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- /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
- /* Assembler interface for targets using CGEN. -*- C -*-
- CGEN: Cpu tools GENerator
- THIS FILE IS MACHINE GENERATED WITH CGEN.
- - the resultant file is machine generated, cgen-asm.in isn't
- Copyright (C) 1996-2022 Free Software Foundation, Inc.
- This file is part of libopcodes.
- This library is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3, or (at your option)
- any later version.
- It is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
- /* ??? Eventually more and more of this stuff can go to cpu-independent files.
- Keep that in mind. */
- #include "sysdep.h"
- #include <stdio.h>
- #include "ansidecl.h"
- #include "bfd.h"
- #include "symcat.h"
- #include "or1k-desc.h"
- #include "or1k-opc.h"
- #include "opintl.h"
- #include "xregex.h"
- #include "libiberty.h"
- #include "safe-ctype.h"
- #undef min
- #define min(a,b) ((a) < (b) ? (a) : (b))
- #undef max
- #define max(a,b) ((a) > (b) ? (a) : (b))
- static const char * parse_insn_normal
- (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
- /* -- assembler routines inserted here. */
- /* -- asm.c */
- static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
- static const char * INVALID_STORE_RELOC = N_("relocation invalid for store");
- static const char * INVALID_RELOC_TYPE = N_("internal relocation type invalid");
- #define CGEN_VERBOSE_ASSEMBLER_ERRORS
- static const char *
- parse_disp26 (CGEN_CPU_DESC cd,
- const char ** strp,
- int opindex,
- int opinfo ATTRIBUTE_UNUSED,
- enum cgen_parse_operand_result * resultp,
- bfd_vma * valuep)
- {
- const char *str = *strp;
- const char *errmsg = NULL;
- bfd_reloc_code_real_type reloc = BFD_RELOC_OR1K_REL_26;
- if (strncasecmp (str, "plta(", 5) == 0)
- {
- *strp = str + 5;
- reloc = BFD_RELOC_OR1K_PLTA26;
- }
- else if (strncasecmp (str, "plt(", 4) == 0)
- {
- *strp = str + 4;
- reloc = BFD_RELOC_OR1K_PLT26;
- }
- errmsg = cgen_parse_address (cd, strp, opindex, reloc, resultp, valuep);
- if (reloc != BFD_RELOC_OR1K_REL_26)
- {
- if (**strp != ')')
- errmsg = MISSING_CLOSING_PARENTHESIS;
- else
- ++*strp;
- }
- return errmsg;
- }
- static const char *
- parse_disp21 (CGEN_CPU_DESC cd,
- const char ** strp,
- int opindex,
- int opinfo ATTRIBUTE_UNUSED,
- enum cgen_parse_operand_result * resultp,
- bfd_vma * valuep)
- {
- const char *str = *strp;
- const char *errmsg = NULL;
- bfd_reloc_code_real_type reloc = BFD_RELOC_OR1K_PCREL_PG21;
- if (strncasecmp (str, "got(", 4) == 0)
- {
- *strp = str + 4;
- reloc = BFD_RELOC_OR1K_GOT_PG21;
- }
- else if (strncasecmp (str, "tlsgd(", 6) == 0)
- {
- *strp = str + 6;
- reloc = BFD_RELOC_OR1K_TLS_GD_PG21;
- }
- else if (strncasecmp (str, "tlsldm(", 7) == 0)
- {
- *strp = str + 7;
- reloc = BFD_RELOC_OR1K_TLS_LDM_PG21;
- }
- else if (strncasecmp (str, "gottp(", 6) == 0)
- {
- *strp = str + 6;
- reloc = BFD_RELOC_OR1K_TLS_IE_PG21;
- }
- errmsg = cgen_parse_address (cd, strp, opindex, reloc, resultp, valuep);
- if (reloc != BFD_RELOC_OR1K_PCREL_PG21)
- {
- if (**strp != ')')
- errmsg = MISSING_CLOSING_PARENTHESIS;
- else
- ++*strp;
- }
- return errmsg;
- }
- enum or1k_rclass
- {
- RCLASS_DIRECT = 0,
- RCLASS_GOT = 1,
- RCLASS_GOTPC = 2,
- RCLASS_GOTOFF = 3,
- RCLASS_TLSGD = 4,
- RCLASS_TLSLDM = 5,
- RCLASS_DTPOFF = 6,
- RCLASS_GOTTPOFF = 7,
- RCLASS_TPOFF = 8,
- };
