-Wimplicit-fallthrough warning fixes

Comment changes.

bfd/
	* coff-h8300.c: Spell fall through comments consistently.
	* coffgen.c: Likewise.
	* elf32-hppa.c: Likewise.
	* elf32-ppc.c: Likewise.
	* elf32-score.c: Likewise.
	* elf32-score7.c: Likewise.
	* elf64-ppc.c: Likewise.
	* elfxx-aarch64.c: Likewise.
	* elfxx-mips.c: Likewise.
	* cpu-ns32k.c: Add missing fall through comments.
	* elf-m10300.c: Likewise.
	* elf32-arm.c: Likewise.
	* elf32-avr.c: Likewise.
	* elf32-bfin.c: Likewise.
	* elf32-frv.c: Likewise.
	* elf32-i386.c: Likewise.
	* elf32-microblaze.c: Likewise.
	* elf32-nds32.c: Likewise.
	* elf32-ppc.c: Likewise.
	* elf32-rl78.c: Likewise.
	* elf32-rx.c: Likewise.
	* elf32-s390.c: Likewise.
	* elf32-sh.c: Likewise.
	* elf32-tic6x.c: Likewise.
	* elf64-ia64-vms.c: Likewise.
	* elf64-ppc.c: Likewise.
	* elf64-s390.c: Likewise.
	* elf64-x86-64.c: Likewise.
	* elflink.c: Likewise.
	* elfnn-aarch64.c: Likewise.
	* elfnn-ia64.c: Likewise.
	* ieee.c: Likewise.
	* oasys.c: Likewise.
	* pdp11.c: Likewise.
	* srec.c: Likewise.
	* versados.c: Likewise.
opcodes/
	* aarch64-opc.c: Spell fall through comments consistently.
	* i386-dis.c: Likewise.
	* aarch64-dis.c: Add missing fall through comments.
	* aarch64-opc.c: Likewise.
	* arc-dis.c: Likewise.
	* arm-dis.c: Likewise.
	* i386-dis.c: Likewise.
	* m68k-dis.c: Likewise.
	* mep-asm.c: Likewise.
	* ns32k-dis.c: Likewise.
	* sh-dis.c: Likewise.
	* tic4x-dis.c: Likewise.
	* tic6x-dis.c: Likewise.
	* vax-dis.c: Likewise.
binutils/
	* dlltool.c: Spell fall through comments consistently.
	* objcopy.c: Likewise.
	* readelf.c: Likewise.
	* dwarf.c: Add missing fall through comments.
	* elfcomm.c: Likewise.
	* sysinfo.y: Likewise.
	* readelf.c: Likewise.  Also remove extraneous comments.
gas/
	* app.c: Add missing fall through comments.
	* dw2gencfi.c: Likewise.
	* expr.c: Likewise.
	* config/tc-alpha.c: Likewise.
	* config/tc-arc.c: Likewise.
	* config/tc-arm.c: Likewise.
	* config/tc-cr16.c: Likewise.
	* config/tc-crx.c: Likewise.
	* config/tc-dlx.c: Likewise.
	* config/tc-h8300.c: Likewise.
	* config/tc-hppa.c: Likewise.
	* config/tc-i370.c: Likewise.
	* config/tc-i386.c: Likewise.
	* config/tc-i960.c: Likewise.
	* config/tc-ia64.c: Likewise.
	* config/tc-m68hc11.c: Likewise.
	* config/tc-m68k.c: Likewise.
	* config/tc-mep.c: Likewise.
	* config/tc-metag.c: Likewise.
	* config/tc-microblaze.c: Likewise.
	* config/tc-mips.c: Likewise.
	* config/tc-ns32k.c: Likewise.
	* config/tc-rx.c: Likewise.
	* config/tc-score.c: Likewise.
	* config/tc-score7.c: Likewise.
	* config/tc-sh.c: Likewise.
	* config/tc-tic4x.c: Likewise.
	* config/tc-vax.c: Likewise.
	* config/tc-xstormy16.c: Likewise.
	* config/tc-z80.c: Likewise.
	* config/tc-z8k.c: Likewise.
	* config/obj-elf.c: Likewise.
	* config/tc-i386.c: Likewise.
	* depend.c: Spell fall through comments consistently.
	* config/tc-arm.c: Likewise.
	* config/tc-d10v.c: Likewise.
	* config/tc-i960.c: Likewise.
	* config/tc-ia64.c: Likewise.
	* config/tc-m68k.c: Likewise.
	* config/tc-mcore.c: Likewise.
	* config/tc-mep.c: Likewise.
	* config/tc-ns32k.c: Likewise.
	* config/tc-visium.c: Likewise.
	* config/tc-xstormy16.c: Likewise.
	* config/tc-z8k.c: Likewise.
gprof/
	* gprof.c: Add missing fall through comments.
ld/
	* lexsup.c: Spell fall through comments consistently and add
	missing fall through comments.

