19990502 sourceware importbinu_ss_19990502

1 files changed, 969 insertions, 0 deletions

diff --git a/opcodes/sparc-dis.c b/opcodes/sparc-dis.c
new file mode 100644
index 00000000000..0975b280e28
--- /dev/null
+++ b/opcodes/sparc-dis.c
@@ -0,0 +1,969 @@
+/* Print SPARC instructions.
+   Copyright (C) 1989, 91-97, 1998 Free Software Foundation, Inc.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <stdio.h>
+
+#include "ansidecl.h"
+#include "sysdep.h"
+#include "opcode/sparc.h"
+#include "dis-asm.h"
+#include "libiberty.h"
+#include "opintl.h"
+
+/* Bitmask of v9 architectures.  */
+#define MASK_V9 ((1 << SPARC_OPCODE_ARCH_V9) \
+		 | (1 << SPARC_OPCODE_ARCH_V9A))
+/* 1 if INSN is for v9 only.  */
+#define V9_ONLY_P(insn) (! ((insn)->architecture & ~MASK_V9))
+/* 1 if INSN is for v9.  */
+#define V9_P(insn) (((insn)->architecture & MASK_V9) != 0)
+
+/* The sorted opcode table.  */
+static const struct sparc_opcode **sorted_opcodes;
+
+/* For faster lookup, after insns are sorted they are hashed.  */
+/* ??? I think there is room for even more improvement.  */
+
+#define HASH_SIZE 256
+/* It is important that we only look at insn code bits as that is how the
+   opcode table is hashed.  OPCODE_BITS is a table of valid bits for each
+   of the main types (0,1,2,3).  */
+static int opcode_bits[4] = { 0x01c00000, 0x0, 0x01f80000, 0x01f80000 };
+#define HASH_INSN(INSN) \
+  ((((INSN) >> 24) & 0xc0) | (((INSN) & opcode_bits[((INSN) >> 30) & 3]) >> 19))
+struct opcode_hash {
+  struct opcode_hash *next;
+  const struct sparc_opcode *opcode;
+};
+static struct opcode_hash *opcode_hash_table[HASH_SIZE];
+
+static void build_hash_table
+  PARAMS ((const struct sparc_opcode **, struct opcode_hash **, int));
+static int is_delayed_branch PARAMS ((unsigned long));
+static int compare_opcodes PARAMS ((const PTR, const PTR));
+static int compute_arch_mask PARAMS ((unsigned long));
+
+/* Sign-extend a value which is N bits long.  */
+#define	SEX(value, bits) \
+	((((int)(value)) << ((8 * sizeof (int)) - bits))	\
+			 >> ((8 * sizeof (int)) - bits) )
+
+static  char *reg_names[] =
+{ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",	
+  "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",	
+  "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",	
+  "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7",	
+  "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",	
+  "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",	
+  "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+  "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
+  "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",	
+  "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",	
+  "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
+  "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
+/* psr, wim, tbr, fpsr, cpsr are v8 only.  */
+  "y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr"
+};
+
+#define	freg_names	(&reg_names[4 * 8])
+
+/* These are ordered according to there register number in
+   rdpr and wrpr insns.  */
+static char *v9_priv_reg_names[] =
+{
+  "tpc", "tnpc", "tstate", "tt", "tick", "tba", "pstate", "tl",
+  "pil", "cwp", "cansave", "canrestore", "cleanwin", "otherwin",
+  "wstate", "fq"
+  /* "ver" - special cased */
+};
+
+/* These are ordered according to there register number in
+   rd and wr insns (-16).  */
+static char *v9a_asr_reg_names[] =
+{
+  "pcr", "pic", "dcr", "gsr", "set_softint", "clear_softint",
+  "softint", "tick_cmpr"
+};
+
+/* Macros used to extract instruction fields.  Not all fields have
+   macros defined here, only those which are actually used.  */
+
+#define X_RD(i) (((i) >> 25) & 0x1f)
+#define X_RS1(i) (((i) >> 14) & 0x1f)
+#define X_LDST_I(i) (((i) >> 13) & 1)
+#define X_ASI(i) (((i) >> 5) & 0xff)
+#define X_RS2(i) (((i) >> 0) & 0x1f)
+#define X_IMM(i,n) (((i) >> 0) & ((1 << (n)) - 1))
+#define X_SIMM(i,n) SEX (X_IMM ((i), (n)), (n))
+#define X_DISP22(i) (((i) >> 0) & 0x3fffff)
+#define X_IMM22(i) X_DISP22 (i)
+#define X_DISP30(i) (((i) >> 0) & 0x3fffffff)
+
+/* These are for v9.  */
+#define X_DISP16(i) (((((i) >> 20) & 3) << 14) | (((i) >> 0) & 0x3fff))
+#define X_DISP19(i) (((i) >> 0) & 0x7ffff)
+#define X_MEMBAR(i) ((i) & 0x7f)
+
+/* Here is the union which was used to extract instruction fields
+   before the shift and mask macros were written.
