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gas/testsuite/
[deliverable/binutils-gdb.git] / bfd / cpu-m68k.c
diff --git a/bfd/cpu-m68k.c b/bfd/cpu-m68k.c
index e2ac095d504bb0293830ca4ec91988076f29dee5..7e424a8f2ab27193d0e65e2bb3792da74e1d55d1 100644 (file)
--- a/bfd/cpu-m68k.c
+++ b/bfd/cpu-m68k.c
@@ -1,6 +1,6 @@
 /* BFD library support routines for architectures.
    Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002,
 /* BFD library support routines for architectures.
    Copyright 1990, 1991, 1992, 1993, 1994, 1997, 1998, 2000, 2001, 2002,
-   2003, 2004 Free Software Foundation, Inc.
+   2003, 2004, 2006 Free Software Foundation, Inc.
    Hacked by Steve Chamberlain of Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
    Hacked by Steve Chamberlain of Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
@@ -22,9 +22,14 @@
 #include "bfd.h"
 #include "sysdep.h"
 #include "libbfd.h"
 #include "bfd.h"
 #include "sysdep.h"
 #include "libbfd.h"
+#include "opcode/m68k.h"
+
+static const bfd_arch_info_type *
+bfd_m68k_compatible (const bfd_arch_info_type *a,
+                    const bfd_arch_info_type *b);
 
 #define N(name, print,d,next)  \
 
 #define N(name, print,d,next)  \
-{  32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_default_compatible,bfd_default_scan, next, }
+{  32, 32, 8, bfd_arch_m68k, name, "m68k",print,2,d,bfd_m68k_compatible,bfd_default_scan, next, }
 
