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

     1  #include <math.h>
     2  
     3  #if (__ARM_PCS_VFP || (__VFP_FP__ && !__SOFTFP__)) && !BROKEN_VFP_ASM
     4  
     5  float sqrtf(float x)
     6  {
     7  	__asm__ ("vsqrt.f32 %0, %1" : "=t"(x) : "t"(x));
     8  	return x;
     9  }
    10  
    11  #else
    12  
    13  #include "../sqrtf.c"
    14  
    15  #endif