# Function core::arch::x86_64::_mm_dp_ps

1.27.0 · source · [−]

    pub unsafe fn _mm_dp_ps(a: __m128, b: __m128, const IMM8: i32) -> __m128

Available on (x86 or x86-64) and target feature `sse4.1` and x86-64 only.
Expand description

Returns the dot product of two __m128 vectors.

`IMM8[3:0]` is the broadcast mask, and `IMM8[7:4]` is the condition mask. If a condition mask bit is zero, the corresponding multiplication is replaced by a value of `0.0`. If a broadcast mask bit is one, the result of the dot product will be stored in the return value component. Otherwise if the broadcast mask bit is zero then the return component will be zero.

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