 static const bfd_arch_info_type arch_info_struct[] =
   {
 
 static const bfd_arch_info_type arch_info_struct[] =
   {
@@ -34,19 +39,225 @@ static const bfd_arch_info_type arch_info_struct[] =
     N(bfd_mach_m68020,  "m68k:68020", FALSE, &arch_info_struct[4]),
     N(bfd_mach_m68030,  "m68k:68030", FALSE, &arch_info_struct[5]),
     N(bfd_mach_m68040,  "m68k:68040", FALSE, &arch_info_struct[6]),
     N(bfd_mach_m68020,  "m68k:68020", FALSE, &arch_info_struct[4]),
     N(bfd_mach_m68030,  "m68k:68030", FALSE, &arch_info_struct[5]),
     N(bfd_mach_m68040,  "m68k:68040", FALSE, &arch_info_struct[6]),
-    N(bfd_mach_cpu32,   "m68k:cpu32", FALSE, &arch_info_struct[7]),
-    N(bfd_mach_mcf5200, "m68k:5200",  FALSE, &arch_info_struct[8]),
-    N(bfd_mach_mcf5206e,"m68k:5206e", FALSE, &arch_info_struct[9]),
-    N(bfd_mach_mcf5307, "m68k:5307",  FALSE, &arch_info_struct[10]),
-    N(bfd_mach_mcf5407, "m68k:5407",  FALSE, &arch_info_struct[11]),
-    N(bfd_mach_m68060,  "m68k:68060", FALSE, &arch_info_struct[12]),
-    N(bfd_mach_mcf528x, "m68k:528x",  FALSE, &arch_info_struct[13]),
-    N(bfd_mach_mcf521x, "m68k:521x",  FALSE, &arch_info_struct[14]),
-    N(bfd_mach_mcf5249, "m68k:5249",  FALSE, &arch_info_struct[15]),
-    N(bfd_mach_mcf547x, "m68k:547x",  FALSE, &arch_info_struct[16]),
-    N(bfd_mach_mcf548x, "m68k:548x",  FALSE, &arch_info_struct[17]),
-    N(bfd_mach_mcfv4e,  "m68k:cfv4e", FALSE, 0),
+    N(bfd_mach_m68060,  "m68k:68060", FALSE, &arch_info_struct[7]),
+    N(bfd_mach_cpu32,   "m68k:cpu32", FALSE, &arch_info_struct[8]),
+    N(bfd_mach_fido,    "m68k:fido",  FALSE, &arch_info_struct[9]),
+
+    /* Various combinations of CF architecture features */
+    N(bfd_mach_mcf_isa_a_nodiv, "m68k:isa-a:nodiv",
+      FALSE, &arch_info_struct[10]),
+    N(bfd_mach_mcf_isa_a, "m68k:isa-a",
+      FALSE, &arch_info_struct[11]),
+    N(bfd_mach_mcf_isa_a_mac, "m68k:isa-a:mac",
+      FALSE, &arch_info_struct[12]),
+    N(bfd_mach_mcf_isa_a_emac, "m68k:isa-a:emac",
+      FALSE, &arch_info_struct[13]),
+    N(bfd_mach_mcf_isa_aplus, "m68k:isa-aplus",
+      FALSE, &arch_info_struct[14]),
+    N(bfd_mach_mcf_isa_aplus_mac, "m68k:isa-aplus:mac",
+      FALSE, &arch_info_struct[15]),
+    N(bfd_mach_mcf_isa_aplus_emac, "m68k:isa-aplus:emac",
+      FALSE, &arch_info_struct[16]),
+    N(bfd_mach_mcf_isa_b_nousp, "m68k:isa-b:nousp",
+      FALSE, &arch_info_struct[17]),
+    N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:isa-b:nousp:mac",
+      FALSE, &arch_info_struct[18]),
+    N(bfd_mach_mcf_isa_b_nousp_emac, "m68k:isa-b:nousp:emac",
+      FALSE, &arch_info_struct[19]),
+    N(bfd_mach_mcf_isa_b, "m68k:isa-b",
+      FALSE, &arch_info_struct[20]),
+    N(bfd_mach_mcf_isa_b_mac, "m68k:isa-b:mac",
+      FALSE, &arch_info_struct[21]),
+    N(bfd_mach_mcf_isa_b_emac, "m68k:isa-b:emac",
+      FALSE, &arch_info_struct[22]),
+    N(bfd_mach_mcf_isa_b_float, "m68k:isa-b:float",
+      FALSE, &arch_info_struct[23]),
+    N(bfd_mach_mcf_isa_b_float_mac, "m68k:isa-b:float:mac",
+      FALSE, &arch_info_struct[24]),
+    N(bfd_mach_mcf_isa_b_float_emac, "m68k:isa-b:float:emac",
+      FALSE, &arch_info_struct[25]),
+    N(bfd_mach_mcf_isa_c, "m68k:isa-c",
+      FALSE, &arch_info_struct[26]),
+    N(bfd_mach_mcf_isa_c_mac, "m68k:isa-c:mac",
+      FALSE, &arch_info_struct[27]),
+    N(bfd_mach_mcf_isa_c_emac, "m68k:isa-c:emac",
+      FALSE, &arch_info_struct[28]),
+
+    /* Legacy names for CF architectures */
+    N(bfd_mach_mcf_isa_a_nodiv, "m68k:5200", FALSE, &arch_info_struct[29]),
+    N(bfd_mach_mcf_isa_a_mac,"m68k:5206e", FALSE, &arch_info_struct[30]),
+    N(bfd_mach_mcf_isa_a_mac, "m68k:5307", FALSE, &arch_info_struct[31]),
+    N(bfd_mach_mcf_isa_b_nousp_mac, "m68k:5407", FALSE, &arch_info_struct[32]),
+    N(bfd_mach_mcf_isa_aplus_emac, "m68k:528x", FALSE, &arch_info_struct[33]),
+    N(bfd_mach_mcf_isa_aplus_emac, "m68k:521x", FALSE, &arch_info_struct[34]),
+    N(bfd_mach_mcf_isa_a_emac, "m68k:5249", FALSE, &arch_info_struct[35]),
+    N(bfd_mach_mcf_isa_b_float_emac, "m68k:547x",
+      FALSE, &arch_info_struct[36]),
+    N(bfd_mach_mcf_isa_b_float_emac, "m68k:548x",
+      FALSE, &arch_info_struct[37]),
+    N(bfd_mach_mcf_isa_b_float_emac, "m68k:cfv4e", FALSE, 0),
   };
 
 const bfd_arch_info_type bfd_m68k_arch =
   N(0, "m68k", TRUE, &arch_info_struct[0]);
   };
 
