--- /dev/null
+/* Print National Semiconductor 32000 instructions.
+ Copyright 1986, 1988, 1991, 1992, 1994 Free Software Foundation, Inc.
+
+This file is part of opcodes library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "dis-asm.h"
+#if !defined(const) && !defined(__STDC__)
+#define const
+#endif
+#include "opcode/ns32k.h"
+
+static disassemble_info *dis_info;
+
+/*
+ * Hacks to get it to compile <= READ THESE AS FIXES NEEDED
+ */
+#define CORE_ADDR unsigned long
+#define INVALID_FLOAT(val, size) invalid_float(val, size)
+
+static long read_memory_integer(addr, nr)
+ unsigned char *addr;
+ int nr;
+{
+ long val;
+ int i;
+ for (val = 0, i = nr - 1; i >= 0; i--) {
+ val = (val << 8);
+ val |= (0xff & *(addr + i));
+ }
+ return val;
+}
+
+/* 32000 instructions are never longer than this. */
+#define MAXLEN 62
+
+
+#include <setjmp.h>
+
+struct private
+{
+ /* Points to first byte not fetched. */
+ bfd_byte *max_fetched;
+ bfd_byte the_buffer[MAXLEN];
+ bfd_vma insn_start;
+ jmp_buf bailout;
+};
+
+
+/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
+ to ADDR (exclusive) are valid. Returns 1 for success, longjmps
+ on error. */
+#define FETCH_DATA(info, addr) \
+ ((addr) <= ((struct private *)(info->private_data))->max_fetched \
+ ? 1 : fetch_data ((info), (addr)))
+
+static int
+fetch_data (info, addr)
+ struct disassemble_info *info;
+ bfd_byte *addr;
+{
+ int status;
+ struct private *priv = (struct private *)info->private_data;
+ bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
+
+ status = (*info->read_memory_func) (start,
+ priv->max_fetched,
+ addr - priv->max_fetched,
+ info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, start, info);
+ longjmp (priv->bailout, 1);
+ }
+ else
+ priv->max_fetched = addr;
+ return 1;
+}
+/* Number of elements in the opcode table. */
+#define NOPCODES (sizeof ns32k_opcodes / sizeof ns32k_opcodes[0])
+
+#define NEXT_IS_ADDR '|'
+
+\f
+struct option {
+ char *pattern; /* the option itself */
+ unsigned long value; /* binary value of the option */
+ unsigned long match; /* these bits must match */
+};
+
+\f
+static struct option opt_u[]= /* restore, exit */
+{
+ { "r0", 0x80, 0x80 },
+ { "r1", 0x40, 0x40 },
+ { "r2", 0x20, 0x20 },
+ { "r3", 0x10, 0x10 },
+ { "r4", 0x08, 0x08 },
+ { "r5", 0x04, 0x04 },
+ { "r6", 0x02, 0x02 },
+ { "r7", 0x01, 0x01 },
+ { 0 , 0x00, 0x00 }
+};
+
+static struct option opt_U[]= /* save, enter */
+{
+ { "r0", 0x01, 0x01 },
+ { "r1", 0x02, 0x02 },
+ { "r2", 0x04, 0x04 },
+ { "r3", 0x08, 0x08 },
+ { "r4", 0x10, 0x10 },
+ { "r5", 0x20, 0x20 },
+ { "r6", 0x40, 0x40 },
+ { "r7", 0x80, 0x80 },
+ { 0 , 0x00, 0x00 }
+};
+
+static struct option opt_O[]= /* setcfg */
+{
+ { "c", 0x8, 0x8 },
+ { "m", 0x4, 0x4 },
+ { "f", 0x2, 0x2 },
+ { "i", 0x1, 0x1 },
+ { 0 , 0x0, 0x0 }
+};
+
+static struct option opt_C[]= /* cinv */
+{
+ { "a", 0x4, 0x4 },
+ { "i", 0x2, 0x2 },
