kc3-lang/libquadmath/math/isinfq.c

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• Hash : 4f659ab9
  Author : Thomas de Grivel
  Date : 2025-11-02T19:33:45
  

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• math/isinfq.c

• /*
   * Written by J.T. Conklin <jtc@netbsd.org>.
   * Change for long double by Jakub Jelinek <jj@ultra.linux.cz>
   * Public domain.
   */
  
  #if defined(LIBM_SCCS) && !defined(lint)
  static char rcsid[] = "$NetBSD: $";
  #endif
  
  /*
   * isinfq(x) returns 1 if x is inf, -1 if x is -inf, else 0;
   * no branching!
   */
  
  #include "quadmath-imp.h"
  
  int
  isinfq (__float128 x)
  {
  	int64_t hx,lx;
  	GET_FLT128_WORDS64(hx,lx,x);
  	lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
  	lx |= -lx;
  	return ~(lx >> 63) & (hx >> 62);
  }
  

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