13 files changed, 47 insertions, 4 deletions

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 6602768..4416659 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,22 @@
 2016-10-06  Alan Modra  <amodra@gmail.com>
 
+	* aarch64-opc.c: Spell fall through comments consistently.
+	* i386-dis.c: Likewise.
+	* aarch64-dis.c: Add missing fall through comments.
+	* aarch64-opc.c: Likewise.
+	* arc-dis.c: Likewise.
+	* arm-dis.c: Likewise.
+	* i386-dis.c: Likewise.
+	* m68k-dis.c: Likewise.
+	* mep-asm.c: Likewise.
+	* ns32k-dis.c: Likewise.
+	* sh-dis.c: Likewise.
+	* tic4x-dis.c: Likewise.
+	* tic6x-dis.c: Likewise.
+	* vax-dis.c: Likewise.
+
+2016-10-06  Alan Modra  <amodra@gmail.com>
+
 	* arc-ext.c (create_map): Add missing break.
 	* msp430-decode.opc (encode_as): Likewise.
 	* msp430-decode.c: Regenerate.
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index 82afe8b..d8c5fa7 100644
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -788,10 +788,15 @@ decode_limm (uint32_t esize, aarch64_insn value, int64_t *result)
   switch (simd_size)
     {
     case  2: imm = (imm <<  2) | imm;
+      /* Fall through.  */
     case  4: imm = (imm <<  4) | imm;
+      /* Fall through.  */
     case  8: imm = (imm <<  8) | imm;
+      /* Fall through.  */
     case 16: imm = (imm << 16) | imm;
+      /* Fall through.  */
     case 32: imm = (imm << 32) | imm;
+      /* Fall through.  */
     case 64: break;
     default: assert (0); return 0;
     }
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index adc34e2..4b1411f 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -1156,10 +1156,15 @@ build_immediate_table (void)
 	    switch (log_e)
 	      {
 	      case 1: imm = (imm <<  2) | imm;
+		/* Fall through.  */
 	      case 2: imm = (imm <<  4) | imm;
+		/* Fall through.  */
 	      case 3: imm = (imm <<  8) | imm;
+		/* Fall through.  */
 	      case 4: imm = (imm << 16) | imm;
+		/* Fall through.  */
 	      case 5: imm = (imm << 32) | imm;
+		/* Fall through.  */
 	      case 6: break;
 	      default: abort ();
 	      }
@@ -1969,7 +1974,7 @@ operand_general_constraint_met_p (const aarch64_opnd_info *opnds, int idx,
 		{
 		case OP_MOV_IMM_WIDEN:
 		  imm = ~imm;
-		  /* Fall through...  */
+		  /* Fall through.  */
 		case OP_MOV_IMM_WIDE:
 		  if (!aarch64_wide_constant_p (imm, esize == 4, NULL))
 		    {
diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c
index e4df678..c4e118e 100644
--- a/opcodes/arc-dis.c
+++ b/opcodes/arc-dis.c
@@ -703,6 +703,7 @@ arc_insn_length (bfd_byte msb, bfd_byte lsb, struct disassemble_info *info)
           if (minor_opcode < 4)
             return 2;
         }
+      /* Fall through.  */
     case bfd_mach_arc_arc600:
       return (major_opcode > 0xb) ? 2 : 4;
       break;
diff --git a/opcodes/arm-dis.c b/opcodes/arm-dis.c
index fc9ac61..87d4930 100644
--- a/opcodes/arm-dis.c
+++ b/opcodes/arm-dis.c
@@ -4686,6 +4686,7 @@ print_insn_arm (bfd_vma pc, struct disassemble_info *info, long given)
 