+
+   union sparc_insn
+     {
+       unsigned long int code;
+       struct
+	 {
+	   unsigned int anop:2;
+	   #define	op	ldst.anop
+	   unsigned int anrd:5;
+	   #define	rd	ldst.anrd
+	   unsigned int op3:6;
+	   unsigned int anrs1:5;
+	   #define	rs1	ldst.anrs1
+	   unsigned int i:1;
+	   unsigned int anasi:8;
+	   #define	asi	ldst.anasi
+	   unsigned int anrs2:5;
+	   #define	rs2	ldst.anrs2
+	   #define	shcnt	rs2
+	 } ldst;
+       struct
+	 {
+	   unsigned int anop:2, anrd:5, op3:6, anrs1:5, i:1;
+	   unsigned int IMM13:13;
+	   #define	imm13	IMM13.IMM13
+	 } IMM13;
+       struct
+	 {
+	   unsigned int anop:2;
+	   unsigned int a:1;
+	   unsigned int cond:4;
+	   unsigned int op2:3;
+	   unsigned int DISP22:22;
+	   #define	disp22	branch.DISP22
+	   #define	imm22	disp22
+	 } branch;
+       struct
+	 {
+	   unsigned int anop:2;
+	   unsigned int a:1;
+	   unsigned int z:1;
+	   unsigned int rcond:3;
+	   unsigned int op2:3;
+	   unsigned int DISP16HI:2;
+	   unsigned int p:1;
+	   unsigned int _rs1:5;
+	   unsigned int DISP16LO:14;
+	 } branch16;
+       struct
+	 {
+	   unsigned int anop:2;
+	   unsigned int adisp30:30;
+	   #define	disp30	call.adisp30
+	 } call;
+     };
+
+   */
+
+/* Nonzero if INSN is the opcode for a delayed branch.  */
+static int
+is_delayed_branch (insn)
+     unsigned long insn;
+{
+  struct opcode_hash *op;
+
+  for (op = opcode_hash_table[HASH_INSN (insn)]; op; op = op->next)
+    {
+      CONST struct sparc_opcode *opcode = op->opcode;
+      if ((opcode->match & insn) == opcode->match
+	  && (opcode->lose & insn) == 0)
+	return (opcode->flags & F_DELAYED);
+    }
+  return 0;
+}
+
+/* extern void qsort (); */
+
+/* Records current mask of SPARC_OPCODE_ARCH_FOO values, used to pass value
+   to compare_opcodes.  */
+static unsigned int current_arch_mask;
+
+/* Print one instruction from MEMADDR on INFO->STREAM.
