[ARM] Reduce size of arm1020e automaton

	* config/arm/arm1020e.md (1020call_op): Reduce reservation
	duration.
	(v10_fdivs): Likewise.
	(v10_fdivd): Likewise.

From-SVN: r234422

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f78ff93a9a40cfc5b424084b6569ee10f8361368..f4251133922f0ccf1da527a42caf0bbf18be3040 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-03-23  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       * config/arm/arm1020e.md (1020call_op): Reduce reservation
+       duration.
+       (v10_fdivs): Likewise.
+       (v10_fdivd): Likewise.
+
 2016-03-23  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
        PR driver/70132

diff --git a/gcc/config/arm/arm1020e.md b/gcc/config/arm/arm1020e.md
index 7cdab57ddb34346fa21f2935d2bc29c4f0b827d8..84a300d804541d63e82c08f517f4af136df2d642 100644 (file)
--- a/gcc/config/arm/arm1020e.md
+++ b/gcc/config/arm/arm1020e.md
@@ -246,13 +246,14 @@
       (eq_attr "type" "branch"))
  "1020a_e")
 
-;; The latency for a call is not predictable.  Therefore, we use 32 as
-;; roughly equivalent to positive infinity.
+;; The latency for a call is not predictable.  Therefore, we model as blocking
+;; execution for a number of cycles but we can't do anything more accurate
+;; than that.
 
 (define_insn_reservation "1020call_op" 32
  (and (eq_attr "tune" "arm1020e,arm1022e")
       (eq_attr "type" "call"))
- "1020a_e*32")
+ "1020a_e*4")
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; VFP
@@ -300,12 +301,12 @@
 (define_insn_reservation "v10_fdivs" 18
  (and (eq_attr "vfp10" "yes")
       (eq_attr "type" "fdivs, fsqrts"))
- "1020a_e+v10_ds*14")
+ "1020a_e+v10_ds*4")
 
 (define_insn_reservation "v10_fdivd" 32
  (and (eq_attr "vfp10" "yes")
       (eq_attr "type" "fdivd, fsqrtd"))
- "1020a_e+v10_fmac+v10_ds*28")
+ "1020a_e+v10_fmac+v10_ds*4")
 
 (define_insn_reservation "v10_floads" 4
  (and (eq_attr "vfp10" "yes")