Lots of changes from Jeff Law for HPPA support:

Clean up cruft in opcode table; improve opcodes library disassembler; make
gdb use opcodes library disassembler.

1 files changed, 623 insertions, 0 deletions

diff --git a/opcodes/hppa-dis.c b/opcodes/hppa-dis.c
new file mode 100644
index 0000000..115013c
--- /dev/null
+++ b/opcodes/hppa-dis.c
@@ -0,0 +1,623 @@
+/* Disassembler for the PA-RISC. Somewhat derived from sparc-pinsn.c.
+   Copyright 1989, 1990, 1992, 1993 Free Software Foundation, Inc.
+
+   Contributed by the Center for Software Science at the
+   University of Utah (pa-gdb-bugs@cs.utah.edu).
+
+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 "dis-asm.h"
+#include "sysdep.h"
+#include "opcode/hppa.h"
+
+/* Initializer for an array of names of registers.
+   There should be NUM_REGS strings in this initializer.  */
+
+#define REGISTER_NAMES  \
+ {"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", "r8", "r9",        \
+  "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", \
+  "r20", "r21", "r22", "arg3", "arg2", "arg1", "arg0", "dp", "ret0", "ret1", \
+  "sp", "r31", "sar", "pcoqh", "pcsqh", "pcoqt", "pcsqt", \
+  "eiem", "iir", "isr", "ior", "ipsw", "goto", "sr4", "sr0", "sr1", "sr2", \
+  "sr3", "sr5", "sr6", "sr7", "cr0", "cr8", "cr9", "ccr", "cr12", "cr13", \
+  "cr24", "cr25", "cr26", "mpsfu_high", "mpsfu_low", "mpsfu_ovflo", "pad", \
+  "fpsr", "fpe1", "fpe2", "fpe3", "fpe4", "fpe5", "fpe6", "fpe7", \
+  "fp4", "fp5", "fp6", "fp7", "fp8", \
+  "fp9", "fp10", "fp11", "fp12", "fp13", "fp14", "fp15", \
+  "fp16", "fp17", "fp18", "fp19", "fp20", "fp21", "fp22", "fp23", \
+  "fp24", "fp25", "fp26", "fp27", "fp28", "fp29", "fp30", "fp31"}
+
+static const char *const reg_names[] = REGISTER_NAMES;
+
+typedef unsigned int CORE_ADDR;
+
+/* Get at various relevent fields of an instruction word. */
+
+#define MASK_5 0x1f
+#define MASK_11 0x7ff
+#define MASK_14 0x3fff
+#define MASK_21 0x1fffff
+
+/* This macro gets bit fields using HP's numbering (MSB = 0) */
+
+#define GET_FIELD(X, FROM, TO) \
+  ((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
+
+/* Some of these have been converted to 2-d arrays because they
+   consume less storage this way.  If the maintenance becomes a
+   problem, convert them back to const 1-d pointer arrays.  */
+static const char control_reg[][6] = {
+  "rctr", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",
+  "pidr1", "pidr2", "ccr", "sar", "pidr3", "pidr4",
+  "iva", "eiem", "itmr", "pcsq", "pcoq", "iir", "isr",
+  "ior", "ipsw", "eirr", "tr0", "tr1", "tr2", "tr3",
+  "tr4", "tr5", "tr6", "tr7"
+};
+
+static const char compare_cond_names[][5] = {
+  "", ",=", ",<", ",<=", ",<<", ",<<=", ",sv",
+  ",od", ",tr", ",<>", ",>=", ",>", ",>>=",
+  ",>>", ",nsv", ",ev"
+};
+static const char add_cond_names[][5] = {
+  "", ",=", ",<", ",<=", ",nuv", ",znv", ",sv",
+  ",od", ",tr", ",<>", ",>=", ",>", ",uv",
+  ",vnz", ",nsv", ",ev"
+};
+static const char *const logical_cond_names[] = {
+  "", ",=", ",<", ",<=", 0, 0, 0, ",od",
+  ",tr", ",<>", ",>=", ",>", 0, 0, 0, ",ev"};
+static const char *const unit_cond_names[] = {
+  "", 0, ",sbz", ",shz", ",sdc", 0, ",sbc", ",shc",
+  ",tr", 0, ",nbz", ",nhz", ",ndc", 0, ",nbc", ",nhc"
+};
+static const char shift_cond_names[][4] = {
+  "", ",=", ",<", ",od", ",tr", ",<>", ",>=", ",ev"
+};
+static const char index_compl_names[][4] = {"", ",m", ",s", ",sm"};
+static const char short_ldst_compl_names[][4] = {"", ",ma", "", ",mb"};
