diff options
Diffstat (limited to 'Source/3rdParty/SDL2/src/libm/s_scalbn.c')
-rw-r--r-- | Source/3rdParty/SDL2/src/libm/s_scalbn.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/Source/3rdParty/SDL2/src/libm/s_scalbn.c b/Source/3rdParty/SDL2/src/libm/s_scalbn.c deleted file mode 100644 index 6bb7192..0000000 --- a/Source/3rdParty/SDL2/src/libm/s_scalbn.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * ==================================================== - * 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. - * ==================================================== - */ - -/* - * scalbln(double x, long n) - * scalbln(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" -#include <limits.h> - -static const double -two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ -twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ -huge = 1.0e+300, -tiny = 1.0e-300; - -double scalbln(double x, long n) -{ - 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 (k == 0x7ff) - return x + x; /* NaN or Inf */ - k = k + n; - if (k > 0x7fe) - return huge * copysign(huge, x); /* overflow */ - if (n < -50000) - return tiny * copysign(tiny, x); /* underflow */ - 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 * copysign(huge, x); /* overflow */ - return tiny * copysign(tiny, x); /* underflow */ - } - k += 54; /* subnormal result */ - SET_HIGH_WORD(x, (hx & 0x800fffff) | (k << 20)); - return x * twom54; -} -libm_hidden_def(scalbln) - - -double scalbn(double x, int n) -{ - return scalbln(x, n); -} -libm_hidden_def(scalbn) |