From 1f0e404c87675ce75e34bcd91395c660fe1d4ac1 Mon Sep 17 00:00:00 2001
From: David Goodwin <david_goodwin@apple.com>
Date: Wed, 5 Aug 2009 16:01:19 +0000
Subject: [PATCH] By default, for cortex-a8 use NEON for single-precision FP.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78200 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARM.td         | 8 ++++----
 lib/Target/ARM/ARMSubtarget.h | 4 +++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/lib/Target/ARM/ARM.td b/lib/Target/ARM/ARM.td
index 172c7de6259..ce28149b54f 100644
--- a/lib/Target/ARM/ARM.td
+++ b/lib/Target/ARM/ARM.td
@@ -32,9 +32,6 @@ def ArchV6T2    : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2",
                                    "ARM v6t2">;
 def ArchV7A     : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
                                    "ARM v7A">;
-def FeatureNEONFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
-                                     "true",
-                                     "Use NEON for single-precision FP">;
 def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
                                    "Enable VFP2 instructions">;
 def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
@@ -43,6 +40,9 @@ def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
                                    "Enable NEON instructions">;
 def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
                                      "Enable Thumb2 instructions">;
+def FeatureNEONFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP",
+                                     "true",
+                                     "Use NEON for single-precision FP">;
 
 //===----------------------------------------------------------------------===//
 // ARM Processors supported.
@@ -113,7 +113,7 @@ def : Processor<"arm1156t2f-s",     V6Itineraries,
 
 // V7 Processors.
 def : Processor<"cortex-a8",        CortexA8Itineraries,
-                [ArchV7A, FeatureThumb2, FeatureNEON]>;
+                [ArchV7A, FeatureThumb2, FeatureNEON, FeatureNEONFP]>;
 def : Processor<"cortex-a9",        V7Itineraries,
                 [ArchV7A, FeatureThumb2, FeatureNEON]>;
 
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index 6d1ffc44206..b56b55e200a 100644
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -42,7 +42,9 @@ protected:
   /// ARMFPUType - Floating Point Unit type.
   ARMFPEnum ARMFPUType;
 
-  /// UseNEONForSinglePrecisionFP - if NEON is available use for FP
+  /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been
+  /// specified. Use the method useNEONForSinglePrecisionFP() to
+  /// determine if NEON should actually be used.
   bool UseNEONForSinglePrecisionFP;
 
   /// IsThumb - True if we are in thumb mode, false if in ARM mode.