+ { "d", 0x1, 0x1 },
+ { 0 , 0x0, 0x0 }
+};
+
+static struct option opt_S[]= /* string inst */
+{
+ { "b", 0x1, 0x1 },
+ { "u", 0x6, 0x6 },
+ { "w", 0x2, 0x2 },
+ { 0 , 0x0, 0x0 }
+};
+
+static struct option list_P532[]= /* lpr spr */
+{
+ { "us", 0x0, 0xf },
+ { "dcr", 0x1, 0xf },
+ { "bpc", 0x2, 0xf },
+ { "dsr", 0x3, 0xf },
+ { "car", 0x4, 0xf },
+ { "fp", 0x8, 0xf },
+ { "sp", 0x9, 0xf },
+ { "sb", 0xa, 0xf },
+ { "usp", 0xb, 0xf },
+ { "cfg", 0xc, 0xf },
+ { "psr", 0xd, 0xf },
+ { "intbase", 0xe, 0xf },
+ { "mod", 0xf, 0xf },
+ { 0 , 0x00, 0xf }
+};
+
+static struct option list_M532[]= /* lmr smr */
+{
+ { "mcr", 0x9, 0xf },
+ { "msr", 0xa, 0xf },
+ { "tear", 0xb, 0xf },
+ { "ptb0", 0xc, 0xf },
+ { "ptb1", 0xd, 0xf },
+ { "ivar0", 0xe, 0xf },
+ { "ivar1", 0xf, 0xf },
+ { 0 , 0x0, 0xf }
+};
+
+static struct option list_P032[]= /* lpr spr */
+{
+ { "upsr", 0x0, 0xf },
+ { "fp", 0x8, 0xf },
+ { "sp", 0x9, 0xf },
+ { "sb", 0xa, 0xf },
+ { "psr", 0xb, 0xf },
+ { "intbase", 0xe, 0xf },
+ { "mod", 0xf, 0xf },
+ { 0 , 0x0, 0xf }
+};
+
+static struct option list_M032[]= /* lmr smr */
+{
+ { "bpr0", 0x0, 0xf },
+ { "bpr1", 0x1, 0xf },
+ { "pf0", 0x4, 0xf },
+ { "pf1", 0x5, 0xf },
+ { "sc", 0x8, 0xf },
+ { "msr", 0xa, 0xf },
+ { "bcnt", 0xb, 0xf },
+ { "ptb0", 0xc, 0xf },
+ { "ptb1", 0xd, 0xf },
+ { "eia", 0xf, 0xf },
+ { 0 , 0x0, 0xf }
+};
+
+
+/*
+ * figure out which options are present
+ */
+static void
+optlist(options, optionP, result)
+ int options;
+ struct option *optionP;
+ char *result;
+{
+ if (options == 0) {
+ sprintf(result, "[]");
+ return;
+ }
+ sprintf(result, "[");
+
+ for (; (options != 0) && optionP->pattern; optionP++) {
+ if ((options & optionP->match) == optionP->value) {
+ /* we found a match, update result and options */
+ strcat(result, optionP->pattern);
+ options &= ~optionP->value;
+ if (options != 0) /* more options to come */
+ strcat(result, ",");
+ }
+ }
+ if (options != 0)
+ strcat(result, "undefined");
+
+ strcat(result, "]");
+}
+
+static list_search(reg_value, optionP, result)
+ int reg_value;
+ struct option *optionP;
+ char *result;
+{
+ for (; optionP->pattern; optionP++) {
+ if ((reg_value & optionP->match) == optionP->value) {
+ sprintf(result, "%s", optionP->pattern);
+ return;
+ }
+ }
+ sprintf(result, "undefined");
+}
+\f
+/*
+ * extract "count" bits starting "offset" bits
+ * into buffer
+ */
+
+static int
+bit_extract (buffer, offset, count)
+ bfd_byte *buffer;
+ int offset;
+ int count;
+{
+ int result;
+ int mask;
+ int bit;
+
+ buffer += offset >> 3;
+ offset &= 7;
+ bit = 1;
+ result = 0;
+ while (count--)
+ {
+ FETCH_DATA(dis_info, buffer + 1);
+ if ((*buffer & (1 << offset)))
+ result |= bit;
+ if (++offset == 8)
+ {
+ offset = 0;
+ buffer++;
+ }
+ bit <<= 1;
+ }
+ return result;
+}
+
+static void
+bit_copy (buffer, offset, count, to)
+ char *buffer;
+ int offset;
+ int count;
+ char *to;
+{