 const bfd_arch_info_type bfd_m68k_arch =
   N(0, "m68k", TRUE, &arch_info_struct[0]);
+
+/* Table indexed by bfd_mach_arch number indicating which
+   architectural features are supported.  */
+static const unsigned m68k_arch_features[] = 
+{
+  0,
+  m68000|m68881|m68851,
+  m68000|m68881|m68851,
+  m68010|m68881|m68851,
+  m68020|m68881|m68851,
+  m68030|m68881|m68851,
+  m68040|m68881|m68851,
+  m68060|m68881|m68851,
+  cpu32|m68881,
+  fido_a|m68881,
+  mcfisa_a,
+  mcfisa_a|mcfhwdiv,
+  mcfisa_a|mcfhwdiv|mcfmac,
+  mcfisa_a|mcfhwdiv|mcfemac,
+  mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp,
+  mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfmac,
+  mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp|mcfemac,
+  mcfisa_a|mcfhwdiv|mcfisa_b,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfemac,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfmac,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|mcfemac,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfmac,
+  mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac,
+  mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp,
+  mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfmac,
+  mcfisa_a|mcfhwdiv|mcfisa_c|mcfusp|mcfemac,
+};
+
+/* Return the count of bits set in MASK  */
+static unsigned
+bit_count (unsigned mask)
+{
+  unsigned ix;
+
+  for (ix = 0; mask; ix++)
+    /* Clear the LSB set */
+    mask ^= mask & -mask;
+  return ix;
+}
+
+/* Return the architectural features supported by MACH */
+
+unsigned
+bfd_m68k_mach_to_features (int mach)
+{
+  if ((unsigned)mach
+      >= sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]))
+    mach = 0;
+  return m68k_arch_features[mach];
+}
+
+/* Return the bfd machine that most closely represents the
+   architectural features.  We find the machine with the smallest
+   number of additional features.  If there is no such machine, we
+   find the one with the smallest number of missing features.  */
+
+int bfd_m68k_features_to_mach (unsigned features)
+{
+  int superset = 0, subset = 0;
+  unsigned extra = 99, missing = 99;
+  unsigned ix;
+
+  for (ix = 0;
+       ix != sizeof (m68k_arch_features) / sizeof (m68k_arch_features[0]);
+       ix++)
+    {
+      unsigned this_extra, this_missing;
+      
+      if (m68k_arch_features[ix] == features)
+       return ix;
+      this_extra = bit_count (m68k_arch_features[ix] & ~features);
+      if (this_extra < extra)
+       {
+         extra = this_extra;
+         superset = ix;
+       }
+      
+      this_missing = bit_count (features & ~m68k_arch_features[ix]);
+      if (this_missing < missing)
+       {
+         missing = this_missing;
+         superset = ix;
+       }
+    }
+  return superset ? superset : subset;
+}
+
+static const bfd_arch_info_type *
+bfd_m68k_compatible (const bfd_arch_info_type *a,
+                    const bfd_arch_info_type *b)
+{
+  if (a->arch != b->arch)
+    return NULL;
+
+  if (a->bits_per_word != b->bits_per_word)
+    return NULL;
+
+  if (!a->mach)
+    return b;
+  if (!b->mach)
+    return a;
+  
+  if (a->mach <= bfd_mach_m68060 && b->mach <= bfd_mach_m68060)
+    /* Merge m68k machine. */
+    return a->mach > b->mach ? a : b;
+  else if (a->mach >= bfd_mach_cpu32 && b->mach >= bfd_mach_cpu32)
+    {
+      /* Merge the machine features.  */
+      unsigned features = (bfd_m68k_mach_to_features (a->mach)
+                          | bfd_m68k_mach_to_features (b->mach));
+
+      /* CPU32 and Coldfire are incompatible.  */
+      if ((~features & (cpu32 | mcfisa_a)) == 0)
+       return NULL;
+
+      /* Fido and Coldfire are incompatible.  */
+      if ((~features & (fido_a | mcfisa_a)) == 0)
+       return NULL;
+
+      /* ISA A+ and ISA B are incompatible.  */
+      if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
+       return NULL;
+
+      /* ISA B and ISA C are incompatible.  */
+      if ((~features & (mcfisa_b | mcfisa_c)) == 0)
+       return NULL;
+
+      /* MAC and EMAC code cannot be merged.  */
+      if ((~features & (mcfmac | mcfemac)) == 0)
+       return NULL;
+
+      /* CPU32 is compatible with Fido except that Fido does not
+        support tbl instructions.  Warn when the user wants to mix
+        the two.  */
+      if ((a->mach == bfd_mach_cpu32 && b->mach == bfd_mach_fido)
+         || (a->mach == bfd_mach_fido && b->mach == bfd_mach_cpu32))
+       {
+         static int cpu32_fido_mix_warning;
+         if (!cpu32_fido_mix_warning)
+           {
+             cpu32_fido_mix_warning = 1;
+             (*_bfd_error_handler) ("warning: linking CPU32 objects with fido objects");
+           }
+         return bfd_lookup_arch (a->arch,
+                                 bfd_m68k_features_to_mach (fido_a | m68881));
+       }
+
+      return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
+    }
+  else
+    /* They are incompatible.  */
+    return NULL;
+}
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