69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
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#include <ieee_float.h>
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#include <math.h>
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#include <stdlib.h>
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int ieee_float_cmp(const float a, const float b, const float maxDiff){
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float diff = a-b;
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if(fabsf(diff) <= maxDiff){
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return 0;
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}else{
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return (diff > maxDiff)?1:-1;
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}
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}
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int ieee_double_cmp(const double a, const double b, const double maxDiff){
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double diff = a-b;
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if(fabs(diff) <= maxDiff){
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return 0;
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}else{
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return (diff > maxDiff)?1:-1;
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}
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}
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int ieee_float_UlpsCmp(const float a, const float b, const float maxFloatDiff, const int maxUlpsDiff){
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const float absDiff = fabsf(a-b);
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if(absDiff <= maxFloatDiff){
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return 0;
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}
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ieee_float_t A;
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ieee_float_t B;
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A.value.f = a;
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B.value.f = b;
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if(A.value.IEEE754.sign != B.value.IEEE754.sign){
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return (int)(B.value.IEEE754.sign - A.value.IEEE754.sign);
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}
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const int ulpsDiff = abs((int)(A.value.uint - B.value.uint));
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if(ulpsDiff <= maxUlpsDiff){
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return 0;
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}
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return (ulpsDiff > maxUlpsDiff)?1:-1;
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}
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int ieee_double_UlpsCmp(const double a, const double b, const double maxFloatDiff, const int maxUlpsDiff){
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const double absDiff = fabs(a-b);
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if(absDiff <= maxFloatDiff){
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return 0;
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}
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ieee_double_t A = {.value.f = a};
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ieee_double_t B = {.value.f = b};
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if(A.value.IEEE754.sign != B.value.IEEE754.sign){
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return (int)(B.value.IEEE754.sign - A.value.IEEE754.sign);
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}
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const int ulpsDiff = abs((int)(A.value.uint - B.value.uint));
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if(ulpsDiff <= maxUlpsDiff){
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return 0;
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}
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return (ulpsDiff > maxUlpsDiff)?1:-1;
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}
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bool ieee_float_is_zero(const float a, const float maxDiff){
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return (fabsf(a) <= maxDiff)?true:false;
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}
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bool ieee_double_is_zero(const double a, const double maxDiff){
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return (fabs(a) <= maxDiff)?true:false;
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}
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