instruction in the 32 bit words pointed at by <insn> to characters + pointed at by <cp>. This is more complicated than you might think because + we want 16 bit instructions in bytes 2,3 for big endian. This function + allows us to specify which byte in <insn> to start with and which way to + increment, allowing trivial implementation for both big and little endian. + And it seems to make pretty good code for both. */ -#define CHECK_STATE(INTISA,ST,ERRVAL) \ - do { \ - if ((ST) < 0 || (ST) >= (INTISA)->num_states) \ - { \ - xtisa_errno = xtensa_isa_bad_state; \ - strcpy (xtisa_error_msg, "invalid state specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_state -xtensa_state_lookup (xtensa_isa isa, const char *name) +void +xtensa_insnbuf_to_chars (xtensa_isa isa, const xtensa_insnbuf insn, char *cp) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_lookup_entry entry, *result; - - if (!name || !*name) - { - xtisa_errno = xtensa_isa_bad_state; - strcpy (xtisa_error_msg, "invalid state name"); - return XTENSA_UNDEFINED; - } - - entry.key = name; - result = bsearch (&entry, intisa->state_lookup_table, intisa->num_states, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + int insn_size = xtensa_insn_maxlength (intisa); + int fence_post, start, increment, i, byte_count; + xtensa_opcode opc; - if (!result) + if (intisa->is_big_endian) { - xtisa_errno = xtensa_isa_bad_state; - sprintf (xtisa_error_msg, "state \"%s\" not recognized", name); - return XTENSA_UNDEFINED; + start = insn_size - 1; + increment = -1; } - - return result->u.state; -} - - -const char * -xtensa_state_name (xtensa_isa isa, xtensa_state st) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_STATE (intisa, st, NULL); - return intisa->states[st].name; -} - - -int -xtensa_state_num_bits (xtensa_isa isa, xtensa_state st) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_STATE (intisa, st, XTENSA_UNDEFINED); - return intisa->states[st].num_bits; -} - - -int -xtensa_state_is_exported (xtensa_isa isa, xtensa_state st) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_STATE (intisa, st, XTENSA_UNDEFINED); - if ((intisa->states[st].flags & XTENSA_STATE_IS_EXPORTED) != 0) - return 1; - return 0; -} - - -/* Sysregs. */ - - -#define CHECK_SYSREG(INTISA,SYSREG,ERRVAL) \ - do { \ - if ((SYSREG) < 0 || (SYSREG) >= (INTISA)->num_sysregs) \ - { \ - xtisa_errno = xtensa_isa_bad_sysreg; \ - strcpy (xtisa_error_msg, "invalid sysreg specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_sysreg -xtensa_sysreg_lookup (xtensa_isa isa, int num, int is_user) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - - if (is_user != 0) - is_user = 1; - - if (num < 0 || num > intisa->max_sysreg_num[is_user] - || intisa->sysreg_table[is_user][num] == XTENSA_UNDEFINED) + else { - xtisa_errno = xtensa_isa_bad_sysreg; - strcpy (xtisa_error_msg, "sysreg not recognized"); - return XTENSA_UNDEFINED; + start = 0; + increment = 1; } - return intisa->sysreg_table[is_user][num]; -} - + /* Find the opcode; do nothing if the buffer does not contain a valid + instruction since we need to know how many bytes to copy. */ + opc = xtensa_decode_insn (isa, insn); + if (opc == XTENSA_UNDEFINED) + return; -xtensa_sysreg -xtensa_sysreg_lookup_name (xtensa_isa isa, const char *name) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_lookup_entry entry, *result; + byte_count = xtensa_insn_length (isa, opc); + fence_post = start + (byte_count * increment); - if (!name || !*name) + for (i = start; i != fence_post; i += increment, ++cp) { - xtisa_errno = xtensa_isa_bad_sysreg; - strcpy (xtisa_error_msg, "invalid sysreg name"); - return XTENSA_UNDEFINED; - } - - entry.key = name; - result = bsearch (&entry, intisa->sysreg_lookup_table, intisa->num_sysregs, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + int word_inx = byte_to_word_index (i); + int bit_inx = byte_to_bit_index (i); - if (!result) - { - xtisa_errno = xtensa_isa_bad_sysreg; - sprintf (xtisa_error_msg, "sysreg \"%s\" not recognized", name); - return XTENSA_UNDEFINED; + *cp = (insn[word_inx] >> bit_inx) & 0xff; } - - return result->u.sysreg; } - -const char * -xtensa_sysreg_name (xtensa_isa isa, xtensa_sysreg sysreg) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_SYSREG (intisa, sysreg, NULL); - return intisa->sysregs[sysreg].name; -} - - -int -xtensa_sysreg_number (xtensa_isa isa, xtensa_sysreg