+
+   We suffix the instruction with a comment that gives the absolute
+   address involved, as well as its symbolic form, if the instruction
+   is preceded by a findable `sethi' and it either adds an immediate
+   displacement to that register, or it is an `add' or `or' instruction
+   on that register.  */
+
+int
+print_insn_sparc (memaddr, info)
+     bfd_vma memaddr;
+     disassemble_info *info;
+{
+  FILE *stream = info->stream;
+  bfd_byte buffer[4];
+  unsigned long insn;
+  register struct opcode_hash *op;
+  /* Nonzero of opcode table has been initialized.  */
+  static int opcodes_initialized = 0;
+  /* bfd mach number of last call.  */
+  static unsigned long current_mach = 0;
+  bfd_vma (*getword) PARAMS ((const unsigned char *));
+
+  if (!opcodes_initialized
+      || info->mach != current_mach)
+    {
+      int i;
+
+      current_arch_mask = compute_arch_mask (info->mach);
+
+      if (!opcodes_initialized)
+	sorted_opcodes = (const struct sparc_opcode **)
+	  xmalloc (sparc_num_opcodes * sizeof (struct sparc_opcode *));
+      /* Reset the sorted table so we can resort it.  */
+      for (i = 0; i < sparc_num_opcodes; ++i)
+	sorted_opcodes[i] = &sparc_opcodes[i];
+      qsort ((char *) sorted_opcodes, sparc_num_opcodes,
+	     sizeof (sorted_opcodes[0]), compare_opcodes);
+
+      build_hash_table (sorted_opcodes, opcode_hash_table, sparc_num_opcodes);
+      current_mach = info->mach;
+      opcodes_initialized = 1;
+    }
+
+  {
+    int status =
+      (*info->read_memory_func) (memaddr, buffer, sizeof (buffer), info);
+    if (status != 0)
+      {
+	(*info->memory_error_func) (status, memaddr, info);
+	return -1;
+      }
+  }
+
+  /* On SPARClite variants such as DANlite (sparc86x), instructions
+     are always big-endian even when the machine is in little-endian mode. */
+  if (info->endian == BFD_ENDIAN_BIG || info->mach == bfd_mach_sparc_sparclite)
+    getword = bfd_getb32;
+  else
+    getword = bfd_getl32;
+
+  insn = getword (buffer);
+
+  info->insn_info_valid = 1;			/* We do return this info */
+  info->insn_type = dis_nonbranch;		/* Assume non branch insn */
+  info->branch_delay_insns = 0;			/* Assume no delay */
+  info->target = 0;				/* Assume no target known */
+
+  for (op = opcode_hash_table[HASH_INSN (insn)]; op; op = op->next)
+    {
+      CONST struct sparc_opcode *opcode = op->opcode;
+
+      /* If the insn isn't supported by the current architecture, skip it.  */
+      if (! (opcode->architecture & current_arch_mask))
+	continue;
+
+      if ((opcode->match & insn) == opcode->match
+	  && (opcode->lose & insn) == 0)
+	{
+	  /* Nonzero means that we have found an instruction which has
+	     the effect of adding or or'ing the imm13 field to rs1.  */
+	  int imm_added_to_rs1 = 0;
+
+	  /* Nonzero means that we have found a plus sign in the args
+	     field of the opcode table.  */
+	  int found_plus = 0;
+	  
+	  /* Nonzero means we have an annulled branch.  */
+	  int is_annulled = 0;
+
+	  /* Do we have an `add' or `or' instruction combining an
+             immediate with rs1?  */
+	  if (opcode->match == 0x80102000 || opcode->match == 0x80002000)
+	  /*			  (or)				 (add)  */
+	    imm_added_to_rs1 = 1;
