
(FPCore (x y z t) :precision binary64 (+ x (* (- y x) (/ z t))))
double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x + ((y - x) * (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
def code(x, y, z, t): return x + ((y - x) * (z / t))
function code(x, y, z, t) return Float64(x + Float64(Float64(y - x) * Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x + ((y - x) * (z / t)); end
code[x_, y_, z_, t_] := N[(x + N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(y - x\right) \cdot \frac{z}{t}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 8 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t) :precision binary64 (+ x (* (- y x) (/ z t))))
double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x + ((y - x) * (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
def code(x, y, z, t): return x + ((y - x) * (z / t))
function code(x, y, z, t) return Float64(x + Float64(Float64(y - x) * Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x + ((y - x) * (z / t)); end
code[x_, y_, z_, t_] := N[(x + N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(y - x\right) \cdot \frac{z}{t}
\end{array}
(FPCore (x y z t) :precision binary64 (fma (- y x) (/ z t) x))
double code(double x, double y, double z, double t) {
return fma((y - x), (z / t), x);
}
function code(x, y, z, t) return fma(Float64(y - x), Float64(z / t), x) end
code[x_, y_, z_, t_] := N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y - x, \frac{z}{t}, x\right)
\end{array}
Initial program 97.2%
+-commutative97.2%
fma-def97.2%
Simplified97.2%
Final simplification97.2%
(FPCore (x y z t) :precision binary64 (if (or (<= (/ z t) -40000000.0) (not (<= (/ z t) 5e-70))) (* (- y x) (/ z t)) x))
double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 5e-70)) {
tmp = (y - x) * (z / t);
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if (((z / t) <= (-40000000.0d0)) .or. (.not. ((z / t) <= 5d-70))) then
tmp = (y - x) * (z / t)
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 5e-70)) {
tmp = (y - x) * (z / t);
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if ((z / t) <= -40000000.0) or not ((z / t) <= 5e-70): tmp = (y - x) * (z / t) else: tmp = x return tmp
function code(x, y, z, t) tmp = 0.0 if ((Float64(z / t) <= -40000000.0) || !(Float64(z / t) <= 5e-70)) tmp = Float64(Float64(y - x) * Float64(z / t)); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (((z / t) <= -40000000.0) || ~(((z / t) <= 5e-70))) tmp = (y - x) * (z / t); else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[N[(z / t), $MachinePrecision], -40000000.0], N[Not[LessEqual[N[(z / t), $MachinePrecision], 5e-70]], $MachinePrecision]], N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;\frac{z}{t} \leq -40000000 \lor \neg \left(\frac{z}{t} \leq 5 \cdot 10^{-70}\right):\\
\;\;\;\;\left(y - x\right) \cdot \frac{z}{t}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if (/.f64 z t) < -4e7 or 4.9999999999999998e-70 < (/.f64 z t) Initial program 95.8%
+-commutative95.8%
fma-def95.8%
Simplified95.8%
Taylor expanded in z around inf 85.2%
Taylor expanded in y around 0 83.9%
+-commutative83.9%
*-commutative83.9%
associate-*r/83.2%
*-commutative83.2%
associate-*r/83.2%
mul-1-neg83.2%
distribute-rgt-neg-out83.2%
associate-*r/81.5%
distribute-lft-out85.2%
distribute-frac-neg85.2%
sub-neg85.2%
div-sub88.2%
associate-*r/89.8%
associate-*l/90.8%
*-commutative90.8%
Simplified90.8%
if -4e7 < (/.f64 z t) < 4.9999999999999998e-70Initial program 98.8%
+-commutative98.8%
fma-def98.8%
Simplified98.8%
Taylor expanded in z around 0 78.0%
Final simplification84.8%
(FPCore (x y z t) :precision binary64 (if (or (<= (/ z t) -40000000.0) (not (<= (/ z t) 1e-6))) (* (- y x) (/ z t)) (+ x (* z (/ y t)))))
double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 1e-6)) {
tmp = (y - x) * (z / t);
} else {
tmp = x + (z * (y / t));
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if (((z / t) <= (-40000000.0d0)) .or. (.not. ((z / t) <= 1d-6))) then
tmp = (y - x) * (z / t)
else
tmp = x + (z * (y / t))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 1e-6)) {
tmp = (y - x) * (z / t);
} else {
tmp = x + (z * (y / t));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if ((z / t) <= -40000000.0) or not ((z / t) <= 1e-6): tmp = (y - x) * (z / t) else: tmp = x + (z * (y / t)) return tmp