- enum or1k_rtype
- {
- RTYPE_LO = 0,
- RTYPE_SLO = 1,
- RTYPE_PO = 2,
- RTYPE_SPO = 3,
- RTYPE_HI = 4,
- RTYPE_AHI = 5,
- };
- #define RCLASS_SHIFT 3
- #define RTYPE_MASK 7
- static const bfd_reloc_code_real_type or1k_imm16_relocs[][6] = {
- { BFD_RELOC_LO16,
- BFD_RELOC_OR1K_SLO16,
- BFD_RELOC_OR1K_LO13,
- BFD_RELOC_OR1K_SLO13,
- BFD_RELOC_HI16,
- BFD_RELOC_HI16_S, },
- { BFD_RELOC_OR1K_GOT16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_GOT_LO13,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_GOT_AHI16 },
- { BFD_RELOC_OR1K_GOTPC_LO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_GOTPC_HI16,
- BFD_RELOC_UNUSED },
- { BFD_RELOC_LO16_GOTOFF,
- BFD_RELOC_OR1K_GOTOFF_SLO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_HI16_GOTOFF,
- BFD_RELOC_HI16_S_GOTOFF },
- { BFD_RELOC_OR1K_TLS_GD_LO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_GD_LO13,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_GD_HI16,
- BFD_RELOC_UNUSED },
- { BFD_RELOC_OR1K_TLS_LDM_LO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_LDM_LO13,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_LDM_HI16,
- BFD_RELOC_UNUSED },
- { BFD_RELOC_OR1K_TLS_LDO_LO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_LDO_HI16,
- BFD_RELOC_UNUSED },
- { BFD_RELOC_OR1K_TLS_IE_LO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_IE_LO13,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_IE_HI16,
- BFD_RELOC_OR1K_TLS_IE_AHI16 },
- { BFD_RELOC_OR1K_TLS_LE_LO16,
- BFD_RELOC_OR1K_TLS_LE_SLO16,
- BFD_RELOC_UNUSED,
- BFD_RELOC_UNUSED,
- BFD_RELOC_OR1K_TLS_LE_HI16,
- BFD_RELOC_OR1K_TLS_LE_AHI16 },
- };
- static int
- parse_reloc (const char **strp)
- {
- const char *str = *strp;
- enum or1k_rclass cls = RCLASS_DIRECT;
- enum or1k_rtype typ;
- if (strncasecmp (str, "got(", 4) == 0)
- {
- *strp = str + 4;
- return (RCLASS_GOT << RCLASS_SHIFT) | RTYPE_LO;
- }
- if (strncasecmp (str, "gotpo(", 6) == 0)
- {
- *strp = str + 6;
- return (RCLASS_GOT << RCLASS_SHIFT) | RTYPE_PO;
- }
- if (strncasecmp (str, "gottppo(", 8) == 0)
- {
- *strp = str + 8;
- return (RCLASS_GOTTPOFF << RCLASS_SHIFT) | RTYPE_PO;
- }
- if (strncasecmp (str, "gotpc", 5) == 0)
- {
- str += 5;
- cls = RCLASS_GOTPC;
- }
- else if (strncasecmp (str, "gotoff", 6) == 0)
- {
- str += 6;
- cls = RCLASS_GOTOFF;
- }
- else if (strncasecmp (str, "tlsgd", 5) == 0)
- {
- str += 5;
- cls = RCLASS_TLSGD;
- }
- else if (strncasecmp (str, "tlsldm", 6) == 0)
- {
- str += 6;
- cls = RCLASS_TLSLDM;
- }
- else if (strncasecmp (str, "dtpoff", 6) == 0)
- {
- str += 6;
- cls = RCLASS_DTPOFF;
- }
- else if (strncasecmp (str, "gottpoff", 8) == 0)
- {
- str += 8;
- cls = RCLASS_GOTTPOFF;
- }
- else if (strncasecmp (str, "tpoff", 5) == 0)
- {
- str += 5;
- cls = RCLASS_TPOFF;
- }
- else if (strncasecmp (str, "got", 3) == 0)
- {
- str += 3;
- cls = RCLASS_GOT;
- }
- if (strncasecmp (str, "hi(", 3) == 0)
- {
- str += 3;
- typ = RTYPE_HI;
- }
- else if (strncasecmp (str, "lo(", 3) == 0)
- {
- str += 3;
- typ = RTYPE_LO;
- }
- else if (strncasecmp (str, "ha(", 3) == 0)
- {
- str += 3;
- typ = RTYPE_AHI;
- }
- else if (strncasecmp (str, "po(", 3) == 0 && cls != RCLASS_GOTTPOFF)
- {
- str += 3;
- typ = RTYPE_PO;
- }
- else
- return -1;
- *strp = str;
- return (cls << RCLASS_SHIFT) | typ;
- }
- static const char *
- parse_imm16 (CGEN_CPU_DESC cd, const char **strp, int opindex,
- long *valuep, int splitp)
- {
- const char *errmsg;