+
+	  if (X_RS1 (insn) != X_RD (insn)
+	      && strchr (opcode->args, 'r') != 0)
+	      /* Can't do simple format if source and dest are different.  */
+	      continue;
+	  if (X_RS2 (insn) != X_RD (insn)
+	      && strchr (opcode->args, 'O') != 0)
+	      /* Can't do simple format if source and dest are different.  */
+	      continue;
+
+	  (*info->fprintf_func) (stream, opcode->name);
+
+	  {
+	    register CONST char *s;
+
+	    if (opcode->args[0] != ',')
+	      (*info->fprintf_func) (stream, " ");
+	    for (s = opcode->args; *s != '\0'; ++s)
+	      {
+		while (*s == ',')
+		  {
+		    (*info->fprintf_func) (stream, ",");
+		    ++s;
+		    switch (*s) {
+		    case 'a':
+		      (*info->fprintf_func) (stream, "a");
+		      is_annulled = 1;
+		      ++s;
+		      continue;
+		    case 'N':
+		      (*info->fprintf_func) (stream, "pn");
+		      ++s;
+		      continue;
+
+		    case 'T':
+		      (*info->fprintf_func) (stream, "pt");
+		      ++s;
+		      continue;
+
+		    default:
+		      break;
+		    }		/* switch on arg */
+		  }		/* while there are comma started args */
+
+		(*info->fprintf_func) (stream, " ");
+			
+		switch (*s)
+		  {
+		  case '+':
+		    found_plus = 1;
+
+		    /* note fall-through */
+		  default:
+		    (*info->fprintf_func) (stream, "%c", *s);
+		    break;
+
+		  case '#':
+		    (*info->fprintf_func) (stream, "0");
+		    break;
+
+#define	reg(n)	(*info->fprintf_func) (stream, "%%%s", reg_names[n])
+		  case '1':
+		  case 'r':
+		    reg (X_RS1 (insn));
+		    break;
+
+		  case '2':
+		  case 'O':
+		    reg (X_RS2 (insn));
+		    break;
+
+		  case 'd':
+		    reg (X_RD (insn));
+		    break;
+#undef	reg
+
+#define	freg(n)		(*info->fprintf_func) (stream, "%%%s", freg_names[n])
+#define	fregx(n)	(*info->fprintf_func) (stream, "%%%s", freg_names[((n) & ~1) | (((n) & 1) << 5)])
+		  case 'e':
+		    freg (X_RS1 (insn));
+		    break;
+		  case 'v':	/* double/even */
+		  case 'V':	/* quad/multiple of 4 */
+		    fregx (X_RS1 (insn));
+		    break;
+
+		  case 'f':
+		    freg (X_RS2 (insn));
+		    break;
+		  case 'B':	/* double/even */
+		  case 'R':	/* quad/multiple of 4 */
+		    fregx (X_RS2 (insn));
+		    break;
+
+		  case 'g':
+		    freg (X_RD (insn));
+		    break;
+		  case 'H':	/* double/even */
+		  case 'J':	/* quad/multiple of 4 */
+		    fregx (X_RD (insn));
+		    break;
+#undef	freg
+#undef	fregx
+
+#define	creg(n)	(*info->fprintf_func) (stream, "%%c%u", (unsigned int) (n))
+		  case 'b':
+		    creg (X_RS1 (insn));
+		    break;
+
+		  case 'c':
+		    creg (X_RS2 (insn));
+		    break;
+
+		  case 'D':
+		    creg (X_RD (insn));
+		    break;
+#undef	creg
+
+		  case 'h':
+		    (*info->fprintf_func) (stream, "%%hi(%#x)",
+					   (0xFFFFFFFF
+					    & ((int) X_IMM22 (insn) << 10)));
+		    break;
+
+		  case 'i':	/* 13 bit immediate */
+		  case 'I':	/* 11 bit immediate */
+		  case 'j':	/* 10 bit immediate */
+		    {
+		      int imm;
+
+		      if (*s == 'i')
+		        imm = X_SIMM (insn, 13);
+		      else if (*s == 'I')
+			imm = X_SIMM (insn, 11);
+		      else
+			imm = X_SIMM (insn, 10);
+
+		      /* Check to see whether we have a 1+i, and take
+			 note of that fact.