 		    case 'S':
 		      allow_unpredictable = TRUE;
+		      /* Fall through.  */
 		    case 's':
                       if ((given & 0x004f0000) == 0x004f0000)
 			{
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index c08109e..5c5f926 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -14850,13 +14850,14 @@ intel_operand_size (int bytemode, int sizeflag)
 	  oappend ("QWORD PTR ");
 	  break;
 	}
+      /* Fall through.  */
     case stack_v_mode:
       if (address_mode == mode_64bit && ((sizeflag & DFLAG) || (rex & REX_W)))
 	{
 	  oappend ("QWORD PTR ");
 	  break;
 	}
-      /* FALLTHRU */
+      /* Fall through.  */
     case v_mode:
     case v_swap_mode:
     case dq_mode:
@@ -15233,6 +15234,7 @@ OP_E_register (int bytemode, int sizeflag)
 	  names = names64;
 	  break;
 	}
+      /* Fall through.  */
     case stack_v_mode:
       if (address_mode == mode_64bit && ((sizeflag & DFLAG) || (rex & REX_W)))
 	{
@@ -15240,7 +15242,7 @@ OP_E_register (int bytemode, int sizeflag)
 	  break;
 	}
       bytemode = v_mode;
-      /* FALLTHRU */
+      /* Fall through.  */
     case v_mode:
     case v_swap_mode:
     case dq_mode:
@@ -15321,7 +15323,7 @@ OP_E_memory (int bytemode, int sizeflag)
 	      shift = vex.w ? 3 : 2;
 	      break;
 	    }
-	  /* Fall through if vex.b == 0.  */
+	  /* Fall through.  */
 	case xmmqd_mode:
 	case xmmdw_mode:
 	case ymmq_mode:
@@ -17301,6 +17303,7 @@ get_vex_imm8 (int sizeflag, int opnum)
 		    if (base != 5)
 		      /* No displacement. */
 		      break;
+		    /* Fall through.  */
 		  case 2:
 		    /* 4 byte displacement.  */
 		    bytes_before_imm += 4;
@@ -17327,6 +17330,7 @@ get_vex_imm8 (int sizeflag, int opnum)
 		  if (modrm.rm != 6)
 		    /* No displacement. */
 		    break;
+		  /* Fall through.  */
 		case 2:
 		  /* 2 byte displacement.  */
 		  bytes_before_imm += 2;
diff --git a/opcodes/m68k-dis.c b/opcodes/m68k-dis.c
index 11c057d..1e7c830 100644
--- a/opcodes/m68k-dis.c
+++ b/opcodes/m68k-dis.c
@@ -1220,6 +1220,7 @@ print_insn_arg (const char *d,
 
