diff options
Diffstat (limited to 'bfd/xtensa-isa.c')
| -rw-r--r-- | bfd/xtensa-isa.c | 1820 |
1 files changed, 1484 insertions, 336 deletions
diff --git a/bfd/xtensa-isa.c b/bfd/xtensa-isa.c index 761e5c6..30ad80c 100644 --- a/bfd/xtensa-isa.c +++ b/bfd/xtensa-isa.c @@ -1,5 +1,5 @@ /* Configurable Xtensa ISA support. - Copyright 2003 Free Software Foundation, Inc. + Copyright 2003, 2004 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -17,342 +17,709 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <string.h> - +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" #include "xtensa-isa.h" #include "xtensa-isa-internal.h" -xtensa_isa xtensa_default_isa = NULL; +xtensa_isa_status xtisa_errno; +char xtisa_error_msg[1024]; + -static int -opname_lookup_compare (const void *v1, const void *v2) +xtensa_isa_status +xtensa_isa_errno (xtensa_isa isa __attribute__ ((unused))) { - opname_lookup_entry *e1 = (opname_lookup_entry *)v1; - opname_lookup_entry *e2 = (opname_lookup_entry *)v2; + return xtisa_errno; +} - return strcmp (e1->key, e2->key); + +char * +xtensa_isa_error_msg (xtensa_isa isa __attribute__ ((unused))) +{ + return xtisa_error_msg; } -xtensa_isa -xtensa_isa_init (void) +#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); +} + + +static inline int +byte_to_bit_index (int byte_index) +{ + 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 isa; - int mod; + 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; + + if (num_chars == 0) + num_chars = insn_size; - isa = xtensa_load_isa (0); - if (isa == 0) + if (intisa->is_big_endian) { - fprintf (stderr, "Failed to initialize Xtensa base ISA module\n"); - return NULL; + start = insn_size - 1; + increment = -1; + } + else + { + start = 0; + increment = 1; } - for (mod = 1; xtensa_isa_modules[mod].get_num_opcodes_fn; mod++) + /* 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) { - if (!xtensa_extend_isa (isa, mod)) - { - fprintf (stderr, "Failed to initialize Xtensa TIE ISA module\n"); - return NULL; - } + xtisa_errno = xtensa_isa_buffer_overflow; + strcpy (xtisa_error_msg, "output buffer too small for instruction"); + return XTENSA_UNDEFINED; } - return isa; + 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; } -/* ISA information. */ -static int -xtensa_check_isa_config (xtensa_isa_internal *isa, - struct config_struct *config_table) +/* 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) { - int i, j; + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + int max_size, insn_size, fence_post, start, increment, i; + + 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) + { + /* This should never happen when the byte stream contains a + valid instruction. Just read the maximum number of bytes.... */ + insn_size = max_size; + } + + if (num_chars == 0 || num_chars > insn_size) + num_chars = insn_size; - if (!config_table) + if (intisa->is_big_endian) + { + start = max_size - 1; + increment = -1; + } + else { - fprintf (stderr, "Error: Empty configuration table in ISA DLL\n"); - return 0; + start = 0; + increment = 1; } - /* For the first module, save a pointer to the table and record the - specified endianness and availability of the density option. */ + fence_post = start + (num_chars * increment); + memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word)); - if (isa->num_modules == 0) + for (i = start; i != fence_post; i += increment, ++cp) { - int found_memory_order = 0; + int word_inx = byte_to_word_index (i); + int bit_inx = byte_to_bit_index (i); + + insn[word_inx] |= (*cp & 0xff) << bit_inx; + } +} - isa->config = config_table; - isa->has_density = 1; /* Default to have density option. */ - for (i = 0; config_table[i].param_name; i++) - { - 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; - } + +/* ISA information. */ - return 1; +extern xtensa_isa_internal xtensa_modules; + +xtensa_isa +xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p) +{ + 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); - /* 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. */ + /* 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++) + { + isa->state_lookup_table[n].key = isa->states[n].name; + isa->state_lookup_table[n].u.state = n; + } + 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); - for (i = 0; config_table[i].param_name; i++) + /* Set up the user & system sysreg number tables. */ + for (is_user = 0; is_user < 2; is_user++) { - for (j = 0; isa->config[j].param_name; j++) - { - 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; - } - } + 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); - return 1; + isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) / + sizeof (xtensa_insnbuf_word)); + + return (xtensa_isa) isa; } -static int -xtensa_add_isa (xtensa_isa_internal *isa, libisa_module_specifier libisa) +void +xtensa_isa_free (xtensa_isa isa) { - 