207390f763
2001-06-11 Michael Deutschmann <michael@talamasca.ocis.net> * rt/tst-aio4.c (do_test): Test whether rt signals are supported. Use my_signo instead of MY_SIGNO and initialize it so that the used signal is always available. 2001-06-11 Andreas Jaeger <aj@suse.de>, Michael Deutschmann <michael@talamasca.ocis.net> * io/test-lfs.c (do_prepare): Clean up error messages. (test_ftello): Check for EFBIG and ENOSP, clean up error messages. (do_test): Likewise. 2001-06-11 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/powerpc/bits/termios.h (IXANY, IUCLC, IMAXBEL): Make always visible since they're needed by POSIX. Closes PR libc/2320, reported by Chris Yeoh <cyeoh@samba.org>. 2001-06-10 Ben Collins <bcollins@debian.org> * sysdeps/arm/elf/start.S: Use #function, not @function, for .type of _start. * sysdeps/ieee754/ldbl-128/s_ilogbl.c: Include limits.h to get INT_MAX. 2001-06-07 H.J. Lu <hjl@gnu.org> * sunrpc/rpc/rpc.h: Add __BEGIN_DECLS/__END_DECLS.
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* s_ilogbl.c -- long double version of s_ilogb.c.
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* Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/* ilogbl(long double x)
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* return the binary exponent of non-zero x
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* ilogbl(0) = FP_ILOGB0
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* ilogbl(NaN) = FP_ILOGBNAN (no signal is raised)
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* ilogbl(+-Inf) = INT_MAX (no signal is raised)
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*/
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#include <limits.h>
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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int __ilogbl(long double x)
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#else
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int __ilogbl(x)
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long double x;
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#endif
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{
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int64_t hx,lx;
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int ix;
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GET_LDOUBLE_WORDS64(hx,lx,x);
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hx &= 0x7fffffffffffffffLL;
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if(hx <= 0x0001000000000000LL) {
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if((hx|lx)==0)
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return FP_ILOGB0; /* ilogbl(0) = FP_ILOGB0 */
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else /* subnormal x */
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if(hx==0) {
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for (ix = -16431; lx>0; lx<<=1) ix -=1;
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} else {
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for (ix = -16382, hx<<=15; hx>0; hx<<=1) ix -=1;
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}
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return ix;
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}
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else if (hx<0x7fff000000000000LL) return (hx>>48)-0x3fff;
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else if (FP_ILOGBNAN != INT_MAX) {
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/* ISO C99 requires ilogbl(+-Inf) == INT_MAX. */
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if (((hx^0x7fff000000000000LL)|lx) == 0)
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return INT_MAX;
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}
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return FP_ILOGBNAN;
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}
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weak_alias (__ilogbl, ilogbl)
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