_mm256_mask_reduce_ph in core::arch::x86_64 - Rust
Description: Extract the reduced argument of packed half-precision (16-bit) floating-point elements in a by the number of bits specified by imm8, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

## _mm256_mask_reduce_ph

# Function _mm256_mask_reduce_ph

1.94.0 · Source

    pub fn _mm256_mask_reduce_ph(
        src: __m256h,
        k: __mmask16,
        a: __m256h,
        const IMM8: i32,
    ) -> __m256h

Available on x86-64 and target feature `avx512fp16` and target feature `avx512vl` only.
Expand description

Extract the reduced argument of packed half-precision (16-bit) floating-point elements in a by the number of bits specified by imm8, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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`

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