$$% Arcus cosine. \def\acos{\cos^{-1}} % Vector projection. \def\projection#1#2{{proj_{#1}\left(#2\right)}} % Vector rejection. \def\rejection#1#2{{rej_{#1}\left(#2\right)}} % Norm. \def\norm#1{{\left\|#1\right\|}} % Cross product. \def\cross#1#2{\mathit{cross}\left(#1,#2\right)} % Dot product. \def\dot#1#2{{#1 \cdot #2}} % Magnitude. \def\mag#1{{\left|#1\right}} \def\group#1{\left(#1\right)}} \def\sbgrp#1{\left\{#1\right\}}$$

Ring1_Intrinsic_Fp_MantissaBits

 #define Ring1_Intrinsic_Fp_MantissaBits_suffix /* Implementation */ 

where suffix is either f32 (for the type float) or f64 (for the type double).

Symbolic constant evaluating to a positive integer value denoting the number of mantissa bits of an IEEE754 floating-point value. That value is 34 for f32 and is 52 for f64.