* emultempl/armelf.em: Update copyright to 2010 and 2011.

[deliverable/binutils-gdb.git] / gas / config / tc-xtensa.h

diff --git a/gas/config/tc-xtensa.h b/gas/config/tc-xtensa.h
index 251105ea2701ec03dfd9fd897801a80d82aa755c..969f24c27a8ab492d4b58311e92c40b86eb8867d 100644 (file)
--- a/gas/config/tc-xtensa.h
+++ b/gas/config/tc-xtensa.h
@@ -1,11 +1,12 @@
 /* tc-xtensa.h -- Header file for tc-xtensa.c.
-   Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   Free Software Foundation, Inc.
 
    This file is part of GAS, the GNU Assembler.
 
    GAS 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, or (at your option)
+   the Free Software Foundation; either version 3, or (at your option)
    any later version.
 
    GAS is distributed in the hope that it will be useful,
@@ -46,6 +47,8 @@ struct fix;
 
 enum xtensa_relax_statesE
 {
+  RELAX_XTENSA_NONE,
+
   RELAX_ALIGN_NEXT_OPCODE,
   /* Use the first opcode of the next fragment to determine the
      alignment requirements.  This is ONLY used for LOOPs currently.  */
@@ -104,7 +107,9 @@ enum xtensa_relax_statesE
   RELAX_LOOP_END_ADD_NOP,
   /* When the code density option is available, this will generate a
      NOP.N marked RELAX_NARROW.  Otherwise, it will create an rs_fill
-     fragment with a NOP in it.  */
+     fragment with a NOP in it.  Once a frag has been converted to
+     RELAX_LOOP_END_ADD_NOP, it should never be changed back to 
+     RELAX_LOOP_END.  */
 
   RELAX_LITERAL,
   /* Another fragment could generate an expansion here but has not yet.  */
@@ -131,18 +136,20 @@ enum xtensa_relax_statesE
 
   RELAX_IMMED,
   /* The last instruction in this fragment (at->fr_opcode) contains
-     the value defined by fr_symbol (fr_offset = 0).  If the value
-     does not fit, use the specified expansion.  This is similar to
-     "NARROW", except that these may not be expanded in order to align
-     code.  */
+     an immediate or symbol.  If the value does not fit, relax the
+     opcode using expansions from the relax table.  */
 
   RELAX_IMMED_STEP1,
   /* The last instruction in this fragment (at->fr_opcode) contains a
-     literal.  It has already been expanded at least 1 step.  */
+     literal.  It has already been expanded 1 step.  */
 
   RELAX_IMMED_STEP2,
   /* The last instruction in this fragment (at->fr_opcode) contains a
-     literal.  It has already been expanded at least 2 steps.  */
+     literal.  It has already been expanded 2 steps.  */
+
+  RELAX_IMMED_STEP3,
+  /* The last instruction in this fragment (at->fr_opcode) contains a
+     literal.  It has already been expanded 3 steps.  */
 
   RELAX_SLOTS,
   /* There are instructions within the last VLIW instruction that need
@@ -179,7 +186,7 @@ enum xtensa_relax_statesE
 
 /* This is used as a stopper to bound the number of steps that
    can be taken.  */
-#define RELAX_IMMED_MAXSTEPS (RELAX_IMMED_STEP2 - RELAX_IMMED)
+#define RELAX_IMMED_MAXSTEPS (RELAX_IMMED_STEP3 - RELAX_IMMED)
 
 struct xtensa_frag_type
 {
@@ -247,15 +254,20 @@ struct xtensa_frag_type
   int literal_expansion[MAX_SLOTS];
   int unreported_expansion;
 
+  /* For slots that have a free register for relaxation, record that
+     register.  */
+  expressionS free_reg[MAX_SLOTS];
+
   /* For text fragments that can generate literals at relax time:  */
   fragS *literal_frags[MAX_SLOTS];
   enum xtensa_relax_statesE slot_subtypes[MAX_SLOTS];
   symbolS *slot_symbols[MAX_SLOTS];
   offsetT slot_offsets[MAX_SLOTS];
 
-  /* The global aligner needs to walk backward through the list of
-     frags.  This field is only valid after xtensa_end.  */
-  fragS *fr_prev;
+  /* When marking frags after this one in the chain as no transform,
+     cache the last one in the chain, so that we can skip to the
+     end of the chain.  */
+  fragS *no_transform_end;
 };
 
 
@@ -273,6 +285,7 @@ typedef struct xtensa_symfield_type
 {
   unsigned int is_loop_target : 1;
   unsigned int is_branch_target : 1;
+  symbolS *next_expr_symbol;
 } xtensa_symfield_type;
 
 
@@ -328,7 +341,7 @@ extern char *xtensa_section_rename (char *);
 #define TC_FORCE_RELOCATION(fix)       xtensa_force_relocation (fix)
 #define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
   (! SEG_NORMAL (seg) || xtensa_force_relocation (fix))
-#define        TC_VALIDATE_FIX_SUB(fix)        xtensa_validate_fix_sub (fix)
+#define        TC_VALIDATE_FIX_SUB(fix, seg)   xtensa_validate_fix_sub (fix)
 #define NO_PSEUDO_DOT                  xtensa_check_inside_bundle ()
 #define tc_canonicalize_symbol_name(s) xtensa_section_rename (s)
 #define tc_canonicalize_section_name(s)        xtensa_section_rename (s)
@@ -336,6 +349,7 @@ extern char *xtensa_section_rename (char *);
 #define tc_fix_adjustable(fix)         xtensa_fix_adjustable (fix)
 #define tc_frob_label(sym)             xtensa_frob_label (sym)
 #define tc_unrecognized_line(ch)       xtensa_unrecognized_line (ch)
+#define tc_symbol_new_hook(sym)                xtensa_symbol_new_hook (sym)
 #define md_do_align(a,b,c,d,e)         xtensa_flush_pending_output ()
 #define md_elf_section_change_hook     xtensa_elf_section_change_hook
 #define md_end                         xtensa_end
@@ -370,6 +384,10 @@ extern char *xtensa_section_rename (char *);
 #define md_relax_frag(segment, fragP, stretch) \
   xtensa_relax_frag (fragP, stretch, &stretched)
 
+/* Only allow call frame debug info optimization when linker relaxation is
+   not enabled as otherwise we could generate the DWARF directives without
+   the relocs necessary to patch them up.  */
+#define md_allow_eh_opt (linkrelax == 0)
 
 #define LOCAL_LABELS_FB 1
 #define WORKING_DOT_WORD 1