+
+			 Note: because of the way we sort the table,
+			 we will be matching 1+i rather than i+1,
+			 so it is OK to assume that i is after +,
+			 not before it.  */
+		      if (found_plus)
+			imm_added_to_rs1 = 1;
+		      
+		      if (imm <= 9)
+			(*info->fprintf_func) (stream, "%d", imm);
+		      else
+			(*info->fprintf_func) (stream, "%#x", imm);
+		    }
+		    break;
+
+		  case 'X':	/* 5 bit unsigned immediate */
+		  case 'Y':	/* 6 bit unsigned immediate */
+		    {
+		      int imm = X_IMM (insn, *s == 'X' ? 5 : 6);
+
+		      if (imm <= 9)
+			(info->fprintf_func) (stream, "%d", imm);
+		      else
+			(info->fprintf_func) (stream, "%#x", (unsigned) imm);
+		    }
+		    break;
+
+		  case 'K':
+		    {
+		      int mask = X_MEMBAR (insn);
+		      int bit = 0x40, printed_one = 0;
+		      const char *name;
+
+		      if (mask == 0)
+			(info->fprintf_func) (stream, "0");
+		      else
+			while (bit)
+			  {
+			    if (mask & bit)
+			      {
+				if (printed_one)
+				  (info->fprintf_func) (stream, "|");
+				name = sparc_decode_membar (bit);
+				(info->fprintf_func) (stream, "%s", name);
+				printed_one = 1;
+			      }
+			    bit >>= 1;
+			  }
+		      break;
+		    }
+
+		  case 'k':
+		    info->target = memaddr + SEX (X_DISP16 (insn), 16) * 4;
+		    (*info->print_address_func) (info->target, info);
+		    break;
+
+		  case 'G':
+		    info->target = memaddr + SEX (X_DISP19 (insn), 19) * 4;
+		    (*info->print_address_func) (info->target, info);
+		    break;
+
+		  case '6':
+		  case '7':
+		  case '8':
+		  case '9':
+		    (*info->fprintf_func) (stream, "%%fcc%c", *s - '6' + '0');
+		    break;
+
+		  case 'z':
+		    (*info->fprintf_func) (stream, "%%icc");
+		    break;
+
+		  case 'Z':
+		    (*info->fprintf_func) (stream, "%%xcc");
+		    break;
+
+		  case 'E':
+		    (*info->fprintf_func) (stream, "%%ccr");
+		    break;
+
+		  case 's':
+		    (*info->fprintf_func) (stream, "%%fprs");
+		    break;
+
+		  case 'o':
+		    (*info->fprintf_func) (stream, "%%asi");
+		    break;
+		    
+		  case 'W':
+		    (*info->fprintf_func) (stream, "%%tick");
+		    break;
+
+		  case 'P':
+		    (*info->fprintf_func) (stream, "%%pc");
+		    break;
+
+		  case '?':
+		    if (X_RS1 (insn) == 31)
+		      (*info->fprintf_func) (stream, "%%ver");
+		    else if ((unsigned) X_RS1 (insn) < 16)
+		      (*info->fprintf_func) (stream, "%%%s",
+					     v9_priv_reg_names[X_RS1 (insn)]);
+		    else
+		      (*info->fprintf_func) (stream, "%%reserved");
+		    break;
+
+		  case '!':
+		    if ((unsigned) X_RD (insn) < 15)
+		      (*info->fprintf_func) (stream, "%%%s",
+					     v9_priv_reg_names[X_RD (insn)]);
+		    else
+		      (*info->fprintf_func) (stream, "%%reserved");
+		    break;
+
+		  case '/':
+		    if (X_RS1 (insn) < 16 || X_RS1 (insn) > 23)
+		      (*info->fprintf_func) (stream, "%%reserved");
+		    else
+		      (*info->fprintf_func) (stream, "%%%s",
+					     v9a_asr_reg_names[X_RS1 (insn)-16]);
+		    break;
+
+		  case '_':
+		    if (X_RD (insn) < 16 || X_RD (insn) > 23)
+		      (*info->fprintf_func) (stream, "%%reserved");
+		    else
+		      (*info->fprintf_func) (stream, "%%%s",
+					     v9a_asr_reg_names[X_RD (insn)-16]);
+		    break;
+
+		  case '*':
+		    {
+		      const char *name = sparc_decode_prefetch (X_RD (insn));
+
+		      if (name)
+			(*info->fprintf_func) (stream, "%s", name);
+		      else
+			(*info->fprintf_func) (stream, "%d", X_RD (insn));
+		      break;
+		    }
+		    
+		  case 'M':
+		    (*info->fprintf_func) (stream, "%%asr%d", X_RS1 (insn));
+		    break;
+		    
+		  case 'm':
+		    (*info->fprintf_func) (stream, "%%asr%d", X_RD (insn));
