# Function core::arch::x86_64::_mm_aeskeygenassist_si128
1.27.0[−][src]

    pub unsafe fn _mm_aeskeygenassist_si128(a: __m128i, imm8: i32) -> __m128i

This is supported on x86-64 and target feature `aes` only.

Assist in expanding the AES cipher key.

Assist in expanding the AES cipher key by computing steps towards generating a round key for encryption cipher using data from `a` and an 8-bit round constant `imm8`.

Intel’s documentation