- enum cgen_parse_operand_result result_type;
- bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED;
- enum or1k_rtype reloc_type;
- int reloc_code;
- bfd_vma ret;
- if (**strp == '#')
- ++*strp;
- reloc_code = parse_reloc (strp);
- reloc_type = reloc_code & RTYPE_MASK;
- if (reloc_code >= 0)
- {
- enum or1k_rclass reloc_class = reloc_code >> RCLASS_SHIFT;
- if (splitp)
- {
- if ((reloc_type == RTYPE_LO || reloc_type == RTYPE_PO)
- && reloc_class != RCLASS_GOT)
- /* If split we or up the type to RTYPE_SLO or RTYPE_SPO. */
- reloc_type |= 1;
- else
- return INVALID_STORE_RELOC;
- }
- reloc = or1k_imm16_relocs[reloc_class][reloc_type];
- }
- if (reloc != BFD_RELOC_UNUSED)
- {
- bfd_vma value;
- errmsg = cgen_parse_address (cd, strp, opindex, reloc,
- &result_type, &value);
- if (**strp != ')')
- errmsg = MISSING_CLOSING_PARENTHESIS;
- ++*strp;
- ret = value;
- if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
- switch (reloc_type)
- {
- case RTYPE_AHI:
- ret += 0x8000;
- /* FALLTHRU */
- case RTYPE_HI:
- ret >>= 16;
- /* FALLTHRU */
- case RTYPE_LO:
- case RTYPE_SLO:
- ret &= 0xffff;
- ret = (ret ^ 0x8000) - 0x8000;
- break;
- case RTYPE_PO:
- case RTYPE_SPO:
- ret &= 0x1fff;
- break;
- default:
- errmsg = INVALID_RELOC_TYPE;
- }
- }
- else
- {
- long value;
- errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value);
- ret = value;
- }
- if (errmsg == NULL)
- *valuep = ret;
- return errmsg;
- }
- static const char *
- parse_simm16 (CGEN_CPU_DESC cd, const char **strp, int opindex, long *valuep)
- {
- return parse_imm16(cd, strp, opindex, (long *) valuep, 0);
- }
- static const char *
- parse_simm16_split (CGEN_CPU_DESC cd, const char **strp, int opindex,
- long *valuep)
- {
- return parse_imm16(cd, strp, opindex, (long *) valuep, 1);
- }
- static const char *
- parse_uimm16 (CGEN_CPU_DESC cd, const char **strp, int opindex,
- unsigned long *valuep)
- {
- const char *errmsg = parse_imm16(cd, strp, opindex, (long *) valuep, 0);
- if (errmsg == NULL)
- *valuep &= 0xffff;
- return errmsg;
- }
- static const char *
- parse_uimm16_split (CGEN_CPU_DESC cd, const char **strp, int opindex,
- unsigned long *valuep)
- {
- const char *errmsg = parse_imm16(cd, strp, opindex, (long *) valuep, 1);
- if (errmsg == NULL)
- *valuep &= 0xffff;
- return errmsg;
- }
- /* Parse register pairs with syntax rA,rB to a flag + rA value. */
- static const char *
- parse_regpair (CGEN_CPU_DESC cd, const char **strp,
- int opindex ATTRIBUTE_UNUSED, unsigned long *valuep)
- {
- long reg1_index;
- long reg2_index;
- const char *errmsg;
- /* The first part should just be a register. */
- errmsg = cgen_parse_keyword (cd, strp, &or1k_cgen_opval_h_gpr,
- ®1_index);
- /* If that worked skip the comma separator. */
- if (errmsg == NULL)
- {
- if (**strp == ',')
- ++*strp;
- else
- errmsg = "Unexpected character, expected ','";
- }
- /* If that worked the next part is just another register. */
- if (errmsg == NULL)
- errmsg = cgen_parse_keyword (cd, strp, &or1k_cgen_opval_h_gpr,
- ®2_index);
- /* Validate the register pair is valid and create the output value. */
- if (errmsg == NULL)
- {
- int regoffset = reg2_index - reg1_index;
- if (regoffset == 1 || regoffset == 2)
- {
- unsigned short offsetmask;
- unsigned short value;
- offsetmask = ((regoffset == 2 ? 1 : 0) << 5);
- value = offsetmask | reg1_index;
- *valuep = value;
- }
- else
