[X86][Btver2] Add (U)COMISD/(U)COMISD scheduler costs

Account for the "+i" integer pipe transfer cost (1cy use of JALU0 for GPR PRF write)

llvm-svn: 328573

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86ScheduleBtVer2.td b/llvm/lib/Target/X86/X86ScheduleBtVer2.td
index c9af75ceed0..502c569f354 100644
--- a/llvm/lib/Target/X86/X86ScheduleBtVer2.td
+++ b/llvm/lib/Target/X86/X86ScheduleBtVer2.td
@@ -647,6 +647,16 @@ def JWriteVMOVNTPYSt: SchedWriteRes<[JFPU1, JSTC, JSAGU]> {
 }
 def : InstRW<[JWriteVMOVNTPYSt], (instrs VMOVNTDQYmr, VMOVNTPDYmr, VMOVNTPSYmr)>;
 
+def JWriteFComi : SchedWriteRes<[JFPU0, JFPA, JALU0]> {
+  let Latency = 3;
+}
+def : InstRW<[JWriteFComi], (instregex "(V)?(U)?COMIS(D|S)rr")>;
+
+def JWriteFComiLd : SchedWriteRes<[JLAGU, JFPU0, JFPA, JALU0]> {
+  let Latency = 8;
+}
+def : InstRW<[JWriteFComiLd], (instregex "(V)?(U)?COMIS(D|S)rm")>;
+
 def JWriteFCmp: SchedWriteRes<[JFPU0, JFPA]> {
   let Latency = 2;
 }