Enable SSE4.2 instruction support

Other “cpu_flags_x86” USE_EXPAND flag values

Use Flag Description
cpu_flags_x86_avx512_fp16 Use general-purpose numeric operations for 16-bit half-precision instruction set
cpu_flags_x86_avx512_4fmaps Use AVX-512 Fused Multiply-Accumulate Packed Single Precision instruction set
cpu_flags_x86_avx512ifma Use AVX-512 Integer Fused Multiply-Add instruction set
cpu_flags_x86_avx512_vnni Use vector neural network instructions for 8- and 16-bit multiply-add operations
cpu_flags_x86_avx512_vbmi2 Use AVX-512 Vector Bit Manipulation Instructions 2
cpu_flags_x86_avx512_vpopcntdq Use AVX-512 Vector Population Count Doubleword and Quadword instruction set
cpu_flags_x86_avx512_4vnniw Use AVX-512 Vector Neural Network Instructions Word Variable Precision
cpu_flags_x86_vpclmulqdq Use Vector Carry-Less Multiplication of Quadwords instruction set
cpu_flags_x86_avx512_bitalg Use AVX-512 Bit Algorithms instruction set
cpu_flags_x86_avx512_vp2intersect Use AVX-512 Intersect instruction set
cpu_flags_x86_avx512_bf16 Use AVX-512 BFloat16 instruction set
cpu_flags_x86_sse3 Use the SSE3 instruction set ([pni] in cpuinfo, NOT ssse3)
cpu_flags_x86_fma4 Use the Fused Multiply Add 4 instruction set
cpu_flags_x86_mmxext Use the Extended MMX instruction set (a subset of SSE) ([mmxext] or [sse] in cpuinfo)
cpu_flags_x86_sse4_2 Enable SSE4.2 instruction support
cpu_flags_x86_sha Use the SHA-NI instruction set
cpu_flags_x86_xop Enable the XOP instruction set
cpu_flags_x86_avx512vl Use AVX-512 vector-length instructions
cpu_flags_x86_sse4_1 Enable SSE4.1 instruction support
cpu_flags_x86_popcnt Enable popcnt instruction support ([abm] or [popcnt] in cpuinfo)
cpu_flags_x86_padlock Use VIA padlock instructions ([phe] in cpuinfo)
cpu_flags_x86_sse Use the SSE instruction set
cpu_flags_x86_sse2 Use the SSE2 instruction set
cpu_flags_x86_avx Adds support for Advanced Vector Extensions instructions
cpu_flags_x86_avx2 Adds support for Advanced Vector Extensions 2 instructions
cpu_flags_x86_avx512dq Use AVX-512 double- and quad-word instructions
cpu_flags_x86_pclmul Use Carry-less Multiplication instructions ([pclmulqdq] in cpuinfo)
cpu_flags_x86_ssse3 Use the SSSE3 instruction set (NOT sse3/pni)
cpu_flags_x86_aes Enable support for Intel's AES instruction set (AES-NI)
cpu_flags_x86_f16c Adds support for F16C instruction set for converting between half-precision and single-precision floats
cpu_flags_x86_mmx Use the MMX instruction set
cpu_flags_x86_rdrand Use the RDRAND instruction for generating random numbers
cpu_flags_x86_3dnow Use the 3DNow! instruction set
cpu_flags_x86_fma3 Use the Fused Multiply Add 3 instruction set ([fma] in cpuinfo)
cpu_flags_x86_avx512f Adds support for AVX-512 Foundation instructions
cpu_flags_x86_sse4a Enable SSE4a instruction support
cpu_flags_x86_3dnowext Use the Enhanced 3DNow! instruction set

All packages providing a “cpu_flags_x86_sse4_2” USE flag (28)