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40c75bc8b0
PR 25224 gas * config/tc-z80.c (emit_ld_m_rr): Use integer types when checking opcode byte values. (emit_ld_r_r): Likewise. (emit_ld_rr_m): Likewise. (emit_ld_rr_nn): Likewise. opcodes * z80-dis.c (ld_ii_ii): Use character constant when checking opcode byte value.
3673 lines
84 KiB
C
3673 lines
84 KiB
C
/* tc-z80.c -- Assemble code for the Zilog Z80, Z180, EZ80 and ASCII R800
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Copyright (C) 2005-2020 Free Software Foundation, Inc.
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Contributed by Arnold Metselaar <arnold_m@operamail.com>
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "as.h"
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#include "safe-ctype.h"
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#include "subsegs.h"
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#include "elf/z80.h"
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/* Exported constants. */
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const char comment_chars[] = ";\0";
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const char line_comment_chars[] = "#;\0";
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const char line_separator_chars[] = "\0";
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const char EXP_CHARS[] = "eE\0";
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const char FLT_CHARS[] = "RrFf\0";
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/* For machine specific options. */
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const char * md_shortopts = ""; /* None yet. */
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enum options
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{
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OPTION_MACH_Z80 = OPTION_MD_BASE,
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OPTION_MACH_R800,
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OPTION_MACH_Z180,
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OPTION_MACH_EZ80_Z80,
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OPTION_MACH_EZ80_ADL,
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OPTION_MACH_GBZ80,
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OPTION_MACH_INST,
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OPTION_MACH_NO_INST,
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OPTION_MACH_IUD,
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OPTION_MACH_WUD,
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OPTION_MACH_FUD,
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OPTION_MACH_IUP,
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OPTION_MACH_WUP,
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OPTION_MACH_FUP,
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OPTION_FLOAT_FORMAT,
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OPTION_DOUBLE_FORMAT,
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OPTION_COMPAT_LL_PREFIX,
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OPTION_COMPAT_COLONLESS,
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OPTION_COMPAT_SDCC
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};
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#define INS_Z80 (1 << 0)
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#define INS_R800 (1 << 1)
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#define INS_GBZ80 (1 << 2)
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#define INS_Z180 (1 << 3)
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#define INS_EZ80 (1 << 4)
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#define INS_MARCH_MASK 0xffff
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#define INS_IDX_HALF (1 << 16)
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#define INS_IN_F_C (1 << 17)
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#define INS_OUT_C_0 (1 << 18)
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#define INS_SLI (1 << 19)
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#define INS_ROT_II_LD (1 << 20) /* instructions like SLA (ii+d),r; which is: LD r,(ii+d); SLA r; LD (ii+d),r */
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#define INS_TUNE_MASK 0xffff0000
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#define INS_NOT_GBZ80 (INS_Z80 | INS_Z180 | INS_R800 | INS_EZ80)
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#define INS_ALL 0
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#define INS_UNDOC (INS_IDX_HALF | INS_IN_F_C)
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#define INS_UNPORT (INS_OUT_C_0 | INS_SLI | INS_ROT_II_LD)
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struct option md_longopts[] =
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{
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{ "z80", no_argument, NULL, OPTION_MACH_Z80},
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{ "r800", no_argument, NULL, OPTION_MACH_R800},
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{ "z180", no_argument, NULL, OPTION_MACH_Z180},
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{ "ez80", no_argument, NULL, OPTION_MACH_EZ80_Z80},
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{ "ez80-adl", no_argument, NULL, OPTION_MACH_EZ80_ADL},
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{ "float", required_argument, NULL, OPTION_FLOAT_FORMAT},
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{ "double", required_argument, NULL, OPTION_DOUBLE_FORMAT},
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{ "strict", no_argument, NULL, OPTION_MACH_FUD},
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{ "full", no_argument, NULL, OPTION_MACH_IUP},
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{ "with-inst", required_argument, NULL, OPTION_MACH_INST},
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{ "Wnins", required_argument, NULL, OPTION_MACH_INST},
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{ "without-inst", required_argument, NULL, OPTION_MACH_NO_INST},
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{ "local-prefix", required_argument, NULL, OPTION_COMPAT_LL_PREFIX},
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{ "colonless", no_argument, NULL, OPTION_COMPAT_COLONLESS},
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{ "sdcc", no_argument, NULL, OPTION_COMPAT_SDCC},
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{ "Fins", required_argument, NULL, OPTION_MACH_NO_INST},
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{ "ignore-undocumented-instructions", no_argument, NULL, OPTION_MACH_IUD },
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{ "Wnud", no_argument, NULL, OPTION_MACH_IUD },
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{ "warn-undocumented-instructions", no_argument, NULL, OPTION_MACH_WUD },
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{ "Wud", no_argument, NULL, OPTION_MACH_WUD },
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{ "forbid-undocumented-instructions", no_argument, NULL, OPTION_MACH_FUD },
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{ "Fud", no_argument, NULL, OPTION_MACH_FUD },
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{ "ignore-unportable-instructions", no_argument, NULL, OPTION_MACH_IUP },
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{ "Wnup", no_argument, NULL, OPTION_MACH_IUP },
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{ "warn-unportable-instructions", no_argument, NULL, OPTION_MACH_WUP },
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{ "Wup", no_argument, NULL, OPTION_MACH_WUP },
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{ "forbid-unportable-instructions", no_argument, NULL, OPTION_MACH_FUP },
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{ "Fup", no_argument, NULL, OPTION_MACH_FUP },
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{ NULL, no_argument, NULL, 0 }
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} ;
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size_t md_longopts_size = sizeof (md_longopts);
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extern int coff_flags;
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/* Instruction classes that silently assembled. */
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static int ins_ok = INS_Z80 | INS_UNDOC;
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/* Instruction classes that generate errors. */
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static int ins_err = ~(INS_Z80 | INS_UNDOC);
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/* eZ80 CPU mode (ADL or Z80) */
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static int cpu_mode = 0; /* 0 - Z80, 1 - ADL */
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/* accept SDCC specific instruction encoding */
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static int sdcc_compat = 0;
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/* accept colonless labels */
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static int colonless_labels = 0;
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/* local label prefix (NULL - default) */
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static const char *local_label_prefix = NULL;
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/* floating point support */
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typedef const char *(*str_to_float_t)(char *litP, int *sizeP);
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static str_to_float_t str_to_float;
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static str_to_float_t str_to_double;
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/* mode of current instruction */
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#define INST_MODE_S 0 /* short data mode */
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#define INST_MODE_IS 0 /* short instruction mode */
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#define INST_MODE_L 2 /* long data mode */
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#define INST_MODE_IL 1 /* long instruction mode */
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#define INST_MODE_FORCED 4 /* CPU mode changed by instruction suffix*/
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static char inst_mode;
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static int
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setup_instruction (const char *inst, int *add, int *sub)
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{
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int n;
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if (!strcmp (inst, "idx-reg-halves"))
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n = INS_IDX_HALF;
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else if (!strcmp (inst, "sli"))
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n = INS_SLI;
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else if (!strcmp (inst, "op-ii-ld"))
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n = INS_ROT_II_LD;
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else if (!strcmp (inst, "in-f-c"))
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n = INS_IN_F_C;
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else if (!strcmp (inst, "out-c-0"))
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n = INS_OUT_C_0;
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else
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return 0;
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*add |= n;
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*sub &= ~n;
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return 1;
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}
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static const char *
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str_to_zeda32 (char *litP, int *sizeP);
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static const char *
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str_to_float48 (char *litP, int *sizeP);
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static str_to_float_t
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get_str_to_float (const char *arg)
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{
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if (strcasecmp (arg, "zeda32") == 0)
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return str_to_zeda32;
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if (strcasecmp (arg, "math48") == 0)
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return str_to_float48;
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if (strcasecmp (arg, "ieee754") != 0)
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as_fatal (_("invalid floating point numbers type `%s'"), arg);
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return NULL;
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}
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static int
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setup_instruction_list (const char *list, int *add, int *sub)
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{
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char buf[16];
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const char *b;
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const char *e;
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int sz;
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int res = 0;
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for (b = list; *b != '\0';)
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{
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e = strchr (b, ',');
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if (e == NULL)
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sz = strlen (b);
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else
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sz = e - b;
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if (sz == 0 || sz >= (int)sizeof (buf))
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{
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as_bad (_("invalid INST in command line: %s"), b);
