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Add feature flags for AVX and FMA and fix some SSE4A feature flag

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initialization problems.

llvm-svn: 74350
This commit is contained in:
David Greene 2009-06-26 22:46:54 +00:00
parent 4997a459c7
commit d33e8e7d83
4 changed files with 38 additions and 3 deletions
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10
lib/Target/X86/X86.td
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@ -55,6 +55,13 @@ def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
def FeatureSSE4A : SubtargetFeature<"sse4a", "HasSSE4A", "true",
"Support SSE 4a instructions">;
def FeatureAVX : SubtargetFeature<"avx", "HasAVX", "true",
"Enable AVX instructions">;
def FeatureFMA3 : SubtargetFeature<"fma3", "HasFMA3", "true",
"Enable three-operand fused multiple-add">;
def FeatureFMA4 : SubtargetFeature<"fma4", "HasFMA4", "true",
"Enable four-operand fused multiple-add">;
//===----------------------------------------------------------------------===//
// X86 processors supported.
//===----------------------------------------------------------------------===//
@ -82,6 +89,9 @@ def : Proc<"core2", [FeatureSSSE3, Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"penryn", [FeatureSSE41, Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"atom", [FeatureSSE3, Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"corei7", [FeatureSSE42, Feature64Bit, FeatureSlowBTMem]>;
def : Proc<"nehalem", [FeatureSSE42, Feature64Bit, FeatureSlowBTMem]>;
// Sandy Bridge does not have FMA
def : Proc<"sandybridge", [FeatureSSE42, FeatureAVX, Feature64Bit]>;
def : Proc<"k6", [FeatureMMX]>;
def : Proc<"k6-2", [FeatureMMX, Feature3DNow]>;

4
lib/Target/X86/X86InstrInfo.td
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@ -236,6 +236,10 @@ def HasSSE3 : Predicate<"Subtarget->hasSSE3()">;
def HasSSSE3 : Predicate<"Subtarget->hasSSSE3()">;
def HasSSE41 : Predicate<"Subtarget->hasSSE41()">;
def HasSSE42 : Predicate<"Subtarget->hasSSE42()">;
def HasSSE4A : Predicate<"Subtarget->hasSSE4A()">;
def HasAVX : Predicate<"Subtarget->hasAVX()">;
def HasFMA3 : Predicate<"Subtarget->hasFMA3()">;
def HasFMA4 : Predicate<"Subtarget->hasFMA4()">;
def FPStackf32 : Predicate<"!Subtarget->hasSSE1()">;
def FPStackf64 : Predicate<"!Subtarget->hasSSE2()">;
def In32BitMode : Predicate<"!Subtarget->is64Bit()">;

9
lib/Target/X86/X86Subtarget.cpp
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@ -207,6 +207,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
bool IsIntel = memcmp(text.c, "GenuineIntel", 12) == 0;
bool IsAMD = !IsIntel && memcmp(text.c, "AuthenticAMD", 12) == 0;
HasFMA3 = IsIntel && ((ECX >> 12) & 0x1);
HasAVX = ((ECX >> 28) & 0x1);
if (IsIntel || IsAMD) {
// Determine if bit test memory instructions are slow.
unsigned Family = 0;
@ -217,6 +221,7 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
HasX86_64 = (EDX >> 29) & 0x1;
HasSSE4A = IsAMD && ((ECX >> 6) & 0x1);
HasFMA4 = IsAMD && ((ECX >> 16) & 0x1);
}
}
@ -342,6 +347,10 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
, X86SSELevel(NoMMXSSE)
, X863DNowLevel(NoThreeDNow)
, HasX86_64(false)
, HasSSE4A(false)
, HasAVX(false)
, HasFMA3(false)
, HasFMA4(false)
, IsBTMemSlow(false)
, DarwinVers(0)
, IsLinux(false)

18
lib/Target/X86/X86Subtarget.h
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@ -64,12 +64,21 @@ protected:
///
bool HasX86_64;
/// IsBTMemSlow - True if BT (bit test) of memory instructions are slow.
bool IsBTMemSlow;
/// HasSSE4A - True if the processor supports SSE4A instructions.
bool HasSSE4A;
/// HasAVX - Target has AVX instructions
bool HasAVX;
/// HasFMA3 - Target has 3-operand fused multiply-add
bool HasFMA3;
/// HasFMA4 - Target has 4-operand fused multiply-add
bool HasFMA4;
/// IsBTMemSlow - True if BT (bit test) of memory instructions are slow.
bool IsBTMemSlow;
/// DarwinVers - Nonzero if this is a darwin platform: the numeric
/// version of the platform, e.g. 8 = 10.4 (Tiger), 9 = 10.5 (Leopard), etc.
unsigned char DarwinVers; // Is any darwin-x86 platform.
@ -133,6 +142,9 @@ public:
bool hasSSE4A() const { return HasSSE4A; }
bool has3DNow() const { return X863DNowLevel >= ThreeDNow; }
bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; }
bool hasAVX() const { return hasAVX(); }
bool hasFMA3() const { return HasFMA3; }
bool hasFMA4() const { return HasFMA4; }
bool isBTMemSlow() const { return IsBTMemSlow; }