_chgsignf.c

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#include "libm.h"
#include "libm_util.h"
 
float FN_PROTOTYPE(_chgsignf)(float x)
{
  /* Returns x with its sign reversed.
     NaNs are not considered special; their sign bits are handled
     the same as for any other number */
  unsigned int u;
  GET_BITS_SP32(x, u);
  u ^= SIGNBIT_SP32;
  PUT_BITS_SP32(u, x);
  return x;
}