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return 0;
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}
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memcpy (buf, b, sz);
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buf[sz] = '\0';
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if (setup_instruction (buf, add, sub))
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res++;
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else
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{
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as_bad (_("invalid INST in command line: %s"), buf);
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return 0;
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}
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b = &b[sz];
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if (*b == ',')
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++b;
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}
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return res;
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}
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int
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md_parse_option (int c, const char* arg)
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{
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switch (c)
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{
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default:
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return 0;
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case OPTION_MACH_Z80:
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ins_ok = (ins_ok & INS_TUNE_MASK) | INS_Z80;
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ins_err = (ins_err & INS_MARCH_MASK) | (~INS_Z80 & INS_MARCH_MASK);
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break;
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case OPTION_MACH_R800:
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ins_ok = INS_R800 | INS_IDX_HALF;
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ins_err = INS_UNPORT;
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break;
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case OPTION_MACH_Z180:
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ins_ok = INS_Z180;
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ins_err = INS_UNDOC | INS_UNPORT;
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break;
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case OPTION_MACH_EZ80_Z80:
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ins_ok = INS_EZ80;
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ins_err = (INS_UNDOC | INS_UNPORT) & ~INS_IDX_HALF;
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cpu_mode = 0;
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break;
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case OPTION_MACH_EZ80_ADL:
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ins_ok = INS_EZ80;
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ins_err = (INS_UNDOC | INS_UNPORT) & ~INS_IDX_HALF;
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cpu_mode = 1;
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break;
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case OPTION_MACH_GBZ80:
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ins_ok = INS_GBZ80;
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ins_err = INS_UNDOC | INS_UNPORT;
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break;
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case OPTION_FLOAT_FORMAT:
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str_to_float = get_str_to_float (arg);
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break;
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case OPTION_DOUBLE_FORMAT:
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str_to_double = get_str_to_float (arg);
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break;
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case OPTION_MACH_INST:
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if ((ins_ok & INS_GBZ80) == 0)
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return setup_instruction_list (arg, & ins_ok, & ins_err);
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break;
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case OPTION_MACH_NO_INST:
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if ((ins_ok & INS_GBZ80) == 0)
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return setup_instruction_list (arg, & ins_err, & ins_ok);
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break;
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case OPTION_MACH_WUD:
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case OPTION_MACH_IUD:
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if ((ins_ok & INS_GBZ80) == 0)
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{
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ins_ok |= INS_UNDOC;
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ins_err &= ~INS_UNDOC;
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}
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break;
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case OPTION_MACH_WUP:
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case OPTION_MACH_IUP:
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if ((ins_ok & INS_GBZ80) == 0)
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{
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ins_ok |= INS_UNDOC | INS_UNPORT;
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ins_err &= ~(INS_UNDOC | INS_UNPORT);
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}
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break;
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case OPTION_MACH_FUD:
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if ((ins_ok & (INS_R800 | INS_GBZ80)) == 0)
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{
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ins_ok &= (INS_UNDOC | INS_UNPORT);
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ins_err |= INS_UNDOC | INS_UNPORT;
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}
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break;
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case OPTION_MACH_FUP:
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ins_ok &= ~INS_UNPORT;
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ins_err |= INS_UNPORT;
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break;
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case OPTION_COMPAT_LL_PREFIX:
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local_label_prefix = (arg && *arg) ? arg : NULL;
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break;
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case OPTION_COMPAT_SDCC:
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sdcc_compat = 1;
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local_label_prefix = "_";
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break;
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case OPTION_COMPAT_COLONLESS:
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colonless_labels = 1;
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break;
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}
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return 1;
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}
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void
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md_show_usage (FILE * f)
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{
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fprintf (f, "\n\
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CPU model options:\n\
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-z80\t\t\t assemble for Z80\n\
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-r800\t\t\t assemble for R800\n\
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-z180\t\t\t assemble for Z180\n\
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-ez80\t\t\t assemble for eZ80 in Z80 mode by default\n\
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-ez80-adl\t\t assemble for eZ80 in ADL mode by default\n\
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\n\
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Compatibility options:\n\
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-local-prefix=TEXT\t treat labels prefixed by TEXT as local\n\
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-colonless\t\t permit colonless labels\n\
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-sdcc\t\t\t accept SDCC specific instruction syntax\n\
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-float=FORMAT\t\t set floating point numbers format\n\
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-double=FORMAT\t\t set floating point numbers format\n\
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Where FORMAT one of:\n\
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ieee754\t\t IEEE754 compatible\n\
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zeda32\t\t\t Zeda z80float library 32 bit format\n\
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math48\t\t 48 bit format from Math48 library\n\
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\n\
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Support for known undocumented instructions:\n\
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-strict\t\t assemble only documented instructions\n\
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-full\t\t\t assemble all undocumented instructions\n\
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-with-inst=INST[,...]\n\
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-Wnins INST[,...]\t assemble specified instruction(s)\n\
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-without-inst=INST[,...]\n\
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-Fins INST[,...]\t do not assemble specified instruction(s)\n\
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Where INST is one of:\n\
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idx-reg-halves\t instructions with halves of index registers\n\
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sli\t\t\t instruction SLI/SLL\n\
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op-ii-ld\t\t instructions like SLA (II+dd),R (opcodes DD/FD CB dd xx)\n\
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in-f-c\t\t instruction IN F,(C)\n\
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out-c-0\t\t instruction OUT (C),0\n\
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\n\
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Obsolete options:\n\
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-ignore-undocumented-instructions\n\
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-Wnud\t\t\t silently assemble undocumented Z80-instructions that work on R800\n\
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-ignore-unportable-instructions\n\
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-Wnup\t\t\t silently assemble all undocumented Z80-instructions\n\
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-warn-undocumented-instructions\n\
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-Wud\t\t\t issue warnings for undocumented Z80-instructions that work on R800\n\
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-warn-unportable-instructions\n\
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-Wup\t\t\t issue warnings for other undocumented Z80-instructions\n\
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-forbid-undocumented-instructions\n\
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-Fud\t\t\t treat all undocumented Z80-instructions as errors\n\
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-forbid-unportable-instructions\n\
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-Fup\t\t\t treat undocumented Z80-instructions that do not work on R800 as errors\n\
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\n\
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Default: -z80 -ignore-undocumented-instructions -warn-unportable-instructions.\n");
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}
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static symbolS * zero;
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struct reg_entry
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{
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const char* name;
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int number;
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};
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#define R_STACKABLE (0x80)
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#define R_ARITH (0x40)
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#define R_IX (0x20)
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#define R_IY (0x10)
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#define R_INDEX (R_IX | R_IY)
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#define REG_A (7)
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#define REG_B (0)
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#define REG_C (1)
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#define REG_D (2)
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#define REG_E (3)
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#define REG_H (4)
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#define REG_L (5)
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#define REG_F (6 | 8)
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#define REG_I (9)
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#define REG_R (10)
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#define REG_MB (11)
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#define REG_AF (3 | R_STACKABLE)
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#define REG_BC (0 | R_STACKABLE | R_ARITH)
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#define REG_DE (1 | R_STACKABLE | R_ARITH)
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#define REG_HL (2 | R_STACKABLE | R_ARITH)
