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Diffstat (limited to 'cpu/openrisc.opc')
| -rw-r--r-- | cpu/openrisc.opc | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/cpu/openrisc.opc b/cpu/openrisc.opc new file mode 100644 index 0000000..291be51 --- /dev/null +++ b/cpu/openrisc.opc @@ -0,0 +1,164 @@ +/* OpenRISC opcode support. -*- C -*- + Copyright 2000, 2001, 2003, 2005, 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 or32.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 64 +#undef CGEN_DIS_HASH +#define CGEN_DIS_HASH(buffer, value) (((unsigned char *) (buffer))[0] >> 2) + +extern long openrisc_sign_extend_16bit (long); +/* -- */ + +/* -- opc.c */ +/* -- */ + +/* -- asm.c */ + +static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'"); + +#define CGEN_VERBOSE_ASSEMBLER_ERRORS + +long +openrisc_sign_extend_16bit (long value) +{ + return ((value & 0xffff) ^ 0x8000) - 0x8000; +} + +/* Handle hi(). */ + +static const char * +parse_hi16 (CGEN_CPU_DESC cd, const char ** strp, int opindex, long * valuep) +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + unsigned long ret; + + if (**strp == '#') + ++*strp; + + if (strncasecmp (*strp, "hi(", 3) == 0) + { + bfd_vma value; + + *strp += 3; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, + & result_type, & value); + if (**strp != ')') + return MISSING_CLOSING_PARENTHESIS; + + ++*strp; + if (errmsg == NULL + && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) + value >>= 16; + ret = value; + } + else + { + if (**strp == '-') + { + long value; + + errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); + ret = value; + } + else + { + unsigned long value; + + errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); + ret = value; + } + } + + *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; + return errmsg; +} + +/* Handle lo(). */ + +static const char * +parse_lo16 (CGEN_CPU_DESC cd, const char ** strp, int opindex, long * valuep) +{ + const char *errmsg; + enum cgen_parse_operand_result result_type; + unsigned long ret; + + if (**strp == '#') + ++*strp; + + if (strncasecmp (*strp, "lo(", 3) == 0) + { + bfd_vma value; + + *strp += 3; + errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, + & result_type, & value); + if (**strp != ')') + return MISSING_CLOSING_PARENTHESIS; + + ++*strp; + ret = value; + } + else + { + if (**strp == '-') + { + long value; + + errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); + ret = value; + } + else + { + unsigned long value; + + errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); + ret = value; + } + } + + *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; + return errmsg; +} + +/* -- */ + +/* -- ibd.h */ +extern long openrisc_sign_extend_16bit (long); + +/* -- */ |