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_mcf_isa_a_nodiv
&& b->mach >= bfd_mach_mcf_isa_a_nodiv)
{
/* Merge cf machine. */
unsigned features = (bfd_m68k_mach_to_features (a->mach)
| bfd_m68k_mach_to_features (b->mach));
/* ISA A+ and ISA B are incompatible. */
if ((~features & (mcfisa_aa | mcfisa_b)) == 0)
return NULL;
/* MAC and EMAC code cannot be merged. */
if ((~features & (mcfmac | mcfemac)) == 0)
return NULL;
return bfd_lookup_arch (a->arch, bfd_m68k_features_to_mach (features));
}
else
/* They are incompatible. */
return NULL;
}
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;
}