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#define REG_IX (REG_HL | R_IX)
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#define REG_IY (REG_HL | R_IY)
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#define REG_SP (3 | R_ARITH)
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static const struct reg_entry regtable[] =
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{
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{"a", REG_A },
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{"af", REG_AF },
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{"b", REG_B },
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{"bc", REG_BC },
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{"c", REG_C },
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{"d", REG_D },
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{"de", REG_DE },
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{"e", REG_E },
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{"f", REG_F },
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{"h", REG_H },
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{"hl", REG_HL },
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{"i", REG_I },
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{"ix", REG_IX },
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{"ixh",REG_H | R_IX },
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{"ixl",REG_L | R_IX },
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{"iy", REG_IY },
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{"iyh",REG_H | R_IY },
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{"iyl",REG_L | R_IY },
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{"l", REG_L },
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{"mb", REG_MB },
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{"r", REG_R },
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{"sp", REG_SP },
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} ;
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#define BUFLEN 8 /* Large enough for any keyword. */
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void
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md_begin (void)
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{
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expressionS nul, reg;
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char * p;
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unsigned int i, j, k;
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char buf[BUFLEN];
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if (ins_ok & INS_EZ80) /* if select EZ80 cpu then */
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listing_lhs_width = 6; /* use 6 bytes per line in the listing */
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reg.X_op = O_register;
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reg.X_md = 0;
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reg.X_add_symbol = reg.X_op_symbol = 0;
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for ( i = 0 ; i < ARRAY_SIZE ( regtable ) ; ++i )
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{
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reg.X_add_number = regtable[i].number;
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k = strlen ( regtable[i].name );
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buf[k] = 0;
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if ( k+1 < BUFLEN )
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{
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for ( j = ( 1<<k ) ; j ; --j )
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{
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for ( k = 0 ; regtable[i].name[k] ; ++k )
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{
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buf[k] = ( j & ( 1<<k ) ) ? TOUPPER (regtable[i].name[k]) : regtable[i].name[k];
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}
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|
symbolS * psym = symbol_find_or_make (buf);
|
|
S_SET_SEGMENT (psym, reg_section);
|
|
symbol_set_value_expression (psym, ®);
|
|
}
|
|
}
|
|
}
|
|
p = input_line_pointer;
|
|
input_line_pointer = (char *) "0";
|
|
nul.X_md=0;
|
|
expression (& nul);
|
|
input_line_pointer = p;
|
|
zero = make_expr_symbol (& nul);
|
|
/* We do not use relaxation (yet). */
|
|
linkrelax = 0;
|
|
}
|
|
|
|
void
|
|
z80_md_end (void)
|
|
{
|
|
int mach_type;
|
|
|
|
switch (ins_ok & INS_MARCH_MASK)
|
|
{
|
|
case INS_Z80:
|
|
if (ins_ok & INS_UNPORT)
|
|
mach_type = bfd_mach_z80full;
|
|
else if (ins_ok & INS_UNDOC)
|
|
mach_type = bfd_mach_z80;
|
|
else
|
|
mach_type = bfd_mach_z80strict;
|
|
break;
|
|
case INS_R800:
|
|
mach_type = bfd_mach_r800;
|
|
break;
|
|
case INS_Z180:
|
|
mach_type = bfd_mach_z180;
|
|
break;
|
|
case INS_GBZ80:
|
|
mach_type = bfd_mach_gbz80;
|
|
break;
|
|
case INS_EZ80:
|
|
mach_type = cpu_mode ? bfd_mach_ez80_adl : bfd_mach_ez80_z80;
|
|
break;
|
|
default:
|
|
mach_type = 0;
|
|
}
|
|
|
|
bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach_type);
|
|
}
|
|
|
|
#if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
|
|
void
|
|
z80_elf_final_processing (void)
|
|
{
|
|
unsigned elf_flags;
|
|
switch (ins_ok & INS_MARCH_MASK)
|
|
{
|
|
case INS_Z80:
|
|
elf_flags = EF_Z80_MACH_Z80;
|
|
break;
|
|
case INS_R800:
|
|
elf_flags = EF_Z80_MACH_R800;
|
|
break;
|
|
case INS_Z180:
|
|
elf_flags = EF_Z80_MACH_Z180;
|
|
break;
|
|
case INS_GBZ80:
|
|
elf_flags = EF_Z80_MACH_GBZ80;
|
|
break;
|
|
case INS_EZ80:
|
|
elf_flags = cpu_mode ? EF_Z80_MACH_EZ80_ADL : EF_Z80_MACH_EZ80_Z80;
|
|
break;
|
|
default:
|
|
elf_flags = 0;
|
|
}
|
|
|
|
elf_elfheader (stdoutput)->e_flags = elf_flags;
|
|
}
|
|
#endif
|
|
|
|
static const char *
|
|
skip_space (const char *s)
|
|
{
|
|
while (*s == ' ' || *s == '\t')
|
|
++s;
|
|
return s;
|
|
}
|
|
|
|
/* A non-zero return-value causes a continue in the
|
|
function read_a_source_file () in ../read.c. */
|
|
int
|
|
z80_start_line_hook (void)
|
|
{
|
|
char *p, quote;
|
|
char buf[4];
|
|
|
|
/* Convert one character constants. */
|
|
for (p = input_line_pointer; *p && *p != '\n'; ++p)
|
|
{
|
|
switch (*p)
|
|
{
|
|
case '\'':
|
|
if (p[1] != 0 && p[1] != '\'' && p[2] == '\'')
|
|
{
|
|
snprintf (buf, 4, "%3d", (unsigned char)p[1]);
|
|
*p++ = buf[0];
|
|
*p++ = buf[1];
|
|
*p++ = buf[2];
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
case '"':
|
|
for (quote = *p++; quote != *p && '\n' != *p; ++p)
|
|
/* No escapes. */ ;
|
|
if (quote != *p)
|
|
{
|
|
as_bad (_("-- unterminated string"));
|
|
ignore_rest_of_line ();
|
|
return 1;
|
|
}
|
|
break;
|
|
case '#':
|
|
if (sdcc_compat)
|
|
*p = (*skip_space (p + 1) == '(') ? '+' : ' ';
|
|
break;
|
|
}
|
|
}
|
|
/* Check for <label>[:] [.](EQU|DEFL) <value>. */
|
|
if (is_name_beginner (*input_line_pointer))
|
|
{
|
|
char *name;
|
|
char c, *rest, *line_start;
|
|
int len;
|
|
|
|
line_start = input_line_pointer;
|
|
if (ignore_input ())
|
|
return 0;
|
|
|
|
c = get_symbol_name (&name);
|
|
rest = input_line_pointer + 1;
|
|
|
|
if (ISSPACE (c) && colonless_labels)
|
|
{
|
|
if (c == '\n')
|
|
{
|
|
bump_line_counters ();
|
|
LISTING_NEWLINE ();
|
|
}
|
|
c = ':';
|
|
}
|
|
if (c == ':' && sdcc_compat && rest[-2] != '$')
|
|
dollar_label_clear ();
|
|
if (*rest == ':')
|
|
{
|
|
/* remove second colon if SDCC compatibility enabled */
|
|
if (sdcc_compat)
|
|
*rest = ' ';
|
|
++rest;
|
|
}
|
|
rest = (char*)skip_space (rest);
|
|
if (*rest == '.')
|
|
++rest;
|
|
if (strncasecmp (rest, "EQU", 3) == 0)
|
|
len = 3;
|
|
else if (strncasecmp (rest, "DEFL", 4) == 0)
|
|
len = 4;
|
|
else
|
|
len = 0;
|
|
if (len && (!ISALPHA (rest[len])))
|
|
{
|
|
/* Handle assignment here. */
|
|
if (line_start[-1] == '\n')
|
|
{
|
|
bump_line_counters ();
|
|
LISTING_NEWLINE ();
|
|
}
|
|
input_line_pointer = rest + len - 1;
|
|
/* Allow redefining with "DEFL" (len == 4), but not with "EQU". */
|
|
equals (name, len == 4);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
/* Restore line and pointer. */
|
|
(void) restore_line_pointer (c);
|
|
input_line_pointer = line_start;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
symbolS *
|
|
md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
const char *
|
|
md_atof (int type, char *litP, int *sizeP)
|
|
{
|
|
switch (type)
|
|
{
|
|
case 'f':
|
|
case 'F':
|
|
if (str_to_float)
|
|
return str_to_float (litP, sizeP);
|
|
break;
|
|
case 'd':
|
|
case 'D':
|
|
if (str_to_double)
|
|
return str_to_double (litP, sizeP);
|
|
break;
|
|
}
|
|
return ieee_md_atof (type, litP, sizeP, FALSE);
|
|
}
|
|
|
|
valueT
|
|
md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size)
|
|
{
|
|
return size;
|
|
}
|
|
|
|
long
|
|
md_pcrel_from (fixS * fixp)
|
|
{
|
|
return fixp->fx_where + fixp->fx_frag->fr_address;
|
|
}
|
|
|
|
typedef const char * (asfunc)(char, char, const char*);
|
|
|
|
typedef struct _table_t
|
|
{
|
|
const char* name;
|
|
unsigned char prefix;
|
|
unsigned char opcode;
|
|
asfunc * fp;
|
|
unsigned inss; /*0 - all CPU types or list of supported INS_* */
|
|
} table_t;
|
|
|
|
/* Compares the key for structs that start with a char * to the key. */
|
|
static int
|
|
key_cmp (const void * a, const void * b)
|
|
{
|
|
const char *str_a, *str_b;
|
|
|
|
str_a = *((const char**)a);
|
|
str_b = *((const char**)b);
|
|
return strcmp (str_a, str_b);
|
|
}
|
|
|
|
char buf[BUFLEN];
|
|
const char *key = buf;
|
|
|
|
/* Prevent an error on a line from also generating
|
|
a "junk at end of line" error message. */
|
|
static char err_flag;
|
|
|
|
static void
|
|
error (const char * message)
|
|
{
|
|
if (err_flag)
|
|
return;
|
|
|
|
as_bad ("%s", message);
|
|
err_flag = 1;
|
|
}
|
|
|
|
static void
|
|
ill_op (void)
|
|
{
|
|
error (_("illegal operand"));
|
|
}
|
|
|
|
static void
|
|
wrong_mach (int ins_type)
|
|
{
|
|
if (ins_type & ins_err)
|
|
ill_op ();
|
|
else
|
|
as_warn (_("undocumented instruction"));
|
|
}
|
|
|
|
static void
|
|
check_mach (int ins_type)
|
|
{
|
|
if ((ins_type & ins_ok) == 0)
|
|
wrong_mach (ins_type);
|
|
}
|
|
|
|
/* Check whether an expression is indirect. */
|
|
static int
|
|
is_indir (const char *s)
|
|
{
|
|
char quote;
|
|
const char *p;
|
|
int indir, depth;
|
|
|
|
/* Indirection is indicated with parentheses. */
|
|
indir = (*s == '(');
|
|
|
|
for (p = s, depth = 0; *p && *p != ','; ++p)
|
|
{
|
|
switch (*p)
|
|
{
|
|
case '"':
|
|
case '\'':
|
|
for (quote = *p++; quote != *p && *p != '\n'; ++p)
|
|
if (*p == '\\' && p[1])
|
|
++p;
|
|
break;
|
|
case '(':
|
|
++ depth;
|
|
break;
|
|
case ')':
|
|
-- depth;
|
|
if (depth == 0)
|
|
{
|
|
p = skip_space (p + 1);
|
|
if (*p && *p != ',')
|
|
indir = 0;
|
|
--p;
|
|
}
|
|
if (depth < 0)
|
|
error (_("mismatched parentheses"));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (depth != 0)
|
|
error (_("mismatched parentheses"));
|
|
|
|
return indir;
|
|
}
|
|
|
|
/* Check whether a symbol involves a register. */
|
|
static int
|
|
contains_register (symbolS *sym)
|
|
{
|
|
if (sym)
|
|
{
|
|
expressionS * ex = symbol_get_value_expression(sym);
|
|
|
|
return (O_register == ex->X_op)
|
|
|| (ex->X_add_symbol && contains_register(ex->X_add_symbol))
|
|
|| (ex->X_op_symbol && contains_register(ex->X_op_symbol));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Parse general expression, not looking for indexed addressing. */
|
|
static const char *
|
|
parse_exp_not_indexed (const char *s, expressionS *op)
|
|
{
|
|
const char *p;
|
|
int indir;
|
|
int make_shift = -1;
|
|
|
|
p = skip_space (s);
|
|
if (sdcc_compat && (*p == '<' || *p == '>'))
|
|
{
|
|
switch (*p)
|
|
{
|
|
case '<': /* LSB request */
|
|
make_shift = 0;
|
|
break;
|
|
case '>': /* MSB request */
|
|
make_shift = cpu_mode ? 16 : 8;
|
|
break;
|
|
}
|
|
s = ++p;
|
|
p = skip_space (p);
|
|
}
|
|
|
|
op->X_md = indir = is_indir (p);
|
|
input_line_pointer = (char*) s ;
|
|
expression (op);
|
|
switch (op->X_op)
|
|
{
|
|
case O_absent:
|
|
error (_("missing operand"));
|
|
break;
|
|
case O_illegal:
|
|
error (_("bad expression syntax"));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (make_shift >= 0)
|
|
{
|
|
/* replace [op] by [op >> shift] */
|
|
expressionS data;
|
|
op->X_add_symbol = make_expr_symbol (op);
|
|
op->X_add_number = 0;
|
|
op->X_op = O_right_shift;
|
|
memset (&data, 0, sizeof (data));
|
|
data.X_op = O_constant;
|
|
data.X_add_number = make_shift;
|
|
op->X_op_symbol = make_expr_symbol (&data);
|
|
}
|
|
return input_line_pointer;
|
|
}
|
|
|
|
static int
|
|
unify_indexed (expressionS *op)
|
|
{
|
|
if (O_register != symbol_get_value_expression (op->X_add_symbol)->X_op)
|
|
return 0;
|
|
|
|
int rnum = symbol_get_value_expression (op->X_add_symbol)->X_add_number;
|
|
if ( ((REG_IX != rnum) && (REG_IY != rnum)) || contains_register (op->X_op_symbol))
|
|
{
|
|
ill_op ();
|
|
return 0;
|
|
}
|
|
|
|
/* Convert subtraction to addition of negative value. */
|
|
if (O_subtract == op->X_op)
|
|
{
|
|
expressionS minus;
|
|
minus.X_op = O_uminus;
|
|
minus.X_add_number = 0;
|
|
minus.X_add_symbol = op->X_op_symbol;
|
|
minus.X_op_symbol = 0;
|
|
op->X_op_symbol = make_expr_symbol (&minus);
|
|
op->X_op = O_add;
|
|
}
|
|
|
|
/* Clear X_add_number of the expression. */
|
|
if (op->X_add_number != 0)
|
|
{
|
|
expressionS add;
|
|
memset (&add, 0, sizeof (add));
|
|
add.X_op = O_symbol;
|
|
add.X_add_number = op->X_add_number;
|
|
add.X_add_symbol = op->X_op_symbol;
|
|
add.X_op_symbol = 0;
|
|
op->X_add_symbol = make_expr_symbol (&add);
|
|
}
|
|
else
|
|
op->X_add_symbol = op->X_op_symbol;
|
|
|
|
op->X_add_number = rnum;
|
|
op->X_op_symbol = 0;
|
|
return 1;
|
|
}
|
|
|
|
/* Parse expression, change operator to O_md1 for indexed addressing. */
|
|
static const char *
|
|
parse_exp (const char *s, expressionS *op)
|
|
{
|
|
const char* res = parse_exp_not_indexed (s, op);
|
|
switch (op->X_op)
|
|
{
|
|
case O_add:
|
|
case O_subtract:
|
|
if (unify_indexed (op) && op->X_md)
|
|
op->X_op = O_md1;
|
|
break;
|
|
case O_register:
|
|
if (op->X_md && ((REG_IX == op->X_add_number) || (REG_IY == op->X_add_number)))
|
|
{
|
|
op->X_add_symbol = zero;
|
|
op->X_op = O_md1;
|
|
}
|
|
break;
|
|
case O_constant:
|
|
/* parse SDCC syntax where index register offset placed before parentheses */
|
|
if (sdcc_compat && is_indir (res))