+ for(; count > 8; count -= 8, to++, offset += 8)
+ *to = bit_extract (buffer, offset, 8);
+ *to = bit_extract (buffer, offset, count);
+}
+
+
+static sign_extend (value, bits)
+ int value, bits;
+{
+ value = value & ((1 << bits) - 1);
+ return (value & (1 << (bits-1))
+ ? value | (~((1 << bits) - 1))
+ : value);
+}
+
+static flip_bytes (ptr, count)
+ char *ptr;
+ int count;
+{
+ char tmp;
+
+ while (count > 0)
+ {
+ tmp = ptr[0];
+ ptr[0] = ptr[count-1];
+ ptr[count-1] = tmp;
+ ptr++;
+ count -= 2;
+ }
+}
+\f
+/* Given a character C, does it represent a general addressing mode? */
+#define Is_gen(c) \
+ ((c) == 'F' || (c) == 'L' || (c) == 'B' \
+ || (c) == 'W' || (c) == 'D' || (c) == 'A' || (c) == 'I' || (c) == 'Z')
+
+/* Adressing modes. */
+#define Adrmod_index_byte 0x1c
+#define Adrmod_index_word 0x1d
+#define Adrmod_index_doubleword 0x1e
+#define Adrmod_index_quadword 0x1f
+
+/* Is MODE an indexed addressing mode? */
+#define Adrmod_is_index(mode) \
+ (mode == Adrmod_index_byte \
+ || mode == Adrmod_index_word \
+ || mode == Adrmod_index_doubleword \
+ || mode == Adrmod_index_quadword)
+
+\f
+/* Print the 32000 instruction at address MEMADDR in debugged memory,
+ on STREAM. Returns length of the instruction, in bytes. */
+
+int
+print_insn_ns32k (memaddr, info)
+ bfd_vma memaddr;
+ disassemble_info *info;
+{
+ register int i;
+ register unsigned char *p;
+ register char *d;
+ unsigned short first_word;
+ int gen, disp;
+ int ioffset; /* bits into instruction */
+ int aoffset; /* bits into arguments */
+ char arg_bufs[MAX_ARGS+1][ARG_LEN];
+ int argnum;
+ int maxarg;
+ struct private priv;
+ bfd_byte *buffer = priv.the_buffer;
+ dis_info = info;
+
+ info->private_data = (PTR) &priv;
+ priv.max_fetched = priv.the_buffer;
+ priv.insn_start = memaddr;
+ if (setjmp (priv.bailout) != 0)
+ /* Error return. */
+ return -1;
+
+ /* Look for 8bit opcodes first. Other wise, fetching two bytes could take
+ * us over the end of accessible data unnecessarilly
+ */
+ FETCH_DATA(info, buffer + 1);
+ for (i = 0; i < NOPCODES; i++)
+ if (ns32k_opcodes[i].opcode_id_size <= 8
+ && ((buffer[0] & ((1 << ns32k_opcodes[i].opcode_id_size) - 1))
+ == ns32k_opcodes[i].opcode_seed))
+ break;
+ if (i == NOPCODES) {
+ /* Maybe it is 9 to 16 bits big */
+ FETCH_DATA(info, buffer + 2);
+ first_word = read_memory_integer(buffer, 2);
+
+ for (i = 0; i < NOPCODES; i++)
+ if ((first_word & ((1 << ns32k_opcodes[i].opcode_id_size) - 1))
+ == ns32k_opcodes[i].opcode_seed)
+ break;
+
+ /* Handle undefined instructions. */
+ if (i == NOPCODES)
+ {
+ (*dis_info->fprintf_func)(dis_info->stream, "0%o", buffer[0]);
+ return 1;
+ }
+ }
+
+ (*dis_info->fprintf_func)(dis_info->stream, "%s", ns32k_opcodes[i].name);
+
+ ioffset = ns32k_opcodes[i].opcode_size;
+ aoffset = ns32k_opcodes[i].opcode_size;
+ d = ns32k_opcodes[i].operands;
+
+ if (*d)
+ {
+ /* Offset in bits of the first thing beyond each index byte.