- errmsg = "Invalid register pair, offset not 1 or 2.";
- }
- return errmsg;
- }
- /* -- */
- const char * or1k_cgen_parse_operand
- (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
- /* Main entry point for operand parsing.
- This function is basically just a big switch statement. Earlier versions
- used tables to look up the function to use, but
- - if the table contains both assembler and disassembler functions then
- the disassembler contains much of the assembler and vice-versa,
- - there's a lot of inlining possibilities as things grow,
- - using a switch statement avoids the function call overhead.
- This function could be moved into `parse_insn_normal', but keeping it
- separate makes clear the interface between `parse_insn_normal' and each of
- the handlers. */
- const char *
- or1k_cgen_parse_operand (CGEN_CPU_DESC cd,
- int opindex,
- const char ** strp,
- CGEN_FIELDS * fields)
- {
- const char * errmsg = NULL;
- /* Used by scalar operands that still need to be parsed. */
- long junk ATTRIBUTE_UNUSED;
- switch (opindex)
- {
- case OR1K_OPERAND_DISP21 :
- {
- bfd_vma value = 0;
- errmsg = parse_disp21 (cd, strp, OR1K_OPERAND_DISP21, 0, NULL, & value);
- fields->f_disp21 = value;
- }
- break;
- case OR1K_OPERAND_DISP26 :
- {
- bfd_vma value = 0;
- errmsg = parse_disp26 (cd, strp, OR1K_OPERAND_DISP26, 0, NULL, & value);
- fields->f_disp26 = value;
- }
- break;
- case OR1K_OPERAND_RA :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_gpr, & fields->f_r2);
- break;
- case OR1K_OPERAND_RAD32F :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RAD32F, (unsigned long *) (& fields->f_rad32));
- break;
- case OR1K_OPERAND_RADI :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RADI, (unsigned long *) (& fields->f_rad32));
- break;
- case OR1K_OPERAND_RASF :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_fsr, & fields->f_r2);
- break;
- case OR1K_OPERAND_RB :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_gpr, & fields->f_r3);
- break;
- case OR1K_OPERAND_RBD32F :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RBD32F, (unsigned long *) (& fields->f_rbd32));
- break;
- case OR1K_OPERAND_RBDI :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RBDI, (unsigned long *) (& fields->f_rbd32));
- break;
- case OR1K_OPERAND_RBSF :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_fsr, & fields->f_r3);
- break;
- case OR1K_OPERAND_RD :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_gpr, & fields->f_r1);
- break;
- case OR1K_OPERAND_RDD32F :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RDD32F, (unsigned long *) (& fields->f_rdd32));
- break;
- case OR1K_OPERAND_RDDI :
- errmsg = parse_regpair (cd, strp, OR1K_OPERAND_RDDI, (unsigned long *) (& fields->f_rdd32));
- break;
- case OR1K_OPERAND_RDSF :
- errmsg = cgen_parse_keyword (cd, strp, & or1k_cgen_opval_h_fsr, & fields->f_r1);
- break;
- case OR1K_OPERAND_SIMM16 :
- errmsg = parse_simm16 (cd, strp, OR1K_OPERAND_SIMM16, (long *) (& fields->f_simm16));
- break;
- case OR1K_OPERAND_SIMM16_SPLIT :
- errmsg = parse_simm16_split (cd, strp, OR1K_OPERAND_SIMM16_SPLIT, (long *) (& fields->f_simm16_split));
- break;
- case OR1K_OPERAND_UIMM16 :
- errmsg = parse_uimm16 (cd, strp, OR1K_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16));
- break;
- case OR1K_OPERAND_UIMM16_SPLIT :
- errmsg = parse_uimm16_split (cd, strp, OR1K_OPERAND_UIMM16_SPLIT, (unsigned long *) (& fields->f_uimm16_split));