|
|
{
|
|
expressionS off;
|
|
off = *op;
|
|
res = parse_exp (res, op);
|
|
if (op->X_op != O_md1 || op->X_add_symbol != zero)
|
|
ill_op ();
|
|
else
|
|
op->X_add_symbol = make_expr_symbol (&off);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* Condition codes, including some synonyms provided by HiTech zas. */
|
|
static const struct reg_entry cc_tab[] =
|
|
{
|
|
{ "age", 6 << 3 },
|
|
{ "alt", 7 << 3 },
|
|
{ "c", 3 << 3 },
|
|
{ "di", 4 << 3 },
|
|
{ "ei", 5 << 3 },
|
|
{ "lge", 2 << 3 },
|
|
{ "llt", 3 << 3 },
|
|
{ "m", 7 << 3 },
|
|
{ "nc", 2 << 3 },
|
|
{ "nz", 0 << 3 },
|
|
{ "p", 6 << 3 },
|
|
{ "pe", 5 << 3 },
|
|
{ "po", 4 << 3 },
|
|
{ "z", 1 << 3 },
|
|
} ;
|
|
|
|
/* Parse condition code. */
|
|
static const char *
|
|
parse_cc (const char *s, char * op)
|
|
{
|
|
const char *p;
|
|
int i;
|
|
struct reg_entry * cc_p;
|
|
|
|
for (i = 0; i < BUFLEN; ++i)
|
|
{
|
|
if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */
|
|
break;
|
|
buf[i] = TOLOWER (s[i]);
|
|
}
|
|
|
|
if ((i < BUFLEN)
|
|
&& ((s[i] == 0) || (s[i] == ',')))
|
|
{
|
|
buf[i] = 0;
|
|
cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab),
|
|
sizeof (cc_tab[0]), key_cmp);
|
|
}
|
|
else
|
|
cc_p = NULL;
|
|
|
|
if (cc_p)
|
|
{
|
|
*op = cc_p->number;
|
|
p = s + i;
|
|
}
|
|
else
|
|
p = NULL;
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_insn (char prefix, char opcode, const char * args)
|
|
{
|
|
char *p;
|
|
|
|
if (prefix)
|
|
{
|
|
p = frag_more (2);
|
|
*p++ = prefix;
|
|
}
|
|
else
|
|
p = frag_more (1);
|
|
*p = opcode;
|
|
return args;
|
|
}
|
|
|
|
void z80_cons_fix_new (fragS *frag_p, int offset, int nbytes, expressionS *exp)
|
|
{
|
|
bfd_reloc_code_real_type r[4] =
|
|
{
|
|
BFD_RELOC_8,
|
|
BFD_RELOC_16,
|
|
BFD_RELOC_24,
|
|
BFD_RELOC_32
|
|
};
|
|
|
|
if (nbytes < 1 || nbytes > 4)
|
|
{
|
|
as_bad (_("unsupported BFD relocation size %u"), nbytes);
|
|
}
|
|
else
|
|
{
|
|
fix_new_exp (frag_p, offset, nbytes, exp, 0, r[nbytes-1]);
|
|
}
|
|
}
|
|
|
|
static void
|
|
emit_data_val (expressionS * val, int size)
|
|
{
|
|
char *p;
|
|
bfd_reloc_code_real_type r_type;
|
|
|
|
p = frag_more (size);
|
|
if (val->X_op == O_constant)
|
|
{
|
|
int i;
|
|
for (i = 0; i < size; ++i)
|
|
p[i] = (char)(val->X_add_number >> (i*8));
|
|
return;
|
|
}
|
|
|
|
switch (size)
|
|
{
|
|
case 1: r_type = BFD_RELOC_8; break;
|
|
case 2: r_type = BFD_RELOC_16; break;
|
|
case 3: r_type = BFD_RELOC_24; break;
|
|
case 4: r_type = BFD_RELOC_32; break;
|
|
case 8: r_type = BFD_RELOC_64; break;
|
|
default:
|
|
as_fatal (_("invalid data size %d"), size);
|
|
}
|
|
|
|
if ( (val->X_op == O_register)
|
|
|| (val->X_op == O_md1)
|
|
|| contains_register (val->X_add_symbol)
|
|
|| contains_register (val->X_op_symbol))
|
|
ill_op ();
|
|
|
|
if (size <= 2 && val->X_op_symbol)
|
|
{
|
|
bfd_boolean simplify = TRUE;
|
|
int shift = symbol_get_value_expression (val->X_op_symbol)->X_add_number;
|
|
if (val->X_op == O_bit_and && shift == (1 << (size*8))-1)
|
|
shift = 0;
|
|
else if (val->X_op != O_right_shift)
|
|
shift = -1;
|
|
|
|
if (size == 1)
|
|
{
|
|
switch (shift)
|
|
{
|
|
case 0: r_type = BFD_RELOC_Z80_BYTE0; break;
|
|
case 8: r_type = BFD_RELOC_Z80_BYTE1; break;
|
|
case 16: r_type = BFD_RELOC_Z80_BYTE2; break;
|
|
case 24: r_type = BFD_RELOC_Z80_BYTE3; break;
|
|
default: simplify = FALSE;
|
|
}
|
|
}
|
|
else /* if (size == 2) */
|
|
{
|
|
switch (shift)
|
|
{
|
|
case 0: r_type = BFD_RELOC_Z80_WORD0; break;
|
|
case 16: r_type = BFD_RELOC_Z80_WORD1; break;
|
|
default: simplify = FALSE;
|
|
}
|
|
}
|
|
|
|
if (simplify)
|
|
{
|
|
val->X_op = O_symbol;
|
|
val->X_op_symbol = NULL;
|
|
val->X_add_number = 0;
|
|
}
|
|
}
|
|
|
|
fix_new_exp (frag_now, p - frag_now->fr_literal, size, val, FALSE, r_type);
|
|
}
|
|
|
|
static void
|
|
emit_byte (expressionS * val, bfd_reloc_code_real_type r_type)
|
|
{
|
|
char *p;
|
|
int lo, hi;
|
|
|
|
if (r_type == BFD_RELOC_8)
|
|
{
|
|
emit_data_val (val, 1);
|
|
return;
|
|
}
|
|
p = frag_more (1);
|
|
*p = val->X_add_number;
|
|
if ( contains_register (val->X_add_symbol) || contains_register (val->X_op_symbol) )
|
|
{
|
|
ill_op ();
|
|
}
|
|
else if ((r_type == BFD_RELOC_8_PCREL) && (val->X_op == O_constant))
|
|
{
|
|
as_bad (_("cannot make a relative jump to an absolute location"));
|
|
}
|
|
else if (val->X_op == O_constant)
|
|
{
|
|
lo = -128;
|
|
hi = (BFD_RELOC_8 == r_type) ? 255 : 127;
|
|
|
|
if ((val->X_add_number < lo) || (val->X_add_number > hi))
|
|
{
|
|
if (r_type == BFD_RELOC_Z80_DISP8)
|
|
as_bad (_("offset too large"));
|
|
else
|
|
as_warn (_("overflow"));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* For symbols only, constants are stored at begin of function */
|
|
fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val,
|
|
(r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type);
|
|
}
|
|
}
|
|
|
|
static void
|
|
emit_word (expressionS * val)
|
|
{
|
|
emit_data_val (val, (inst_mode & INST_MODE_IL) ? 3 : 2);
|
|
}
|
|
|
|
static void
|
|
emit_mx (char prefix, char opcode, int shift, expressionS * arg)
|
|
/* The operand m may be r, (hl), (ix+d), (iy+d),
|
|
if 0 == prefix m may also be ixl, ixh, iyl, iyh. */
|
|
{
|
|
char *q;
|
|
int rnum;
|
|
|
|
rnum = arg->X_add_number;
|
|
switch (arg->X_op)
|
|
{
|
|
case O_register:
|
|
if (arg->X_md)
|
|
{
|
|
if (rnum != REG_HL)
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
else
|
|
rnum = 6;
|
|
}
|
|
else
|
|
{
|
|
if ((prefix == 0) && (rnum & R_INDEX))
|
|
{
|
|
prefix = (rnum & R_IX) ? 0xDD : 0xFD;
|
|
if (!(ins_ok & INS_EZ80))
|
|
check_mach (INS_IDX_HALF);
|
|
rnum &= ~R_INDEX;
|
|
}
|
|
if (rnum > 7)
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
* q ++ = prefix;
|
|
* q ++ = opcode + (rnum << shift);
|
|
break;
|
|
case O_md1:
|
|
if (ins_ok & INS_GBZ80)
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
q = frag_more (2);
|
|
*q++ = (rnum & R_IX) ? 0xDD : 0xFD;
|
|
*q = (prefix) ? prefix : (opcode + (6 << shift));
|
|
{
|
|
expressionS offset = *arg;
|
|
offset.X_op = O_symbol;
|
|
offset.X_add_number = 0;
|
|
emit_byte (&offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
if (prefix)
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode+(6<<shift);
|
|
}
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* The operand m may be r, (hl), (ix+d), (iy+d),
|
|
if 0 = prefix m may also be ixl, ixh, iyl, iyh. */
|
|
static const char *
|
|
emit_m (char prefix, char opcode, const char *args)
|
|
{
|
|
expressionS arg_m;
|
|
const char *p;
|
|
|
|
p = parse_exp (args, &arg_m);
|
|
switch (arg_m.X_op)
|
|
{
|
|
case O_md1:
|
|
case O_register:
|
|
emit_mx (prefix, opcode, 0, &arg_m);
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* The operand m may be as above or one of the undocumented
|
|
combinations (ix+d),r and (iy+d),r (if unportable instructions
|
|
are allowed). */
|
|
|
|
static const char *
|
|
emit_mr (char prefix, char opcode, const char *args)
|
|
{
|
|
expressionS arg_m, arg_r;
|
|
const char *p;
|
|
|
|
p = parse_exp (args, & arg_m);
|
|
|
|
switch (arg_m.X_op)
|
|
{
|
|
case O_md1:
|
|
if (*p == ',')
|
|
{
|
|
p = parse_exp (p + 1, & arg_r);
|
|
|
|
if ((arg_r.X_md == 0)
|
|
&& (arg_r.X_op == O_register)
|
|
&& (arg_r.X_add_number < 8))
|
|
opcode += arg_r.X_add_number - 6; /* Emit_mx () will add 6. */
|
|
else
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
check_mach (INS_ROT_II_LD);
|
|
}
|
|
/* Fall through. */
|
|
case O_register:
|
|
emit_mx (prefix, opcode, 0, & arg_m);
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static void
|
|
emit_sx (char prefix, char opcode, expressionS * arg_p)
|
|
{
|
|
char *q;
|
|
|
|
switch (arg_p->X_op)
|
|
{
|
|
case O_register:
|
|
case O_md1:
|
|
emit_mx (prefix, opcode, 0, arg_p);
|
|
break;
|
|
default:
|
|
if (arg_p->X_md)
|
|
ill_op ();
|
|
else
|
|
{
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode ^ 0x46;
|
|
emit_byte (arg_p, BFD_RELOC_8);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* The operand s may be r, (hl), (ix+d), (iy+d), n. */
|
|
static const char *
|
|
emit_s (char prefix, char opcode, const char *args)
|
|
{
|
|
expressionS arg_s;
|
|
const char *p;
|
|
|
|
p = parse_exp (args, & arg_s);
|
|
if (*p == ',' && arg_s.X_md == 0 && arg_s.X_op == O_register && arg_s.X_add_number == REG_A)
|
|
{ /* possible instruction in generic format op A,x */
|
|
if (!(ins_ok & INS_EZ80) && !sdcc_compat)
|
|
ill_op ();
|
|
++p;
|
|
p = parse_exp (p, & arg_s);
|
|
}
|
|
emit_sx (prefix, opcode, & arg_s);
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
expressionS addr;
|
|
const char *p; char *q;
|
|
|
|
p = parse_exp_not_indexed (args, &addr);
|
|
if (addr.X_md)
|
|
ill_op ();
|
|
else
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode;
|
|
emit_word (& addr);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* Operand may be rr, r, (hl), (ix+d), (iy+d). */
|
|
static const char *
|
|
emit_incdec (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS operand;
|
|
int rnum;
|
|
const char *p; char *q;
|
|
|
|
p = parse_exp (args, &operand);
|
|
rnum = operand.X_add_number;
|
|
if ((! operand.X_md)
|
|
&& (operand.X_op == O_register)
|
|
&& (R_ARITH&rnum))
|
|
{
|
|
q = frag_more ((rnum & R_INDEX) ? 2 : 1);
|
|
if (rnum & R_INDEX)
|
|
*q++ = (rnum & R_IX) ? 0xDD : 0xFD;
|
|
*q = prefix + ((rnum & 3) << 4);
|
|
}
|
|
else
|
|
{
|
|
if ((operand.X_op == O_md1) || (operand.X_op == O_register))
|
|
emit_mx (0, opcode, 3, & operand);
|
|
else
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
expressionS addr;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp_not_indexed (args, &addr);
|
|
if (addr.X_md)
|
|
ill_op ();
|
|
else
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode;
|
|
addr.X_add_number--; /* pcrel computes after offset code */
|
|
emit_byte (&addr, BFD_RELOC_8_PCREL);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_jp (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS addr;
|
|
const char *p;
|
|
char *q;
|
|
int rnum;
|
|
|
|
p = parse_exp_not_indexed (args, & addr);
|
|
if (addr.X_md)
|
|
{
|
|
rnum = addr.X_add_number;
|
|
if ((O_register == addr.X_op) && (REG_HL == (rnum & ~R_INDEX)))
|
|
{
|
|
q = frag_more ((rnum & R_INDEX) ? 2 : 1);
|
|
if (rnum & R_INDEX)
|
|
*q++ = (rnum & R_IX) ? 0xDD : 0xFD;
|
|
*q = prefix;
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
else
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode;
|
|
emit_word (& addr);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_im (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS mode;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & mode);
|
|
if (mode.X_md || (mode.X_op != O_constant))
|
|
ill_op ();
|
|
else
|
|
switch (mode.X_add_number)
|
|
{
|
|
case 1:
|
|
case 2:
|
|
++mode.X_add_number;
|
|
/* Fall through. */
|
|
case 0:
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode + 8*mode.X_add_number;
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
expressionS regp;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & regp);
|
|
if ((!regp.X_md)
|
|
&& (regp.X_op == O_register)
|
|
&& (regp.X_add_number & R_STACKABLE))
|
|
{
|
|
int rnum;
|
|
|
|
rnum = regp.X_add_number;
|
|
if (rnum&R_INDEX)
|
|
{
|
|
q = frag_more (2);
|
|
*q++ = (rnum&R_IX)?0xDD:0xFD;
|
|
}
|
|
else
|
|
q = frag_more (1);
|
|
*q = opcode + ((rnum & 3) << 4);
|
|
}
|
|
else
|
|
ill_op ();
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
char cc, *q;
|
|
const char *p;
|
|
|
|
p = parse_cc (args, &cc);
|
|
q = frag_more (1);
|
|
if (p)
|
|
*q = opcode + cc;
|
|
else
|
|
*q = prefix;
|
|
return p ? p : args;
|
|
}
|
|
|
|
static const char *
|
|
emit_adc (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS term;
|
|
int rnum;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, &term);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
if ((term.X_md) || (term.X_op != O_register))
|
|
ill_op ();
|
|
else
|
|
switch (term.X_add_number)
|
|
{
|
|
case REG_A:
|
|
p = emit_s (0, prefix, p);
|
|
break;
|
|
case REG_HL:
|
|
p = parse_exp (p, &term);
|
|
if ((!term.X_md) && (term.X_op == O_register))
|
|
{
|
|
rnum = term.X_add_number;
|
|
if (R_ARITH == (rnum & (R_ARITH | R_INDEX)))
|
|
{
|
|
q = frag_more (2);
|
|
*q++ = 0xED;
|
|
*q = opcode + ((rnum & 3) << 4);
|
|
break;
|
|
}
|
|
}
|
|
/* Fall through. */
|
|
default:
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_add (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS term;
|
|
int lhs, rhs;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, &term);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
if ((term.X_md) || (term.X_op != O_register))
|
|
ill_op ();
|
|
else
|
|
switch (term.X_add_number & ~R_INDEX)
|
|
{
|
|
case REG_A:
|
|
p = emit_s (0, prefix, p);
|
|
break;
|
|
case REG_HL:
|
|
lhs = term.X_add_number;
|
|
p = parse_exp (p, &term);
|
|
if ((!term.X_md) && (term.X_op == O_register))
|
|
{
|
|
rhs = term.X_add_number;
|
|
if ((rhs & R_ARITH)
|
|
&& ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL)))
|
|
{
|
|
q = frag_more ((lhs & R_INDEX) ? 2 : 1);
|
|
if (lhs & R_INDEX)
|
|
*q++ = (lhs & R_IX) ? 0xDD : 0xFD;
|
|
*q = opcode + ((rhs & 3) << 4);
|
|
break;
|
|
}
|
|
}
|
|
/* Fall through. */
|
|
default:
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_bit (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS b;
|
|
int bn;
|
|
const char *p;
|
|
|
|
p = parse_exp (args, &b);
|
|
if (*p++ != ',')
|
|
error (_("bad instruction syntax"));
|
|
|
|
bn = b.X_add_number;
|
|
if ((!b.X_md)
|
|
&& (b.X_op == O_constant)
|
|
&& (0 <= bn)
|
|
&& (bn < 8))
|
|
{
|
|
if (opcode == 0x40)
|
|
/* Bit : no optional third operand. */
|
|
p = emit_m (prefix, opcode + (bn << 3), p);
|
|
else
|
|
/* Set, res : resulting byte can be copied to register. */
|
|
p = emit_mr (prefix, opcode + (bn << 3), p);
|
|
}
|
|
else
|
|
ill_op ();
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_jpcc (char prefix, char opcode, const char * args)
|
|
{
|
|
char cc;
|
|
const char *p;
|
|
|
|
p = parse_cc (args, & cc);
|
|
if (p && *p++ == ',')
|
|
p = emit_call (0, opcode + cc, p);
|
|
else
|
|
p = (prefix == (char)0xC3)
|
|
? emit_jp (0xE9, prefix, args)
|
|
: emit_call (0, prefix, args);
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_jrcc (char prefix, char opcode, const char * args)
|
|
{
|
|
char cc;
|
|
const char *p;
|
|
|
|
p = parse_cc (args, &cc);
|
|
if (p && *p++ == ',')
|
|
{
|
