fnmadd Class — pytorch Architecture

Architecture documentation for the fnmadd class in vec128_half_neon.h from the pytorch codebase.

Class c

Entity Profile

Source Code

aten/src/ATen/cpu/vec/vec128/vec128_half_neon.h lines 584–594

template <>
Vectorized<c10::Half> inline fnmadd(
    const Vectorized<c10::Half>& a,
    const Vectorized<c10::Half>& b,
    const Vectorized<c10::Half>& c) {
#ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
  return Vectorized<c10::Half>(vfmsq_f16(c, a, b));
#else
  return -a * b + c;
#endif
}

Source

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