- break;
- case OR1K_OPERAND_UIMM6 :
- errmsg = cgen_parse_unsigned_integer (cd, strp, OR1K_OPERAND_UIMM6, (unsigned long *) (& fields->f_uimm6));
- break;
- default :
- /* xgettext:c-format */
- opcodes_error_handler
- (_("internal error: unrecognized field %d while parsing"),
- opindex);
- abort ();
- }
- return errmsg;
- }
- cgen_parse_fn * const or1k_cgen_parse_handlers[] =
- {
- parse_insn_normal,
- };
- void
- or1k_cgen_init_asm (CGEN_CPU_DESC cd)
- {
- or1k_cgen_init_opcode_table (cd);
- or1k_cgen_init_ibld_table (cd);
- cd->parse_handlers = & or1k_cgen_parse_handlers[0];
- cd->parse_operand = or1k_cgen_parse_operand;
- #ifdef CGEN_ASM_INIT_HOOK
- CGEN_ASM_INIT_HOOK
- #endif
- }
- /* Regex construction routine.
- This translates an opcode syntax string into a regex string,
- by replacing any non-character syntax element (such as an
- opcode) with the pattern '.*'
- It then compiles the regex and stores it in the opcode, for
- later use by or1k_cgen_assemble_insn
- Returns NULL for success, an error message for failure. */
- char *
- or1k_cgen_build_insn_regex (CGEN_INSN *insn)
- {
- CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
- const char *mnem = CGEN_INSN_MNEMONIC (insn);
- char rxbuf[CGEN_MAX_RX_ELEMENTS];
- char *rx = rxbuf;
- const CGEN_SYNTAX_CHAR_TYPE *syn;
- int reg_err;
- syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
- /* Mnemonics come first in the syntax string. */
- if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
- return _("missing mnemonic in syntax string");
- ++syn;
- /* Generate a case sensitive regular expression that emulates case
- insensitive matching in the "C" locale. We cannot generate a case
- insensitive regular expression because in Turkish locales, 'i' and 'I'
- are not equal modulo case conversion. */
- /* Copy the literal mnemonic out of the insn. */
- for (; *mnem; mnem++)
- {
- char c = *mnem;
- if (ISALPHA (c))
- {
- *rx++ = '[';
- *rx++ = TOLOWER (c);
- *rx++ = TOUPPER (c);
- *rx++ = ']';
- }
- else
- *rx++ = c;
- }
- /* Copy any remaining literals from the syntax string into the rx. */
- for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
- {
- if (CGEN_SYNTAX_CHAR_P (* syn))
- {
- char c = CGEN_SYNTAX_CHAR (* syn);
- switch (c)
- {
- /* Escape any regex metacharacters in the syntax. */
- case '.': case '[': case '\\':
- case '*': case '^': case '$':
- #ifdef CGEN_ESCAPE_EXTENDED_REGEX
- case '?': case '{': case '}':
- case '(': case ')': case '*':
- case '|': case '+': case ']':
- #endif
- *rx++ = '\\';
- *rx++ = c;
- break;
- default:
- if (ISALPHA (c))
- {
- *rx++ = '[';
- *rx++ = TOLOWER (c);
- *rx++ = TOUPPER (c);
- *rx++ = ']';
- }
- else
- *rx++ = c;
- break;
- }
- }
- else
- {
- /* Replace non-syntax fields with globs. */
- *rx++ = '.';
- *rx++ = '*';
- }
- }
- /* Trailing whitespace ok. */
- * rx++ = '[';
- * rx++ = ' ';
- * rx++ = '\t';
- * rx++ = ']';
- * rx++ = '*';
- /* But anchor it after that. */
- * rx++ = '$';
- * rx = '\0';
- CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
- reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
- if (reg_err == 0)
- return NULL;
- else
- {
- static char msg[80];
- regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
- regfree ((regex_t *) CGEN_INSN_RX (insn));
- free (CGEN_INSN_RX (insn));
- (CGEN_INSN_RX (insn)) = NULL;
- return msg;
- }
- }
- /* Default insn parser.