     case 'X':
       place = '8';
+      /* Fall through.  */
     case 'Y':
     case 'Z':
     case 'W':
diff --git a/opcodes/mep-asm.c b/opcodes/mep-asm.c
index d8a1cf3..89116ee 100644
--- a/opcodes/mep-asm.c
+++ b/opcodes/mep-asm.c
@@ -745,6 +745,7 @@ expand_string (const char *in, int first_only)
 		  break;
 		case '(':
 		  depth++;
+		  /* Fall through.  */
 		default:
 		  args[narg].len++;
 		  break;
diff --git a/opcodes/ns32k-dis.c b/opcodes/ns32k-dis.c
index dd52cff..b14d5d7 100644
--- a/opcodes/ns32k-dis.c
+++ b/opcodes/ns32k-dis.c
@@ -472,6 +472,7 @@ print_insn_arg (int d,
     case 'f':
       /* A "gen" operand but 5 bits from the end of instruction.  */
       ioffset -= 5;
+      /* Fall through.  */
     case 'Z':
     case 'F':
     case 'L':
diff --git a/opcodes/sh-dis.c b/opcodes/sh-dis.c
index 1f8dc8a..7af514b 100644
--- a/opcodes/sh-dis.c
+++ b/opcodes/sh-dis.c
@@ -836,6 +836,7 @@ print_insn_sh (bfd_vma memaddr, struct disassemble_info *info)
 		  fprintf_fn (stream, "xd%d", rn & ~1);
 		  break;
 		}
+	      /* Fall through.  */
 	    case D_REG_N:
 	      fprintf_fn (stream, "dr%d", rn);
 	      break;
@@ -845,6 +846,7 @@ print_insn_sh (bfd_vma memaddr, struct disassemble_info *info)
 		  fprintf_fn (stream, "xd%d", rm & ~1);
 		  break;
 		}
+	      /* Fall through.  */
 	    case D_REG_M:
 	      fprintf_fn (stream, "dr%d", rm);
 	      break;
diff --git a/opcodes/tic4x-dis.c b/opcodes/tic4x-dis.c
index c35e050..92c9dcb 100644
--- a/opcodes/tic4x-dis.c
+++ b/opcodes/tic4x-dis.c
@@ -467,6 +467,7 @@ tic4x_print_op (struct disassemble_info *info,
                 return 0;
               break;
             }
+	  /* Fall through.  */
 
 	case 'J': /* Indirect (short) 8--15.  */
 	  if (! tic4x_print_indirect (info, INDIRECT_SHORT,
diff --git a/opcodes/tic6x-dis.c b/opcodes/tic6x-dis.c
index ec1dcc1..f642656 100644
--- a/opcodes/tic6x-dis.c
+++ b/opcodes/tic6x-dis.c
@@ -1075,6 +1075,7 @@ print_insn_tic6x (bfd_vma addr, struct disassemble_info *info)
 		case tic6x_coding_mem_offset_minus_one_noscale:
 		case tic6x_coding_mem_offset_minus_one:
 		  fld_val += 1;
+		  /* Fall through.  */
 		case tic6x_coding_mem_offset_noscale:
 		case tic6x_coding_mem_offset:
 		  mem_offset = fld_val;
diff --git a/opcodes/vax-dis.c b/opcodes/vax-dis.c
index 937c452..0aec812 100644
--- a/opcodes/vax-dis.c
+++ b/opcodes/vax-dis.c
@@ -296,6 +296,7 @@ print_insn_mode (const char *d,
       break;
     case 0xB0: /* Displacement byte deferred:	*displ(Rn).  */
       (*info->fprintf_func) (info->stream, "*");
+      /* Fall through.  */
     case 0xA0: /* Displacement byte:		displ(Rn).  */
       if (reg == 0xF)
 	(*info->print_address_func) (addr + 2 + NEXTBYTE (p), info);
@@ -305,6 +306,7 @@ print_insn_mode (const char *d,
       break;
     case 0xD0: /* Displacement word deferred:	*displ(Rn).  */
       (*info->fprintf_func) (info->stream, "*");
+      /* Fall through.  */
     case 0xC0: /* Displacement word:		displ(Rn).  */
       if (reg == 0xF)
 	(*info->print_address_func) (addr + 3 + NEXTWORD (p), info);
@@ -314,6 +316,7 @@ print_insn_mode (const char *d,
       break;
     case 0xF0: /* Displacement long deferred:	*displ(Rn).  */
       (*info->fprintf_func) (info->stream, "*");
+      /* Fall through.  */
     case 0xE0: /* Displacement long:		displ(Rn).  */
       if (reg == 0xF)
 	(*info->print_address_func) (addr + 5 + NEXTLONG (p), info);