diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c b/sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c deleted file mode 100644 index 4088238f30..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c +++ /dev/null @@ -1,70 +0,0 @@ -/* s_ilogbl.c -- long double version of s_ilogb.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 - -/* ilogbl(long double x) - * return the binary exponent of non-zero x - * ilogbl(0) = FP_ILOGB0 - * ilogbl(NaN) = FP_ILOGBNAN (no signal is raised) - * ilogbl(+-Inf) = INT_MAX (no signal is raised) - */ - -#include <limits.h> -#include <math.h> -#include <math_private.h> -#include <math_ldbl_opt.h> - -int __ieee754_ilogbl(long double x) -{ - int64_t hx, hxs; - int ix; - double xhi, xlo; - - ldbl_unpack (x, &xhi, &xlo); - EXTRACT_WORDS64 (hx, xhi); - hxs = hx; - hx &= 0x7fffffffffffffffLL; - if(hx <= 0x0010000000000000LL) { - if(hx==0) - return FP_ILOGB0; /* ilogbl(0) = FP_ILOGB0 */ - else /* subnormal x */ - for (ix = -1022, hx<<=11; hx>0; hx<<=1) ix -=1; - return ix; - } - else if (hx < 0x7ff0000000000000LL) - { - int hexp = (hx >> 52) - 0x3ff; - /* If the high part is a power of 2, and the low part is - nonzero with the opposite sign, the low part affects - the exponent. */ - if ((hx & 0x000fffffffffffffLL) == 0) - { - int64_t lx; - EXTRACT_WORDS64 (lx, xlo); - if ((hxs ^ lx) < 0 && (lx & 0x7fffffffffffffffLL) != 0) - hexp--; - } - return hexp; - } - else if (FP_ILOGBNAN != INT_MAX) { - /* ISO C99 requires ilogbl(+-Inf) == INT_MAX. */ - if (hx==0x7ff0000000000000LL) - return INT_MAX; - } - return FP_ILOGBNAN; -} |