+		    break;
+		    
+		  case 'L':
+		    info->target = memaddr + SEX (X_DISP30 (insn), 30) * 4;
+		    (*info->print_address_func) (info->target, info);
+		    break;
+
+		  case 'n':
+		    (*info->fprintf_func)
+		      (stream, "%#x", SEX (X_DISP22 (insn), 22));
+		    break;
+
+		  case 'l':
+		    info->target = memaddr + SEX (X_DISP22 (insn), 22) * 4;
+		    (*info->print_address_func) (info->target, info);
+		    break;
+
+		  case 'A':
+		    {
+		      const char *name = sparc_decode_asi (X_ASI (insn));
+
+		      if (name)
+			(*info->fprintf_func) (stream, "%s", name);
+		      else
+			(*info->fprintf_func) (stream, "(%d)", X_ASI (insn));
+		      break;
+		    }
+
+		  case 'C':
+		    (*info->fprintf_func) (stream, "%%csr");
+		    break;
+
+		  case 'F':
+		    (*info->fprintf_func) (stream, "%%fsr");
+		    break;
+
+		  case 'p':
+		    (*info->fprintf_func) (stream, "%%psr");
+		    break;
+
+		  case 'q':
+		    (*info->fprintf_func) (stream, "%%fq");
+		    break;
+
+		  case 'Q':
+		    (*info->fprintf_func) (stream, "%%cq");
+		    break;
+
+		  case 't':
+		    (*info->fprintf_func) (stream, "%%tbr");
+		    break;
+
+		  case 'w':
+		    (*info->fprintf_func) (stream, "%%wim");
+		    break;
+
+		  case 'x':
+		    (*info->fprintf_func) (stream, "%d",
+					   ((X_LDST_I (insn) << 8)
+					    + X_ASI (insn)));
+		    break;
+
+		  case 'y':
+		    (*info->fprintf_func) (stream, "%%y");
+		    break;
+
+		  case 'u':
+		  case 'U':
+		    {
+		      int val = *s == 'U' ? X_RS1 (insn) : X_RD (insn);
+		      const char *name = sparc_decode_sparclet_cpreg (val);
+
+		      if (name)
+			(*info->fprintf_func) (stream, "%s", name);
+		      else
+			(*info->fprintf_func) (stream, "%%cpreg(%d)", val);
+		      break;
+		    }
+		  }
+	      }
+	  }
+
+	  /* If we are adding or or'ing something to rs1, then
+	     check to see whether the previous instruction was
+	     a sethi to the same register as in the sethi.
+	     If so, attempt to print the result of the add or
+	     or (in this context add and or do the same thing)
+	     and its symbolic value.  */
+	  if (imm_added_to_rs1)
+	    {
+	      unsigned long prev_insn;
+	      int errcode;
+
+	      errcode =
+		(*info->read_memory_func)
+		  (memaddr - 4, buffer, sizeof (buffer), info);
+	      prev_insn = getword (buffer);
+
+	      if (errcode == 0)
+		{
+		  /* If it is a delayed branch, we need to look at the
+		     instruction before the delayed branch.  This handles
+		     sequences such as
+
+		     sethi %o1, %hi(_foo), %o1
+		     call _printf
+		     or %o1, %lo(_foo), %o1
+		     */
+
+		  if (is_delayed_branch (prev_insn))
+		    {
+		      errcode = (*info->read_memory_func)
+			(memaddr - 8, buffer, sizeof (buffer), info);
+		      prev_insn = getword (buffer);
+		    }
+		}
+
+	      /* If there was a problem reading memory, then assume
+		 the previous instruction was not sethi.  */
+	      if (errcode == 0)
+		{
+		  /* Is it sethi to the same register?  */
+		  if ((prev_insn & 0xc1c00000) == 0x01000000
+		      && X_RD (prev_insn) == X_RS1 (insn))
+		    {
+		      (*info->fprintf_func) (stream, "\t! ");
+		      info->target = 
+			(0xFFFFFFFF & (int) X_IMM22 (prev_insn) << 10)
+			| X_SIMM (insn, 13);
+		      (*info->print_address_func) (info->target, info);
+		      info->insn_type = dis_dref;
+		      info->data_size = 4;  /* FIXME!!! */
+		    }
+		}
+	    }
+
+	  if (opcode->flags & (F_UNBR|F_CONDBR|F_JSR))
+	    {
+		/* FIXME -- check is_annulled flag */
+	      if (opcode->flags & F_UNBR)
+		info->insn_type = dis_branch;
+	      if (opcode->flags & F_CONDBR)
