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author | PikalaxALT <pikalaxalt@gmail.com> | 2018-01-03 17:39:24 -0700 |
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committer | PikalaxALT <pikalaxalt@gmail.com> | 2018-01-03 17:39:24 -0700 |
commit | a6c1ed4716cf02626ea035beb6dd4a921642ba80 (patch) | |
tree | ef582c1b52819e27bdd16097ec03b69799d04ede /newlib/libm/math/s_frexp.c | |
parent | f6c9a624fa8a6878a7fb2b02f55e4990a20feb59 (diff) |
Use libc from agbcc instead of standalone newlib\nYou must have AGBCC commit 80d029caec189587f8b9294b6c8a5a489b8f5f88 in order to compile pmd_red.gbalibc
Diffstat (limited to 'newlib/libm/math/s_frexp.c')
-rw-r--r-- | newlib/libm/math/s_frexp.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/newlib/libm/math/s_frexp.c b/newlib/libm/math/s_frexp.c deleted file mode 100644 index aaa3606..0000000 --- a/newlib/libm/math/s_frexp.c +++ /dev/null @@ -1,114 +0,0 @@ - -/* @(#)s_frexp.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. - * ==================================================== - */ - -/* -FUNCTION - <<frexp>>, <<frexpf>>---split floating-point number -INDEX - frexp -INDEX - frexpf - -ANSI_SYNOPSIS - #include <math.h> - double frexp(double <[val]>, int *<[exp]>); - float frexpf(float <[val]>, int *<[exp]>); - -TRAD_SYNOPSIS - #include <math.h> - double frexp(<[val]>, <[exp]>) - double <[val]>; - int *<[exp]>; - - float frexpf(<[val]>, <[exp]>) - float <[val]>; - int *<[exp]>; - - -DESCRIPTION - All non zero, normal numbers can be described as <[m]> * 2**<[p]>. - <<frexp>> represents the double <[val]> as a mantissa <[m]> - and a power of two <[p]>. The resulting mantissa will always - be greater than or equal to <<0.5>>, and less than <<1.0>> (as - long as <[val]> is nonzero). The power of two will be stored - in <<*>><[exp]>. - -@ifinfo -<[m]> and <[p]> are calculated so that -<[val]> is <[m]> times <<2>> to the power <[p]>. -@end ifinfo -@tex -<[m]> and <[p]> are calculated so that -$ val = m \times 2^p $. -@end tex - -<<frexpf>> is identical, other than taking and returning -floats rather than doubles. - -RETURNS -<<frexp>> returns the mantissa <[m]>. If <[val]> is <<0>>, infinity, -or Nan, <<frexp>> will set <<*>><[exp]> to <<0>> and return <[val]>. - -PORTABILITY -<<frexp>> is ANSI. -<<frexpf>> is an extension. - - -*/ - -/* - * for non-zero x - * x = frexp(arg,&exp); - * return a double fp quantity x such that 0.5 <= |x| <1.0 - * and the corresponding binary exponent "exp". That is - * arg = x*2^exp. - * If arg is inf, 0.0, or NaN, then frexp(arg,&exp) returns arg - * with *exp=0. - */ - -#include "fdlibm.h" - -#ifndef _DOUBLE_IS_32BITS - -#ifdef __STDC__ -static const double -#else -static double -#endif -two54 = 1.80143985094819840000e+16; /* 0x43500000, 0x00000000 */ - -#ifdef __STDC__ - double frexp(double x, int *eptr) -#else - double frexp(x, eptr) - double x; int *eptr; -#endif -{ - __int32_t hx, ix, lx; - EXTRACT_WORDS(hx,lx,x); - ix = 0x7fffffff&hx; - *eptr = 0; - if(ix>=0x7ff00000||((ix|lx)==0)) return x; /* 0,inf,nan */ - if (ix<0x00100000) { /* subnormal */ - x *= two54; - GET_HIGH_WORD(hx,x); - ix = hx&0x7fffffff; - *eptr = -54; - } - *eptr += (ix>>20)-1022; - hx = (hx&0x800fffff)|0x3fe00000; - SET_HIGH_WORD(x,hx); - return x; -} - -#endif /* _DOUBLE_IS_32BITS */ |