[ARM/AArch64] Improve modeled latency between FP operations and FP->GP register moves

	* config/arm/cortex-a15-neon.md (cortex_a15_vfp_to_from_gp):
	Split into...
	(cortex_a15_gp_to_vfp): ...This.
	(cortex_a15_fp_to_gp): ...And this.
	Define and comment bypass from vfp operations to fp->gp moves.

From-SVN: r217725

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a15197e..4a825c1 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2014-11-18  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       * config/arm/cortex-a15-neon.md (cortex_a15_vfp_to_from_gp):
+       Split into...
+       (cortex_a15_gp_to_vfp): ...This.
+       (cortex_a15_fp_to_gp): ...And this.
+       Define and comment bypass from vfp operations to fp->gp moves.
+
 2014-11-18  Martin Liska  <mliska@suse.cz>
 
        * var-tracking.c (vt_find_locations): New fibonacci_node is used.

diff --git a/gcc/config/arm/cortex-a15-neon.md b/gcc/config/arm/cortex-a15-neon.md
index 02d4a53..bc09cd6 100644 (file)
--- a/gcc/config/arm/cortex-a15-neon.md
+++ b/gcc/config/arm/cortex-a15-neon.md
@@ -655,10 +655,20 @@
        (eq_attr "type" "fmov"))
   "ca15_issue1,ca15_cx_perm")
 
-(define_insn_reservation "cortex_a15_vfp_to_from_gp" 5
+(define_insn_reservation "cortex_a15_gp_to_vfp" 5
   (and (eq_attr "tune" "cortexa15")
-       (eq_attr "type" "f_mcr, f_mcrr, f_mrc, f_mrrc"))
-  "ca15_issue1,ca15_ls1+ca15_ls2")
+       (eq_attr "type" "f_mcr, f_mcrr"))
+  "ca15_issue1,ca15_ls")
+
+(define_insn_reservation "cortex_a15_mov_vfp_to_gp" 5
+  (and (eq_attr "tune" "cortexa15")
+       (eq_attr "type" "f_mrc, f_mrrc"))
+  "ca15_issue1,ca15_ls")
+
+;; Moves from floating point registers to general purpose registers
+;; induce additional latency.
+(define_bypass 10 "cortex_a15_vfp*, cortex_a15_neon*, cortex_a15_gp_to_vfp" "cortex_a15_mov_vfp_to_gp")
+
 
 (define_insn_reservation "cortex_a15_vfp_ariths" 7
   (and (eq_attr "tune" "cortexa15")