+		info->insn_type = dis_condbranch;
+	      if (opcode->flags & F_JSR)
+		info->insn_type = dis_jsr;
+	      if (opcode->flags & F_DELAYED)
+		info->branch_delay_insns = 1;
+	    }
+
+	  return sizeof (buffer);
+	}
+    }
+
+  info->insn_type = dis_noninsn;	/* Mark as non-valid instruction */
+  (*info->fprintf_func) (stream, _("unknown"));
+  return sizeof (buffer);
+}
+
+/* Given BFD mach number, return a mask of SPARC_OPCODE_ARCH_FOO values.  */
+
+static int
+compute_arch_mask (mach)
+     unsigned long mach;
+{
+  switch (mach)
+    {
+    case 0 :
+    case bfd_mach_sparc :
+      return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V8);
+    case bfd_mach_sparc_sparclet :
+      return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_SPARCLET);
+    case bfd_mach_sparc_sparclite :
+    case bfd_mach_sparc_sparclite_le :
+      /* sparclites insns are recognized by default (because that's how
+	 they've always been treated, for better or worse).  Kludge this by
+	 indicating generic v8 is also selected.  */
+      return (SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_SPARCLITE)
+	      | SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V8));
+    case bfd_mach_sparc_v8plus :
+    case bfd_mach_sparc_v9 :
+      return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V9);
+    case bfd_mach_sparc_v8plusa :
+    case bfd_mach_sparc_v9a :
+      return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V9A);
+    }
+  abort ();
+}
+
+/* Compare opcodes A and B.  */
+
+static int
+compare_opcodes (a, b)
+     const PTR a;
+     const PTR b;
+{
+  struct sparc_opcode *op0 = * (struct sparc_opcode **) a;
+  struct sparc_opcode *op1 = * (struct sparc_opcode **) b;
+  unsigned long int match0 = op0->match, match1 = op1->match;
+  unsigned long int lose0 = op0->lose, lose1 = op1->lose;
+  register unsigned int i;
+
+  /* If one (and only one) insn isn't supported by the current architecture,
+     prefer the one that is.  If neither are supported, but they're both for
+     the same architecture, continue processing.  Otherwise (both unsupported
+     and for different architectures), prefer lower numbered arch's (fudged
+     by comparing the bitmasks).  */
+  if (op0->architecture & current_arch_mask)
+    {
+      if (! (op1->architecture & current_arch_mask))
+	return -1;
+    }
+  else
+    {
+      if (op1->architecture & current_arch_mask)
+	return 1;
+      else if (op0->architecture != op1->architecture)
+	return op0->architecture - op1->architecture;
+    }
+
+  /* If a bit is set in both match and lose, there is something
+     wrong with the opcode table.  */
+  if (match0 & lose0)
+    {
+      fprintf
+	(stderr,
+	 /* xgettext:c-format */
+	 _("Internal error:  bad sparc-opcode.h: \"%s\", %#.8lx, %#.8lx\n"),
+	 op0->name, match0, lose0);
+      op0->lose &= ~op0->match;
+      lose0 = op0->lose;
+    }
+
+  if (match1 & lose1)
+    {
+      fprintf
+	(stderr,
+	 /* xgettext:c-format */
+	 _("Internal error: bad sparc-opcode.h: \"%s\", %#.8lx, %#.8lx\n"),
+	 op1->name, match1, lose1);
+      op1->lose &= ~op1->match;
+      lose1 = op1->lose;
+    }
+
+  /* Because the bits that are variable in one opcode are constant in
+     another, it is important to order the opcodes in the right order.  */
+  for (i = 0; i < 32; ++i)
+    {
+      unsigned long int x = 1 << i;
+      int x0 = (match0 & x) != 0;
+      int x1 = (match1 & x) != 0;
+
+      if (x0 != x1)
+	return x1 - x0;
+    }
+
+  for (i = 0; i < 32; ++i)
+    {
+      unsigned long int x = 1 << i;
+      int x0 = (lose0 & x) != 0;
+      int x1 = (lose1 & x) != 0;
+
+      if (x0 != x1)
+	return x1 - x0;
+    }
+
