kaguya
37 lines
669 B
C
37 lines
669 B
C
#include "libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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long double scalbnl(long double x, int n)
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{
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return scalbn(x, n);
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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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long double scalbnl(long double x, int n)
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{
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union ldshape u;
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if (n > 16383) {
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x *= 0x1p16383L;
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n -= 16383;
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if (n > 16383) {
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x *= 0x1p16383L;
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n -= 16383;
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if (n > 16383)
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n = 16383;
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}
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} else if (n < -16382) {
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x *= 0x1p-16382L * 0x1p113L;
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n += 16382 - 113;
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if (n < -16382) {
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x *= 0x1p-16382L * 0x1p113L;
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n += 16382 - 113;
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if (n < -16382)
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n = -16382;
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}
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}
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u.f = 1.0;
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u.i.se = 0x3fff + n;
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return x * u.f;
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}
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#endif
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