\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}\begin{array}{l}
\mathbf{if}\;b \le -4.829903230896134050158793286773621805382 \cdot 10^{148}:\\
\;\;\;\;1 \cdot \left(\frac{c}{b} - \frac{b}{a}\right)\\
\mathbf{elif}\;b \le 1.058331905530479345989188577279018272684 \cdot 10^{-144}:\\
\;\;\;\;\frac{\left(-b\right) + \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}{2 \cdot a}\\
\mathbf{elif}\;b \le 400482480739649191422756162656796672:\\
\;\;\;\;\frac{\frac{0 + 4 \cdot \left(a \cdot c\right)}{\left(-b\right) - \sqrt{b \cdot b - 4 \cdot \left(a \cdot c\right)}}}{2 \cdot a}\\
\mathbf{else}:\\
\;\;\;\;-1 \cdot \frac{c}{b}\\
\end{array}double f(double a, double b, double c) {
double r54935 = b;
double r54936 = -r54935;
double r54937 = r54935 * r54935;
double r54938 = 4.0;
double r54939 = a;
double r54940 = c;
double r54941 = r54939 * r54940;
double r54942 = r54938 * r54941;
double r54943 = r54937 - r54942;
double r54944 = sqrt(r54943);
double r54945 = r54936 + r54944;
double r54946 = 2.0;
double r54947 = r54946 * r54939;
double r54948 = r54945 / r54947;
return r54948;
}
double f(double a, double b, double c) {
double r54949 = b;
double r54950 = -4.829903230896134e+148;
bool r54951 = r54949 <= r54950;
double r54952 = 1.0;
double r54953 = c;
double r54954 = r54953 / r54949;
double r54955 = a;
double r54956 = r54949 / r54955;
double r54957 = r54954 - r54956;
double r54958 = r54952 * r54957;
double r54959 = 1.0583319055304793e-144;
bool r54960 = r54949 <= r54959;
double r54961 = -r54949;
double r54962 = r54949 * r54949;
double r54963 = 4.0;
double r54964 = r54955 * r54953;
double r54965 = r54963 * r54964;
double r54966 = r54962 - r54965;
double r54967 = sqrt(r54966);
double r54968 = r54961 + r54967;
double r54969 = 2.0;
double r54970 = r54969 * r54955;
double r54971 = r54968 / r54970;
double r54972 = 4.004824807396492e+35;
bool r54973 = r54949 <= r54972;
double r54974 = 0.0;
double r54975 = r54974 + r54965;
double r54976 = r54961 - r54967;
double r54977 = r54975 / r54976;
double r54978 = r54977 / r54970;
double r54979 = -1.0;
double r54980 = r54979 * r54954;
double r54981 = r54973 ? r54978 : r54980;
double r54982 = r54960 ? r54971 : r54981;
double r54983 = r54951 ? r54958 : r54982;
return r54983;
}




Bits error versus a




Bits error versus b




Bits error versus c
Results
| Original | 34.2 |
|---|---|
| Target | 20.9 |
| Herbie | 8.9 |
if b < -4.829903230896134e+148Initial program 61.7
Taylor expanded around -inf 2.8
Simplified2.8
if -4.829903230896134e+148 < b < 1.0583319055304793e-144Initial program 11.1
if 1.0583319055304793e-144 < b < 4.004824807396492e+35Initial program 35.7
rmApplied flip-+35.7
Simplified16.7
if 4.004824807396492e+35 < b Initial program 56.6
Taylor expanded around inf 4.3
Final simplification8.9
herbie shell --seed 2019294
(FPCore (a b c)
:name "quadp (p42, positive)"
:precision binary64
:herbie-target
(if (< b 0.0) (/ (+ (- b) (sqrt (- (* b b) (* 4 (* a c))))) (* 2 a)) (/ c (* a (/ (- (- b) (sqrt (- (* b b) (* 4 (* a c))))) (* 2 a)))))
(/ (+ (- b) (sqrt (- (* b b) (* 4 (* a c))))) (* 2 a)))