x86-64.net

Zhaoxin

LuJiaZui

Zhaoxin LuJiaZui (2018) supports x86-64-v2.

x86-64 level
x86-64-v2
Vendor
Zhaoxin
First products
2018
Products
KX-6000, KX-6000G, KX-6900 and KH-30000
Segments
desktopmobileserver
GCC target
-march=lujiazui

Has AVX and F16C, which GCC's -march=lujiazui leaves off, and BMI1, BMI2 and MOVBE, but no AVX2 or FMA, so it stops at x86-64-v2.

Product lines

The product lines built on LuJiaZui, with the market segment the vendor sells each in and the sockets or soldered (BGA) packages its processors come in. Each socket links to the vendor page that states it.
Product lineSegmentSocketSource
KX-6000desktopHFCBGAzhaoxin.com
KX-6000mobileHFCBGAzhaoxin.com
KX-6000GmobileHFCBGAzhaoxin.com
KX-6900desktopHFCBGAzhaoxin.com
KX-6900mobileHFCBGAzhaoxin.com
KH-30000serverHFCBGAzhaoxin.com

Why not x86-64-v3?

LuJiaZui lacks AVX, AVX2, F16C and FMA, all of which x86-64-v3 requires.

Feature checklist

Features required by each x86-64 level and whether LuJiaZui has them. OSFXSR and OSXSAVE are set by the operating system; the table checks the hardware features they depend on.
FeatureLuJiaZuiEnumerated byLinux flag
x86-64-v1
CMOVYesCPUID.01H:EDX[15]cmov
CX8YesCPUID.01H:EDX[8]cx8
FPUYesCPUID.01H:EDX[0]fpu
FXSRYesCPUID.01H:EDX[24]fxsr
MMXYesCPUID.01H:EDX[23]mmx
OSFXSR via FXSRYesCPUID.01H:EDX[24]fxsr
SCEYesCPUID.80000001H:EDX[11]syscall
SSEYesCPUID.01H:EDX[25]sse
SSE2YesCPUID.01H:EDX[26]sse2
x86-64-v2
CMPXCHG16BYesCPUID.01H:ECX[13]cx16
LAHF-SAHFYesCPUID.80000001H:ECX[0]lahf_lm
POPCNTYesCPUID.01H:ECX[23]popcnt
SSE3YesCPUID.01H:ECX[0]pni
SSE4.1YesCPUID.01H:ECX[19]sse4_1
SSE4.2YesCPUID.01H:ECX[20]sse4_2
SSSE3YesCPUID.01H:ECX[9]ssse3
x86-64-v3
AVXNoCPUID.01H:ECX[28]avx
AVX2NoCPUID.(EAX=07H,ECX=0):EBX[5]avx2
BMI1YesCPUID.(EAX=07H,ECX=0):EBX[3]bmi1
BMI2YesCPUID.(EAX=07H,ECX=0):EBX[8]bmi2
F16CNoCPUID.01H:ECX[29]f16c
FMANoCPUID.01H:ECX[12]fma
LZCNTYesCPUID.80000001H:ECX[5]abm
MOVBEYesCPUID.01H:ECX[22]movbe
OSXSAVE via XSAVEYesCPUID.01H:ECX[26]xsave
x86-64-v4
AVX512FNoCPUID.(EAX=07H,ECX=0):EBX[16]avx512f
AVX512BWNoCPUID.(EAX=07H,ECX=0):EBX[30]avx512bw
AVX512CDNoCPUID.(EAX=07H,ECX=0):EBX[28]avx512cd
AVX512DQNoCPUID.(EAX=07H,ECX=0):EBX[17]avx512dq
AVX512VLNoCPUID.(EAX=07H,ECX=0):EBX[31]avx512vl

Other extensions

Notable extensions outside the x86-64 levels. Vendors sometimes disable these on individual models. Linked names lead to the extension's instructions.

Known vulnerabilities

The CVEs that the sources of the vulnerability list name as affecting LuJiaZui, in all of its models or in some of them.

Sources

  1. GCC -march=lujiazui feature set (PTA_LUJIAZUI)
  2. GCC documentation, -march=lujiazui (gcc/doc/invoke.texi): The CPUs have AVX and F16C, which -march=lujiazui does not enable, for performance reasons.
  3. GCC common/config/i386/cpuinfo.h: Zhaoxin family 7 model 3Bh is lujiazui
  4. Zhaoxin news: a first test of the KX-6000 (from Microcomputer magazine, June 28, 2019): Zhaoxin launched the KX-6000 series, with the “Lujiazui” architecture, in 2018.
  5. Zhaoxin products: the architecture code name of each series: Gives the KX-6000, KX-6000G, KX-6900 and KH-30000 series the code name Lujiazui.
  6. Zhaoxin news: a first test of the Lenovo Kaitian X1 notebook (April 10, 2025): The KX-6000G is based on Zhaoxin’s “Lujiazui” architecture.