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fixed bug in DeBinary

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Perry Kivolowitz 2022-06-16 10:09:02 -05:00
parent af92b0e1ea
commit 2ca082c99b
1 changed files with 11 additions and 8 deletions
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19
section_1/float/float_dump.cpp
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@ -12,6 +12,9 @@
using namespace std; using namespace std;
const int BIASD = 1023;
const int BIASF = 127;
const int FRAC_SIZD = 52; const int FRAC_SIZD = 52;
const int FRAC_SIZF = 23; const int FRAC_SIZF = 23;
@ -47,8 +50,8 @@ double DeBinary(bool is_double, unsigned long frac) {
int bits = (is_double ? FRAC_SIZD : FRAC_SIZF); int bits = (is_double ? FRAC_SIZD : FRAC_SIZF);
for (int i = 0; i < bits; i++) { for (int i = 0; i < bits; i++) {
if (frac & ((unsigned long)1 << (bits - 1 - i))) { if (frac & ((unsigned long)(1) << (bits - 1 - i))) {
f += 1.0f / double(1 << (i + 1)); f += 1.0f / double((unsigned long)(1) << (i + 1));
} }
} }
return f; return f;
@ -57,8 +60,8 @@ double DeBinary(bool is_double, unsigned long frac) {
template<class T> template<class T>
string MakeEquation(T & u, int bias) { string MakeEquation(T & u, int bias) {
stringstream ss; stringstream ss;
bool is_double = (bias == 1023); bool is_double = (bias == BIASD);
ss << (u.sign ? "-" : "") << 1.0 + DeBinary(is_double, u.frac) << " x 2^" << (u.expo - bias); ss << (u.sign ? "-" : "") << dec << setprecision(11) << 1.0 + DeBinary(is_double, u.frac) << " x 2^" << (u.expo - bias);
return ss.str(); return ss.str();
} }
@ -94,8 +97,8 @@ int main(int argc, char ** argv) {
cout << endl; cout << endl;
cout << setw(fore_space) << "De-biased (dec):"; cout << setw(fore_space) << "De-biased (dec):";
cout << setw(field_space) << dec << d.D.expo - 1023; cout << setw(field_space) << dec << d.D.expo - BIASD;
cout << setw(field_space) << dec << f.F.expo - 127; cout << setw(field_space) << dec << f.F.expo - BIASF;
cout << endl; cout << endl;
cout << setw(fore_space) << "Fraction (hex):"; cout << setw(fore_space) << "Fraction (hex):";
@ -134,8 +137,8 @@ int main(int argc, char ** argv) {
cout << endl; cout << endl;
cout << setw(fore_space) << "Equation:"; cout << setw(fore_space) << "Equation:";
cout << setw(field_space) << dec << MakeEquation<DP>(d.D, 1023); cout << setw(field_space) << dec << MakeEquation<DP>(d.D, BIASD);
cout << setw(field_space) << dec << MakeEquation<SP>(f.F, 127); cout << setw(field_space) << dec << MakeEquation<SP>(f.F, BIASF);
cout << endl; cout << endl;
return 0; return 0;