See section 2.5.3 (page 28) of
http://download.majix.org/dec/comp_guide_v2.pdf
2012-02-24 Matt Turner <matts...@gmail.com>
* config/alpha/ev6.md: (define_bypass "ev6_fmul,ev6_fadd"): New.
(define_bypass "ev6_fcmov"): New.
---
gcc/config/alpha/ev6.md | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/gcc/config/alpha/ev6.md b/gcc/config/alpha/ev6.md
index adfe504..a16535a 100644
--- a/gcc/config/alpha/ev6.md
+++ b/gcc/config/alpha/ev6.md
@@ -147,11 +147,15 @@
(eq_attr "type" "fadd,fcpys,fbr"))
"ev6_fa")
+(define_bypass 6 "ev6_fmul,ev6_fadd" "ev6_fst,ev6_ftoi")
+
(define_insn_reservation "ev6_fcmov" 8
(and (eq_attr "tune" "ev6")
(eq_attr "type" "fcmov"))
"ev6_fa,nothing*3,ev6_fa")
+(define_bypass 10 "ev6_fcmov" "ev6_fst,ev6_ftoi")
+
(define_insn_reservation "ev6_fdivsf" 12
(and (eq_attr "tune" "ev6")
(and (eq_attr "type" "fdiv")
--
1.7.3.4
