gas/

2005-02-11  Jan Beulich  <jbeulich@novell.com>

	* config/tc-ia64.c (md): Remove last_groups and group_idx.
	(errata_nop_necessary_p): Remove declaraction and definition.
	(emit_one_bundle): Don't call errata_nop_necessary_p. Don't
	update md.group_idx. Don't reset md.last_groups.

1 files changed, 0 insertions, 121 deletions

diff --git a/gas/config/tc-ia64.c b/gas/config/tc-ia64.c
index 1beec65..9bed236 100644
--- a/gas/config/tc-ia64.c
+++ b/gas/config/tc-ia64.c
@@ -292,25 +292,6 @@ static struct
 				       the current DV-checking block.  */
     int maxpaths;                   /* size currently allocated for
 				       entry_labels */
-    /* Support for hardware errata workarounds.  */
-
-    /* Record data about the last three insn groups.  */
-    struct group
-    {
-      /* B-step workaround.
-	 For each predicate register, this is set if the corresponding insn
-	 group conditionally sets this register with one of the affected
-	 instructions.  */
-      int p_reg_set[64];
-      /* B-step workaround.
-	 For each general register, this is set if the corresponding insn
-	 a) is conditional one one of the predicate registers for which
-	    P_REG_SET is 1 in the corresponding entry of the previous group,
-	 b) sets this general register with one of the affected
-	    instructions.  */
-      int g_reg_set_conditionally[128];
-    } last_groups[3];
-    int group_idx;
 
     int pointer_size;       /* size in bytes of a pointer */
     int pointer_size_shift; /* shift size of a pointer for alignment */
@@ -775,7 +756,6 @@ static enum operand_match_result operand_match PARAMS ((const struct ia64_opcode
 							expressionS *e));
 static int parse_operand PARAMS ((expressionS *e));
 static struct ia64_opcode * parse_operands PARAMS ((struct ia64_opcode *));
-static int errata_nop_necessary_p PARAMS ((struct slot *, enum ia64_unit));
 static void build_insn PARAMS ((struct slot *, bfd_vma *));
 static void emit_one_bundle PARAMS ((void));
 static void fix_insn PARAMS ((fixS *, const struct ia64_operand *, valueT));
@@ -6136,98 +6116,6 @@ parse_operands (idesc)
   return idesc;
 }
 