+static const char *const short_bytes_compl_names[] = {
+  "", ",b,m", ",e", ",e,m"
+};
+static const char *const float_format_names[] = {",sgl", ",dbl", ",quad"};
+static const char float_comp_names[][8] =
+{
+  ",false?", ",false", ",?", ",!<=>", ",=", ",=t", ",?=", ",!<>",
+  ",!?>=", ",<", ",?<", ",!>=", ",!?>", ",<=", ",?<=", ",!>",
+  ",!?<=", ",>", ",?>", ",!<=", ",!?<", ",>=", ",?>=", ",!<",
+  ",!?=", ",<>", ",!=", ",!=t", ",!?", ",<=>", ",true?", ",true"
+};
+
+/* For a bunch of different instructions form an index into a 
+   completer name table. */
+#define GET_COMPL(insn) (GET_FIELD (insn, 26, 26) | \
+			 GET_FIELD (insn, 18, 18) << 1)
+
+#define GET_COND(insn) (GET_FIELD ((insn), 16, 18) + \
+			(GET_FIELD ((insn), 19, 19) ? 8 : 0))
+
+/* Utility function to print registers.  Put these first, so gcc's function
+   inlining can do its stuff.  */
+
+#define fputs_filtered(STR,F)	(*info->fprintf_func) (info->stream, "%s", STR)
+
+static void
+fput_reg (reg, info)
+     unsigned reg;
+     disassemble_info *info;
+{
+  (*info->fprintf_func) (info->stream, reg ? reg_names[reg] : "r0");
+}
+
+static void
+fput_reg_r (reg, info)
+     unsigned reg;
+     disassemble_info *info;
+{
+  (*info->fprintf_func) (info->stream, "%sR", reg ? reg_names[reg] : "r0");
+}
+
+static void
+fput_creg (reg, info)
+     unsigned reg;
+     disassemble_info *info;
+{
+  (*info->fprintf_func) (info->stream, control_reg[reg]);
+}
+
+/* print constants with sign */
+
+static void
+fput_const (num, info)
+     unsigned num;
+     disassemble_info *info;
+{
+  if ((int)num < 0)
+    (*info->fprintf_func) (info->stream, "-%x", -(int)num);
+  else
+    (*info->fprintf_func) (info->stream, "%x", num);
+}
+
+/* Routines to extract various sized constants out of hppa
+   instructions. */
+
+/* This assumes that no garbage lies outside of the lower bits of
+   value. */
+
+static int
+sign_extend (val, bits)
+     unsigned val, bits;
+{
+  return (int)(val >> (bits - 1) ? (-1 << bits) | val : val);
+}
+
+/* For many immediate values the sign bit is the low bit! */
+
+static int
+low_sign_extend (val, bits)
+     unsigned val, bits;
+{
+  return (int)((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1);
+}
+/* extract the immediate field from a ld{bhw}s instruction */
+
+#if 0 /* not used */
+static unsigned
+get_field (val, from, to)
+     unsigned val, from, to;
+{
+  val = val >> (31 - to);
+  return val & ((1 << (32 - from)) - 1);
+}
+
+static unsigned
+set_field (val, from, to, new_val)
+     unsigned *val, from, to, new_val;
+{
+  unsigned mask = ~((1 << (to - from + 1)) << (31 - from));
+  return *val = (*val & mask) | (new_val << (31 - from));
+}
+#endif
+
+/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
+static int
+extract_3 (word)
+     unsigned word;
+{
+  return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
+}
+
+static int
+extract_5_load (word)
+     unsigned word;
+{
+  return low_sign_extend (word >> 16 & MASK_5, 5);
+}
+
+/* extract the immediate field from a st{bhw}s instruction */
+static int
+extract_5_store (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_5, 5);
+}
+
+/* extract the immediate field from a break instruction */
+static unsigned
+extract_5r_store (word)
+     unsigned word;
+{
+  return (word & MASK_5);
+}
+
+/* extract the immediate field from a {sr}sm instruction */
+static unsigned
+extract_5R_store (word)
+     unsigned word;