|
if (cc > (3 << 3))
|
|
error (_("condition code invalid for jr"));
|
|
else
|
|
p = emit_jr (0, opcode + cc, p);
|
|
}
|
|
else
|
|
p = emit_jr (0, prefix, args);
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_ex (char prefix_in ATTRIBUTE_UNUSED,
|
|
char opcode_in ATTRIBUTE_UNUSED, const char * args)
|
|
{
|
|
expressionS op;
|
|
const char * p;
|
|
char prefix, opcode;
|
|
|
|
p = parse_exp_not_indexed (args, &op);
|
|
p = skip_space (p);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
prefix = opcode = 0;
|
|
if (op.X_op == O_register)
|
|
switch (op.X_add_number | (op.X_md ? 0x8000 : 0))
|
|
{
|
|
case REG_AF:
|
|
if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f')
|
|
{
|
|
/* The scrubber changes '\'' to '`' in this context. */
|
|
if (*p == '`')
|
|
++p;
|
|
opcode = 0x08;
|
|
}
|
|
break;
|
|
case REG_DE:
|
|
if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l')
|
|
opcode = 0xEB;
|
|
break;
|
|
case REG_SP|0x8000:
|
|
p = parse_exp (p, & op);
|
|
if (op.X_op == O_register
|
|
&& op.X_md == 0
|
|
&& (op.X_add_number & ~R_INDEX) == REG_HL)
|
|
{
|
|
opcode = 0xE3;
|
|
if (R_INDEX & op.X_add_number)
|
|
prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD;
|
|
}
|
|
break;
|
|
}
|
|
if (opcode)
|
|
emit_insn (prefix, opcode, p);
|
|
else
|
|
ill_op ();
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS reg, port;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, ®);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
p = parse_exp (p, &port);
|
|
if (reg.X_md == 0
|
|
&& reg.X_op == O_register
|
|
&& (reg.X_add_number <= 7 || reg.X_add_number == REG_F)
|
|
&& (port.X_md))
|
|
{
|
|
if (port.X_op != O_md1 && port.X_op != O_register)
|
|
{
|
|
if (REG_A == reg.X_add_number)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0xDB;
|
|
emit_byte (&port, BFD_RELOC_8);
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
else
|
|
{
|
|
if (port.X_add_number == REG_C || port.X_add_number == REG_BC)
|
|
{
|
|
if (port.X_add_number == REG_BC && !(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
else if (reg.X_add_number == REG_F && !(ins_ok & INS_R800))
|
|
check_mach (INS_IN_F_C);
|
|
q = frag_more (2);
|
|
*q++ = 0xED;
|
|
*q = 0x40|((reg.X_add_number&7)<<3);
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
}
|
|
else
|
|
ill_op ();
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_in0 (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS reg, port;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, ®);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
p = parse_exp (p, &port);
|
|
if (reg.X_md == 0
|
|
&& reg.X_op == O_register
|
|
&& reg.X_add_number <= 7
|
|
&& port.X_md
|
|
&& port.X_op != O_md1
|
|
&& port.X_op != O_register)
|
|
{
|
|
q = frag_more (2);
|
|
*q++ = 0xED;
|
|
*q = 0x00|(reg.X_add_number << 3);
|
|
emit_byte (&port, BFD_RELOC_8);
|
|
}
|
|
else
|
|
ill_op ();
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS reg, port;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & port);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
p = parse_exp (p, ®);
|
|
if (!port.X_md)
|
|
{ ill_op (); return p; }
|
|
/* Allow "out (c), 0" as unportable instruction. */
|
|
if (reg.X_op == O_constant && reg.X_add_number == 0)
|
|
{
|
|
check_mach (INS_OUT_C_0);
|
|
reg.X_op = O_register;
|
|
reg.X_add_number = 6;
|
|
}
|
|
if (reg.X_md
|
|
|| reg.X_op != O_register
|
|
|| reg.X_add_number > 7)
|
|
ill_op ();
|
|
else
|
|
if (port.X_op != O_register && port.X_op != O_md1)
|
|
{
|
|
if (REG_A == reg.X_add_number)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0xD3;
|
|
emit_byte (&port, BFD_RELOC_8);
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
else
|
|
{
|
|
if (REG_C == port.X_add_number || port.X_add_number == REG_BC)
|
|
{
|
|
if (port.X_add_number == REG_BC && !(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
q = frag_more (2);
|
|
*q++ = 0xED;
|
|
*q = 0x41 | (reg.X_add_number << 3);
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_out0 (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS reg, port;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & port);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
p = parse_exp (p, ®);
|
|
if (port.X_md != 0
|
|
&& port.X_op != O_register
|
|
&& port.X_op != O_md1
|
|
&& reg.X_md == 0
|
|
&& reg.X_op == O_register
|
|
&& reg.X_add_number <= 7)
|
|
{
|
|
q = frag_more (2);
|
|
*q++ = 0xED;
|
|
*q = 0x01 | (reg.X_add_number << 3);
|
|
emit_byte (&port, BFD_RELOC_8);
|
|
}
|
|
else
|
|
ill_op ();
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
expressionS addr;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp_not_indexed (args, &addr);
|
|
if (addr.X_op != O_constant)
|
|
{
|
|
error ("rst needs constant address");
|
|
return p;
|
|
}
|
|
|
|
if (addr.X_add_number & ~(7 << 3))
|
|
ill_op ();
|
|
else
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode + (addr.X_add_number & (7 << 3));
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/* For 8-bit indirect load to memory instructions like: LD (HL),n or LD (ii+d),n. */
|
|
static void
|
|
emit_ld_m_n (expressionS *dst, expressionS *src)
|
|
{
|
|
char *q;
|
|
char prefix;
|
|
expressionS dst_offset;
|
|
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_HL: prefix = 0x00; break;
|
|
case REG_IX: prefix = 0xDD; break;
|
|
case REG_IY: prefix = 0xFD; break;
|
|
default:
|
|
ill_op ();
|
|
return;
|
|
}
|
|
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = 0x36;
|
|
if (prefix)
|
|
{
|
|
dst_offset = *dst;
|
|
dst_offset.X_op = O_symbol;
|
|
dst_offset.X_add_number = 0;
|
|
emit_byte (& dst_offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
emit_byte (src, BFD_RELOC_8);
|
|
}
|
|
|
|
/* For 8-bit load register to memory instructions: LD (<expression>),r. */
|
|
static void
|
|
emit_ld_m_r (expressionS *dst, expressionS *src)
|
|
{
|
|
char *q;
|
|
char prefix = 0;
|
|
expressionS dst_offset;
|
|
|
|
switch (dst->X_op)
|
|
{
|
|
case O_md1:
|
|
prefix = (dst->X_add_number == REG_IX) ? 0xDD : 0xFD;
|
|
/* Fall through. */
|
|
case O_register:
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_BC: /* LD (BC),A */
|
|
case REG_DE: /* LD (DE),A */
|
|
if (src->X_add_number == REG_A)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0x02 | ((dst->X_add_number & 3) << 4);
|
|
return;
|
|
}
|
|
break;
|
|
case REG_IX:
|
|
case REG_IY:
|
|
case REG_HL: /* LD (HL),r or LD (ii+d),r */
|
|
if (src->X_add_number <= 7)
|
|
{
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = 0x70 | src->X_add_number;
|
|
if (prefix)
|
|
{
|
|
dst_offset = *dst;
|
|
dst_offset.X_op = O_symbol;
|
|
dst_offset.X_add_number = 0;
|
|
emit_byte (& dst_offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
return;
|
|
}
|
|
break;
|
|
default:;
|
|
}
|
|
break;
|
|
default: /* LD (nn),A */
|
|
if (src->X_add_number == REG_A)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0x32;
|
|
emit_word (dst);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
ill_op ();
|
|
}
|
|
|
|
/* For 16-bit load register to memory instructions: LD (<expression>),rr. */
|
|
static void
|
|
emit_ld_m_rr (expressionS *dst, expressionS *src)
|
|
{
|
|
char *q;
|
|
int prefix = 0;
|
|
int opcode = 0;
|
|
expressionS dst_offset;
|
|
|
|
switch (dst->X_op)
|
|
{
|
|
case O_md1: /* eZ80 instructions LD (ii+d),rr */
|
|
case O_register: /* eZ80 instructions LD (HL),rr */
|
|
if (!(ins_ok & INS_EZ80)) /* 16-bit indirect load group is supported by eZ80 only */
|
|
ill_op ();
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_IX: prefix = 0xDD; break;
|
|
case REG_IY: prefix = 0xFD; break;
|
|
case REG_HL: prefix = 0xED; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_BC: opcode = 0x0F; break;
|
|
case REG_DE: opcode = 0x1F; break;
|
|
case REG_HL: opcode = 0x2F; break;
|
|
case REG_IX: opcode = (prefix != 0xFD) ? 0x3F : 0x3E; break;
|
|
case REG_IY: opcode = (prefix != 0xFD) ? 0x3E : 0x3F; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
if (prefix == 0xFD || prefix == 0xDD)
|
|
{
|
|
dst_offset = *dst;
|
|
dst_offset.X_op = O_symbol;
|
|
dst_offset.X_add_number = 0;
|
|
emit_byte (& dst_offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
break;
|
|
default: /* LD (nn),rr */
|
|
if (ins_ok & INS_GBZ80)
|
|
{
|
|
/* GBZ80 supports only LD (nn),SP */
|
|
if (src->X_add_number == REG_SP)
|
|
{
|
|
prefix = 0x00;
|
|
opcode = 0x08;
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
else
|
|
{
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_BC: prefix = 0xED; opcode = 0x43; break;
|
|
case REG_DE: prefix = 0xED; opcode = 0x53; break;
|
|
case REG_HL: prefix = 0x00; opcode = 0x22; break;
|
|
case REG_IX: prefix = 0xDD; opcode = 0x22; break;
|
|
case REG_IY: prefix = 0xFD; opcode = 0x22; break;
|
|
case REG_SP: prefix = 0xED; opcode = 0x73; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
emit_word (dst);
|
|
}
|
|
}
|
|
|
|
static void
|
|
emit_ld_r_m (expressionS *dst, expressionS *src)
|
|
{ /* for 8-bit memory load to register: LD r,(xxx) */
|
|
char *q;
|
|
char prefix = 0;
|
|
char opcode = 0;
|
|
expressionS src_offset;
|
|
|
|
if (dst->X_add_number == REG_A && src->X_op == O_register)
|
|
{ /* LD A,(BC) or LD A,(DE) */
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_BC: opcode = 0x0A; break;
|
|
case REG_DE: opcode = 0x1A; break;
|
|
default: break;
|
|
}
|
|
if (opcode != 0)
|
|
{
|
|
q = frag_more (1);
|
|
*q = opcode;
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (src->X_op)
|
|
{
|
|
case O_md1:
|
|
case O_register:
|
|
if (dst->X_add_number > 7)
|
|
ill_op ();
|
|
opcode = 0x46; /* LD B,(HL) */
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_HL: prefix = 0x00; break;
|
|
case REG_IX: prefix = 0xDD; break;
|
|
case REG_IY: prefix = 0xFD; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode | ((dst->X_add_number & 7) << 3);
|
|
if (prefix)
|
|
{
|
|
src_offset = *src;
|
|
src_offset.X_op = O_symbol;
|
|
src_offset.X_add_number = 0;
|
|
emit_byte (& src_offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
break;
|
|
default: /* LD A,(nn) */
|
|
if (dst->X_add_number == REG_A)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0x3A;
|
|
emit_word (src);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
emit_ld_r_n (expressionS *dst, expressionS *src)
|
|
{ /* for 8-bit immediate value load to register: LD r,n */
|
|
char *q;
|
|
char prefix = 0;
|
|
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_H|R_IX:
|
|
case REG_L|R_IX:
|
|
prefix = 0xDD;
|
|
break;
|
|
case REG_H|R_IY:
|
|
case REG_L|R_IY:
|
|
prefix = 0xFD;
|
|
break;
|
|
case REG_A:
|
|
case REG_B:
|
|
case REG_C:
|
|
case REG_D:
|
|
case REG_E:
|
|
case REG_H:
|
|
case REG_L:
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
// return;
|
|
}
|
|
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
{
|
|
if (ins_ok & INS_GBZ80)
|
|
ill_op ();
|
|
else if (!(ins_ok & INS_EZ80))
|
|
check_mach (INS_IDX_HALF);
|
|
*q++ = prefix;
|
|
}
|
|
*q = 0x06 | ((dst->X_add_number & 7) << 3);
|
|
emit_byte (src, BFD_RELOC_8);
|
|
}
|
|
|
|
static void
|
|
emit_ld_r_r (expressionS *dst, expressionS *src)
|
|
{ /* mostly 8-bit load register from register instructions: LD r,r */
|
|
/* there are some exceptions: LD SP,HL/IX/IY; LD I,HL and LD HL,I */
|
|
char *q;
|
|
int prefix = 0;
|
|
int opcode = 0;
|
|
int ii_halves = 0;
|
|
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_SP:
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_HL: prefix = 0x00; break;
|
|
case REG_IX: prefix = 0xDD; break;
|
|
case REG_IY: prefix = 0xFD; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
if (ins_ok & INS_GBZ80)
|
|
ill_op ();
|
|
opcode = 0xF9;
|
|
break;
|
|
case REG_HL:
|
|
if (!(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
if (src->X_add_number != REG_I)
|
|
ill_op ();
|
|
if (cpu_mode < 1)
|
|
error (_("ADL mode instruction"));
|
|
/* LD HL,I */
|
|
prefix = 0xED;
|
|
opcode = 0xD7;
|
|
break;
|
|
case REG_I:
|
|
if (src->X_add_number == REG_HL)
|
|
{
|
|
if (!(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
if (cpu_mode < 1)
|
|
error (_("ADL mode instruction"));
|
|
prefix = 0xED;
|
|
opcode = 0xC7;
|
|
}
|
|
else if (src->X_add_number == REG_A)
|
|
{
|
|
prefix = 0xED;
|
|
opcode = 0x47;
|
|
}
|
|
else
|
|
ill_op ();
|
|
break;
|
|
case REG_MB:
|
|
if (!(ins_ok & INS_EZ80) || (src->X_add_number != REG_A))
|
|
ill_op ();
|
|
if (cpu_mode < 1)
|
|
error (_("ADL mode instruction"));
|
|
prefix = 0xED;
|
|
opcode = 0x6D;
|
|
break;
|
|
case REG_R:
|
|
if (src->X_add_number == REG_A) /* LD R,A */
|
|
{
|
|
prefix = 0xED;
|
|
opcode = 0x4F;
|
|
}
|
|
else
|
|
ill_op ();
|
|
break;
|
|
case REG_A:
|
|
if (src->X_add_number == REG_I) /* LD A,I */
|
|
{
|
|
prefix = 0xED;
|
|
opcode = 0x57;
|
|
break;
|
|
}
|
|
else if (src->X_add_number == REG_R) /* LD A,R */
|
|
{
|
|
prefix = 0xED;
|
|
opcode = 0x5F;
|
|
break;
|
|
}
|
|
else if (src->X_add_number == REG_MB) /* LD A,MB */
|
|
{
|
|
if (!(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
else
|
|
{
|
|
if (cpu_mode < 1)
|
|
error (_("ADL mode instruction"));
|
|
prefix = 0xED;
|
|
opcode = 0x6E;
|
|
}
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
case REG_B:
|
|
case REG_C:
|
|
case REG_D:
|
|
case REG_E:
|
|
case REG_H:
|
|
case REG_L:
|
|
prefix = 0x00;
|
|
break;
|
|
case REG_H|R_IX:
|
|
case REG_L|R_IX:
|
|
prefix = 0xDD;
|
|
ii_halves = 1;
|
|
break;
|
|
case REG_H|R_IY:
|
|
case REG_L|R_IY:
|
|
prefix = 0xFD;
|
|
ii_halves = 1;
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
|
|
if (opcode == 0)
|
|
{
|
|
switch (src->X_add_number)
|
|
{
|
|
case REG_A:
|
|
case REG_B:
|
|
case REG_C:
|
|
case REG_D:
|
|
case REG_E:
|
|
break;
|
|
case REG_H:
|
|
case REG_L:
|
|
if (prefix != 0)
|
|
ill_op (); /* LD iiH/L,H/L are not permitted */
|
|
break;
|
|
case REG_H|R_IX:
|
|
case REG_L|R_IX:
|
|
if (prefix == 0xFD || dst->X_add_number == REG_H || dst->X_add_number == REG_L)
|
|
ill_op (); /* LD IYL,IXL and LD H,IXH are not permitted */
|
|
prefix = 0xDD;
|
|
ii_halves = 1;
|
|
break;
|
|
case REG_H|R_IY:
|
|
case REG_L|R_IY:
|
|
if (prefix == 0xDD || dst->X_add_number == REG_H || dst->X_add_number == REG_L)
|
|
ill_op (); /* LD IXH,IYH and LD L,IYL are not permitted */
|
|
prefix = 0xFD;
|
|
ii_halves = 1;
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
opcode = 0x40 + ((dst->X_add_number & 7) << 3) + (src->X_add_number & 7);
|
|
}
|
|
if ((ins_ok & INS_GBZ80) && prefix != 0)
