kaguya
30 lines
531 B
C
30 lines
531 B
C
#include "libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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long double rintl(long double x)
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{
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return rint(x);
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}
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#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
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static const long double toint = 1/LDBL_EPSILON;
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long double rintl(long double x)
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{
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union ldshape u = {x};
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int e = u.i.se & 0x7fff;
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int s = u.i.se >> 15;
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long double y;
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if (e >= 0x3fff+LDBL_MANT_DIG-1)
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return x;
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if (s)
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y = x - toint + toint;
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else
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y = x + toint - toint;
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if (y == 0)
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return 0*x;
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return y;
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}
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#endif
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