diff options
Diffstat (limited to 'binutils-2.25/cpu/xstormy16.opc')
| -rw-r--r-- | binutils-2.25/cpu/xstormy16.opc | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/binutils-2.25/cpu/xstormy16.opc b/binutils-2.25/cpu/xstormy16.opc new file mode 100644 index 00000000..6d2d16c1 --- /dev/null +++ b/binutils-2.25/cpu/xstormy16.opc @@ -0,0 +1,168 @@ +/* XSTORMY16 opcode support. -*- C -*- + Copyright 2011 Free Software Foundation, Inc. + + Contributed by Red Hat Inc; + + 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 3 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., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +/* This file is an addendum to xstormy16.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 */ + +/* Allows reason codes to be output when assembler errors occur. */ +#define CGEN_VERBOSE_ASSEMBLER_ERRORS + +/* We can't use the default hash size because many bits are used by + operands. */ +#define CGEN_DIS_HASH_SIZE 1 +#define CGEN_DIS_HASH(buf, value) 0 +/* -- */ + +/* -- asm.c */ + +/* The machine-independent code doesn't know how to disambiguate + mov (foo),r3 + and + mov (r2),r3 + where 'foo' is a label. This helps it out. */ + +static const char * +parse_mem8 (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + unsigned long *valuep) +{ + if (**strp == '(') + { + const char *s = *strp; + + if (s[1] == '-' && s[2] == '-') + return _("Bad register in preincrement"); + + while (ISALNUM (*++s)) + ; + if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ',')) + return _("Bad register in postincrement"); + if (s[0] == ',' || s[0] == ')') + return _("Bad register name"); + } + else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, + (long *) valuep) == NULL) + return _("Label conflicts with register name"); + else if (strncasecmp (*strp, "rx,", 3) == 0 + || strncasecmp (*strp, "rxl,", 3) == 0 + || strncasecmp (*strp, "rxh,", 3) == 0) + return _("Label conflicts with `Rx'"); + else if (**strp == '#') + return _("Bad immediate expression"); + + return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); +} + +/* For the add and subtract instructions, there are two immediate forms, + one for small operands and one for large ones. We want to use + the small one when possible, but we do not want to generate relocs + of the small size. This is somewhat tricky. */ + +static const char * +parse_small_immediate (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + unsigned long *valuep) +{ + bfd_vma value; + enum cgen_parse_operand_result result; + const char *errmsg; + + if (**strp == '@') + return _("No relocation for small immediate"); + + errmsg = (* cd->parse_operand_fn) + (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, + & result, & value); + + if (errmsg) + return errmsg; + + if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER) + return _("Small operand was not an immediate number"); + + *valuep = value; + return NULL; +} + +/* Literal scan be either a normal literal, a @hi() or @lo relocation. */ + +static const char * +parse_immediate16 (CGEN_CPU_DESC cd, + const char **strp, + int opindex, + unsigned long *valuep) +{ + const char *errmsg; + enum cgen_parse_operand_result result; + bfd_reloc_code_real_type code = BFD_RELOC_NONE; + bfd_vma value; + + if (strncmp (*strp, "@hi(", 4) == 0) + { + *strp += 4; + code = BFD_RELOC_HI16; + } + else + if (strncmp (*strp, "@lo(", 4) == 0) + { + *strp += 4; + code = BFD_RELOC_LO16; + } + + if (code == BFD_RELOC_NONE) + errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep); + else + { + errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value); + if ((errmsg == NULL) && + (result != CGEN_PARSE_OPERAND_RESULT_QUEUED)) + errmsg = _("Operand is not a symbol"); + + *valuep = value; + if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16) + && **strp == ')') + *strp += 1; + else + { + errmsg = _("Syntax error: No trailing ')'"); + return errmsg; + } + } + return errmsg; +} +/* -- */ |