32 lines
459 B
C++
32 lines
459 B
C++
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#include "lmp_f2c.h"
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extern "C" {
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double pow_lmp_di(doublereal *ap, integer *bp)
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{
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double pow, x;
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integer n;
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unsigned long u;
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pow = 1;
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x = *ap;
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n = *bp;
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if (n != 0) {
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if (n < 0) {
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n = -n;
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x = 1 / x;
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}
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for (u = n;;) {
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if (u & 01) pow *= x;
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if (u >>= 1)
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x *= x;
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else
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break;
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}
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}
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return (pow);
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}
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}
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