[llvm] r191324 - Adding a feature flag to the llvm backend for x86 TBM instruction set.
Yunzhong Gao
Yunzhong_Gao at playstation.sony.com
Tue Sep 24 11:21:53 PDT 2013
Author: ygao
Date: Tue Sep 24 13:21:52 2013
New Revision: 191324
URL: http://llvm.org/viewvc/llvm-project?rev=191324&view=rev
Log:
Adding a feature flag to the llvm backend for x86 TBM instruction set.
Adding TBM feature to bdver2 processor; piledriver supports this instruction set
according to the following document:
http://developer.amd.com/wordpress/media/2012/10/New-Bulldozer-and-Piledriver-Instructions.pdf
Phabricator code review is located here: http://llvm-reviews.chandlerc.com/D1692
Modified:
llvm/trunk/lib/Target/X86/X86.td
llvm/trunk/lib/Target/X86/X86Subtarget.cpp
llvm/trunk/lib/Target/X86/X86Subtarget.h
Modified: llvm/trunk/lib/Target/X86/X86.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86.td?rev=191324&r1=191323&r2=191324&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86.td (original)
+++ llvm/trunk/lib/Target/X86/X86.td Tue Sep 24 13:21:52 2013
@@ -117,6 +117,8 @@ def FeatureVectorUAMem : SubtargetFeatur
def FeatureAES : SubtargetFeature<"aes", "HasAES", "true",
"Enable AES instructions",
[FeatureSSE2]>;
+def FeatureTBM : SubtargetFeature<"tbm", "HasTBM", "true",
+ "Enable TBM instructions">;
def FeatureMOVBE : SubtargetFeature<"movbe", "HasMOVBE", "true",
"Support MOVBE instruction">;
def FeatureRDRAND : SubtargetFeature<"rdrnd", "HasRDRAND", "true",
@@ -304,7 +306,8 @@ def : Proc<"bdver1", [FeatureXO
def : Proc<"bdver2", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
FeatureAES, FeaturePCLMUL,
FeatureF16C, FeatureLZCNT,
- FeaturePOPCNT, FeatureBMI, FeatureFMA]>;
+ FeaturePOPCNT, FeatureBMI, FeatureTBM,
+ FeatureFMA]>;
def : Proc<"geode", [Feature3DNowA]>;
def : Proc<"winchip-c6", [FeatureMMX]>;
Modified: llvm/trunk/lib/Target/X86/X86Subtarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.cpp?rev=191324&r1=191323&r2=191324&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.cpp Tue Sep 24 13:21:52 2013
@@ -384,6 +384,10 @@ void X86Subtarget::AutoDetectSubtargetFe
ToggleFeature(X86::FeatureSHA);
}
}
+ if (IsAMD && ((ECX >> 21) & 0x1)) {
+ HasTBM = true;
+ ToggleFeature(X86::FeatureTBM);
+ }
}
}
@@ -492,6 +496,7 @@ void X86Subtarget::initializeEnvironment
HasFMA = false;
HasFMA4 = false;
HasXOP = false;
+ HasTBM = false;
HasMOVBE = false;
HasRDRAND = false;
HasF16C = false;
Modified: llvm/trunk/lib/Target/X86/X86Subtarget.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.h?rev=191324&r1=191323&r2=191324&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.h (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.h Tue Sep 24 13:21:52 2013
@@ -97,6 +97,9 @@ protected:
/// HasXOP - Target has XOP instructions
bool HasXOP;
+ /// HasTBM - Target has TBM instructions.
+ bool HasTBM;
+
/// HasMOVBE - True if the processor has the MOVBE instruction.
bool HasMOVBE;
@@ -274,6 +277,7 @@ public:
// FIXME: Favor FMA when both are enabled. Is this the right thing to do?
bool hasFMA4() const { return HasFMA4 && !HasFMA; }
bool hasXOP() const { return HasXOP; }
+ bool hasTBM() const { return HasTBM; }
bool hasMOVBE() const { return HasMOVBE; }
bool hasRDRAND() const { return HasRDRAND; }
bool hasF16C() const { return HasF16C; }
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