* amd64-tdep.c (amd64_convert_register_p): Delete.

	(amd64_init_abi): Use i387_convert_register_p.
	* alpha-tdep.c (alpha_convert_register_p): Return zero for
	eight byte types.
	(alpha_register_to_value, alpha_value_to_register): Do not handle
	eight byte types.
	* i386-tdep.c (i386_convert_register_p): Use i387_convert_register_p.
	* i387-tdep.c (i387_convert_register_p): New.
	(i387_register_to_value, i387_value_to_register): Update comments.
	* i387-tdep.h (i387_convert_register_p): Declare.
	* ia64-tdep.c (ia64_convert_register_p): Return zero for
	builtin_type_ia64_ext.
	(ia64_gdbarch_init): Do not initialize builtin_type_ia64_ext here.
	(_initialize_ia64_tdep): Initialize builtin_type_ia64_ext here.
	* m68k-tdep.c (m68k_convert_register_p): Return zero for
	builtin_type_m68881_ext.
	(m68k_register_to_value, m68k_value_to_register): Update comments.

	* gdbint.texinfo (Register and Memory Data, Target Conditionals):
	Document that gdbarch_convert_register_p should return zero for no-op
	conversions.

1 files changed, 4 insertions, 5 deletions

diff --git a/gdb/m68k-tdep.c b/gdb/m68k-tdep.c
index 87e8c1d..b75a952 100644
--- a/gdb/m68k-tdep.c
+++ b/gdb/m68k-tdep.c
@@ -171,7 +171,8 @@ m68k_convert_register_p (int regnum, struct type *type)
 {
   if (!gdbarch_tdep (current_gdbarch)->fpregs_present)
     return 0;
-  return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7);
+  return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FP0_REGNUM + 7
+	  && type != builtin_type_m68881_ext);
 }
 
 /* Read a value of type TYPE from register REGNUM in frame FRAME, and
@@ -193,8 +194,7 @@ m68k_register_to_value (struct frame_info *frame, int regnum,
       return;
     }
 
-  /* Convert to TYPE.  This should be a no-op if TYPE is equivalent to
-     the extended floating-point format used by the FPU.  */
+  /* Convert to TYPE.  */
   get_frame_register (frame, regnum, from);
   convert_typed_floating (from, fpreg_type, to, type);
 }
@@ -218,8 +218,7 @@ m68k_value_to_register (struct frame_info *frame, int regnum,
       return;
     }
 
-  /* Convert from TYPE.  This should be a no-op if TYPE is equivalent
-     to the extended floating-point format used by the FPU.  */
+  /* Convert from TYPE.  */
   convert_typed_floating (from, type, to, fpreg_type);
   put_frame_register (frame, regnum, to);
 }