+ Element 0 is for operand A and element 1 is for operand B.
+ The rest are irrelevant, but we put them here so we don't
+ index outside the array. */
+ int index_offset[MAX_ARGS];
+
+ /* 0 for operand A, 1 for operand B, greater for other args. */
+ int whicharg = 0;
+
+ (*dis_info->fprintf_func)(dis_info->stream, "\t");
+
+ maxarg = 0;
+
+ /* First we have to find and keep track of the index bytes,
+ if we are using scaled indexed addressing mode, since the index
+ bytes occur right after the basic instruction, not as part
+ of the addressing extension. */
+ if (Is_gen(d[1]))
+ {
+ int addr_mode = bit_extract (buffer, ioffset - 5, 5);
+
+ if (Adrmod_is_index (addr_mode))
+ {
+ aoffset += 8;
+ index_offset[0] = aoffset;
+ }
+ }
+ if (d[2] && Is_gen(d[3]))
+ {
+ int addr_mode = bit_extract (buffer, ioffset - 10, 5);
+
+ if (Adrmod_is_index (addr_mode))
+ {
+ aoffset += 8;
+ index_offset[1] = aoffset;
+ }
+ }
+
+ while (*d)
+ {
+ argnum = *d - '1';
+ d++;
+ if (argnum > maxarg && argnum < MAX_ARGS)
+ maxarg = argnum;
+ ioffset = print_insn_arg (*d, ioffset, &aoffset, buffer,
+ memaddr, arg_bufs[argnum],
+ index_offset[whicharg]);
+ d++;
+ whicharg++;
+ }
+ for (argnum = 0; argnum <= maxarg; argnum++)
+ {
+ CORE_ADDR addr;
+ char *ch;
+ for (ch = arg_bufs[argnum]; *ch;)
+ {
+ if (*ch == NEXT_IS_ADDR)
+ {
+ ++ch;
+ addr = atoi (ch);
+ (*dis_info->print_address_func) (addr, dis_info);
+ while (*ch && *ch != NEXT_IS_ADDR)
+ ++ch;
+ if (*ch)
+ ++ch;
+ }
+ else
+ (*dis_info->fprintf_func)(dis_info->stream, "%c", *ch++);
+ }
+ if (argnum < maxarg)
+ (*dis_info->fprintf_func)(dis_info->stream, ", ");
+ }
+ }
+ return aoffset / 8;
+}
+
+/* Print an instruction operand of category given by d. IOFFSET is
+ the bit position below which small (<1 byte) parts of the operand can
+ be found (usually in the basic instruction, but for indexed
+ addressing it can be in the index byte). AOFFSETP is a pointer to the
+ bit position of the addressing extension. BUFFER contains the
+ instruction. ADDR is where BUFFER was read from. Put the disassembled
+ version of the operand in RESULT. INDEX_OFFSET is the bit position
+ of the index byte (it contains garbage if this operand is not a
+ general operand using scaled indexed addressing mode). */
+
+print_insn_arg (d, ioffset, aoffsetp, buffer, addr, result, index_offset)
+ char d;
+ int ioffset, *aoffsetp;
+ char *buffer;
+ CORE_ADDR addr;
+ char *result;
+ int index_offset;
+{
+ int addr_mode;
+ float Fvalue;
+ double Lvalue;
+ int Ivalue;
+ int disp1, disp2;
+ int index;
+ int size;
+
+ switch (d)
+ {
+ case 'f':
+ /* a "gen" operand but 5 bits from the end of instruction */
+ ioffset -= 5;
+ case 'Z':
+ case 'F':
