char c[12];
} text;
- GetX86CpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1);
-
- unsigned MaxLeaf = EAX;
- bool HasSSE3 = (ECX & 0x1);
- bool HasSSE41 = (ECX & 0x80000);
- // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
+ unsigned MaxLeaf;
+ GetX86CpuIDAndInfo(0, &MaxLeaf, text.u+0, text.u+2, text.u+1);
+
+ bool HasMMX = (EDX >> 23) & 1;
+ bool HasSSE = (EDX >> 25) & 1;
+ bool HasSSE2 = (EDX >> 26) & 1;
+ bool HasSSE3 = (ECX >> 0) & 1;
+ bool HasSSSE3 = (ECX >> 9) & 1;
+ bool HasSSE41 = (ECX >> 19) & 1;
+ bool HasSSE42 = (ECX >> 20) & 1;
+ bool HasMOVBE = (ECX >> 22) & 1;
+ // If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
// indicates that the AVX registers will be saved and restored on context
// switch, then we have full AVX support.
const unsigned AVXBits = (1 << 27) | (1 << 28);
bool HasAVX = ((ECX & AVXBits) == AVXBits) && !GetX86XCR0(&EAX, &EDX) &&
((EAX & 0x6) == 0x6);
- bool HasAVX2 = HasAVX && MaxLeaf >= 0x7 &&
- !GetX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX) &&
- (EBX & 0x20);
+ bool HasAVX512Save = HasAVX && ((EAX & 0xe0) == 0xe0);
+ bool HasLeaf7 = MaxLeaf >= 0x7 &&
+ !GetX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX);
+ bool HasADX = HasLeaf7 && ((EBX >> 19) & 1);
+ bool HasAVX2 = HasAVX && HasLeaf7 && (EBX & 0x20);
+ bool HasAVX512 = HasLeaf7 && HasAVX512Save && ((EBX >> 16) & 1);
+
GetX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
bool Em64T = (EDX >> 29) & 0x1;
bool HasTBM = (ECX >> 21) & 0x1;
// 45nm: Penryn , Wolfdale, Yorkfield (XE)
case 29: // Intel Xeon processor MP. All processors are manufactured using
// the 45 nm process.
- // Not all Penryn processors support SSE 4.1 (such as the Pentium brand)
- return HasSSE41 ? "penryn" : "core2";
+ return "penryn";
case 26: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 45 nm process.
case 42: // Intel Core i7 processor. All processors are manufactured
// using the 32 nm process.
case 45:
- // Not all Sandy Bridge processors support AVX (such as the Pentium
- // versions instead of the i7 versions).
- return HasAVX ? "sandybridge" : "nehalem";
+ return "sandybridge";
// Ivy Bridge:
case 58:
case 62: // Ivy Bridge EP
- // Not all Ivy Bridge processors support AVX (such as the Pentium
- // versions instead of the i7 versions).
- return HasAVX ? "ivybridge" : "nehalem";
+ return "ivybridge";
// Haswell:
case 60:
case 63:
case 69:
case 70:
- // Not all Haswell processors support AVX2 (such as the Pentium
- // versions instead of the i7 versions).
- return HasAVX2 ? "haswell" : "nehalem";
+ return "haswell";
// Broadwell:
case 61:
- // Not all Broadwell processors support AVX2 (such as the Pentium
- // versions instead of the i7 versions).
- return HasAVX2 ? "broadwell" : "nehalem";
+ case 71:
+ return "broadwell";
+
+ // Skylake:
+ case 78:
+ case 94:
+ return "skylake";
case 28: // Most 45 nm Intel Atom processors
case 38: // 45 nm Atom Lincroft
case 55:
case 74:
case 77:
+ case 90:
+ case 93:
return "silvermont";
- default: return (Em64T) ? "x86-64" : "i686";
+ default: // Unknown family 6 CPU, try to guess.
+ if (HasAVX512)
+ return "knl";
+ if (HasADX)
+ return "broadwell";
+ if (HasAVX2)
+ return "haswell";
+ if (HasAVX)
+ return "sandybridge";
+ if (HasSSE42)
+ return HasMOVBE ? "silvermont" : "nehalem";
+ if (HasSSE41)
+ return "penryn";
+ if (HasSSSE3)
+ return HasMOVBE ? "bonnell" : "core2";
+ if (Em64T)
+ return "x86-64";
+ if (HasSSE2)
+ return "pentium-m";
+ if (HasSSE)
+ return "pentium3";
+ if (HasMMX)
+ return "pentium2";
+ return "pentiumpro";
}
case 15: {
switch (Model) {
StringRef Str(buffer, CPUInfoSize);
SmallVector<StringRef, 32> Lines;
Str.split(Lines, "\n");
+
+ // Look for the CPU features.
+ SmallVector<StringRef, 32> CPUFeatures;
+ for (unsigned I = 0, E = Lines.size(); I != E; ++I)
+ if (Lines[I].startswith("features")) {
+ size_t Pos = Lines[I].find(":");
+ if (Pos != StringRef::npos) {
+ Lines[I].drop_front(Pos + 1).split(CPUFeatures, ' ');
+ break;
+ }
+ }
+
+ // We need to check for the presence of vector support independently of
+ // the machine type, since we may only use the vector register set when
+ // supported by the kernel (and hypervisor).