+  /* They are functionally equal.  So as long as the opcode table is
+     valid, we can put whichever one first we want, on aesthetic grounds.  */
+
+  /* Our first aesthetic ground is that aliases defer to real insns.  */
+  {
+    int alias_diff = (op0->flags & F_ALIAS) - (op1->flags & F_ALIAS);
+    if (alias_diff != 0)
+      /* Put the one that isn't an alias first.  */
+      return alias_diff;
+  }
+
+  /* Except for aliases, two "identical" instructions had
+     better have the same opcode.  This is a sanity check on the table.  */
+  i = strcmp (op0->name, op1->name);
+  if (i)
+    {
+      if (op0->flags & F_ALIAS) /* If they're both aliases, be arbitrary. */
+	return i;
+      else
+	fprintf (stderr,
+		 /* xgettext:c-format */
+		 _("Internal error: bad sparc-opcode.h: \"%s\" == \"%s\"\n"),
+		 op0->name, op1->name);
+    }
+
+  /* Fewer arguments are preferred.  */
+  {
+    int length_diff = strlen (op0->args) - strlen (op1->args);
+    if (length_diff != 0)
+      /* Put the one with fewer arguments first.  */
+      return length_diff;
+  }
+
+  /* Put 1+i before i+1.  */
+  {
+    char *p0 = (char *) strchr (op0->args, '+');
+    char *p1 = (char *) strchr (op1->args, '+');
+
+    if (p0 && p1)
+      {
+	/* There is a plus in both operands.  Note that a plus
+	   sign cannot be the first character in args,
+	   so the following [-1]'s are valid.  */
+	if (p0[-1] == 'i' && p1[1] == 'i')
+	  /* op0 is i+1 and op1 is 1+i, so op1 goes first.  */
+	  return 1;
+	if (p0[1] == 'i' && p1[-1] == 'i')
+	  /* op0 is 1+i and op1 is i+1, so op0 goes first.  */
+	  return -1;
+      }
+  }
+
+  /* Put 1,i before i,1.  */
+  {
+    int i0 = strncmp (op0->args, "i,1", 3) == 0;
+    int i1 = strncmp (op1->args, "i,1", 3) == 0;
+
+    if (i0 ^ i1)
+      return i0 - i1;
+  }
+
+  /* They are, as far as we can tell, identical.
+     Since qsort may have rearranged the table partially, there is
+     no way to tell which one was first in the opcode table as
+     written, so just say there are equal.  */
+  /* ??? This is no longer true now that we sort a vector of pointers,
+     not the table itself.  */
+  return 0;
+}
+
+/* Build a hash table from the opcode table.
+   OPCODE_TABLE is a sorted list of pointers into the opcode table.  */
+
+static void
+build_hash_table (opcode_table, hash_table, num_opcodes)
+     const struct sparc_opcode **opcode_table;
+     struct opcode_hash **hash_table;
+     int num_opcodes;
+{
+  register int i;
+  int hash_count[HASH_SIZE];
+  static struct opcode_hash *hash_buf = NULL;
+
+  /* Start at the end of the table and work backwards so that each
+     chain is sorted.  */
+
+  memset (hash_table, 0, HASH_SIZE * sizeof (hash_table[0]));
+  memset (hash_count, 0, HASH_SIZE * sizeof (hash_count[0]));
+  if (hash_buf != NULL)
+    free (hash_buf);
+  hash_buf = (struct opcode_hash *) xmalloc (sizeof (struct opcode_hash) * num_opcodes);
+  for (i = num_opcodes - 1; i >= 0; --i)
+    {
+      register int hash = HASH_INSN (opcode_table[i]->match);
+      register struct opcode_hash *h = &hash_buf[i];
+      h->next = hash_table[hash];
+      h->opcode = opcode_table[i];
+      hash_table[hash] = h;
+      ++hash_count[hash];
+    }
+
+#if 0 /* for debugging */
+  {
+    int min_count = num_opcodes, max_count = 0;
+    int total;
+
+    for (i = 0; i < HASH_SIZE; ++i)
+      {
+        if (hash_count[i] < min_count)
+	  min_count = hash_count[i];
+	if (hash_count[i] > max_count)
+	  max_count = hash_count[i];
+	total += hash_count[i];
+      }
+
+    printf ("Opcode hash table stats: min %d, max %d, ave %f\n",
+	    min_count, max_count, (double) total / HASH_SIZE);
+  }
+#endif
+}