+{
+  return (word >> 16 & MASK_5);
+}
+
+/* extract the immediate field from a bb instruction */
+static unsigned
+extract_5Q_store (word)
+     unsigned word;
+{
+  return (word >> 21 & MASK_5);
+}
+
+/* extract an 11 bit immediate field */
+static int
+extract_11 (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_11, 11);
+}
+
+/* extract a 14 bit immediate field */
+static int
+extract_14 (word)
+     unsigned word;
+{
+  return low_sign_extend (word & MASK_14, 14);
+}
+
+#if 0
+/* deposit a 14 bit constant in a word */
+static unsigned
+deposit_14 (opnd, word)
+     int opnd;
+     unsigned word;
+{
+  unsigned sign = (opnd < 0 ? 1 : 0);
+
+  return word | ((unsigned)opnd << 1 & MASK_14)  | sign;
+}
+#endif
+
+/* extract a 21 bit constant */
+
+static int
+extract_21 (word)
+     unsigned word;
+{
+  int val;
+
+  word &= MASK_21;
+  word <<= 11;
+  val = GET_FIELD (word, 20, 20);
+  val <<= 11;
+  val |= GET_FIELD (word, 9, 19);
+  val <<= 2;
+  val |= GET_FIELD (word, 5, 6);
+  val <<= 5;
+  val |= GET_FIELD (word, 0, 4);
+  val <<= 2;
+  val |= GET_FIELD (word, 7, 8);
+  return sign_extend (val, 21) << 11;
+}
+
+#if 0
+/* deposit a 21 bit constant in a word. Although 21 bit constants are
+   usually the top 21 bits of a 32 bit constant, we assume that only
+   the low 21 bits of opnd are relevant */
+
+static unsigned
+deposit_21 (opnd, word)
+     unsigned opnd, word;
+{
+  unsigned val = 0;
+
+  val |= GET_FIELD (opnd, 11 + 14, 11 + 18);
+  val <<= 2;
+  val |= GET_FIELD (opnd, 11 + 12, 11 + 13);
+  val <<= 2;
+  val |= GET_FIELD (opnd, 11 + 19, 11 + 20);
+  val <<= 11;
+  val |= GET_FIELD (opnd, 11 + 1, 11 + 11);
+  val <<= 1;
+  val |= GET_FIELD (opnd, 11 + 0, 11 + 0);
+  return word | val;
+}
+#endif
+
+/* extract a 12 bit constant from branch instructions */
+
+static int
+extract_12 (word)
+     unsigned word;
+{
+  return sign_extend (GET_FIELD (word, 19, 28) |
+                      GET_FIELD (word, 29, 29) << 10 |
+                      (word & 0x1) << 11, 12) << 2;
+}
+
+/* extract a 17 bit constant from branch instructions, returning the
+   19 bit signed value. */
+
+static int
+extract_17 (word)
+     unsigned word;
+{
+  return sign_extend (GET_FIELD (word, 19, 28) |
+                      GET_FIELD (word, 29, 29) << 10 |
+                      GET_FIELD (word, 11, 15) << 11 |
+                      (word & 0x1) << 16, 17) << 2;
+}
+
+/* Print one instruction.  */
+int
+print_insn_hppa (memaddr, info)
+     bfd_vma memaddr;
+     disassemble_info *info;
+{
+  unsigned int insn, i, op;
+  FILE *stream = info->stream;
+
+  {
+    int status =
+      (*info->read_memory_func) (memaddr, (bfd_byte*) &insn, sizeof (insn),
+				 info);
+    if (status != 0)
+      {
+	(*info->memory_error_func) (status, memaddr, info);
+	return -1;
+      }
+  }
+
+  for (i = 0; i < NUMOPCODES; ++i)
+    {
+      const struct pa_opcode *opcode = &pa_opcodes[i];
+      if ((insn & opcode->mask) == opcode->match)
+	{
+	  register const char *s;
+	  
+	  (*info->fprintf_func) (info->stream, "%s", opcode->name);
+
+	  if (!strchr ("cCY<?!@-+&U>~nZFIM", opcode->args[0]))
+	    (*info->fprintf_func) (info->stream, " ");
+	  for (s = opcode->args; *s != '\0'; ++s)
+	    {
+	      switch (*s)
+		{
+		case 'x':
+		  fput_reg (GET_FIELD (insn, 11, 15), info);
+		  break;
+		case 'X':
+                  if (GET_FIELD (insn, 25, 25))
+		      fput_reg_r (GET_FIELD (insn, 11, 15), info);