- The syntax string is scanned and operands are parsed and stored in FIELDS.
- Relocs are queued as we go via other callbacks.
- ??? Note that this is currently an all-or-nothing parser. If we fail to
- parse the instruction, we return 0 and the caller will start over from
- the beginning. Backtracking will be necessary in parsing subexpressions,
- but that can be handled there. Not handling backtracking here may get
- expensive in the case of the m68k. Deal with later.
- Returns NULL for success, an error message for failure. */
- static const char *
- parse_insn_normal (CGEN_CPU_DESC cd,
- const CGEN_INSN *insn,
- const char **strp,
- CGEN_FIELDS *fields)
- {
- /* ??? Runtime added insns not handled yet. */
- const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
- const char *str = *strp;
- const char *errmsg;
- const char *p;
- const CGEN_SYNTAX_CHAR_TYPE * syn;
- #ifdef CGEN_MNEMONIC_OPERANDS
- /* FIXME: wip */
- int past_opcode_p;
- #endif
- /* For now we assume the mnemonic is first (there are no leading operands).
- We can parse it without needing to set up operand parsing.
- GAS's input scrubber will ensure mnemonics are lowercase, but we may
- not be called from GAS. */
- p = CGEN_INSN_MNEMONIC (insn);
- while (*p && TOLOWER (*p) == TOLOWER (*str))
- ++p, ++str;
- if (* p)
- return _("unrecognized instruction");
- #ifndef CGEN_MNEMONIC_OPERANDS
- if (* str && ! ISSPACE (* str))
- return _("unrecognized instruction");
- #endif
- CGEN_INIT_PARSE (cd);
- cgen_init_parse_operand (cd);
- #ifdef CGEN_MNEMONIC_OPERANDS
- past_opcode_p = 0;
- #endif
- /* We don't check for (*str != '\0') here because we want to parse
- any trailing fake arguments in the syntax string. */
- syn = CGEN_SYNTAX_STRING (syntax);
- /* Mnemonics come first for now, ensure valid string. */
- if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
- abort ();
- ++syn;
- while (* syn != 0)
- {
- /* Non operand chars must match exactly. */
- if (CGEN_SYNTAX_CHAR_P (* syn))
- {
- /* FIXME: While we allow for non-GAS callers above, we assume the
- first char after the mnemonic part is a space. */
- /* FIXME: We also take inappropriate advantage of the fact that
- GAS's input scrubber will remove extraneous blanks. */
- if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
- {
- #ifdef CGEN_MNEMONIC_OPERANDS
- if (CGEN_SYNTAX_CHAR(* syn) == ' ')
- past_opcode_p = 1;
- #endif
- ++ syn;
- ++ str;
- }
- else if (*str)
- {
- /* Syntax char didn't match. Can't be this insn. */
- static char msg [80];
- /* xgettext:c-format */
- sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
- CGEN_SYNTAX_CHAR(*syn), *str);
- return msg;
- }
- else
- {
- /* Ran out of input. */
- static char msg [80];
- /* xgettext:c-format */
- sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
- CGEN_SYNTAX_CHAR(*syn));
- return msg;
- }
- continue;
- }
- #ifdef CGEN_MNEMONIC_OPERANDS
- (void) past_opcode_p;
- #endif
- /* We have an operand of some sort. */
- errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
- if (errmsg)
- return errmsg;
- /* Done with this operand, continue with next one. */
- ++ syn;
- }
- /* If we're at the end of the syntax string, we're done. */
- if (* syn == 0)
- {
- /* FIXME: For the moment we assume a valid `str' can only contain
- blanks now. IE: We needn't try again with a longer version of
- the insn and it is assumed that longer versions of insns appear
- before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
- while (ISSPACE (* str))
- ++ str;
- if (* str != '\0')
- return _("junk at end of line"); /* FIXME: would like to include `str' */
- return NULL;
- }
- /* We couldn't parse it. */
- return _("unrecognized instruction");
- }
- /* Main entry point.
