update from main archive 960830 cvs/libc-960903 cvs/libc-960902 cvs/libc-960901 cvs/libc-960831

Fri Aug 30 19:55:27 1996  Ulrich Drepper  <drepper@cygnus.com>

	* libio/genops.c: Make _cleanup an alias of _IO_cleanup.
	Reported by Erik Troan.

Fri Aug 30 15:40:04 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Dist: Add sys/procfs.h and
 	sys/sysmacros.h.  Reported by Curtiss <1CMC3466@IBM.MTSAC.EDU>.

Fri Aug 30 13:53:32 1996  Andreas Jaeger  <aj@arthur.pfalz.de>

	* sysdeps/unix/mman/syscalls.list: `mmap' has 6 arguments, not 5.

Fri Aug 30 13:01:10 1996  NIIBE Yutaka  <gniibe@mri.co.jp>

	* sysdeps/i386/fpu/__math.h (tan): Pop 1.0 in ST to get
	real result.

Fri Aug 30 03:33:33 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-ieee754/s_cbrtl.c: New file.  `long double'
	implementation.

	* sysdeps/unix/sysv/linux/i386/Dist: Add clone.S.

1 files changed, 123 insertions, 0 deletions

diff --git a/sysdeps/libm-ieee754/s_cbrtl.c b/sysdeps/libm-ieee754/s_cbrtl.c
new file mode 100644
index 0000000000..03ebfe7eb8
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_cbrtl.c
@@ -0,0 +1,123 @@
+/* s_cbrtl.c -- long double version of s_cbrt.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * 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
+
+#include "math.h"
+#include "math_private.h"
+
+/* cbrtl(x)
+ * Return cube root of x
+ */
+#ifdef __STDC__
+static const u_int32_t
+#else
+static u_int32_t
+#endif
+	B1_EXP = 10921,		/* = Int(B1) */
+	B1_MANT = 0x7bc4b064,	/* = Int(1.0-0.03306235651)*2**31 */
+
+	B2_EXP = 10900,
+	B2_MANT = 0x7bc4b064;	/* = Int(1.0-0.03306235651)*2**31 */
+
+#ifdef __STDC__
+static const long double
+#else
+static long double
+#endif
+C =  5.42857142857142815906e-01L, /* 19/35 */
+D = -7.05306122448979611050e-01L, /* -864/1225 */
+E =  1.41428571428571436819e+00L, /* 99/70 */
+F =  1.60714285714285720630e+00L, /* 45/28 */
+G =  3.57142857142857150787e-01L; /* 5/14 */
+
+#ifdef __STDC__
+	long double __cbrtl(long double x)
+#else
+	long double __cbrtl(x)
+	long double x;
+#endif
+{
+	int32_t	hx;
+	long double r,s,t=0.0,w;
+	u_int32_t sign, se, x0, x1;
+
+	GET_LDOUBLE_WORDS(se,x0,x1,x);
+	sign=se&0x8000; 		/* sign= sign(x) */
+	se ^= sign;
+	if(se==0x7fff) return(x+x); /* cbrt(NaN,INF) is itself */
+	if((se|x0|x1)==0)
+	    return(x);		/* cbrt(0) is itself */
+
+	SET_LDOUBLE_EXP(x,se);	/* x <- |x| */
+
+/* XXX I don't know whether the numbers for correct are correct.  The
+   precalculation is extended from 20 bits to 32 bits.  This hopefully
+   gives us the needed bits to get us still along with one iteration
+   step.  */
+
+    /* rough cbrt to 5 bits */
+	if(se==0) 		/* subnormal number */
+	  {
+	    u_int64_t xxl;
+	    u_int32_t set,t0,t1;
+	    SET_LDOUBLE_EXP(t,0x4035);	/* set t= 2**54 */
+	    SET_LDOUBLE_MSW(t,0x80000000);
+	    t*=x;
+	    GET_LDOUBLE_WORDS(set,t0,t1,t);
+	    xxl = ((u_int64_t) set) << 32 | t0;
+	    xxl /= 3;
+	    xxl += B2_EXP << 16 | B2_MANT;
+	    t0 = xxl & 0xffffffffu;
+	    set = xxl >> 32;
+	    SET_LDOUBLE_WORDS(t,set,t0,t1);
+	  }
+	else
+	  {
+	    u_int64_t xxl = ((u_int64_t) se) << 32 | x0;
+	    xxl /= 3;
+	    xxl += B1_EXP << 16 | B1_MANT;
+	    SET_LDOUBLE_MSW(t,xxl&0xffffffffu);
+	    xxl >>= 32;
+	    SET_LDOUBLE_EXP(t,xxl);
+	  }
+
+
+    /* new cbrt to 23 bits, may be implemented in single precision */
+	r=t*t/x;
+	s=C+r*t;
+	t*=G+F/(s+E+D/s);
+
+    /* chopped to 32 bits and make it larger than cbrt(x) */
+	GET_LDOUBLE_WORDS(se,x0,x1,t);
+	SET_LDOUBLE_WORDS(t,se,x0+1,0);
+
+
+    /* one step newton iteration to 53 bits with error less than 0.667 ulps */
+	s=t*t;		/* t*t is exact */
+	r=x/s;
+	w=t+t;
+	r=(r-t)/(w+r);	/* r-s is exact */
+	t=t+t*r;
+
+    /* retore the sign bit */
+	GET_LDOUBLE_EXP(se,t);
+	SET_LDOUBLE_EXP(t,se|sign);
+	return(t);
+}
+weak_alias (__cbrtl, cbrtl)