88 lines
1.8 KiB
C++
88 lines
1.8 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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integer ieeeck_(integer *ispec, real *zero, real *one)
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{
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integer ret_val;
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real nan1, nan2, nan3, nan4, nan5, nan6, neginf, posinf, negzro, newzro;
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ret_val = 1;
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posinf = *one / *zero;
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if (posinf <= *one) {
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ret_val = 0;
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return ret_val;
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}
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neginf = -(*one) / *zero;
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if (neginf >= *zero) {
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ret_val = 0;
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return ret_val;
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}
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negzro = *one / (neginf + *one);
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if (negzro != *zero) {
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ret_val = 0;
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return ret_val;
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}
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neginf = *one / negzro;
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if (neginf >= *zero) {
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ret_val = 0;
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return ret_val;
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}
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newzro = negzro + *zero;
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if (newzro != *zero) {
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ret_val = 0;
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return ret_val;
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}
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posinf = *one / newzro;
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if (posinf <= *one) {
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ret_val = 0;
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return ret_val;
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}
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neginf *= posinf;
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if (neginf >= *zero) {
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ret_val = 0;
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return ret_val;
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}
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posinf *= posinf;
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if (posinf <= *one) {
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ret_val = 0;
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return ret_val;
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}
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if (*ispec == 0) {
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return ret_val;
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}
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nan1 = posinf + neginf;
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nan2 = posinf / neginf;
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nan3 = posinf / posinf;
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nan4 = posinf * *zero;
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nan5 = neginf * negzro;
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nan6 = nan5 * *zero;
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if (nan1 == nan1) {
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ret_val = 0;
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return ret_val;
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}
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if (nan2 == nan2) {
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ret_val = 0;
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return ret_val;
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}
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if (nan3 == nan3) {
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ret_val = 0;
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return ret_val;
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}
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if (nan4 == nan4) {
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ret_val = 0;
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return ret_val;
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}
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if (nan5 == nan5) {
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ret_val = 0;
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return ret_val;
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}
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if (nan6 == nan6) {
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ret_val = 0;
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return ret_val;
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}
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return ret_val;
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}
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#ifdef __cplusplus
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}
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#endif
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