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Remove neonfp attribute and instead set default based on CPU string. Add -arm-use-neon-fp to override the default.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83218 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Goodwin
2009-10-01 22:19:57 +00:00
parent e4250396ea
commit 9843a93e83
21 changed files with 40 additions and 37 deletions
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5
lib/Target/ARM/ARM.td
View File

@@ -40,9 +40,6 @@ 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.
@@ -105,7 +102,7 @@ def : ProcNoItin<"arm1156t2f-s", [ArchV6T2, FeatureThumb2, FeatureVFP2]>;
// V7 Processors.
def : Processor<"cortex-a8", CortexA8Itineraries,
[ArchV7A, FeatureThumb2, FeatureNEON, FeatureNEONFP]>;
[ArchV7A, FeatureThumb2, FeatureNEON]>;
def : ProcNoItin<"cortex-a9", [ArchV7A, FeatureThumb2, FeatureNEON]>;
//===----------------------------------------------------------------------===//

8
lib/Target/ARM/ARMSubtarget.cpp
View File

@@ -21,12 +21,16 @@ using namespace llvm;
static cl::opt<bool>
ReserveR9("arm-reserve-r9", cl::Hidden,
cl::desc("Reserve R9, making it unavailable as GPR"));
static cl::opt<bool>
UseNEONFP("arm-use-neon-fp",
cl::desc("Use NEON for single-precision FP"),
cl::init(false), cl::Hidden);
ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
bool isThumb)
: ARMArchVersion(V4T)
, ARMFPUType(None)
, UseNEONForSinglePrecisionFP(false)
, UseNEONForSinglePrecisionFP(UseNEONFP)
, IsThumb(isThumb)
, ThumbMode(Thumb1)
, PostRAScheduler(false)
@@ -97,6 +101,8 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
// Set CPU specific features.
if (CPUString == "cortex-a8") {
PostRAScheduler = true;
if (UseNEONFP.getPosition() == 0)
UseNEONForSinglePrecisionFP = true;
}
}