|
|
ill_op ();
|
|
if (ii_halves && !(ins_ok & INS_EZ80))
|
|
check_mach (INS_IDX_HALF);
|
|
if (prefix == 0 && (ins_ok & INS_EZ80))
|
|
{
|
|
switch (opcode)
|
|
{
|
|
case 0x40: /* SIS prefix, in Z80 it is LD B,B */
|
|
case 0x49: /* LIS prefix, in Z80 it is LD C,C */
|
|
case 0x52: /* SIL prefix, in Z80 it is LD D,D */
|
|
case 0x5B: /* LIL prefix, in Z80 it is LD E,E */
|
|
as_warn (_("unsupported instruction, assembled as NOP"));
|
|
opcode = 0x00;
|
|
break;
|
|
default:;
|
|
}
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
}
|
|
|
|
static void
|
|
emit_ld_rr_m (expressionS *dst, expressionS *src)
|
|
{ /* for 16-bit indirect load from memory to register: LD rr,(xxx) */
|
|
char *q;
|
|
int prefix = 0;
|
|
int opcode = 0;
|
|
expressionS src_offset;
|
|
|
|
/* GBZ80 has no support for 16-bit load from memory instructions */
|
|
if (ins_ok & INS_GBZ80)
|
|
ill_op ();
|
|
|
|
prefix = 0xED;
|
|
switch (src->X_op)
|
|
{
|
|
case O_md1: /* LD rr,(ii+d) */
|
|
prefix = (src->X_add_number == REG_IX) ? 0xDD : 0xFD;
|
|
/* Fall through. */
|
|
case O_register: /* LD rr,(HL) */
|
|
/* currently only EZ80 has support for 16bit indirect memory load instructions */
|
|
if (!(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_BC: opcode = 0x07; break;
|
|
case REG_DE: opcode = 0x17; break;
|
|
case REG_HL: opcode = 0x27; break;
|
|
case REG_IX: opcode = (!prefix || prefix == 0xDD) ? 0x37 : 0x31; break;
|
|
case REG_IY: opcode = prefix ? ((prefix == 0xDD) ? 0x31 : 0x37) : 0x36; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
if (prefix != 0xED)
|
|
{
|
|
src_offset = *src;
|
|
src_offset.X_op = O_symbol;
|
|
src_offset.X_add_number = 0;
|
|
emit_byte (& src_offset, BFD_RELOC_Z80_DISP8);
|
|
}
|
|
break;
|
|
default: /* LD rr,(nn) */
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_BC: prefix = 0xED; opcode = 0x4B; break;
|
|
case REG_DE: prefix = 0xED; opcode = 0x5B; break;
|
|
case REG_HL: prefix = 0x00; opcode = 0x2A; break;
|
|
case REG_SP: prefix = 0xED; opcode = 0x7B; break;
|
|
case REG_IX: prefix = 0xDD; opcode = 0x2A; break;
|
|
case REG_IY: prefix = 0xFD; opcode = 0x2A; break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
emit_word (src);
|
|
}
|
|
return;
|
|
}
|
|
|
|
static void
|
|
emit_ld_rr_nn (expressionS *dst, expressionS *src)
|
|
{ /* mostly load imediate value to multibyte register instructions: LD rr,nn */
|
|
char *q;
|
|
int prefix = 0x00;
|
|
int opcode = 0x21; /* LD HL,nn */
|
|
switch (dst->X_add_number)
|
|
{
|
|
case REG_IX:
|
|
prefix = 0xDD;
|
|
break;
|
|
case REG_IY:
|
|
prefix = 0xFD;
|
|
break;
|
|
case REG_HL:
|
|
break;
|
|
case REG_BC:
|
|
case REG_DE:
|
|
case REG_SP:
|
|
opcode = 0x01 + ((dst->X_add_number & 3) << 4);
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
return;
|
|
}
|
|
if (prefix && (ins_ok & INS_GBZ80))
|
|
ill_op ();
|
|
q = frag_more (prefix ? 2 : 1);
|
|
if (prefix)
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
emit_word (src);
|
|
}
|
|
|
|
static const char *
|
|
emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS dst, src;
|
|
const char *p;
|
|
|
|
p = parse_exp (args, & dst);
|
|
if (*p++ != ',')
|
|
error (_("bad instruction syntax"));
|
|
p = parse_exp (p, & src);
|
|
|
|
if (dst.X_md)
|
|
{
|
|
if (src.X_op == O_register)
|
|
{
|
|
if (src.X_add_number <= 7)
|
|
emit_ld_m_r (& dst, & src); /* LD (xxx),r */
|
|
else
|
|
emit_ld_m_rr (& dst, & src); /* LD (xxx),rr */
|
|
}
|
|
else
|
|
emit_ld_m_n (& dst, & src); /* LD (hl),n or LD (ix/y+r),n */
|
|
}
|
|
else if (dst.X_op == O_register)
|
|
{
|
|
if (src.X_md)
|
|
{
|
|
if (dst.X_add_number <= 7)
|
|
emit_ld_r_m (& dst, & src);
|
|
else
|
|
emit_ld_rr_m (& dst, & src);
|
|
}
|
|
else if (src.X_op == O_register)
|
|
emit_ld_r_r (& dst, & src);
|
|
else if ((dst.X_add_number & ~R_INDEX) <= 7)
|
|
emit_ld_r_n (& dst, & src);
|
|
else
|
|
emit_ld_rr_nn (& dst, & src);
|
|
}
|
|
else
|
|
ill_op ();
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_lddldi (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS dst, src;
|
|
const char *p;
|
|
char *q;
|
|
|
|
if (!(ins_ok & INS_GBZ80))
|
|
return emit_insn (prefix, opcode, args);
|
|
|
|
p = parse_exp (args, & dst);
|
|
if (*p++ != ',')
|
|
error (_("bad instruction syntax"));
|
|
p = parse_exp (args, & src);
|
|
|
|
if (dst.X_op != O_register || src.X_op != O_register)
|
|
ill_op ();
|
|
|
|
/* convert opcode 0xA0 . 0x22, 0xA8 . 0x32 */
|
|
opcode = (opcode & 0x08) * 2 + 0x22;
|
|
|
|
if (dst.X_md != 0
|
|
&& dst.X_add_number == REG_HL
|
|
&& src.X_md == 0
|
|
&& src.X_add_number == REG_A)
|
|
opcode |= 0x00; /* LDx (HL),A */
|
|
else if (dst.X_md == 0
|
|
&& dst.X_add_number == REG_A
|
|
&& src.X_md != 0
|
|
&& src.X_add_number == REG_HL)
|
|
opcode |= 0x08; /* LDx A,(HL) */
|
|
else
|
|
ill_op ();
|
|
|
|
q = frag_more (1);
|
|
*q = opcode;
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_ldh (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED,
|
|
const char * args)
|
|
{
|
|
expressionS dst, src;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & dst);
|
|
if (*p++ != ',')
|
|
{
|
|
error (_("bad instruction syntax"));
|
|
return p;
|
|
}
|
|
|
|
p = parse_exp (p, & src);
|
|
if (dst.X_md == 0
|
|
&& dst.X_op == O_register
|
|
&& dst.X_add_number == REG_A
|
|
&& src.X_md != 0
|
|
&& src.X_op != O_md1
|
|
&& src.X_op != O_register)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0xF0;
|
|
emit_byte (& src, BFD_RELOC_8);
|
|
}
|
|
else if (dst.X_md != 0
|
|
&& dst.X_op != O_md1
|
|
&& src.X_md == 0
|
|
&& src.X_op == O_register
|
|
&& src.X_add_number == REG_A)
|
|
{
|
|
if (dst.X_op == O_register)
|
|
{
|
|
if (dst.X_add_number == REG_C)
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0xE2;
|
|
}
|
|
else
|
|
ill_op ();
|
|
}
|
|
else
|
|
{
|
|
q = frag_more (1);
|
|
*q = 0xE0;
|
|
emit_byte (& dst, BFD_RELOC_8);
|
|
}
|
|
}
|
|
else
|
|
ill_op ();
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
parse_lea_pea_args (const char * args, expressionS *op)
|
|
{
|
|
const char *p;
|
|
p = parse_exp (args, op);
|
|
if (sdcc_compat && *p == ',' && op->X_op == O_register)
|
|
{
|
|
expressionS off;
|
|
p = parse_exp (p + 1, &off);
|
|
op->X_op = O_add;
|
|
op->X_add_symbol = make_expr_symbol (&off);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_lea (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS dst, src;
|
|
const char *p;
|
|
char *q;
|
|
int rnum;
|
|
|
|
p = parse_exp (args, & dst);
|
|
if (dst.X_md != 0 || dst.X_op != O_register)
|
|
ill_op ();
|
|
|
|
rnum = dst.X_add_number;
|
|
switch (rnum)
|
|
{
|
|
case REG_BC:
|
|
case REG_DE:
|
|
case REG_HL:
|
|
opcode = 0x02 | ((rnum & 0x03) << 4);
|
|
break;
|
|
case REG_IX:
|
|
opcode = 0x32; /* lea ix,ix+d has opcode 0x32; lea ix,iy+d has opcode 0x54 */
|
|
break;
|
|
case REG_IY:
|
|
opcode = 0x33; /* lea iy,iy+d has opcode 0x33; lea iy,ix+d has opcode 0x55 */
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
|
|
if (*p++ != ',')
|
|
error (_("bad instruction syntax"));
|
|
|
|
p = parse_lea_pea_args (p, & src);
|
|
if (src.X_md != 0 || src.X_op != O_add /*&& src.X_op != O_register*/)
|
|
ill_op ();
|
|
|
|
rnum = src.X_add_number;
|
|
switch (src.X_op)
|
|
{
|
|
case O_add:
|
|
break;
|
|
case O_register: /* permit instructions like LEA rr,IX without displacement specified */
|
|
src.X_add_symbol = zero;
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
|
|
switch (rnum)
|
|
{
|
|
case REG_IX:
|
|
opcode = (opcode == (char)0x33) ? 0x55 : (opcode|0x00);
|
|
break;
|
|
case REG_IY:
|
|
opcode = (opcode == (char)0x32) ? 0x54 : (opcode|0x01);
|
|
}
|
|
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
|
|
src.X_op = O_symbol;
|
|
src.X_add_number = 0;
|
|
emit_byte (& src, BFD_RELOC_Z80_DISP8);
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_mlt (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS arg;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & arg);
|
|
if (arg.X_md != 0 || arg.X_op != O_register || !(arg.X_add_number & R_ARITH))
|
|
ill_op ();
|
|
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode | ((arg.X_add_number & 3) << 4);
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_pea (char prefix, char opcode, const char * args)
|
|
{
|
|
expressionS arg;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_lea_pea_args (args, & arg);
|
|
if (arg.X_md != 0
|
|
|| (/*arg.X_op != O_register &&*/ arg.X_op != O_add)
|
|
|| !(arg.X_add_number & R_INDEX))
|
|
ill_op ();
|
|
/* PEA ii without displacement is mostly typo,
|
|
because there is PUSH instruction which is shorter and faster */
|
|
/*if (arg.X_op == O_register)
|
|
as_warn (_("PEA is used without displacement, use PUSH instead"));*/
|
|
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode + (arg.X_add_number == REG_IY ? 1 : 0);
|
|
|
|
arg.X_op = O_symbol;
|
|
arg.X_add_number = 0;
|
|
emit_byte (& arg, BFD_RELOC_Z80_DISP8);
|
|
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_reti (char prefix, char opcode, const char * args)
|
|
{
|
|
if (ins_ok & INS_GBZ80)
|
|
return emit_insn (0x00, 0xD9, args);
|
|
|
|
return emit_insn (prefix, opcode, args);
|
|
}
|
|
|
|
static const char *
|
|
emit_tst (char prefix, char opcode, const char *args)
|
|
{
|
|
expressionS arg_s;
|
|
const char *p;
|
|
char *q;
|
|
int rnum;
|
|
|
|
p = parse_exp (args, & arg_s);
|
|
if (*p == ',' && arg_s.X_md == 0 && arg_s.X_op == O_register && arg_s.X_add_number == REG_A)
|
|
{
|
|
if (!(ins_ok & INS_EZ80))
|
|
ill_op ();
|
|
++p;
|
|
p = parse_exp (p, & arg_s);
|
|
}
|
|
|
|
rnum = arg_s.X_add_number;
|
|
switch (arg_s.X_op)
|
|
{
|
|
case O_md1:
|
|
ill_op ();
|
|
break;
|
|
case O_register:
|
|
rnum = arg_s.X_add_number;
|
|
if (arg_s.X_md != 0)
|
|
{
|
|
if (rnum != REG_HL)
|
|
ill_op ();
|
|
else
|
|
rnum = 6;
|
|
}
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode | (rnum << 3);
|
|
break;
|
|
default:
|
|
if (arg_s.X_md)
|
|
ill_op ();
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode | 0x60;
|
|
emit_byte (& arg_s, BFD_RELOC_8);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_tstio (char prefix, char opcode, const char *args)
|
|
{
|
|
expressionS arg;
|
|
const char *p;
|
|
char *q;
|
|
|
|
p = parse_exp (args, & arg);
|
|
if (arg.X_md || arg.X_op == O_register || arg.X_op == O_md1)
|
|
ill_op ();
|
|
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode;
|
|
emit_byte (& arg, BFD_RELOC_8);
|
|
|
|
return p;
|
|
}
|
|
|
|
static void
|
|
emit_data (int size ATTRIBUTE_UNUSED)
|
|
{
|
|
const char *p, *q;
|
|
char *u, quote;
|
|
int cnt;
|
|
expressionS exp;
|
|
|
|
if (is_it_end_of_statement ())
|
|
{
|
|
demand_empty_rest_of_line ();
|
|
return;
|
|
}
|
|
p = skip_space (input_line_pointer);
|
|
|
|
do
|
|
{
|
|
if (*p == '\"' || *p == '\'')
|
|
{
|
|
for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt)
|
|
;
|
|
u = frag_more (cnt);
|
|
memcpy (u, q, cnt);
|
|
if (!*p)
|
|
as_warn (_("unterminated string"));
|
|
else
|
|
p = skip_space (p+1);
|
|
}
|
|
else
|
|
{
|
|
p = parse_exp (p, &exp);
|
|
if (exp.X_op == O_md1 || exp.X_op == O_register)
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
if (exp.X_md)
|
|
as_warn (_("parentheses ignored"));
|
|
emit_byte (&exp, BFD_RELOC_8);
|
|
p = skip_space (p);
|
|
}
|
|
}
|
|
while (*p++ == ',') ;
|
|
input_line_pointer = (char *)(p-1);
|
|
}
|
|
|
|
static void
|
|
z80_cons (int size)
|
|
{
|
|
const char *p;
|
|
expressionS exp;
|
|
|
|
if (is_it_end_of_statement ())
|
|
{
|
|
demand_empty_rest_of_line ();
|
|
return;
|
|
}
|
|
p = skip_space (input_line_pointer);
|
|
|
|
do
|
|
{
|
|
p = parse_exp (p, &exp);
|
|
if (exp.X_op == O_md1 || exp.X_op == O_register)
|
|
{
|
|
ill_op ();
|
|
break;
|
|
}
|
|
if (exp.X_md)
|
|
as_warn (_("parentheses ignored"));
|
|
emit_data_val (&exp, size);
|
|
p = skip_space (p);
|
|
} while (*p++ == ',') ;
|
|
input_line_pointer = (char *)(p-1);
|
|
}
|
|
|
|
/* next functions were commented out because it is difficult to mix
|
|
both ADL and Z80 mode instructions within one COFF file:
|
|
objdump cannot recognize point of mode switching.
|
|
*/
|
|
static void
|
|
set_cpu_mode (int mode)
|
|
{
|
|
if (ins_ok & INS_EZ80)
|
|
cpu_mode = mode;
|
|
else
|
|
error (_("CPU mode is unsupported by target"));
|
|
}
|
|
|
|
static void
|
|
assume (int arg ATTRIBUTE_UNUSED)
|
|
{
|
|
char *name;
|
|
char c;
|
|
int n;
|
|
|
|
input_line_pointer = (char*)skip_space (input_line_pointer);
|
|
c = get_symbol_name (& name);
|
|
if (strncasecmp (name, "ADL", 4) != 0)
|
|
{
|
|
ill_op ();
|
|
return;
|
|
}
|
|
|
|
restore_line_pointer (c);
|
|
input_line_pointer = (char*)skip_space (input_line_pointer);
|
|
if (*input_line_pointer++ != '=')
|
|
{
|
|
error (_("assignment expected"));
|
|
return;
|
|
}
|
|
input_line_pointer = (char*)skip_space (input_line_pointer);
|
|
n = get_single_number ();
|
|
|
|
set_cpu_mode (n);
|
|
}
|
|
|
|
static const char *
|
|
emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
const char *p;
|
|
|
|
p = skip_space (args);
|
|
if (TOLOWER (*p++) != 'a' || *p++ != ',')
|
|
ill_op ();
|
|
else
|
|
{
|
|
char *q, reg;
|
|
|
|
reg = TOLOWER (*p++);
|
|
switch (reg)
|
|
{
|
|
case 'b':
|
|
case 'c':
|
|
case 'd':
|
|
case 'e':
|
|
check_mach (INS_R800);
|
|
if (!*skip_space (p))
|
|
{
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode + ((reg - 'b') << 3);
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
default:
|
|
ill_op ();
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static const char *
|
|
emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args)
|
|
{
|
|
const char *p;
|
|
|
|
p = skip_space (args);
|
|
if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',')
|
|
ill_op ();
|
|
else
|
|
{
|
|
expressionS reg;
|
|
char *q;
|
|
|
|
p = parse_exp (p, & reg);
|
|
|
|
if ((!reg.X_md) && reg.X_op == O_register)
|
|
switch (reg.X_add_number)
|
|
{
|
|
case REG_BC:
|
|
case REG_SP:
|
|
check_mach (INS_R800);
|
|
q = frag_more (2);
|
|
*q++ = prefix;
|
|
*q = opcode + ((reg.X_add_number & 3) << 4);
|
|
break;
|
|
default:
|
|
ill_op ();
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static int
|
|
assemble_suffix (const char **suffix)
|
|
{
|
|
static
|
|
const char sf[8][4] =
|
|
{
|
|
"il",
|
|
"is",
|
|
"l",
|
|
"lil",
|
|
"lis",
|
|
"s",
|
|
"sil",
|
|
"sis"
|
|
};
|
|
const char *p;
|
|
const char (*t)[4];
|
|
char sbuf[4];
|
|
int i;
|
|
|
|
p = *suffix;
|
|
if (*p++ != '.')
