Function vfmsq_f16 

pub fn vfmsq_f16(a: float16x8_t, b: float16x8_t, c: float16x8_t) -> float16x8_t

Available on (AArch64 or ARM64EC) and non-ARM64EC and target feature neon and target feature fp16 only.

Floating-point fused multiply-subtract from accumulator Arm’s documentation