Added support for mcpu krait

- krait processor currently modeled with the same features as A9.
- Krait processor additionally has VFP4 (fused multiply add/sub)
and hardware division features enabled.
- krait has currently the same Schedule model as A9
- krait cpu flag is not recognized by the GNU assembler yet,
it is replaced with march=armv7-a to avoid a lower march
from being used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196619 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARM.td b/lib/Target/ARM/ARM.td
index ca2ddfdff3b3c0c72d7cf5db471394def58df25e..23b6626056e0f9fbdcaf07fd773568032d0027c7 100644 (file)
--- a/lib/Target/ARM/ARM.td
+++ b/lib/Target/ARM/ARM.td
@@ -243,6 +243,18 @@ def ProcR5      : SubtargetFeature<"r5", "ARMProcFamily", "CortexR5",
                                     FeatureAvoidPartialCPSR,
                                     FeatureT2XtPk]>;
 
+// FIXME: krait has currently the same features as A9
+// plus VFP4 and hardware division features.
+def ProcKrait   : SubtargetFeature<"krait", "ARMProcFamily", "Krait",
+                                   "Qualcomm ARM processors",
+                                   [FeatureVMLxForwarding,
+                                    FeatureT2XtPk, FeatureFP16,
+                                    FeatureAvoidPartialCPSR,
+                                    FeatureTrustZone,
+                                    FeatureVFP4,
+                                    FeatureHWDiv,
+                                    FeatureHWDivARM]>;
+
 class ProcNoItin<string Name, list<SubtargetFeature> Features>
  : Processor<Name, NoItineraries, Features>;
 
@@ -375,6 +387,13 @@ def : ProcNoItin<"cortex-a57",      [ProcA57, HasV8Ops, FeatureAClass,
                                     FeatureDB, FeatureFPARMv8,
                                     FeatureNEON, FeatureDSPThumb2]>;
 
+// FIXME: krait has currently the same Schedule model as A9
+def : ProcessorModel<"krait",       CortexA9Model,
+                                    [ProcKrait, HasV7Ops,
+                                     FeatureNEON, FeatureDB,
+                                     FeatureDSPThumb2, FeatureHasRAS,
+                                     FeatureAClass]>;
+
 //===----------------------------------------------------------------------===//
 // Register File Description
 //===----------------------------------------------------------------------===//

diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index 8e28a98277d841976b54cfa7dbe8a1e0212c5afe..0c65ea891d17474fe28b6c03f9dddbd590dead5a 100644 (file)
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -609,7 +609,8 @@ void ARMAsmPrinter::emitAttributes() {
 
   std::string CPUString = Subtarget->getCPUString();
 
-  if (CPUString != "generic")
+  // FIXME: remove krait check when GNU tools support krait cpu
+  if (CPUString != "generic" && CPUString != "krait")
     ATS.emitTextAttribute(ARMBuildAttrs::CPU_name, CPUString);
 
   ATS.emitAttribute(ARMBuildAttrs::CPU_arch,

diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index d6e8c81fb76e28783cd1ac1a3f10e4a6343608ef..ca1e5d222d16e0cb8001cb1aab21c8ad64a44efa 100644 (file)
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -32,7 +32,7 @@ class ARMSubtarget : public ARMGenSubtargetInfo {
 protected:
   enum ARMProcFamilyEnum {
     Others, CortexA5, CortexA7, CortexA8, CortexA9, CortexA12, CortexA15, 
-    CortexR5, Swift, CortexA53, CortexA57
+    CortexR5, Swift, CortexA53, CortexA57, Krait
   };
   enum ARMProcClassEnum {
     None, AClass, RClass, MClass
@@ -261,8 +261,9 @@ public:
   bool isCortexA15() const { return ARMProcFamily == CortexA15; }
   bool isSwift()    const { return ARMProcFamily == Swift; }
   bool isCortexM3() const { return CPUString == "cortex-m3"; }
-  bool isLikeA9() const { return isCortexA9() || isCortexA15(); }
+  bool isLikeA9() const { return isCortexA9() || isCortexA15() || isKrait(); }
   bool isCortexR5() const { return ARMProcFamily == CortexR5; }
+  bool isKrait() const { return ARMProcFamily == Krait; }
 
   bool hasARMOps() const { return !NoARM; }