function code(x, y, z, t) tmp = 0.0 if ((Float64(z / t) <= -40000000.0) || !(Float64(z / t) <= 1e-6)) tmp = Float64(Float64(y - x) * Float64(z / t)); else tmp = Float64(x + Float64(z * Float64(y / t))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (((z / t) <= -40000000.0) || ~(((z / t) <= 1e-6))) tmp = (y - x) * (z / t); else tmp = x + (z * (y / t)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[N[(z / t), $MachinePrecision], -40000000.0], N[Not[LessEqual[N[(z / t), $MachinePrecision], 1e-6]], $MachinePrecision]], N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision], N[(x + N[(z * N[(y / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;\frac{z}{t} \leq -40000000 \lor \neg \left(\frac{z}{t} \leq 10^{-6}\right):\\
\;\;\;\;\left(y - x\right) \cdot \frac{z}{t}\\
\mathbf{else}:\\
\;\;\;\;x + z \cdot \frac{y}{t}\\
\end{array}
\end{array}
if (/.f64 z t) < -4e7 or 9.99999999999999955e-7 < (/.f64 z t) Initial program 95.4%
+-commutative95.4%
fma-def95.4%
Simplified95.4%
Taylor expanded in z around inf 88.6%
Taylor expanded in y around 0 86.7%
+-commutative86.7%
*-commutative86.7%
associate-*r/86.4%
*-commutative86.4%
associate-*r/86.4%
mul-1-neg86.4%
distribute-rgt-neg-out86.4%
associate-*r/84.6%
distribute-lft-out88.6%
distribute-frac-neg88.6%
sub-neg88.6%
div-sub91.9%
associate-*r/93.1%
associate-*l/94.0%
*-commutative94.0%
Simplified94.0%
if -4e7 < (/.f64 z t) < 9.99999999999999955e-7Initial program 98.9%
Taylor expanded in y around inf 95.6%
associate-*l/90.3%
Simplified90.3%
Final simplification92.1%
(FPCore (x y z t) :precision binary64 (if (or (<= (/ z t) -40000000.0) (not (<= (/ z t) 1e-6))) (* (- y x) (/ z t)) (+ x (* y (/ z t)))))
double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 1e-6)) {
tmp = (y - x) * (z / t);
} else {
tmp = x + (y * (z / t));
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if (((z / t) <= (-40000000.0d0)) .or. (.not. ((z / t) <= 1d-6))) then
tmp = (y - x) * (z / t)
else
tmp = x + (y * (z / t))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -40000000.0) || !((z / t) <= 1e-6)) {
tmp = (y - x) * (z / t);
} else {
tmp = x + (y * (z / t));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if ((z / t) <= -40000000.0) or not ((z / t) <= 1e-6): tmp = (y - x) * (z / t) else: tmp = x + (y * (z / t)) return tmp
function code(x, y, z, t) tmp = 0.0 if ((Float64(z / t) <= -40000000.0) || !(Float64(z / t) <= 1e-6)) tmp = Float64(Float64(y - x) * Float64(z / t)); else tmp = Float64(x + Float64(y * Float64(z / t))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (((z / t) <= -40000000.0) || ~(((z / t) <= 1e-6))) tmp = (y - x) * (z / t); else tmp = x + (y * (z / t)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[N[(z / t), $MachinePrecision], -40000000.0], N[Not[LessEqual[N[(z / t), $MachinePrecision], 1e-6]], $MachinePrecision]], N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision], N[(x + N[(y * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;\frac{z}{t} \leq -40000000 \lor \neg \left(\frac{z}{t} \leq 10^{-6}\right):\\
\;\;\;\;\left(y - x\right) \cdot \frac{z}{t}\\
\mathbf{else}:\\
\;\;\;\;x + y \cdot \frac{z}{t}\\
\end{array}
\end{array}
if (/.f64 z t) < -4e7 or 9.99999999999999955e-7 < (/.f64 z t) Initial program 95.4%
+-commutative95.4%
fma-def95.4%
Simplified95.4%
Taylor expanded in z around inf 88.6%
Taylor expanded in y around 0 86.7%
+-commutative86.7%
*-commutative86.7%
associate-*r/86.4%
*-commutative86.4%
associate-*r/86.4%
mul-1-neg86.4%
distribute-rgt-neg-out86.4%
associate-*r/84.6%
distribute-lft-out88.6%
distribute-frac-neg88.6%
sub-neg88.6%
div-sub91.9%
associate-*r/93.1%
associate-*l/94.0%
*-commutative94.0%
Simplified94.0%
if -4e7 < (/.f64 z t) < 9.99999999999999955e-7Initial program 98.9%
Taylor expanded in y around inf 95.6%
associate-*r/98.0%
*-commutative98.0%
Applied egg-rr98.0%
Final simplification96.0%
(FPCore (x y z t) :precision binary64 (if (or (<= (/ z t) -1e+19) (not (<= (/ z t) 2e-90))) (/ y (/ t z)) x))
double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -1e+19) || !((z / t) <= 2e-90)) {
tmp = y / (t / z);
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if (((z / t) <= (-1d+19)) .or. (.not. ((z / t) <= 2d-90))) then
tmp = y / (t / z)
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (((z / t) <= -1e+19) || !((z / t) <= 2e-90)) {
