diff options
Diffstat (limited to '3rdparty/SDL2/src/libm/s_scalbn.c')
-rw-r--r-- | 3rdparty/SDL2/src/libm/s_scalbn.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/3rdparty/SDL2/src/libm/s_scalbn.c b/3rdparty/SDL2/src/libm/s_scalbn.c deleted file mode 100644 index f824e926d70..00000000000 --- a/3rdparty/SDL2/src/libm/s_scalbn.c +++ /dev/null @@ -1,79 +0,0 @@ -/* @(#)s_scalbn.c 5.1 93/09/24 */ -/* - * ==================================================== - * 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 const char rcsid[] = - "$NetBSD: s_scalbn.c,v 1.8 1995/05/10 20:48:08 jtc Exp $"; -#endif - -/* - * scalbn (double x, int n) - * scalbn(x,n) returns x* 2**n computed by exponent - * manipulation rather than by actually performing an - * exponentiation or a multiplication. - */ - -#include "math_libm.h" -#include "math_private.h" - -libm_hidden_proto(copysign) -#ifdef __STDC__ - static const double -#else - static double -#endif - two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ - twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ - huge_val = 1.0e+300, tiny = 1.0e-300; - -libm_hidden_proto(scalbn) -#ifdef __STDC__ - double scalbn(double x, int n) -#else - double scalbn(x, n) - double x; - int n; -#endif -{ - int32_t k, hx, lx; - EXTRACT_WORDS(hx, lx, x); - k = (hx & 0x7ff00000) >> 20; /* extract exponent */ - if (k == 0) { /* 0 or subnormal x */ - if ((lx | (hx & 0x7fffffff)) == 0) - return x; /* +-0 */ - x *= two54; - GET_HIGH_WORD(hx, x); - k = ((hx & 0x7ff00000) >> 20) - 54; - if (n < -50000) - return tiny * x; /* underflow */ - } - if (k == 0x7ff) - return x + x; /* NaN or Inf */ - k = k + n; - if (k > 0x7fe) - return huge_val * copysign(huge_val, x); /* overflow */ - if (k > 0) { /* normal result */ - SET_HIGH_WORD(x, (hx & 0x800fffff) | (k << 20)); - return x; - } - if (k <= -54) { - if (n > 50000) /* in case integer overflow in n+k */ - return huge_val * copysign(huge_val, x); /* overflow */ - else - return tiny * copysign(tiny, x); /* underflow */ - } - k += 54; /* subnormal result */ - SET_HIGH_WORD(x, (hx & 0x800fffff) | (k << 20)); - return x * twom54; -} - -libm_hidden_def(scalbn) |