fmuladdf64 in std::intrinsics - Rust (original) (raw)

Function fmuladdf64

Source

pub unsafe fn fmuladdf64(a: f64, b: f64, c: f64) -> f64

🔬This is a nightly-only experimental API. (core_intrinsics)

Expand description

Returns a * b + c for f64 values, non-deterministically executing either a fused multiply-add or two operations with rounding of the intermediate result.

The operation is fused if the code generator determines that target instruction set has support for a fused operation, and that the fused operation is more efficient than the equivalent, separate pair of mul and add instructions. It is unspecified whether or not a fused operation is selected, and that may depend on optimization level and context, for example.