2.5-18.1

1 files changed, 119 insertions, 0 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
new file mode 100644
index 0000000000..39d0e6a5e3
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c
@@ -0,0 +1,119 @@
+/* s_nextafterl.c -- long double version of s_nextafter.c.
+ * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/* IEEE functions
+ *	nextafterl(x,y)
+ *	return the next machine floating-point number of x in the
+ *	direction toward y.
+ *   Special cases:
+ */
+
+#include <math.h>
+#include <math_private.h>
+#include <math_ldbl_opt.h>
+
+#ifdef __STDC__
+	long double __nextafterl(long double x, long double y)
+#else
+	long double __nextafterl(x,y)
+	long double x,y;
+#endif
+{
+	int64_t hx,hy,ihx,ihy,ilx;
+	u_int64_t lx,ly;
+
+	GET_LDOUBLE_WORDS64(hx,lx,x);
+	GET_LDOUBLE_WORDS64(hy,ly,y);
+	ihx = hx&0x7fffffffffffffffLL;		/* |hx| */
+	ilx = lx&0x7fffffffffffffffLL;		/* |lx| */
+	ihy = hy&0x7fffffffffffffffLL;		/* |hy| */
+
+	if((((ihx&0x7ff0000000000000LL)==0x7ff0000000000000LL)&&
+	    ((ihx&0x000fffffffffffffLL)!=0)) ||   /* x is nan */
+	   (((ihy&0x7ff0000000000000LL)==0x7ff0000000000000LL)&&
+	    ((ihy&0x000fffffffffffffLL)!=0)))     /* y is nan */
+	    return x+y; /* signal the nan */
+	if(x==y)
+	    return y;		/* x=y, return y */
+	if(ihx == 0 && ilx == 0) {			/* x == 0 */
+	    long double u;
+	    hy = (hy & 0x8000000000000000ULL) | 1;
+	    SET_LDOUBLE_WORDS64(x,hy,0ULL);/* return +-minsubnormal */
+	    u = math_opt_barrier (x);
+	    u = u * u;
+	    math_force_eval (u);		/* raise underflow flag */
+	    return x;
+	}
+	
+	long double u;
+	if(x > y) {	/* x > y, x -= ulp */
+	    if((hx==0xffefffffffffffffLL)&&(lx==0xfc8ffffffffffffeLL))
+	      return x+x;	/* overflow, return -inf */
+	    if (hx >= 0x7ff0000000000000LL) {
+	      SET_LDOUBLE_WORDS64(u,0x7fefffffffffffffLL,0x7c8ffffffffffffeLL);
+	      return u;
+	    }
+	    if(ihx <= 0x0360000000000000LL) {  /* x <= LDBL_MIN */
+	      u = math_opt_barrier (x);
+	      x -= __LDBL_DENORM_MIN__;
+	      if (ihx < 0x0360000000000000LL
+		  || (hx > 0 && (int64_t) lx <= 0)
+		  || (hx < 0 && (int64_t) lx > 1)) {
+		u = u * u;
+		math_force_eval (u);		/* raise underflow flag */
+	      }
+	      return x;
+	    }
+	    if (ihx < 0x06a0000000000000LL) { /* ulp will denormal */
+	      SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL),0ULL);
+	      u *= 0x1.0000000000000p-105L;
+	    } else
+	      SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL)-0x0690000000000000LL,0ULL);
+	    return x - u;
+	} else {				/* x < y, x += ulp */
+	    if((hx==0x7fefffffffffffffLL)&&(lx==0x7c8ffffffffffffeLL))
+	      return x+x;	/* overflow, return +inf */
+	    if ((u_int64_t) hx >= 0xfff0000000000000ULL) {
+	      SET_LDOUBLE_WORDS64(u,0xffefffffffffffffLL,0xfc8ffffffffffffeLL);
+	      return u;
+	    }
+	    if(ihx <= 0x0360000000000000LL) {  /* x <= LDBL_MIN */
+	      u = math_opt_barrier (x);
+	      x += __LDBL_DENORM_MIN__;
+	      if (ihx < 0x0360000000000000LL
+		  || (hx > 0 && (int64_t) lx < 0 && lx != 0x8000000000000001LL)
+		  || (hx < 0 && (int64_t) lx >= 0)) {
+		u = u * u;
+		math_force_eval (u);		/* raise underflow flag */
+	      }
+	      if (x == 0.0L)	/* handle negative __LDBL_DENORM_MIN__ case */
+		x = -0.0L;
+	      return x;
+	    }
+	    if (ihx < 0x06a0000000000000LL) { /* ulp will denormal */
+	      SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL),0ULL);
+	      u *= 0x1.0000000000000p-105L;
+	    } else
+	      SET_LDOUBLE_WORDS64(u,(hx&0x7ff0000000000000LL)-0x0690000000000000LL,0ULL);
+	    return x + u;
+	}
+}
+strong_alias (__nextafterl, __nexttowardl)
+long_double_symbol (libm, __nextafterl, nextafterl);
+long_double_symbol (libm, __nexttowardl, nexttowardl);