|
|
return 0;
|
|
|
|
for (i = 0; (i < 3) && (ISALPHA (*p)); i++)
|
|
sbuf[i] = TOLOWER (*p++);
|
|
if (*p && !ISSPACE (*p))
|
|
return 0;
|
|
*suffix = p;
|
|
sbuf[i] = 0;
|
|
|
|
t = bsearch (sbuf, sf, ARRAY_SIZE (sf), sizeof (sf[0]), (int(*)(const void*, const void*)) strcmp);
|
|
if (t == NULL)
|
|
return 0;
|
|
i = t - sf;
|
|
switch (i)
|
|
{
|
|
case 0: /* IL */
|
|
i = cpu_mode ? 0x5B : 0x52;
|
|
break;
|
|
case 1: /* IS */
|
|
i = cpu_mode ? 0x49 : 0x40;
|
|
break;
|
|
case 2: /* L */
|
|
i = cpu_mode ? 0x5B : 0x49;
|
|
break;
|
|
case 3: /* LIL */
|
|
i = 0x5B;
|
|
break;
|
|
case 4: /* LIS */
|
|
i = 0x49;
|
|
break;
|
|
case 5: /* S */
|
|
i = cpu_mode ? 0x52 : 0x40;
|
|
break;
|
|
case 6: /* SIL */
|
|
i = 0x52;
|
|
break;
|
|
case 7: /* SIS */
|
|
i = 0x40;
|
|
break;
|
|
}
|
|
*frag_more (1) = (char)i;
|
|
switch (i)
|
|
{
|
|
case 0x40: inst_mode = INST_MODE_FORCED | INST_MODE_S | INST_MODE_IS; break;
|
|
case 0x49: inst_mode = INST_MODE_FORCED | INST_MODE_L | INST_MODE_IS; break;
|
|
case 0x52: inst_mode = INST_MODE_FORCED | INST_MODE_S | INST_MODE_IL; break;
|
|
case 0x5B: inst_mode = INST_MODE_FORCED | INST_MODE_L | INST_MODE_IL; break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
psect (int arg)
|
|
{
|
|
#if defined(OBJ_ELF)
|
|
return obj_elf_section (arg);
|
|
#elif defined(OBJ_COFF)
|
|
return obj_coff_section (arg);
|
|
#else
|
|
#error Unknown object format
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
set_inss (int inss)
|
|
{
|
|
int old_ins;
|
|
|
|
if (!sdcc_compat)
|
|
as_fatal (_("Invalid directive"));
|
|
|
|
old_ins = ins_ok;
|
|
ins_ok &= INS_MARCH_MASK;
|
|
ins_ok |= inss;
|
|
if (old_ins != ins_ok)
|
|
cpu_mode = 0;
|
|
}
|
|
|
|
static void
|
|
ignore (int arg ATTRIBUTE_UNUSED)
|
|
{
|
|
ignore_rest_of_line ();
|
|
}
|
|
|
|
static void
|
|
area (int arg)
|
|
{
|
|
char *p;
|
|
if (!sdcc_compat)
|
|
as_fatal (_("Invalid directive"));
|
|
for (p = input_line_pointer; *p && *p != '(' && *p != '\n'; p++)
|
|
;
|
|
if (*p == '(')
|
|
{
|
|
*p = '\n';
|
|
psect (arg);
|
|
*p++ = '(';
|
|
ignore_rest_of_line ();
|
|
}
|
|
else
|
|
psect (arg);
|
|
}
|
|
|
|
/* Port specific pseudo ops. */
|
|
const pseudo_typeS md_pseudo_table[] =
|
|
{
|
|
{ ".area", area, 0},
|
|
{ ".assume", assume, 0},
|
|
{ ".ez80", set_inss, INS_EZ80},
|
|
{ ".gbz80", set_inss, INS_GBZ80},
|
|
{ ".module", ignore, 0},
|
|
{ ".optsdcc", ignore, 0},
|
|
{ ".r800", set_inss, INS_R800},
|
|
{ ".set", s_set, 0},
|
|
{ ".z180", set_inss, INS_Z180},
|
|
{ ".z80", set_inss, INS_Z80},
|
|
{ "db" , emit_data, 1},
|
|
{ "d24", z80_cons, 3},
|
|
{ "d32", z80_cons, 4},
|
|
{ "def24", z80_cons, 3},
|
|
{ "def32", z80_cons, 4},
|
|
{ "defb", emit_data, 1},
|
|
{ "defm", emit_data, 1},
|
|
{ "defs", s_space, 1}, /* Synonym for ds on some assemblers. */
|
|
{ "defw", z80_cons, 2},
|
|
{ "ds", s_space, 1}, /* Fill with bytes rather than words. */
|
|
{ "dw", z80_cons, 2},
|
|
{ "psect", psect, 0}, /* TODO: Translate attributes. */
|
|
{ "set", 0, 0}, /* Real instruction on z80. */
|
|
{ NULL, 0, 0 }
|
|
} ;
|
|
|
|
static table_t instab[] =
|
|
{
|
|
{ "adc", 0x88, 0x4A, emit_adc, INS_ALL },
|
|
{ "add", 0x80, 0x09, emit_add, INS_ALL },
|
|
{ "and", 0x00, 0xA0, emit_s, INS_ALL },
|
|
{ "bit", 0xCB, 0x40, emit_bit, INS_ALL },
|
|
{ "call", 0xCD, 0xC4, emit_jpcc, INS_ALL },
|
|
{ "ccf", 0x00, 0x3F, emit_insn, INS_ALL },
|
|
{ "cp", 0x00, 0xB8, emit_s, INS_ALL },
|
|
{ "cpd", 0xED, 0xA9, emit_insn, INS_NOT_GBZ80 },
|
|
{ "cpdr", 0xED, 0xB9, emit_insn, INS_NOT_GBZ80 },
|
|
{ "cpi", 0xED, 0xA1, emit_insn, INS_NOT_GBZ80 },
|
|
{ "cpir", 0xED, 0xB1, emit_insn, INS_NOT_GBZ80 },
|
|
{ "cpl", 0x00, 0x2F, emit_insn, INS_ALL },
|
|
{ "daa", 0x00, 0x27, emit_insn, INS_ALL },
|
|
{ "dec", 0x0B, 0x05, emit_incdec,INS_ALL },
|
|
{ "di", 0x00, 0xF3, emit_insn, INS_ALL },
|
|
{ "djnz", 0x00, 0x10, emit_jr, INS_NOT_GBZ80 },
|
|
{ "ei", 0x00, 0xFB, emit_insn, INS_ALL },
|
|
{ "ex", 0x00, 0x00, emit_ex, INS_NOT_GBZ80 },
|
|
{ "exx", 0x00, 0xD9, emit_insn, INS_NOT_GBZ80 },
|
|
{ "halt", 0x00, 0x76, emit_insn, INS_ALL },
|
|
{ "im", 0xED, 0x46, emit_im, INS_NOT_GBZ80 },
|
|
{ "in", 0x00, 0x00, emit_in, INS_NOT_GBZ80 },
|
|
{ "in0", 0xED, 0x00, emit_in0, INS_Z180|INS_EZ80 },
|
|
{ "inc", 0x03, 0x04, emit_incdec,INS_ALL },
|
|
{ "ind", 0xED, 0xAA, emit_insn, INS_NOT_GBZ80 },
|
|
{ "ind2", 0xED, 0x8C, emit_insn, INS_EZ80 },
|
|
{ "ind2r",0xED, 0x9C, emit_insn, INS_EZ80 },
|
|
{ "indm", 0xED, 0x8A, emit_insn, INS_EZ80 },
|
|
{ "indmr",0xED, 0x9A, emit_insn, INS_EZ80 },
|
|
{ "indr", 0xED, 0xBA, emit_insn, INS_NOT_GBZ80 },
|
|
{ "indrx",0xED, 0xCA, emit_insn, INS_EZ80 },
|
|
{ "ini", 0xED, 0xA2, emit_insn, INS_NOT_GBZ80 },
|
|
{ "ini2", 0xED, 0x84, emit_insn, INS_EZ80 },
|
|
{ "ini2r",0xED, 0x94, emit_insn, INS_EZ80 },
|
|
{ "inim", 0xED, 0x82, emit_insn, INS_EZ80 },
|
|
{ "inimr",0xED, 0x92, emit_insn, INS_EZ80 },
|
|
{ "inir", 0xED, 0xB2, emit_insn, INS_NOT_GBZ80 },
|
|
{ "inirx",0xED, 0xC2, emit_insn, INS_EZ80 },
|
|
{ "jp", 0xC3, 0xC2, emit_jpcc, INS_ALL },
|
|
{ "jr", 0x18, 0x20, emit_jrcc, INS_ALL },
|
|
{ "ld", 0x00, 0x00, emit_ld, INS_ALL },
|
|
{ "ldd", 0xED, 0xA8, emit_lddldi,INS_ALL }, /* GBZ80 has special meaning */
|
|
{ "lddr", 0xED, 0xB8, emit_insn, INS_NOT_GBZ80 },
|
|
{ "ldh", 0xE0, 0x00, emit_ldh, INS_GBZ80 },
|
|
{ "ldhl", 0xE0, 0x00, emit_ldh, INS_GBZ80 },
|
|
{ "ldi", 0xED, 0xA0, emit_lddldi,INS_ALL }, /* GBZ80 has special meaning */
|
|
{ "ldir", 0xED, 0xB0, emit_insn, INS_NOT_GBZ80 },
|
|
{ "lea", 0xED, 0x02, emit_lea, INS_EZ80 },
|
|
{ "mlt", 0xED, 0x4C, emit_mlt, INS_Z180|INS_EZ80 },
|
|
{ "mulub",0xED, 0xC5, emit_mulub,INS_R800 },
|
|
{ "muluw",0xED, 0xC3, emit_muluw,INS_R800 },
|
|
{ "neg", 0xed, 0x44, emit_insn, INS_NOT_GBZ80 },
|
|
{ "nop", 0x00, 0x00, emit_insn, INS_ALL },
|
|
{ "or", 0x00, 0xB0, emit_s, INS_ALL },
|
|
{ "otd2r",0xED, 0xBC, emit_insn, INS_EZ80 },
|
|
{ "otdm", 0xED, 0x8B, emit_insn, INS_Z180|INS_EZ80 },
|
|
{ "otdmr",0xED, 0x9B, emit_insn, INS_Z180|INS_EZ80 },
|
|
{ "otdr", 0xED, 0xBB, emit_insn, INS_NOT_GBZ80 },
|
|
{ "otdrx",0xED, 0xCB, emit_insn, INS_EZ80 },
|
|
{ "oti2r",0xED, 0xB4, emit_insn, INS_EZ80 },
|
|
{ "otim", 0xED, 0x83, emit_insn, INS_Z180|INS_EZ80 },
|
|
{ "otimr",0xED, 0x93, emit_insn, INS_Z180|INS_EZ80 },
|
|
{ "otir", 0xED, 0xB3, emit_insn, INS_NOT_GBZ80 },
|
|
{ "otirx",0xED, 0xC3, emit_insn, INS_EZ80 },
|
|
{ "out", 0x00, 0x00, emit_out, INS_NOT_GBZ80 },
|
|
{ "out0", 0xED, 0x01, emit_out0, INS_Z180|INS_EZ80 },
|
|
{ "outd", 0xED, 0xAB, emit_insn, INS_NOT_GBZ80 },
|
|
{ "outd2",0xED, 0xAC, emit_insn, INS_EZ80 },
|
|
{ "outi", 0xED, 0xA3, emit_insn, INS_NOT_GBZ80 },
|
|
{ "outi2",0xED, 0xA4, emit_insn, INS_EZ80 },
|
|
{ "pea", 0xED, 0x65, emit_pea, INS_EZ80 },
|
|
{ "pop", 0x00, 0xC1, emit_pop, INS_ALL },
|
|
{ "push", 0x00, 0xC5, emit_pop, INS_ALL },
|
|
{ "res", 0xCB, 0x80, emit_bit, INS_ALL },
|
|
{ "ret", 0xC9, 0xC0, emit_retcc,INS_ALL },
|
|
{ "reti", 0xED, 0x4D, emit_reti, INS_ALL }, /*GBZ80 has its own opcode for it*/
|
|
{ "retn", 0xED, 0x45, emit_insn, INS_NOT_GBZ80 },
|
|
{ "rl", 0xCB, 0x10, emit_mr, INS_ALL },
|
|
{ "rla", 0x00, 0x17, emit_insn, INS_ALL },
|
|
{ "rlc", 0xCB, 0x00, emit_mr, INS_ALL },
|
|
{ "rlca", 0x00, 0x07, emit_insn, INS_ALL },
|
|
{ "rld", 0xED, 0x6F, emit_insn, INS_NOT_GBZ80 },
|
|
{ "rr", 0xCB, 0x18, emit_mr, INS_ALL },
|
|
{ "rra", 0x00, 0x1F, emit_insn, INS_ALL },
|
|
{ "rrc", 0xCB, 0x08, emit_mr, INS_ALL },
|
|
{ "rrca", 0x00, 0x0F, emit_insn, INS_ALL },
|
|
{ "rrd", 0xED, 0x67, emit_insn, INS_NOT_GBZ80 },
|
|
{ "rsmix",0xED, 0x7E, emit_insn, INS_EZ80 },
|
|
{ "rst", 0x00, 0xC7, emit_rst, INS_ALL },
|
|
{ "sbc", 0x98, 0x42, emit_adc, INS_ALL },
|
|
{ "scf", 0x00, 0x37, emit_insn, INS_ALL },
|
|
{ "set", 0xCB, 0xC0, emit_bit, INS_ALL },
|
|
{ "sla", 0xCB, 0x20, emit_mr, INS_ALL },
|
|
{ "sli", 0xCB, 0x30, emit_mr, INS_SLI },
|
|
{ "sll", 0xCB, 0x30, emit_mr, INS_SLI },
|
|
{ "slp", 0xED, 0x76, emit_insn, INS_Z180|INS_EZ80 },
|
|
{ "sra", 0xCB, 0x28, emit_mr, INS_ALL },
|
|
{ "srl", 0xCB, 0x38, emit_mr, INS_ALL },
|
|
{ "stmix",0xED, 0x7D, emit_insn, INS_EZ80 },
|
|
{ "stop", 0x00, 0x10, emit_insn, INS_GBZ80 },
|
|
{ "sub", 0x00, 0x90, emit_s, INS_ALL },
|
|
{ "swap", 0xCB, 0x30, emit_mr, INS_GBZ80 },
|
|
{ "tst", 0xED, 0x04, emit_tst, INS_Z180|INS_EZ80 },
|
|
{ "tstio",0xED, 0x74, emit_tstio,INS_Z180|INS_EZ80 },
|
|
{ "xor", 0x00, 0xA8, emit_s, INS_ALL },
|
|
} ;
|
|
|
|
void
|
|
md_assemble (char *str)
|
|
{
|
|
const char *p;
|
|
char * old_ptr;
|
|
int i;
|
|
table_t *insp;
|
|
|
|
err_flag = 0;
|
|
inst_mode = cpu_mode ? (INST_MODE_L | INST_MODE_IL) : (INST_MODE_S | INST_MODE_IS);
|
|
old_ptr = input_line_pointer;
|
|
p = skip_space (str);
|
|
for (i = 0; (i < BUFLEN) && (ISALPHA (*p) || ISDIGIT (*p));)
|
|
buf[i++] = TOLOWER (*p++);
|
|
|
|
if (i == BUFLEN)
|
|
{
|
|
buf[BUFLEN-3] = buf[BUFLEN-2] = '.'; /* Mark opcode as abbreviated. */
|
|
buf[BUFLEN-1] = 0;
|
|
as_bad (_("Unknown instruction '%s'"), buf);
|
|
}
|
|
else
|
|
{
|
|
if ((*p) && (!ISSPACE (*p)))
|
|
{
|
|
if (*p != '.' || !(ins_ok & INS_EZ80) || !assemble_suffix (&p))