+ case 'L':
+ case 'I':
+ case 'B':
+ case 'W':
+ case 'D':
+ case 'A':
+ addr_mode = bit_extract (buffer, ioffset-5, 5);
+ ioffset -= 5;
+ switch (addr_mode)
+ {
+ case 0x0: case 0x1: case 0x2: case 0x3:
+ case 0x4: case 0x5: case 0x6: case 0x7:
+ /* register mode R0 -- R7 */
+ switch (d)
+ {
+ case 'F':
+ case 'L':
+ case 'Z':
+ sprintf (result, "f%d", addr_mode);
+ break;
+ default:
+ sprintf (result, "r%d", addr_mode);
+ }
+ break;
+ case 0x8: case 0x9: case 0xa: case 0xb:
+ case 0xc: case 0xd: case 0xe: case 0xf:
+ /* Register relative disp(R0 -- R7) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "%d(r%d)", disp1, addr_mode & 7);
+ break;
+ case 0x10:
+ case 0x11:
+ case 0x12:
+ /* Memory relative disp2(disp1(FP, SP, SB)) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ disp2 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "%d(%d(%s))", disp2, disp1,
+ addr_mode==0x10?"fp":addr_mode==0x11?"sp":"sb");
+ break;
+ case 0x13:
+ /* reserved */
+ sprintf (result, "reserved");
+ break;
+ case 0x14:
+ /* Immediate */
+ switch (d)
+ {
+ case 'I': case 'Z': case 'A':
+ /* I and Z are output operands and can`t be immediate
+ * A is an address and we can`t have the address of
+ * an immediate either. We don't know how much to increase
+ * aoffsetp by since whatever generated this is broken
+ * anyway!
+ */
+ sprintf (result, "$<undefined>");
+ break;
+ case 'B':
+ Ivalue = bit_extract (buffer, *aoffsetp, 8);
+ Ivalue = sign_extend (Ivalue, 8);
+ *aoffsetp += 8;
+ sprintf (result, "$%d", Ivalue);
+ break;
+ case 'W':
+ Ivalue = bit_extract (buffer, *aoffsetp, 16);
+ flip_bytes (&Ivalue, 2);
+ *aoffsetp += 16;
+ Ivalue = sign_extend (Ivalue, 16);
+ sprintf (result, "$%d", Ivalue);
+ break;
+ case 'D':
+ Ivalue = bit_extract (buffer, *aoffsetp, 32);
+ flip_bytes (&Ivalue, 4);
+ *aoffsetp += 32;
+ sprintf (result, "$%d", Ivalue);
+ break;
+ case 'F':
+ bit_copy (buffer, *aoffsetp, 32, (char *) &Fvalue);
+ flip_bytes (&Fvalue, 4);
+ *aoffsetp += 32;
+ if (INVALID_FLOAT (&Fvalue, 4))
+ sprintf (result, "<<invalid float 0x%.8x>>", *(int *) &Fvalue);
+ else /* assume host has ieee float */
+ sprintf (result, "$%g", Fvalue);
+ break;
+ case 'L':
+ bit_copy (buffer, *aoffsetp, 64, (char *) &Lvalue);
+ flip_bytes (&Lvalue, 8);
+ *aoffsetp += 64;
+ if (INVALID_FLOAT (&Lvalue, 8))
+ sprintf (result, "<<invalid long 0x%.8x%.8x>>",
+ *(((int *) &Lvalue) + 1), *(int *) &Lvalue);
+ else /* assume host has ieee float */
+ sprintf (result, "$%g", Lvalue);
+ break;
+ }
+ break;
+ case 0x15:
+ /* Absolute @disp */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "@|%d|", disp1);
+ break;
+ case 0x16:
+ /* External EXT(disp1) + disp2 (Mod table stuff) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ disp2 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "EXT(%d) + %d", disp1, disp2);
+ break;
+ case 0x17:
+ /* Top of stack tos */
+ sprintf (result, "tos");
+ break;
+ case 0x18:
+ /* Memory space disp(FP) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "%d(fp)", disp1);
+ break;
+ case 0x19:
+ /* Memory space disp(SP) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "%d(sp)", disp1);
+ break;
+ case 0x1a:
+ /* Memory space disp(SB) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "%d(sb)", disp1);
+ break;
+ case 0x1b:
+ /* Memory space disp(PC) */
+ disp1 = get_displacement (buffer, aoffsetp);
+ sprintf (result, "|%d|", addr + disp1);
+ break;
+ case 0x1c:
+ case 0x1d:
+ case 0x1e:
+ case 0x1f:
+ /* Scaled index basemode[R0 -- R7:B,W,D,Q] */
+ index = bit_extract (buffer, index_offset - 8, 3);
+ print_insn_arg (d, index_offset, aoffsetp, buffer, addr,
+ result, 0);
+ {
+ static char *ind[] = {"b", "w", "d", "q"};
+ char *off;
+
+ off = result + strlen (result);
+ sprintf (off, "[r%d:%s]", index,
+ ind[addr_mode & 3]);
+ }
+ break;
+ }
+ break;
+ case 'H':
+ case 'q':
+ Ivalue = bit_extract (buffer, ioffset-4, 4);
+ Ivalue = sign_extend (Ivalue, 4);
+ sprintf (result, "%d", Ivalue);
+ ioffset -= 4;
+ break;
+ case 'r':
+ Ivalue = bit_extract (buffer, ioffset-3, 3);
+ sprintf (result, "r%d", Ivalue&7);
+ ioffset -= 3;
+ break;
+ case 'd':
+ sprintf (result, "%d", get_displacement (buffer, aoffsetp));
+ break;
+ case 'b':
+ Ivalue = get_displacement (buffer, aoffsetp);
+ /*
+ * Warning!! HACK ALERT!
+ * Operand type 'b' is only used by the cmp{b,w,d} and
+ * movm{b,w,d} instructions; we need to know whether
+ * it's a `b' or `w' or `d' instruction; and for both
+ * cmpm and movm it's stored at the same place so we
+ * just grab two bits of the opcode and look at it...
+ *
+ */
+ size = bit_extract(buffer, ioffset-6, 2);
+ if (size == 0) /* 00 => b */
+ size = 1;
+ else if (size == 1) /* 01 => w */
+ size = 2;
+ else
+ size = 4; /* 11 => d */
+
+ sprintf (result, "%d", (Ivalue / size) + 1);
+ break;
+ case 'p':
+ sprintf (result, "%c%d%c", NEXT_IS_ADDR,
+ addr + get_displacement (buffer, aoffsetp),
+ NEXT_IS_ADDR);
+ break;
+ case 'i':
+ Ivalue = bit_extract (buffer, *aoffsetp, 8);
+ *aoffsetp += 8;
+ sprintf (result, "0x%x", Ivalue);
+ break;
+ case 'u':
+ Ivalue = bit_extract (buffer, *aoffsetp, 8);
+ optlist(Ivalue, opt_u, result);
+ *aoffsetp += 8;
+ break;
+ case 'U':
+ Ivalue = bit_extract(buffer, *aoffsetp, 8);
+ optlist(Ivalue, opt_U, result);
+ *aoffsetp += 8;
+ break;
+ case 'O':
+ Ivalue = bit_extract(buffer, ioffset-9, 9);
+ optlist(Ivalue, opt_O, result);
