github.com/afumu/libc@v0.0.6/musl/src/math/arm/fma.c (about)

     1  #include <math.h>
     2  
     3  #if __ARM_FEATURE_FMA && __ARM_FP&8 && !__SOFTFP__
     4  
     5  double fma(double x, double y, double z)
     6  {
     7  	__asm__ ("vfma.f64 %P0, %P1, %P2" : "+w"(z) : "w"(x), "w"(y));
     8  	return z;
     9  }
    10  
    11  #else
    12  
    13  #include "../fma.c"
    14  
    15  #endif