+		  else
+		      fput_reg (GET_FIELD (insn, 11, 15), info);
+		  break;
+		case 'b':
+		  fput_reg (GET_FIELD (insn, 6, 10), info);
+		  break;
+		case '^':
+		  fput_creg (GET_FIELD (insn, 6, 10), info);
+		  break;
+		case 'E':
+                  if (GET_FIELD (insn, 25, 25))
+		      fput_reg_r (GET_FIELD (insn, 6, 10), info);
+		  else
+		      fput_reg (GET_FIELD (insn, 6, 10), info);
+		  break;
+		case 't':
+		  fput_reg (GET_FIELD (insn, 27, 31), info);
+		  break;
+		case 'v':
+                  if (GET_FIELD (insn, 25, 25))
+		      fput_reg_r (GET_FIELD (insn, 27, 31), info);
+		  else
+		      fput_reg (GET_FIELD (insn, 27, 31), info);
+		  break;
+		case '4':
+		  fput_creg (GET_FIELD (insn, 6, 10), info);
+		  break;
+		case '6':
+		  fput_reg (GET_FIELD (insn, 11, 15), info);
+		  break;
+		case '7':
+		  fput_reg (GET_FIELD (insn, 27, 31), info);
+		  break;
+		case '8':
+		  fput_reg (GET_FIELD (insn, 16, 20), info);
+		  break;
+		case '9':
+		  fput_reg (GET_FIELD (insn, 21, 25), info);
+		  break;
+		case '5':
+		  fput_const (extract_5_load (insn), info);
+		  break;
+		case 's':
+		  fprintf_filtered (stream, "sr%d", GET_FIELD (insn, 16, 17));
+		  break;
+		case 'S':
+		  (*info->fprintf_func) (info->stream, "sr%d", extract_3 (insn));
+		  break;
+		case 'c':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    index_compl_names[GET_COMPL (insn)]);
+		  break;
+		case 'C':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    short_ldst_compl_names[GET_COMPL (insn)]);
+		  break;
+		case 'Y':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    short_bytes_compl_names[GET_COMPL (insn)]);
+		  break;
+		/* these four conditions are for the set of instructions
+		   which distinguish true/false conditions by opcode rather
+		   than by the 'f' bit (sigh): comb, comib, addb, addib */
+		case '<':
+		  fputs_filtered (compare_cond_names[GET_FIELD (insn, 16, 18)],
+				  info);
+		  break;
+		case '?':
+		  fputs_filtered (compare_cond_names[GET_FIELD (insn, 16, 18) + 8],
+				  info);
+		  break;
+		case '@':
+		  fputs_filtered (add_cond_names[GET_FIELD (insn, 16, 18) + 8],
+				  info);
+		  break;
+		case 'd':
+		  (*info->fprintf_func) (info->stream, "%s",
+				    compare_cond_names[GET_COND (insn)]);
+		  break;
+		case 'a':
+		case '!':
+		  (*info->fprintf_func) (info->stream, "%s",
+				    add_cond_names[GET_FIELD (insn, 16, 18)]);
+		  break;
+
+		case '&':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    logical_cond_names[GET_COND (insn)]);
+		  break;
+		case 'U':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    unit_cond_names[GET_COND (insn)]);
+		  break;
+		case '>':
+		case '~':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    shift_cond_names[GET_FIELD (insn, 16, 18)]);
+		  break;
+		case 'V':
+		  fput_const (extract_5_store (insn), info);
+		  break;
+		case 'R':
+		  fput_const (extract_5R_store (insn), info);
+		  break;
+		case 'Q':
+		  fput_const (extract_5Q_store (insn), info);
+		  break;
+		case 'i':
+		  fput_const (extract_11 (insn), info);
+		  break;
+		case 'j':
+		  fput_const (extract_14 (insn), info);
+		  break;
+		case 'k':
+		  fput_const (extract_21 (insn), info);
+		  break;
+		case 'n':
+		  if (insn & 0x2)
+		    (*info->fprintf_func) (info->stream, ",n ");
+		  else
+		    (*info->fprintf_func) (info->stream, " ");
+		  break;
+		case 'w':
+		  (*info->print_address_func) (memaddr + 8 + extract_12 (insn),