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; + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + int n; - 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; + /* 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 (!get_num_opcodes_fn || !get_opcodes_fn || !decode_insn_fn - || (!get_config_table_fn && isa->num_modules == 0)) - return 0; - - if (get_config_table_fn - && !xtensa_check_isa_config (isa, get_config_table_fn ())) - return 0; + if (intisa->opname_lookup_table) + { + free (intisa->opname_lookup_table); + intisa->opname_lookup_table = 0; + } - prev_num_opcodes = isa->num_opcodes; - new_num_opcodes = (*get_num_opcodes_fn) (); + if (intisa->state_lookup_table) + { + free (intisa->state_lookup_table); + intisa->state_lookup_table = 0; + } - 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)); + 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]) + { + free (intisa->sysreg_table[n]); + intisa->sysreg_table[n] = 0; + } + } - opcodes = (*get_opcodes_fn) (); + if (intisa->interface_lookup_table) + { + free (intisa->interface_lookup_table); + intisa->interface_lookup_table = 0; + } - insn_size = isa->insn_size; - for (opc = 0; opc < new_num_opcodes; opc++) + if (intisa->funcUnit_lookup_table) { - 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; + free (intisa->funcUnit_lookup_table); + intisa->funcUnit_lookup_table = 0; } +} - isa->insn_size = insn_size; - isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) / - sizeof (xtensa_insnbuf_word)); - qsort (isa->opname_lookup_table, isa->num_opcodes, - sizeof (opname_lookup_entry), opname_lookup_compare); +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); +} + + +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; - /* Check for duplicate opcode names. */ - for (opc = 1; opc < isa->num_opcodes; opc++) + num_opcodes = xtensa_isa_num_opcodes (isa); + for (opcode = 0; opcode < num_opcodes; opcode++) { - if (!opname_lookup_compare (&isa->opname_lookup_table[opc-1], - &isa->opname_lookup_table[opc])) + num_uses = xtensa_opcode_num_funcUnit_uses (isa, opcode); + for (i = 0; i < num_uses; i++) { - fprintf (stderr, "Error: Duplicate TIE opcode \"%s\"\n", - isa->opname_lookup_table[opc].key); - return 0; + use = xtensa_opcode_funcUnit_use (isa, opcode, i); + stage = use->stage; + if (stage > max_stage) + max_stage = stage; } } - this_module = isa->num_modules; - isa->num_modules += 1; + return max_stage + 1; +} + + +int +xtensa_isa_num_formats (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_formats; +} - 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)); - isa->module_opcode_base[this_module] = prev_num_opcodes; - isa->module_decode_fn[this_module] = decode_insn_fn; +int +xtensa_isa_num_opcodes (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_opcodes; +} - xtensa_default_isa = isa; - return 1; /* Library was successfully added. */ +int +xtensa_isa_num_regfiles (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_regfiles; } -xtensa_isa -xtensa_load_isa (libisa_module_specifier libisa) +int +xtensa_isa_num_states (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_states; +} + + +int +xtensa_isa_num_sysregs (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_sysregs; +} + + +int +xtensa_isa_num_interfaces (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_interfaces; +} + + +int +xtensa_isa_num_funcUnits (xtensa_isa isa) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + return intisa->num_funcUnits; +} + + + +/* Instruction formats. */ + + +#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) + + +#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) + + +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; +} + + +xtensa_format +xtensa_format_lookup (xtensa_isa isa, const char *fmtname) { - xtensa_isa_internal *isa; + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + int fmt; - isa = (xtensa_isa_internal *) malloc (sizeof (xtensa_isa_internal)); - memset (isa, 0, sizeof (xtensa_isa_internal)); - if (!xtensa_add_isa (isa, libisa)) + if (!fmtname || !*fmtname) { - xtensa_isa_free (isa); - return NULL; + xtisa_errno = xtensa_isa_bad_format; + strcpy (xtisa_error_msg, "invalid format name"); + return XTENSA_UNDEFINED; } - return (xtensa_isa) isa; + + for (fmt = 0; fmt < intisa->num_formats; fmt++) + { + if (strcasecmp (fmtname, intisa->formats[fmt].name) == 0) + return fmt; + } + + 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; } int -xtensa_extend_isa (xtensa_isa isa, libisa_module_specifier libisa) +xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return xtensa_add_isa (intisa, libisa); + CHECK_FORMAT (intisa, fmt, -1); + (*intisa->formats[fmt].encode_fn) (insn); + return 0; } -void -xtensa_isa_free (xtensa_isa isa) +int +xtensa_format_length (xtensa_isa isa, xtensa_format fmt) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - 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); + CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); + return intisa->formats[fmt].length; } int -xtensa_insn_maxlength (xtensa_isa isa) +xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->insn_size; + 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_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); } int -xtensa_insnbuf_size (xtensa_isa isa) +xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot, + const xtensa_insnbuf insn, xtensa_insnbuf slotbuf) { - xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa; - return intisa->insnbuf_size; + 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; } int -xtensa_num_opcodes (xtensa_isa isa) +xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot, + xtensa_insnbuf insn, const xtensa_insnbuf slotbuf) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->num_opcodes; + 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; } + +/* 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; - opname_lookup_entry entry, *result; + xtensa_lookup_entry entry, *result; + + if (!opname || !*opname) + { + xtisa_errno = xtensa_isa_bad_opcode; + strcpy (xtisa_error_msg, "invalid opcode name"); + return XTENSA_UNDEFINED; + } entry.key = opname; result = bsearch (&entry, intisa->opname_lookup_table, intisa->num_opcodes, - sizeof (opname_lookup_entry), opname_lookup_compare); - if (!result) return XTENSA_UNDEFINED; - return result->opcode; + 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; } xtensa_opcode -xtensa_decode_insn (xtensa_isa isa, const xtensa_insnbuf insn) +xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot, + const xtensa_insnbuf slotbuf) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - 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 slot_id; + xtensa_opcode opc; + CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED); + CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED); -/* Opcode information. */ + slot_id = intisa->formats[fmt].slot_id[slot]; -void -xtensa_encode_insn (xtensa_isa isa, xtensa_opcode opc, xtensa_insnbuf insn) + 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; - xtensa_insnbuf template = intisa->opcode_table[opc]->template(); - int len = intisa->opcode_table[opc]->length; - int n; + int slot_id; + xtensa_opcode_encode_fn encode_fn; - /* Convert length to 32-bit words. */ - len = (len + 3) / 4; + CHECK_FORMAT (intisa, fmt, -1); + CHECK_SLOT (intisa, fmt, slot, -1); + CHECK_OPCODE (intisa, opc, -1); - /* Copy the template. */ - for (n = 0; n < len; n++) - insn[n] = template[n]; - - /* Fill any unused buffer space with zeros. */ - for ( ; n < intisa->insnbuf_size; n++) - insn[n] = 0; + 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; } @@ -360,234 +727,1015 @@ const char * xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->opcode_table[opc]->name; + CHECK_OPCODE (intisa, opc, NULL); + return intisa->opcodes[opc].name; +} + + +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; +} + + +int +xtensa_opcode_is_jump (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_JUMP) != 0) + return 1; + return 0; +} + + +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; } int -xtensa_insn_length (xtensa_isa isa, xtensa_opcode opc) +xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->opcode_table[opc]->length; + CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); + if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_CALL) != 0) + return 1; + return 0; } int -xtensa_insn_length_from_first_byte (xtensa_isa isa, char first_byte) +xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int is_density = (first_byte & (intisa->is_big_endian ? 0x80 : 0x08)) != 0; - return (intisa->has_density && is_density ? 2 : 3); + int iclass_id; + + CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); + iclass_id = intisa->opcodes[opc].iclass_id; + return intisa->iclasses[iclass_id].num_operands; } int -xtensa_num_operands (xtensa_isa isa, xtensa_opcode opc) +xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - return intisa->opcode_table[opc]->iclass->num_operands; + int iclass_id; + + CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); + iclass_id = intisa->opcodes[opc].iclass_id; + return intisa->iclasses[iclass_id].num_stateOperands; } -xtensa_operand -xtensa_get_operand (xtensa_isa isa, xtensa_opcode opc, int opnd) +int +xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - xtensa_iclass_internal *iclass = intisa->opcode_table[opc]->iclass; - if (opnd >= iclass->num_operands) - return NULL; - return (xtensa_operand) iclass->operands[opnd]; + int iclass_id; + + CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED); + iclass_id = intisa->opcodes[opc].iclass_id; + return intisa->iclasses[iclass_id].num_interfaceOperands; } +int +xtensa_opcode_num_funcUnit_uses (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; +} + + +xtensa_funcUnit_use * +xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u) +{ + 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]; +} + + + /* Operand information. */ -char * -xtensa_operand_kind (xtensa_operand opnd) + +#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_operand_internal *intop = (xtensa_operand_internal *) opnd; - return intop->operand_kind; + 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) +{ + 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; } char -xtensa_operand_inout (xtensa_operand opnd) +xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - return intop->inout; + 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; } -uint32 -xtensa_operand_get_field (xtensa_operand opnd, const xtensa_insnbuf insn) +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_operand_internal *intop = (xtensa_operand_internal *) opnd; - return (*intop->get_field) (insn); + 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; } -void -xtensa_operand_set_field (xtensa_operand opnd, xtensa_insnbuf insn, uint32 val) +int +xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd, + xtensa_format fmt, int slot, + xtensa_insnbuf slotbuf, uint32 val) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - return (*intop->set_field) (insn, 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; } -xtensa_encode_result -xtensa_operand_encode (xtensa_operand opnd, uint32 *valp) +int +xtensa_operand_encode (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - return (*intop->encode) (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; } -uint32 -xtensa_operand_decode (xtensa_operand opnd, uint32 val) +int +xtensa_operand_decode (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - return (*intop->decode) (val); + 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_isPCRelative (xtensa_operand opnd) +xtensa_operand_is_register (xtensa_isa isa, xtensa_opcode opc, int opnd) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - return intop->isPCRelative; + 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; } -uint32 -xtensa_operand_do_reloc (xtensa_operand opnd, uint32 addr, uint32 pc) +xtensa_regfile +xtensa_operand_regfile (xtensa_isa isa, xtensa_opcode opc, int opnd) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - if (!intop->isPCRelative) - return addr; - return (*intop->do_reloc) (addr, pc); + 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; } -uint32 -xtensa_operand_undo_reloc (xtensa_operand opnd, uint32 offset, uint32 pc) +int +xtensa_operand_num_regs (xtensa_isa isa, xtensa_opcode opc, int opnd) { - xtensa_operand_internal *intop = (xtensa_operand_internal *) opnd; - if (!intop->isPCRelative) - return offset; - return (*intop->undo_reloc) (offset, pc); + 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; } -/* Instruction buffers. */ +int +xtensa_operand_is_known_reg (xtensa_isa isa, xtensa_opcode opc, int opnd) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + xtensa_operand_internal *intop; -xtensa_insnbuf -xtensa_insnbuf_alloc (xtensa_isa isa) + intop = get_operand (intisa, opc, opnd); + if (!intop) return XTENSA_UNDEFINED; + + if ((intop->flags & XTENSA_OPERAND_IS_UNKNOWN) == 0) + return 1; + return 0; +} + + +int +xtensa_operand_is_PCrelative (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_PCRELATIVE) != 0) + return 1; + return 0; +} + + +int +xtensa_operand_do_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp, uint32 pc) { - return (xtensa_insnbuf) malloc (xtensa_insnbuf_size (isa) * - sizeof (xtensa_insnbuf_word)); + 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; } -void -xtensa_insnbuf_free (xtensa_insnbuf buf) +int +xtensa_operand_undo_reloc (xtensa_isa isa, xtensa_opcode opc, int opnd, + uint32 *valp, uint32 pc) { - free( buf ); + 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; } -/* 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. */ + +/* State Operands. */ -static inline int -byte_to_word_index (int byte_index) + +#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) { - return byte_index / sizeof (xtensa_insnbuf_word); + 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; } -static inline int -byte_to_bit_index (int byte_index) +char +xtensa_stateOperand_inout (xtensa_isa isa, xtensa_opcode opc, int stOp) { - return (byte_index & 0x3) * 8; + 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; } + +/* Interface Operands. */ -/* 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. */ -void -xtensa_insnbuf_to_chars (xtensa_isa isa, const xtensa_insnbuf insn, char *cp) +#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) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int insn_size = xtensa_insn_maxlength (intisa); - int fence_post, start, increment, i, byte_count; - xtensa_opcode opc; + 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]; +} - if (intisa->is_big_endian) + + +/* 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) { - start = insn_size - 1; - increment = -1; + xtisa_errno = xtensa_isa_bad_regfile; + strcpy (xtisa_error_msg, "invalid regfile name"); + return XTENSA_UNDEFINED; } - else + + /* The expected number of regfiles is small; use a linear search. */ + for (n = 0; n < intisa->num_regfiles; n++) { - start = 0; - increment = 1; + if (!strcmp (intisa->regfiles[n].name, name)) + return n; } - /* 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; + xtisa_errno = xtensa_isa_bad_regfile; + sprintf (xtisa_error_msg, "regfile \"%s\" not recognized", name); + return XTENSA_UNDEFINED; +} - byte_count = xtensa_insn_length (isa, opc); - fence_post = start + (byte_count * increment); - for (i = start; i != fence_post; i += increment, ++cp) +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) { - int word_inx = byte_to_word_index (i); - int bit_inx = byte_to_bit_index (i); + xtisa_errno = xtensa_isa_bad_regfile; + strcpy (xtisa_error_msg, "invalid regfile shortname"); + return XTENSA_UNDEFINED; + } - *cp = (insn[word_inx] >> bit_inx) & 0xff; + /* 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; } -/* 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) + +const char * +xtensa_regfile_name (xtensa_isa isa, xtensa_regfile rf) { xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; - int insn_size = xtensa_insn_maxlength (intisa); - int fence_post, start, increment, i; + CHECK_REGFILE (intisa, rf, NULL); + return intisa->regfiles[rf].name; +} - if (intisa->is_big_endian) + +const char * +xtensa_regfile_shortname (xtensa_isa isa, xtensa_regfile rf) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + CHECK_REGFILE (intisa, rf, NULL); + return intisa->regfiles[rf].shortname; +} + + +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; +} + + +int +xtensa_regfile_num_bits (xtensa_isa isa, xtensa_regfile rf) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED); + return intisa->regfiles[rf].num_bits; +} + + +int +xtensa_regfile_num_entries (xtensa_isa isa, xtensa_regfile rf) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + CHECK_REGFILE (intisa, rf, XTENSA_UNDEFINED); + return intisa->regfiles[rf].num_entries; +} + + +/* Processor States. */ + + +#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) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + xtensa_lookup_entry entry, *result; + + if (!name || !*name) { - start = insn_size - 1; - increment = -1; + xtisa_errno = xtensa_isa_bad_state; + strcpy (xtisa_error_msg, "invalid state name"); + return XTENSA_UNDEFINED; } - else + + entry.key = name; + result = bsearch (&entry, intisa->state_lookup_table, intisa->num_states, + sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + + if (!result) { - start = 0; - increment = 1; + xtisa_errno = xtensa_isa_bad_state; + sprintf (xtisa_error_msg, "state \"%s\" not recognized", name); + return XTENSA_UNDEFINED; } - fence_post = start + (insn_size * increment); - memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word)); + return result->u.state; +} - for ( i = start; i != fence_post; i += increment, ++cp ) + +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) { - int word_inx = byte_to_word_index (i); - int bit_inx = byte_to_bit_index (i); + xtisa_errno = xtensa_isa_bad_sysreg; + strcpy (xtisa_error_msg, "sysreg not recognized"); + return XTENSA_UNDEFINED; + } - insn[word_inx] |= (*cp & 0xff) << bit_inx; + return intisa->sysreg_table[is_user][num]; +} + + +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; + + if (!name || !*name) + { + 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); + + if (!result) + { + xtisa_errno = xtensa_isa_bad_sysreg; + sprintf (xtisa_error_msg, "sysreg \"%s\" not recognized", name); + return XTENSA_UNDEFINED; } + + 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) +{ + xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa; + xtensa_lookup_entry entry, *result; + + if (!ifname || !*ifname) + { + xtisa_errno = xtensa_isa_bad_interface; + strcpy (xtisa_error_msg, "invalid interface name"); + return XTENSA_UNDEFINED; + } + + entry.key = ifname; + result = bsearch (&entry, intisa->interface_lookup_table, + intisa->num_interfaces, + sizeof (xtensa_lookup_entry), xtensa_isa_name_compare); + + if (!result) + { + xtisa_errno = xtensa_isa_bad_interface; + sprintf (xtisa_error_msg, "interface \"%s\" not recognized", ifname); + return XTENSA_UNDEFINED; + } + + 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; + + if (!fname || !*fname) + { + 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); + + if (!result) + { + xtisa_errno = xtensa_isa_bad_funcUnit; + sprintf (xtisa_error_msg, + "functional unit \"%s\" not recognized", fname); + return XTENSA_UNDEFINED; + } + + 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; } |