[PATCH 5/6] Use disassble.c:disassembler select rs6000 disassembler

[Yao Qi <qiyaoltc@gmail.com>]

Nowadays, rs6000 disassembler is selected in different ways in
opcodes and gdb,

opcodes:
    case bfd_arch_rs6000:
      if (mach == bfd_mach_ppc_620)
	disassemble = print_insn_big_powerpc;
      else
	disassemble = print_insn_rs6000;
      break;

gdb:

  if (arch == bfd_arch_rs6000)
    set_gdbarch_print_insn (gdbarch, print_insn_rs6000);
  else
    set_gdbarch_print_insn (gdbarch, gdb_print_insn_powerpc);

I am not sure which one is the right one.  However, such selection
should be done in one place instead of two.  In fact, this changes gdb
to align with objdump on disassembler selection.

gdb:

2017-05-15  Yao Qi  <yao.qi@linaro.org>

	* rs6000-tdep.c (gdb_print_insn_powerpc): Remove.
	(rs6000_gdbarch_init): Don't call set_gdbarch_print_insn.
---
 gdb/rs6000-tdep.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 4072464..0bd65fc 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -3233,14 +3233,6 @@ find_variant_by_arch (enum bfd_architecture arch, unsigned long mach)
   return NULL;
 }
 
-static int
-gdb_print_insn_powerpc (bfd_vma memaddr, disassemble_info *info)
-{
-  if (info->endian == BFD_ENDIAN_BIG)
-    return print_insn_big_powerpc (memaddr, info);
-  else
-    return print_insn_little_powerpc (memaddr, info);
-}
 \f
 static CORE_ADDR
 rs6000_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
@@ -6449,12 +6441,6 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
 
   set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
 
-  /* Select instruction printer.  */
-  if (arch == bfd_arch_rs6000)
-    set_gdbarch_print_insn (gdbarch, print_insn_rs6000);
-  else
-    set_gdbarch_print_insn (gdbarch, gdb_print_insn_powerpc);
-
   set_gdbarch_num_regs (gdbarch, PPC_NUM_REGS);
 
   if (have_spe)
-- 
1.9.1