|
|
{
|
|
as_bad (_("syntax error"));
|
|
goto end;
|
|
}
|
|
}
|
|
buf[i] = 0;
|
|
p = skip_space (p);
|
|
key = buf;
|
|
|
|
insp = bsearch (&key, instab, ARRAY_SIZE (instab),
|
|
sizeof (instab[0]), key_cmp);
|
|
if (!insp || (insp->inss && !(insp->inss & ins_ok)))
|
|
{
|
|
as_bad (_("Unknown instruction '%s'"), buf);
|
|
*frag_more (1) = 0;
|
|
}
|
|
else
|
|
{
|
|
p = insp->fp (insp->prefix, insp->opcode, p);
|
|
p = skip_space (p);
|
|
if ((!err_flag) && *p)
|
|
as_bad (_("junk at end of line, first unrecognized character is `%c'"),
|
|
*p);
|
|
}
|
|
}
|
|
end:
|
|
input_line_pointer = old_ptr;
|
|
}
|
|
|
|
void
|
|
md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED)
|
|
{
|
|
long val = * (long *) valP;
|
|
char *p_lit = fixP->fx_where + fixP->fx_frag->fr_literal;
|
|
|
|
switch (fixP->fx_r_type)
|
|
{
|
|
case BFD_RELOC_8_PCREL:
|
|
if (fixP->fx_addsy)
|
|
{
|
|
fixP->fx_no_overflow = 1;
|
|
fixP->fx_done = 0;
|
|
}
|
|
else
|
|
{
|
|
fixP->fx_no_overflow = (-128 <= val && val < 128);
|
|
if (!fixP->fx_no_overflow)
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("relative jump out of range"));
|
|
*p_lit++ = val;
|
|
fixP->fx_done = 1;
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_DISP8:
|
|
if (fixP->fx_addsy)
|
|
{
|
|
fixP->fx_no_overflow = 1;
|
|
fixP->fx_done = 0;
|
|
}
|
|
else
|
|
{
|
|
fixP->fx_no_overflow = (-128 <= val && val < 128);
|
|
if (!fixP->fx_no_overflow)
|
|
as_bad_where (fixP->fx_file, fixP->fx_line,
|
|
_("index offset out of range"));
|
|
*p_lit++ = val;
|
|
fixP->fx_done = 1;
|
|
}
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_BYTE0:
|
|
*p_lit++ = val;
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_BYTE1:
|
|
*p_lit++ = (val >> 8);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_BYTE2:
|
|
*p_lit++ = (val >> 16);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_BYTE3:
|
|
*p_lit++ = (val >> 24);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_8:
|
|
if (val > 255 || val < -128)
|
|
as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow"));
|
|
*p_lit++ = val;
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_WORD1:
|
|
*p_lit++ = (val >> 16);
|
|
*p_lit++ = (val >> 24);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_Z80_WORD0:
|
|
case BFD_RELOC_16:
|
|
*p_lit++ = val;
|
|
*p_lit++ = (val >> 8);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_24: /* Def24 may produce this. */
|
|
*p_lit++ = val;
|
|
*p_lit++ = (val >> 8);
|
|
*p_lit++ = (val >> 16);
|
|
fixP->fx_no_overflow = 1;
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
case BFD_RELOC_32: /* Def32 and .long may produce this. */
|
|
*p_lit++ = val;
|
|
*p_lit++ = (val >> 8);
|
|
*p_lit++ = (val >> 16);
|
|
*p_lit++ = (val >> 24);
|
|
if (fixP->fx_addsy == NULL)
|
|
fixP->fx_done = 1;
|
|
break;
|
|
|
|
default:
|
|
printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type);
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* GAS will call this to generate a reloc. GAS will pass the
|
|
resulting reloc to `bfd_install_relocation'. This currently works
|
|
poorly, as `bfd_install_relocation' often does the wrong thing, and
|
|
instances of `tc_gen_reloc' have been written to work around the
|
|
problems, which in turns makes it difficult to fix
|
|
`bfd_install_relocation'. */
|
|
|
|
/* If while processing a fixup, a reloc really
|
|
needs to be created then it is done here. */
|
|
|
|
arelent *
|
|
tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp)
|
|
{
|
|
arelent *reloc;
|
|
|
|
if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type))
|
|
{
|
|
as_bad_where (fixp->fx_file, fixp->fx_line,
|
|
_("reloc %d not supported by object file format"),
|
|
(int) fixp->fx_r_type);
|
|
return NULL;
|
|
}
|
|
|
|
reloc = XNEW (arelent);
|
|
reloc->sym_ptr_ptr = XNEW (asymbol *);
|
|
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
|
|
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
|
|
reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
|
|
reloc->addend = fixp->fx_offset;
|
|
|
|
return reloc;
|
|
}
|
|
|
|
int
|
|
z80_tc_label_is_local (const char *name)
|
|
{
|
|
const char *n;
|
|
const char *p;
|
|
if (local_label_prefix == NULL)
|
|
return 0;
|
|
for (p = local_label_prefix, n = name; *p && *n && *n == *p; p++, n++)
|
|
;
|
|
return *p == '\0';
|
|
}
|
|
|
|
/* Parse floating point number from string and compute mantissa and
|
|
exponent. Mantissa is normalized.
|
|
*/
|
|
#define EXP_MIN -0x10000
|
|
#define EXP_MAX 0x10000
|
|
static int
|
|
str_to_broken_float (bfd_boolean *signP, bfd_uint64_t *mantissaP, int *expP)
|
|
{
|
|
char *p;
|
|
bfd_boolean sign;
|
|
bfd_uint64_t mantissa = 0;
|
|
int exponent = 0;
|
|
int i;
|
|
|
|
p = (char*)skip_space (input_line_pointer);
|
|
sign = (*p == '-');
|
|
*signP = sign;
|
|
if (sign || *p == '+')
|
|
++p;
|
|
if (strncasecmp (p, "NaN", 3) == 0)
|
|
{
|
|
*mantissaP = 0;
|
|
*expP = 0;
|
|
input_line_pointer = p + 3;
|
|
return 1;
|
|
}
|
|
if (strncasecmp (p, "inf", 3) == 0)
|
|
{
|
|
*mantissaP = 1ull << 63;
|
|
*expP = EXP_MAX;
|
|
input_line_pointer = p + 3;
|
|
return 1;
|
|
}
|
|
for (; ISDIGIT (*p); ++p)
|
|
{
|
|
if (mantissa >> 60)
|
|
{
|
|
if (*p >= '5')
|
|
mantissa++;
|
|
break;
|
|
}
|
|
mantissa = mantissa * 10 + (*p - '0');
|
|
}
|
|
/* skip non-significant digits */
|
|
for (; ISDIGIT (*p); ++p)
|
|
exponent++;
|
|
|
|
if (*p == '.')
|
|
{
|
|
p++;
|
|
if (!exponent) /* If no precission overflow. */
|
|
{
|
|
for (; ISDIGIT (*p); ++p, --exponent)
|
|
{
|
|
if (mantissa >> 60)
|
|
{
|
|
if (*p >= '5')
|
|
mantissa++;
|
|
break;
|
|
}
|
|
mantissa = mantissa * 10 + (*p - '0');
|
|
}
|
|
}
|
|
for (; ISDIGIT (*p); ++p)
|
|
;
|
|
}
|
|
if (*p == 'e' || *p == 'E')
|
|
{
|
|
int es;
|
|
int t = 0;
|
|
++p;
|
|
es = (*p == '-');
|
|
if (es || *p == '+')
|
|
p++;
|
|
for (; ISDIGIT (*p); ++p)
|
|
{
|
|
if (t < 100)
|
|
t = t * 10 + (*p - '0');
|
|
}
|
|
exponent += (es) ? -t : t;
|
|
}
|
|
if (ISALNUM (*p) || *p == '.')
|
|
return 0;
|
|
input_line_pointer = p;
|
|
if (mantissa == 0)
|
|
{
|
|
*mantissaP = 1ull << 63;
|
|
*expP = EXP_MIN;
|
|
return 1; /* result is 0 */
|
|
}
|
|
/* normalization */
|
|
for (; mantissa <= ~0ull/10; --exponent)
|
|
mantissa *= 10;
|
|
/* Now we have sign, mantissa, and signed decimal exponent
|
|
need to recompute to binary exponent. */
|
|
for (i = 64; exponent > 0; --exponent)
|
|
{
|
|
/* be sure that no integer overflow */
|
|
while (mantissa > ~0ull/10)
|
|
{
|
|
mantissa >>= 1;
|
|
i += 1;
|
|
}
|
|
mantissa *= 10;
|
|
}
|
|
for (; exponent < 0; ++exponent)
|
|
{
|
|
while (!(mantissa >> 63))
|
|
{
|
|
mantissa <<= 1;
|
|
i -= 1;
|
|
}
|
|
mantissa /= 10;
|
|
}
|
|
/* normalization */
|
|
for (; !(mantissa >> 63); --i)
|
|
mantissa <<= 1;
|
|
*mantissaP = mantissa;
|
|
*expP = i;
|
|
return 1;
|
|
}
|
|
|
|
static const char *
|
|
str_to_zeda32(char *litP, int *sizeP)
|
|
{
|
|
bfd_uint64_t mantissa;
|
|
bfd_boolean sign;
|
|
int exponent;
|
|
unsigned i;
|
|
|
|
*sizeP = 4;
|
|
if (!str_to_broken_float (&sign, &mantissa, &exponent))
|
|
return _("invalid syntax");
|
|
/* I do not know why decrement is needed */
|
|
--exponent;
|
|
/* shift by 39 bits right keeping 25 bit mantissa for rounding */
|
|
mantissa >>= 39;
|
|
/* do rounding */
|
|
++mantissa;
|
|
/* make 24 bit mantissa */
|
|
mantissa >>= 1;
|
|
/* check for overflow */
|
|
if (mantissa >> 24)
|
|
{
|
|
mantissa >>= 1;
|
|
++exponent;
|
|
}
|
|
/* check for 0 */
|
|
if (exponent < -127)
|
|
{
|
|
exponent = -128;
|
|
mantissa = 0;
|
|
}
|
|
else if (exponent > 127)
|
|
{
|
|
exponent = -128;
|
|
mantissa = sign ? 0xc00000 : 0x400000;
|
|
}
|
|
else if (mantissa == 0)
|
|
{
|
|
exponent = -128;
|
|
mantissa = 0x200000;
|
|
}
|
|
else if (!sign)
|
|
mantissa &= (1ull << 23) - 1;
|
|
for (i = 0; i < 24; i += 8)
|
|
*litP++ = (char)(mantissa >> i);
|
|
*litP = (char)(0x80 + exponent);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
Math48 by Anders Hejlsberg support.
|
|
Mantissa is 39 bits wide, exponent 8 bit wide.
|
|
Format is:
|
|
bit 47: sign
|
|
bit 46-8: normalized mantissa (bits 38-0, bit39 assumed to be 1)
|
|
bit 7-0: exponent+128 (0 - value is null)
|
|
MIN: 2.938735877e-39
|
|
MAX: 1.701411835e+38
|
|
*/
|
|
static const char *
|
|
str_to_float48(char *litP, int *sizeP)
|
|
{
|
|
bfd_uint64_t mantissa;
|
|
bfd_boolean sign;
|
|
int exponent;
|
|
unsigned i;
|
|
|
|
*sizeP = 6;
|
|
if (!str_to_broken_float (&sign, &mantissa, &exponent))
|
|
return _("invalid syntax");
|
|
/* shift by 23 bits right keeping 41 bit mantissa for rounding */
|
|
mantissa >>= 23;
|
|
/* do rounding */
|
|
++mantissa;
|
|
/* make 40 bit mantissa */
|
|
mantissa >>= 1;
|
|
/* check for overflow */
|
|
if (mantissa >> 40)
|
|
{
|
|
mantissa >>= 1;
|
|
++exponent;
|
|
}
|
|
if (exponent < -127)
|
|
{
|
|
memset (litP, 0, 6);
|
|
return NULL;
|
|
}
|
|
if (exponent > 127)
|
|
return _("overflow");
|
|
if (!sign)
|
|
mantissa &= (1ull << 39) - 1;
|
|
*litP++ = (char)(0x80 + exponent);
|
|
for (i = 0; i < 40; i += 8)
|
|
*litP++ = (char)(mantissa >> i);
|
|
return NULL;
|
|
}
|