x86-64.net

AMD (high performance)

Zen+

AMD Zen+ (2018) supports x86-64-v3.

x86-64 level
x86-64-v3
Vendor
AMD
First products
2018
Products
Ryzen 2000 desktop; Ryzen Threadripper 2000; Ryzen Embedded R2000
Segments
desktopworkstationembedded
GCC target
-march=znver1
Optimization
Optimizing code for Zen and Zen+

AMD's improved Zen core, made on a 12 nm process. GCC detects it as -march=znver1, the instruction set of Zen.

Product lines

The product lines built on Zen+, 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
Ryzen 2000desktopAM4ir.amd.com
Ryzen Threadripper 2000workstationsTR4ir.amd.com
Ryzen Embedded R2000embeddedFP5 (BGA)amd.com

Why not x86-64-v4?

Zen+ lacks AVX512BW, AVX512CD, AVX512DQ, AVX512F and AVX512VL, all of which x86-64-v4 requires.

Feature checklist

Features required by each x86-64 level and whether Zen+ has them. OSFXSR and OSXSAVE are set by the operating system; the table checks the hardware features they depend on.
FeatureZen+Enumerated 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
AVXYesCPUID.01H:ECX[28]avx
AVX2YesCPUID.(EAX=07H,ECX=0):EBX[5]avx2
BMI1YesCPUID.(EAX=07H,ECX=0):EBX[3]bmi1
BMI2YesCPUID.(EAX=07H,ECX=0):EBX[8]bmi2
F16CYesCPUID.01H:ECX[29]f16c
FMAYesCPUID.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 Zen+, in all of its models or in some of them.

Sources

  1. GCC -march=znver1 (processor alias table)
  2. 2nd Generation AMD Ryzen Desktop Processors Deliver Best-in-Class Compute Performance and Even Faster Gaming Framerates than Previous Generation (AMD press release, April 19, 2018): The 12nm “Zen+” core, an improvement on the original “Zen” architecture.
  3. Linux 7.3 drivers/hwmon/k10temp.c: Family 17h model 08h is Zen+
  4. GCC common/config/i386/cpuinfo.h: Family 17h models up to 1Fh are znver1