--- a/gcc/config/sh/sh4-300.md	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/sh/sh4-300.md	Fri Oct 27 22:46:09 2017 +0900
@@ -1,5 +1,5 @@
 ;; DFA scheduling description for ST40-300.
-;; Copyright (C) 2004, 2006, 2007 Free Software Foundation, Inc.
+;; Copyright (C) 2004-2017 Free Software Foundation, Inc.
 
 ;; This file is part of GCC.
 
@@ -35,26 +35,21 @@
 ;; Since SH4 is a dual issue machine,it is as if there are two
 ;; units so that any insn can be processed by either one
 ;; of the decoding unit.
-
 (define_cpu_unit "sh4_300_pipe_01,sh4_300_pipe_02" "sh4_300_inst_pipeline")
 
 ;; The floating point units.
-
 (define_cpu_unit "sh4_300_fpt,sh4_300_fpu,sh4_300_fds" "sh4_300_fpu_pipe")
 
 ;; integer multiplier unit
-
 (define_cpu_unit "sh4_300_mul" "sh4_300_inst_pipeline")
 
 ;; LS unit
-
 (define_cpu_unit "sh4_300_ls" "sh4_300_inst_pipeline")
 
 ;; The address calculator used for branch instructions.
 ;; This will be reserved after "issue" of branch instructions
 ;; and this is to make sure that no two branch instructions
 ;; can be issued in parallel.
-
 (define_cpu_unit "sh4_300_br" "sh4_300_inst_pipeline")
 
 ;; ----------------------------------------------------
@@ -85,7 +80,6 @@
   "sh4_300_issue+sh4_300_mul")
 
 ;; Instructions without specific resource requirements with latency 1.
-
 (define_insn_reservation "sh4_300_simple_arith" 1
   (and (eq_attr "pipe_model" "sh4_300")
        (eq_attr "type" "mt_group,arith,dyn_shift,prset"))
@@ -153,7 +147,6 @@
 ;; or likely and likely not predicted, we might want to fill the delay slot.
 ;; However, there appears to be no machinery to make the compiler
 ;; recognize these scenarios.
-
 (define_insn_reservation "sh4_300_branch"  1
   (and (eq_attr "pipe_model" "sh4_300")
        (eq_attr "type" "cbranch,jump,return,jump_ind"))
@@ -169,8 +162,11 @@
 ;; Group:	CO
 ;; Latency: 	1-5
 ;; Issue Rate: 	1
-
-;; cwb is used for the sequence ocbwb @%0; extu.w %0,%2; or %1,%2; mov.l %0,@%2
+;; cwb is used for the sequence
+;;	ocbwb  @%0
+;;	extu.w %0,%2
+;;	or     %1,%2
+;;	mov.l  %0,@%2
 ;; This description is likely inexact, but this pattern should not actually
 ;; appear when compiling for sh4-300; we should use isbi instead.
 ;; If a -mtune option is added later, we should use the icache array
@@ -197,7 +193,6 @@
 ;; since there are no instructions that contend for memory access early.
 ;; We could, of course, provide exact scheduling information for specific
 ;; sfuncs, if that should prove useful.
-
 (define_insn_reservation "sh4_300_call" 16
   (and (eq_attr "pipe_model" "sh4_300")
        (eq_attr "type" "call,sfunc"))
@@ -265,7 +260,6 @@
        (eq_attr "type" "dfdiv"))
   "sh4_300_issue+sh4_300_fpu+sh4_300_fds,sh4_300_fds*31")
 
-
 ;; ??? We don't really want these for sh4-300.
 ;; this pattern itself is likely to finish in 3 cycles, but also
 ;; to disrupt branch prediction for taken branches for the following