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- /* OpenRISC 1000 opcode support. -*- C -*-
- Copyright 2000-2014 Free Software Foundation, Inc.
- Originally ontributed for OR32 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, see <http://www.gnu.org/licenses/>. */
- /* This file is an addendum to or1k.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 CGEN_DIS_HASH(buffer, value) (((unsigned char *) (buffer))[0] >> 2)
- /* Check applicability of instructions against machines. */
- #define CGEN_VALIDATE_INSN_SUPPORTED
- extern int or1k_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);
- /* -- */
- /* -- opc.c */
- /* Special check to ensure that instruction exists for given machine. */
- int
- or1k_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
- {
- int machs = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH);
- /* No mach attribute? Assume it's supported for all machs. */
- if (machs == 0)
- return 1;
- return ((machs & cd->machs) != 0);
- }
- /* -- */
- /* -- 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;
- }
- /* -- */
- /* -- dis.c */
- static void
- print_regpair (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
- void * dis_info,
- long value,
- unsigned int attrs ATTRIBUTE_UNUSED,
- bfd_vma pc ATTRIBUTE_UNUSED,
- int length ATTRIBUTE_UNUSED)
- {
- disassemble_info *info = dis_info;
- char reg1_index;
- char reg2_index;
- reg1_index = value & 0x1f;
- reg2_index = reg1_index + ((value & (1 << 5)) ? 2 : 1);
- (*info->fprintf_func) (info->stream, "r%d,r%d", reg1_index, reg2_index);
- }
- /* -- */
- /* -- ibd.h */
- /* -- */
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