- This routine is called for each instruction to be assembled.
- STR points to the insn to be assembled.
- We assume all necessary tables have been initialized.
- The assembled instruction, less any fixups, is stored in BUF.
- Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
- still needs to be converted to target byte order, otherwise BUF is an array
- of bytes in target byte order.
- The result is a pointer to the insn's entry in the opcode table,
- or NULL if an error occured (an error message will have already been
- printed).
- Note that when processing (non-alias) macro-insns,
- this function recurses.
- ??? It's possible to make this cpu-independent.
- One would have to deal with a few minor things.
- At this point in time doing so would be more of a curiosity than useful
- [for example this file isn't _that_ big], but keeping the possibility in
- mind helps keep the design clean. */
- const CGEN_INSN *
- or1k_cgen_assemble_insn (CGEN_CPU_DESC cd,
- const char *str,
- CGEN_FIELDS *fields,
- CGEN_INSN_BYTES_PTR buf,
- char **errmsg)
- {
- const char *start;
- CGEN_INSN_LIST *ilist;
- const char *parse_errmsg = NULL;
- const char *insert_errmsg = NULL;
- int recognized_mnemonic = 0;
- /* Skip leading white space. */
- while (ISSPACE (* str))
- ++ str;
- /* The instructions are stored in hashed lists.
- Get the first in the list. */
- ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
- /* Keep looking until we find a match. */
- start = str;
- for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
- {
- const CGEN_INSN *insn = ilist->insn;
- recognized_mnemonic = 1;
- #ifdef CGEN_VALIDATE_INSN_SUPPORTED
- /* Not usually needed as unsupported opcodes
- shouldn't be in the hash lists. */
- /* Is this insn supported by the selected cpu? */
- if (! or1k_cgen_insn_supported (cd, insn))
- continue;
- #endif
- /* If the RELAXED attribute is set, this is an insn that shouldn't be
- chosen immediately. Instead, it is used during assembler/linker
- relaxation if possible. */
- if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
- continue;
- str = start;
- /* Skip this insn if str doesn't look right lexically. */
- if (CGEN_INSN_RX (insn) != NULL &&
- regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
- continue;
- /* Allow parse/insert handlers to obtain length of insn. */
- CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
- parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
- if (parse_errmsg != NULL)
- continue;
- /* ??? 0 is passed for `pc'. */
- insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
- (bfd_vma) 0);
- if (insert_errmsg != NULL)
- continue;
- /* It is up to the caller to actually output the insn and any
- queued relocs. */
- return insn;
- }
- {
- static char errbuf[150];
- const char *tmp_errmsg;
- #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
- #define be_verbose 1
- #else
- #define be_verbose 0
- #endif
- if (be_verbose)
- {
- /* If requesting verbose error messages, use insert_errmsg.
- Failing that, use parse_errmsg. */
- tmp_errmsg = (insert_errmsg ? insert_errmsg :
- parse_errmsg ? parse_errmsg :
- recognized_mnemonic ?
- _("unrecognized form of instruction") :
- _("unrecognized instruction"));
- if (strlen (start) > 50)
- /* xgettext:c-format */
- sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
- else
- /* xgettext:c-format */
- sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
- }
- else
- {
- if (strlen (start) > 50)
- /* xgettext:c-format */
- sprintf (errbuf, _("bad instruction `%.50s...'"), start);
- else
- /* xgettext:c-format */
- sprintf (errbuf, _("bad instruction `%.50s'"), start);
- }
- *errmsg = errbuf;
- return NULL;
- }
- }
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