# Function core::arch::x86_64::_mm_sha1rnds4_epu32

1.27.0 · source ·

    pub unsafe fn _mm_sha1rnds4_epu32(
        a: __m128i,
        b: __m128i,
        const FUNC: i32
    ) -> __m128i

Available on (x86 or x86-64) and target feature `sha` and x86-64 only.
Expand description

Performs four rounds of SHA1 operation using an initial SHA1 state (A,B,C,D) from `a` and some pre-computed sum of the next 4 round message values (unsigned 32-bit integers), and state variable E from `b`, and return the updated SHA1 state (A,B,C,D). `FUNC` contains the logic functions and round constants.

Intel’s documentation