Intel Nehalem

Why not x86-64-v3?

Nehalem lacks AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE and XSAVE, all of which x86-64-v3 requires.

Feature checklist

Features required by each x86-64 level and whether Nehalem has them. OSFXSR and OSXSAVE are set by the operating system; the table checks the hardware features they depend on.

Feature	Nehalem	Enumerated by	Linux flag
x86-64-v1
CMOV	Yes	`CPUID.01H:EDX[15]`	`cmov`
CX8	Yes	`CPUID.01H:EDX[8]`	`cx8`
FPU	Yes	`CPUID.01H:EDX[0]`	`fpu`
FXSR	Yes	`CPUID.01H:EDX[24]`	`fxsr`
MMX	Yes	`CPUID.01H:EDX[23]`	`mmx`
OSFXSR via FXSR	Yes	`CPUID.01H:EDX[24]`	`fxsr`
SCE	Yes	`CPUID.80000001H:EDX[11]`	`syscall`
SSE	Yes	`CPUID.01H:EDX[25]`	`sse`
SSE2	Yes	`CPUID.01H:EDX[26]`	`sse2`
x86-64-v2
CMPXCHG16B	Yes	`CPUID.01H:ECX[13]`	`cx16`
LAHF-SAHF	Yes	`CPUID.80000001H:ECX[0]`	`lahf_lm`
POPCNT	Yes	`CPUID.01H:ECX[23]`	`popcnt`
SSE3	Yes	`CPUID.01H:ECX[0]`	`pni`
SSE4.1	Yes	`CPUID.01H:ECX[19]`	`sse4_1`
SSE4.2	Yes	`CPUID.01H:ECX[20]`	`sse4_2`
SSSE3	Yes	`CPUID.01H:ECX[9]`	`ssse3`
x86-64-v3
AVX	No	`CPUID.01H:ECX[28]`	`avx`
AVX2	No	`CPUID.(EAX=07H,ECX=0):EBX[5]`	`avx2`
BMI1	No	`CPUID.(EAX=07H,ECX=0):EBX[3]`	`bmi1`
BMI2	No	`CPUID.(EAX=07H,ECX=0):EBX[8]`	`bmi2`
F16C	No	`CPUID.01H:ECX[29]`	`f16c`
FMA	No	`CPUID.01H:ECX[12]`	`fma`
LZCNT	No	`CPUID.80000001H:ECX[5]`	`abm`
MOVBE	No	`CPUID.01H:ECX[22]`	`movbe`
OSXSAVE via XSAVE	No	`CPUID.01H:ECX[26]`	`xsave`
x86-64-v4
AVX512F	No	`CPUID.(EAX=07H,ECX=0):EBX[16]`	`avx512f`
AVX512BW	No	`CPUID.(EAX=07H,ECX=0):EBX[30]`	`avx512bw`
AVX512CD	No	`CPUID.(EAX=07H,ECX=0):EBX[28]`	`avx512cd`
AVX512DQ	No	`CPUID.(EAX=07H,ECX=0):EBX[17]`	`avx512dq`
AVX512VL	No	`CPUID.(EAX=07H,ECX=0):EBX[31]`	`avx512vl`

Why not x86-64-v3?

Feature checklist

Other Intel Core (client) microarchitectures

Sources