# Copyright 1999-2024 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 # Whenever the flag name does not correspond to /proc/cpuinfo flags, # please put the cpuinfo flag in square brackets. If more than one flag # is specified, any of them will enable the respective USE flag. 3dnow - Use the 3DNow! instruction set 3dnowext - Use the Enhanced 3DNow! instruction set aes - Enable support for Intel's AES instruction set (AES-NI) avx - Adds support for Advanced Vector Extensions instructions avx2 - Adds support for Advanced Vector Extensions 2 instructions avx512_4fmaps - Use AVX-512 Fused Multiply-Accumulate Packed Single Precision instruction set avx512_4vnniw - Use AVX-512 Vector Neural Network Instructions Word Variable Precision avx512_bf16 - Use AVX-512 BFloat16 instruction set avx512_bitalg - Use AVX-512 Bit Algorithms instruction set avx512_fp16 - Use general-purpose numeric operations for 16-bit half-precision instruction set avx512_vbmi2 - Use AVX-512 Vector Bit Manipulation Instructions 2 avx512_vnni - Use vector neural network instructions for 8- and 16-bit multiply-add operations avx512_vp2intersect - Use AVX-512 Intersect instruction set avx512_vpopcntdq - Use AVX-512 Vector Population Count Doubleword and Quadword instruction set avx512dq - Use AVX-512 double- and quad-word instructions avx512f - Adds support for AVX-512 Foundation instructions avx512ifma - Use AVX-512 Integer Fused Multiply-Add instruction set avx512vl - Use AVX-512 vector-length instructions f16c - Adds support for F16C instruction set for converting between half-precision and single-precision floats fma3 - Use the Fused Multiply Add 3 instruction set ([fma] in cpuinfo) fma4 - Use the Fused Multiply Add 4 instruction set mmx - Use the MMX instruction set mmxext - Use the Extended MMX instruction set (a subset of SSE) ([mmxext] or [sse] in cpuinfo) padlock - Use VIA padlock instructions ([phe] in cpuinfo) pclmul - Use Carry-less Multiplication instructions ([pclmulqdq] in cpuinfo) popcnt - Enable popcnt instruction support ([abm] or [popcnt] in cpuinfo) rdrand - Use the RDRAND instruction for generating random numbers sha - Use the SHA-NI instruction set sse - Use the SSE instruction set sse2 - Use the SSE2 instruction set sse3 - Use the SSE3 instruction set ([pni] in cpuinfo, NOT ssse3) sse4_1 - Enable SSE4.1 instruction support sse4_2 - Enable SSE4.2 instruction support sse4a - Enable SSE4a instruction support ssse3 - Use the SSSE3 instruction set (NOT sse3/pni) vpclmulqdq - Use Vector Carry-Less Multiplication of Quadwords instruction set xop - Enable the XOP instruction set