+ ioffset -= 9;
+ break;
+ case 'C':
+ Ivalue = bit_extract(buffer, ioffset-4, 4);
+ optlist(Ivalue, opt_C, result);
+ ioffset -= 4;
+ break;
+ case 'S':
+ Ivalue = bit_extract(buffer, ioffset - 8, 8);
+ optlist(Ivalue, opt_S, result);
+ ioffset -= 8;
+ break;
+ case 'M':
+ Ivalue = bit_extract(buffer, ioffset-4, 4);
+ list_search(Ivalue, 0 ? list_M032 : list_M532, result);
+ ioffset -= 4;
+ break;
+ case 'P':
+ Ivalue = bit_extract(buffer, ioffset-4, 4);
+ list_search(Ivalue, 0 ? list_P032 : list_P532, result);
+ ioffset -= 4;
+ break;
+ case 'g':
+ Ivalue = bit_extract(buffer, *aoffsetp, 3);
+ sprintf(result, "%d", Ivalue);
+ *aoffsetp += 3;
+ break;
+ case 'G':
+ Ivalue = bit_extract(buffer, *aoffsetp, 5);
+ sprintf(result, "%d", Ivalue + 1);
+ *aoffsetp += 5;
+ break;
+ }
+ return ioffset;
+}
+
+get_displacement (buffer, aoffsetp)
+ char *buffer;
+ int *aoffsetp;
+{
+ int Ivalue;
+ short Ivalue2;
+
+ Ivalue = bit_extract (buffer, *aoffsetp, 8);
+ switch (Ivalue & 0xc0)
+ {
+ case 0x00:
+ case 0x40:
+ Ivalue = sign_extend (Ivalue, 7);
+ *aoffsetp += 8;
+ break;
+ case 0x80:
+ Ivalue2 = bit_extract (buffer, *aoffsetp, 16);
+ flip_bytes (&Ivalue2, 2);
+ Ivalue = sign_extend (Ivalue2, 14);
+ *aoffsetp += 16;
+ break;
+ case 0xc0:
+ Ivalue = bit_extract (buffer, *aoffsetp, 32);
+ flip_bytes (&Ivalue, 4);
+ Ivalue = sign_extend (Ivalue, 30);
+ *aoffsetp += 32;
+ break;
+ }
+ return Ivalue;
+}
+\f
+
+#if 1 /* a version that should work on ns32k f's&d's on any machine */
+int invalid_float(p, len)
+ register union { double d; float f; } *p;
+ register int len;
+{
+ register val;
+
+ if ( len == sizeof (float) )
+ val = (bit_extract(&p.f, 23, 8)/*exponent*/ == 0xff
+ || (bit_extract(&p, 23, 8)/*exponent*/ == 0 &&
+ bit_extract(&p, 0, 23)/*mantisa*/ != 0));
+ else if ( len == sizeof (double) )
+ val = (bit_extract(&p.d, 52, 11)/*exponent*/ == 0x7ff
+ || (bit_extract(&p, 52, 11)/*exponent*/ == 0
+ && (bit_extract(&p, 0, 32)/*low mantisa*/ != 0
+ || bit_extract(&p, 32, 20)/*high mantisa*/ != 0)));
+ else
+ val = 1;
+ return (val);
+}
+#else
+
+/* assumes the bytes have been swapped to local order */
+typedef union { double d;
+ float f;
+ struct { unsigned m:23, e:8, :1;} sf;
+ struct { unsigned lm; unsigned m:20, e:11, :1;} sd;
+ } float_type_u;
+
+int invalid_float(p, len)
+ register float_type_u *p;
+ register int len;
+{
+ register int val;
+ if ( len == sizeof (float) )
+ val = (p->sf.e == 0xff
+ || (p->sf.e == 0 && p->sf.m != 0));
+ else if ( len == sizeof (double) )
+ val = (p->sd.e == 0x7ff
+ || (p->sd.e == 0 && (p->sd.m != 0 || p->sd.lm != 0)));
+ else
+ val = 1;
+ return (val);
+}
+#endif
projects / binutils-gdb.git / commitdiff