github.com/afumu/libc@v0.0.6/musl/src/math/x32/fma.c (about)

     1  #include <math.h>
     2  
     3  #if __FMA__
     4  
     5  double fma(double x, double y, double z)
     6  {
     7  	__asm__ ("vfmadd132sd %1, %2, %0" : "+x" (x) : "x" (y), "x" (z));
     8  	return x;
     9  }
    10  
    11  #elif __FMA4__
    12  
    13  double fma(double x, double y, double z)
    14  {
    15  	__asm__ ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
    16  	return x;
    17  }
    18  
    19  #else
    20  
    21  #include "../fma.c"
    22  
    23  #endif