Function _mm_roundscale_round_sh

pub unsafe fn _mm_roundscale_round_sh(
    a: __m128h,
    b: __m128h,
    const IMM8: i32,
    const SAE: i32,
) -> __m128h

🔬This is a nightly-only experimental API. (stdarch_x86_avx512_f16 #127213)

Available on (x86 or x86-64) and target feature avx512fp16 and x86 only.

Round the lower half-precision (16-bit) floating-point element in b to the number of fraction bits specified by imm8, store the result in the lower element of dst, and copy the upper 7 packed elements from a to the upper elements of dst.

Rounding is done according to the imm8 parameter, which can be one of:

• _MM_FROUND_TO_NEAREST_INT : round to nearest
• _MM_FROUND_TO_NEG_INF : round down
• _MM_FROUND_TO_POS_INF : round up
• _MM_FROUND_TO_ZERO : truncate
• _MM_FROUND_CUR_DIRECTION : use MXCSR.RC - see _MM_SET_ROUNDING_MODE

Exceptions can be suppressed by passing _MM_FROUND_NO_EXC in the sae parameter

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