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Diffstat (limited to 'cpu/m32r.opc')
| -rw-r--r-- | cpu/m32r.opc | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/cpu/m32r.opc b/cpu/m32r.opc new file mode 100644 index 0000000000..dbb6f1d7b9 --- /dev/null +++ b/cpu/m32r.opc @@ -0,0 +1,302 @@ +/* M32R opcode support. -*- C -*- + + Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc. + + Contributed by Red Hat Inc; developed under contract from + Mitsubishi Electric Corporation. + + This file is part of the GNU Binutils. + + Contributed by Red Hat Inc; developed under contract from Fujitsu. + + This file is part of the GNU Binutils. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + + +/* This file is an addendum to m32r.cpu. Heavy use of C code isn't + appropriate in .cpu files, so it resides here. This especially applies + to assembly/disassembly where parsing/printing can be quite involved. + Such things aren't really part of the specification of the cpu, per se, + so .cpu files provide the general framework and .opc files handle the + nitty-gritty details as necessary. + + Each section is delimited with start and end markers. + + <arch>-opc.h additions use: "-- opc.h" + <arch>-opc.c additions use: "-- opc.c" + <arch>-asm.c additions use: "-- asm.c" + <arch>-dis.c additions use: "-- dis.c" + <arch>-ibd.h additions use: "-- ibd.h" +*/ + +/* -- opc.h */ + +#undef CGEN_DIS_HASH_SIZE +#define CGEN_DIS_HASH_SIZE 256 +#undef CGEN_DIS_HASH +#define X(b) (((unsigned char *) (b))[0] & 0xf0) +#define CGEN_DIS_HASH(buffer, value) \ +(X (buffer) | \ + (X (buffer) == 0x40 || X (buffer) == 0xe0 || X (buffer) == 0x60 || X (buffer) == 0x50 ? 0 \ + : X (buffer) == 0x70 || X (buffer) == 0xf0 ? (((unsigned char *) (buffer))[0] & 0xf) \ + : X (buffer) == 0x30 ? ((((unsigned char *) (buffer))[1] & 0x70) >> 4) \ + : ((((unsigned char *) (buffer))[1] & 0xf0) >> 4))) + +/* -- */ + +/* -- asm.c */ +static const char * parse_hash + PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); +static const char * parse_hi16 + PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); +static const char * parse_slo16 + PARAMS ((CGEN_CPU_DESC, const char **, int, long *)); +static const char * parse_ulo16 + PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); + +/* Handle '#' prefixes (i.e. skip over them). */ + +static const char * +parse_hash (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; + const char **strp; + int opindex ATTRIBUTE_UNUSED; + unsigned long *valuep ATTRIBUTE_UNUSED; +{ + if (**strp == '#') + ++*strp; + return NULL; +} + +/* Handle shigh(), high(). */ + +static const char * +parse_hi16 (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + bfd_vma value; + + if (**strp == '#') + ++*strp; + + if (strncasecmp (*strp, "high(", 5) == 0) + { + *strp += 5; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value >>= 16; + *valuep = value; + return errmsg; + } + else if (strncasecmp (*strp, "shigh(", 6) == 0) + { + *strp += 6; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value = (value >> 16) + (value & 0x8000 ? 1 : 0); + *valuep = value; + return errmsg; + } + + return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); +} + +/* Handle low() in a signed context. Also handle sda(). + The signedness of the value doesn't matter to low(), but this also + handles the case where low() isn't present. */ + +static const char * +parse_slo16 (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + long *valuep; +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + bfd_vma value; + + if (**strp == '#') + ++*strp; + + if (strncasecmp (*strp, "low(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value &= 0xffff; + *valuep = value; + return errmsg; + } + + if (strncasecmp (*strp, "sda(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16, + NULL, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + *valuep = value; + return errmsg; + } + + return cgen_parse_signed_integer (cd, strp, opindex, valuep); +} + +/* Handle low() in an unsigned context. + The signedness of the value doesn't matter to low(), but this also + handles the case where low() isn't present. */ + +static const char * +parse_ulo16 (cd, strp, opindex, valuep) + CGEN_CPU_DESC cd; + const char **strp; + int opindex; + unsigned long *valuep; +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + bfd_vma value; + + if (**strp == '#') + ++*strp; + + if (strncasecmp (*strp, "low(", 4) == 0) + { + *strp += 4; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16, + &result_type, &value); + if (**strp != ')') + return "missing `)'"; + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value &= 0xffff; + *valuep = value; + return errmsg; + } + + return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); +} + +/* -- */ + +/* -- dis.c */ +static void print_hash PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int)); +static int my_print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *)); + +/* Immediate values are prefixed with '#'. */ + +#define CGEN_PRINT_NORMAL(cd, info, value, attrs, pc, length) \ + do \ + { \ + if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_HASH_PREFIX)) \ + (*info->fprintf_func) (info->stream, "#"); \ + } \ + while (0) + +/* Handle '#' prefixes as operands. */ + +static void +print_hash (cd, dis_info, value, attrs, pc, length) + CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; + PTR dis_info; + long value ATTRIBUTE_UNUSED; + unsigned int attrs ATTRIBUTE_UNUSED; + bfd_vma pc ATTRIBUTE_UNUSED; + int length ATTRIBUTE_UNUSED; +{ + disassemble_info *info = (disassemble_info *) dis_info; + (*info->fprintf_func) (info->stream, "#"); +} + +#undef CGEN_PRINT_INSN +#define CGEN_PRINT_INSN my_print_insn + +static int +my_print_insn (cd, pc, info) + CGEN_CPU_DESC cd; + bfd_vma pc; + disassemble_info *info; +{ + char buffer[CGEN_MAX_INSN_SIZE]; + char *buf = buffer; + int status; + int buflen = (pc & 3) == 0 ? 4 : 2; + + /* Read the base part of the insn. */ + + status = (*info->read_memory_func) (pc, buf, buflen, info); + if (status != 0) + { + (*info->memory_error_func) (status, pc, info); + return -1; + } + + /* 32 bit insn? */ + if ((pc & 3) == 0 && (buf[0] & 0x80) != 0) + return print_insn (cd, pc, info, buf, buflen); + + /* Print the first insn. */ + if ((pc & 3) == 0) + { + if (print_insn (cd, pc, info, buf, 2) == 0) + (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); + buf += 2; + } + + if (buf[0] & 0x80) + { + /* Parallel. */ + (*info->fprintf_func) (info->stream, " || "); + buf[0] &= 0x7f; + } + else + (*info->fprintf_func) (info->stream, " -> "); + + /* The "& 3" is to pass a consistent address. + Parallel insns arguably both begin on the word boundary. + Also, branch insns are calculated relative to the word boundary. */ + if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0) + (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); + + return (pc & 3) ? 2 : 4; +} + +/* -- */ |