sysreg) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_SYSREG (intisa, sysreg, XTENSA_UNDEFINED); - return intisa->sysregs[sysreg].number; -} - - -int -xtensa_sysreg_is_user (xtensa_isa isa, xtensa_sysreg sysreg) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_SYSREG (intisa, sysreg, XTENSA_UNDEFINED); - if (intisa->sysregs[sysreg].is_user) - return 1; - return 0; -} - - -/* Interfaces. */ - - -#define CHECK_INTERFACE(INTISA,INTF,ERRVAL) \ - do { \ - if ((INTF) < 0 || (INTF) >= (INTISA)->num_interfaces) \ - { \ - xtisa_errno = xtensa_isa_bad_interface; \ - strcpy (xtisa_error_msg, "invalid interface specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_interface -xtensa_interface_lookup (xtensa_isa isa, const char *ifname) +/* Inward conversion from byte stream to xtensa_insnbuf. See + xtensa_insnbuf_to_chars for a discussion of why this is + complicated by endianness. */ + +void +xtensa_insnbuf_from_chars (xtensa_isa isa, xtensa_insnbuf insn, const char* cp) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_lookup_entry entry, *result; + int insn_size = xtensa_insn_maxlength (intisa); + int fence_post, start, increment, i; - if (!ifname || !*ifname) + if (intisa->is_big_endian) { - xtisa_errno = xtensa_isa_bad_interface; - strcpy (xtisa_error_msg, "invalid interface name"); - return XTENSA_UNDEFINED; + start = insn_size - 1; + increment = -1; } - - entry.key = ifname; - result = bsearch (&entry, intisa->interface_lookup_table, - intisa->num_interfaces, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); - - if (!result) + else { - xtisa_errno = xtensa_isa_bad_interface; - sprintf (xtisa_error_msg, "interface \"%s\" not recognized", ifname); - return XTENSA_UNDEFINED; + start = 0; + increment = 1; } - return result->u.intf; -} - - -const char * -xtensa_interface_name (xtensa_isa isa, xtensa_interface intf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_INTERFACE (intisa, intf, NULL); - return intisa->interfaces[intf].name; -} - - -int -xtensa_interface_num_bits (xtensa_isa isa, xtensa_interface intf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_INTERFACE (intisa, intf, XTENSA_UNDEFINED); - return intisa->interfaces[intf].num_bits; -} - - -char -xtensa_interface_inout (xtensa_isa isa, xtensa_interface intf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_INTERFACE (intisa, intf, 0); - return intisa->interfaces[intf].inout; -} - - -int -xtensa_interface_has_side_effect (xtensa_isa isa, xtensa_interface intf) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_INTERFACE (intisa, intf, XTENSA_UNDEFINED); - if ((intisa->interfaces[intf].flags & XTENSA_INTERFACE_HAS_SIDE_EFFECT) != 0) - return 1; - return 0; -} - - -/* Functional Units. */ - - -#define CHECK_FUNCUNIT(INTISA,FUN,ERRVAL) \ - do { \ - if ((FUN) < 0 || (FUN) >= (INTISA)->num_funcUnits) \ - { \ - xtisa_errno = xtensa_isa_bad_funcUnit; \ - strcpy (xtisa_error_msg, "invalid functional unit specifier"); \ - return (ERRVAL); \ - } \ - } while (0) - - -xtensa_funcUnit -xtensa_funcUnit_lookup (xtensa_isa isa, const char *fname) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_lookup_entry entry, *result; + fence_post = start + (insn_size * increment); + memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word)); - if (!fname || !*fname) + for ( i = start; i != fence_post; i += increment, ++cp ) { - xtisa_errno = xtensa_isa_bad_funcUnit; - strcpy (xtisa_error_msg, "invalid functional unit name"); - return XTENSA_UNDEFINED; - } - - entry.key = fname; - result = bsearch (&entry, intisa->funcUnit_lookup_table, - intisa->num_funcUnits, - sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + int word_inx = byte_to_word_index (i); + int bit_inx = byte_to_bit_index (i); - if (!result) - { - xtisa_errno = xtensa_isa_bad_funcUnit; - sprintf (xtisa_error_msg, - "functional unit \"%s\" not recognized", fname); - return XTENSA_UNDEFINED; + insn[word_inx] |= (*cp & 0xff) << bit_inx; } - - return result->u.fun; -} - - -const char * -xtensa_funcUnit_name (xtensa_isa isa, xtensa_funcUnit fun) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FUNCUNIT (intisa, fun, NULL); - return intisa->funcUnits[fun].name; -} - - -int -xtensa_funcUnit_num_copies (xtensa_isa isa, xtensa_funcUnit fun) -{ - xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - CHECK_FUNCUNIT (intisa, fun, XTENSA_UNDEFINED); - return intisa->funcUnits[fun].num_copies; } |