-/* Keep track of state necessary to determine whether a NOP is necessary
-   to avoid an erratum in A and B step Itanium chips, and return 1 if we
-   detect a case where additional NOPs may be necessary.  */
-static int
-errata_nop_necessary_p (slot, insn_unit)
-     struct slot *slot;
-     enum ia64_unit insn_unit;
-{
-  int i;
-  struct group *this_group = md.last_groups + md.group_idx;
-  struct group *prev_group = md.last_groups + (md.group_idx + 2) % 3;
-  struct ia64_opcode *idesc = slot->idesc;
-
-  /* Test whether this could be the first insn in a problematic sequence.  */
-  if (insn_unit == IA64_UNIT_F)
-    {
-      for (i = 0; i < idesc->num_outputs; i++)
-	if (idesc->operands[i] == IA64_OPND_P1
-	    || idesc->operands[i] == IA64_OPND_P2)
-	  {
-	    int regno = slot->opnd[i].X_add_number - REG_P;
-	    /* Ignore invalid operands; they generate errors elsewhere.  */
-	    if (regno >= 64)
-	      return 0;
-	    this_group->p_reg_set[regno] = 1;
-	  }
-    }
-
-  /* Test whether this could be the second insn in a problematic sequence.  */
-  if (insn_unit == IA64_UNIT_M && slot->qp_regno > 0
-      && prev_group->p_reg_set[slot->qp_regno])
-    {
-      for (i = 0; i < idesc->num_outputs; i++)
-	if (idesc->operands[i] == IA64_OPND_R1
-	    || idesc->operands[i] == IA64_OPND_R2
-	    || idesc->operands[i] == IA64_OPND_R3)
-	  {
-	    int regno = slot->opnd[i].X_add_number - REG_GR;
-	    /* Ignore invalid operands; they generate errors elsewhere.  */
-	    if (regno >= 128)
-	      return 0;
-	    if (strncmp (idesc->name, "add", 3) != 0
-		&& strncmp (idesc->name, "sub", 3) != 0
-		&& strncmp (idesc->name, "shladd", 6) != 0
-		&& (idesc->flags & IA64_OPCODE_POSTINC) == 0)
-	      this_group->g_reg_set_conditionally[regno] = 1;
-	  }
-    }
-
-  /* Test whether this could be the third insn in a problematic sequence.  */
-  for (i = 0; i < NELEMS (idesc->operands) && idesc->operands[i]; i++)
-    {
-      if (/* For fc, ptc, ptr, tak, thash, tpa, ttag, probe, ptr, ptc.  */
-	  idesc->operands[i] == IA64_OPND_R3
-	  /* For mov indirect.  */
-	  || idesc->operands[i] == IA64_OPND_RR_R3
-	  || idesc->operands[i] == IA64_OPND_DBR_R3
-	  || idesc->operands[i] == IA64_OPND_IBR_R3
-	  || idesc->operands[i] == IA64_OPND_PKR_R3
-	  || idesc->operands[i] == IA64_OPND_PMC_R3
-	  || idesc->operands[i] == IA64_OPND_PMD_R3
-	  || idesc->operands[i] == IA64_OPND_MSR_R3
-	  || idesc->operands[i] == IA64_OPND_CPUID_R3
-	  /* For itr.  */
-	  || idesc->operands[i] == IA64_OPND_ITR_R3
-	  || idesc->operands[i] == IA64_OPND_DTR_R3
-	  /* Normal memory addresses (load, store, xchg, cmpxchg, etc.).  */
-	  || idesc->operands[i] == IA64_OPND_MR3)
-	{
-	  int regno = slot->opnd[i].X_add_number - REG_GR;
-	  /* Ignore invalid operands; they generate errors elsewhere.  */
-	  if (regno >= 128)
-	    return 0;
-	  if (idesc->operands[i] == IA64_OPND_R3)
-	    {
-	      if (strcmp (idesc->name, "fc") != 0
-		  && strcmp (idesc->name, "tak") != 0
-		  && strcmp (idesc->name, "thash") != 0
-		  && strcmp (idesc->name, "tpa") != 0
-		  && strcmp (idesc->name, "ttag") != 0
-		  && strncmp (idesc->name, "ptr", 3) != 0
-		  && strncmp (idesc->name, "ptc", 3) != 0
-		  && strncmp (idesc->name, "probe", 5) != 0)
-		return 0;
-	    }
-	  if (prev_group->g_reg_set_conditionally[regno])
-	    return 1;
-	}
-    }
-  return 0;
-}
-
 static void
 build_insn (slot, insnp)
      struct slot *slot;
@@ -6679,9 +6567,6 @@ emit_one_bundle ()
 	  dwarf2_gen_line_info (addr, &md.slot[curr].debug_line);
 	}
 
-      if (errata_nop_necessary_p (md.slot + curr, insn_unit))
-	as_warn (_("Additional NOP may be necessary to workaround Itanium processor A/B step errata"));
-
       build_insn (md.slot + curr, insn + i);
 
       ptr = md.slot[curr].unwind_record;
@@ -6733,12 +6618,6 @@ emit_one_bundle ()
 
       end_of_insn_group = md.slot[curr].end_of_insn_group;
 
-      if (end_of_insn_group)
-	{
-	  md.group_idx = (md.group_idx + 1) % 3;
-	  memset (md.last_groups + md.group_idx, 0, sizeof md.last_groups[0]);
-	}
-
       /* clear slot:  */
       ia64_free_opcode (md.slot[curr].idesc);
       memset (md.slot + curr, 0, sizeof (md.slot[curr]));