+					       info);
+		  break;
+		case 'W':
+		  /* don't interpret an address if it's an external branch
+		     instruction. */
+		  op = GET_FIELD (insn, 0, 5);
+		  if (op != 0x38 /* be */ && op != 0x39 /* ble */)
+		    (*info->print_address_func) ((memaddr + 8
+						  + extract_17 (insn)),
+						 info);
+		  else
+		    fput_const (extract_17 (insn), info);
+		  break;
+		case 'p':
+		  (*info->fprintf_func) (info->stream, "%d",
+				    31 - GET_FIELD (insn, 22, 26));
+		  break;
+		case 'P':
+		  (*info->fprintf_func) (info->stream, "%d",
+				    GET_FIELD (insn, 22, 26));
+		  break;
+		case 'T':
+		  (*info->fprintf_func) (info->stream, "%d",
+				    32 - GET_FIELD (insn, 27, 31));
+		  break;
+		case 'A':
+		  fput_const (GET_FIELD (insn, 6, 18), info);
+		  break;
+		case 'Z':
+		  if (GET_FIELD (insn, 26, 26))
+		    (*info->fprintf_func) (info->stream, ",m ");
+		  else
+		    (*info->fprintf_func) (info->stream, " ");
+		  break;
+		case 'D':
+		  fput_const (GET_FIELD (insn, 6, 31), info);
+		  break;
+		case 'f':
+		  (*info->fprintf_func) (info->stream, ",%d", GET_FIELD (insn, 23, 25));
+		  break;
+		case 'O':
+		  fput_const ((GET_FIELD (insn, 6,20) << 5 |
+			       GET_FIELD (insn, 27, 31)), info);
+		  break;
+		case 'o':
+		  fput_const (GET_FIELD (insn, 6, 20), info);
+		  break;
+		case '2':
+		  fput_const ((GET_FIELD (insn, 6, 22) << 5 |
+			       GET_FIELD (insn, 27, 31)), info);
+		  break;
+		case '1':
+		  fput_const ((GET_FIELD (insn, 11, 20) << 5 |
+			       GET_FIELD (insn, 27, 31)), info);
+		  break;
+		case '0':
+		  fput_const ((GET_FIELD (insn, 16, 20) << 5 |
+			       GET_FIELD (insn, 27, 31)), info);
+		  break;
+		case 'u':
+		  (*info->fprintf_func) (info->stream, "%d", GET_FIELD (insn, 23, 25));
+		  break;
+		case 'F':
+		  /* if no destination completer, need a space here */
+		  if (GET_FIELD (insn, 21, 22) == 1)
+		    fputs_filtered (float_format_names[GET_FIELD (insn, 19, 20)],
+				    info);
+		  else
+		    (*info->fprintf_func) (info->stream, "%s ",
+				      float_format_names[GET_FIELD
+							 (insn, 19, 20)]);
+		  break;
+		case 'G':
+		  (*info->fprintf_func) (info->stream, "%s ",
+				    float_format_names[GET_FIELD (insn,
+								  17, 18)]);
+		  break;
+		case 'H':
+		    fputs_filtered (float_format_names[GET_FIELD 
+                                                      (insn, 26, 26)], info);
+		  break;
+		case 'I':
+		  /* if no destination completer, need a space here */
+		  if (GET_FIELD (insn, 21, 22) == 1)
+		    fputs_filtered (float_format_names[GET_FIELD (insn, 20, 20)],
+				    info);
+		  else
+		    fprintf_filtered (stream, "%s ",
+				      float_format_names[GET_FIELD
+							 (insn, 20, 20)]);
+		  break;
+		case 'J':
+                  if (GET_FIELD (insn, 24, 24))
+		      fput_reg_r (GET_FIELD (insn, 6, 10), info);
+		  else
+		      fput_reg (GET_FIELD (insn, 6, 10), info);
+		      
+		  break;
+		case 'K':
+                  if (GET_FIELD (insn, 19, 19))
+		      fput_reg_r (GET_FIELD (insn, 11, 15), info);
+		  else
+		      fput_reg (GET_FIELD (insn, 11, 15), info);
+		  break;
+		case 'M':
+		  fputs_filtered (float_comp_names[GET_FIELD (insn, 27, 31)],
+				  info);
+		  break;
+		default:
+		  (*info->fprintf_func) (info->stream, "%c", *s);
+		  break;
+		}
+	    }
+	  return sizeof(insn);
+	}
+    }
+  (*info->fprintf_func) (info->stream, "#%8x", insn);
+  return sizeof(insn);
+}