+ bool HaveVectorSupport = false;
+ for (unsigned I = 0, E = CPUFeatures.size(); I != E; ++I) {
+ if (CPUFeatures[I] == "vx")
+ HaveVectorSupport = true;
+ }
+
+ // Now check the processor machine type.
for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
if (Lines[I].startswith("processor ")) {
size_t Pos = Lines[I].find("machine = ");
Pos += sizeof("machine = ") - 1;
unsigned int Id;
if (!Lines[I].drop_front(Pos).getAsInteger(10, Id)) {
+ if (Id >= 2964 && HaveVectorSupport)
+ return "z13";
if (Id >= 2827)
return "zEC12";
if (Id >= 2817)
// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
// indicates that the AVX registers will be saved and restored on context
// switch, then we have full AVX support.
- bool HasAVX = ((ECX >> 27) & 1) && ((ECX >> 28) & 1) &&
- !GetX86XCR0(&EAX, &EDX) && ((EAX & 0x6) == 0x6);
- Features["avx"] = HasAVX;
- Features["fma"] = HasAVX && (ECX >> 12) & 1;
- Features["f16c"] = HasAVX && (ECX >> 29) & 1;
+ bool HasAVXSave = ((ECX >> 27) & 1) && ((ECX >> 28) & 1) &&
+ !GetX86XCR0(&EAX, &EDX) && ((EAX & 0x6) == 0x6);
+ Features["avx"] = HasAVXSave;
+ Features["fma"] = HasAVXSave && (ECX >> 12) & 1;
+ Features["f16c"] = HasAVXSave && (ECX >> 29) & 1;
+
+ // Only enable XSAVE if OS has enabled support for saving YMM state.
+ Features["xsave"] = HasAVXSave && (ECX >> 26) & 1;
// AVX512 requires additional context to be saved by the OS.
- bool HasAVX512Save = HasAVX && ((EAX & 0xe0) == 0xe0);
+ bool HasAVX512Save = HasAVXSave && ((EAX & 0xe0) == 0xe0);
unsigned MaxExtLevel;
GetX86CpuIDAndInfo(0x80000000, &MaxExtLevel, &EBX, &ECX, &EDX);
Features["lzcnt"] = HasExtLeaf1 && ((ECX >> 5) & 1);
Features["sse4a"] = HasExtLeaf1 && ((ECX >> 6) & 1);
Features["prfchw"] = HasExtLeaf1 && ((ECX >> 8) & 1);
- Features["xop"] = HasAVX && HasExtLeaf1 && ((ECX >> 11) & 1);
- Features["fma4"] = HasAVX && HasExtLeaf1 && ((ECX >> 16) & 1);
+ Features["xop"] = HasExtLeaf1 && ((ECX >> 11) & 1) && HasAVXSave;
+ Features["fma4"] = HasExtLeaf1 && ((ECX >> 16) & 1) && HasAVXSave;
Features["tbm"] = HasExtLeaf1 && ((ECX >> 21) & 1);
bool HasLeaf7 = MaxLevel >= 7 &&
!GetX86CpuIDAndInfoEx(0x7, 0x0, &EAX, &EBX, &ECX, &EDX);
// AVX2 is only supported if we have the OS save support from AVX.
- Features["avx2"] = HasAVX && HasLeaf7 && (EBX >> 5) & 1;
+ Features["avx2"] = HasAVXSave && HasLeaf7 && ((EBX >> 5) & 1);
Features["fsgsbase"] = HasLeaf7 && ((EBX >> 0) & 1);
Features["bmi"] = HasLeaf7 && ((EBX >> 3) & 1);
Features["avx512bw"] = HasLeaf7 && ((EBX >> 30) & 1) && HasAVX512Save;
Features["avx512vl"] = HasLeaf7 && ((EBX >> 31) & 1) && HasAVX512Save;
+ bool HasLeafD = MaxLevel >= 0xd &&
+ !GetX86CpuIDAndInfoEx(0xd, 0x1, &EAX, &EBX, &ECX, &EDX);
+
+ // Only enable XSAVE if OS has enabled support for saving YMM state.
+ Features["xsaveopt"] = HasAVXSave && HasLeafD && ((EAX >> 0) & 1);
+ Features["xsavec"] = HasAVXSave && HasLeafD && ((EAX >> 1) & 1);
+ Features["xsaves"] = HasAVXSave && HasLeafD && ((EAX >> 3) & 1);
+
return true;
}
#elif defined(__linux__) && (defined(__arm__) || defined(__aarch64__))
// Look for the CPU features.
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
if (Lines[I].startswith("Features")) {
- Lines[I].split(CPUFeatures, " ");
+ Lines[I].split(CPUFeatures, ' ');
break;
}
projects / oota-llvm.git / blobdiff