tmp = y / (t / z);
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if ((z / t) <= -1e+19) or not ((z / t) <= 2e-90): tmp = y / (t / z) else: tmp = x return tmp
function code(x, y, z, t) tmp = 0.0 if ((Float64(z / t) <= -1e+19) || !(Float64(z / t) <= 2e-90)) tmp = Float64(y / Float64(t / z)); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (((z / t) <= -1e+19) || ~(((z / t) <= 2e-90))) tmp = y / (t / z); else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[N[(z / t), $MachinePrecision], -1e+19], N[Not[LessEqual[N[(z / t), $MachinePrecision], 2e-90]], $MachinePrecision]], N[(y / N[(t / z), $MachinePrecision]), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;\frac{z}{t} \leq -1 \cdot 10^{+19} \lor \neg \left(\frac{z}{t} \leq 2 \cdot 10^{-90}\right):\\
\;\;\;\;\frac{y}{\frac{t}{z}}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if (/.f64 z t) < -1e19 or 1.99999999999999999e-90 < (/.f64 z t) Initial program 95.8%
+-commutative95.8%
fma-def95.8%
Simplified95.8%
Taylor expanded in z around inf 85.1%
Taylor expanded in y around inf 59.5%
associate-/l*64.0%
Simplified64.0%
if -1e19 < (/.f64 z t) < 1.99999999999999999e-90Initial program 98.7%
+-commutative98.7%
fma-def98.8%
Simplified98.8%
Taylor expanded in z around 0 77.3%
Final simplification70.2%
(FPCore (x y z t) :precision binary64 (if (<= t -1750000000000.0) x (if (<= t 1.05e-35) (* z (/ y t)) x)))
double code(double x, double y, double z, double t) {
double tmp;
if (t <= -1750000000000.0) {
tmp = x;
} else if (t <= 1.05e-35) {
tmp = z * (y / t);
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: tmp
if (t <= (-1750000000000.0d0)) then
tmp = x
else if (t <= 1.05d-35) then
tmp = z * (y / t)
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (t <= -1750000000000.0) {
tmp = x;
} else if (t <= 1.05e-35) {
tmp = z * (y / t);
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if t <= -1750000000000.0: tmp = x elif t <= 1.05e-35: tmp = z * (y / t) else: tmp = x return tmp
function code(x, y, z, t) tmp = 0.0 if (t <= -1750000000000.0) tmp = x; elseif (t <= 1.05e-35) tmp = Float64(z * Float64(y / t)); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (t <= -1750000000000.0) tmp = x; elseif (t <= 1.05e-35) tmp = z * (y / t); else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[LessEqual[t, -1750000000000.0], x, If[LessEqual[t, 1.05e-35], N[(z * N[(y / t), $MachinePrecision]), $MachinePrecision], x]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;t \leq -1750000000000:\\
\;\;\;\;x\\
\mathbf{elif}\;t \leq 1.05 \cdot 10^{-35}:\\
\;\;\;\;z \cdot \frac{y}{t}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if t < -1.75e12 or 1.05e-35 < t Initial program 98.8%
+-commutative98.8%
fma-def98.8%
Simplified98.8%
Taylor expanded in z around 0 65.8%
if -1.75e12 < t < 1.05e-35Initial program 95.7%
+-commutative95.7%
fma-def95.7%
Simplified95.7%
Taylor expanded in z around inf 70.8%
Taylor expanded in y around inf 53.7%
Final simplification59.6%
(FPCore (x y z t) :precision binary64 (+ x (* (- y x) (/ z t))))
double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x + ((y - x) * (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
def code(x, y, z, t): return x + ((y - x) * (z / t))
function code(x, y, z, t) return Float64(x + Float64(Float64(y - x) * Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x + ((y - x) * (z / t)); end
code[x_, y_, z_, t_] := N[(x + N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(y - x\right) \cdot \frac{z}{t}
\end{array}
Initial program 97.2%
Final simplification97.2%
(FPCore (x y z t) :precision binary64 x)
double code(double x, double y, double z, double t) {
return x;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x
end function
public static double code(double x, double y, double z, double t) {
return x;
}
def code(x, y, z, t): return x
function code(x, y, z, t) return x end
function tmp = code(x, y, z, t) tmp = x; end
code[x_, y_, z_, t_] := x
\begin{array}{l}
\\
x
\end{array}
Initial program 97.2%
+-commutative97.2%
fma-def97.2%
Simplified97.2%
Taylor expanded in z around 0 39.8%
Final simplification39.8%
(FPCore (x y z t)
:precision binary64
(let* ((t_1 (* (- y x) (/ z t))) (t_2 (+ x (/ (- y x) (/ t z)))))
(if (< t_1 -1013646692435.8867)
t_2
(if (< t_1 0.0) (+ x (/ (* (- y x) z) t)) t_2))))
double code(double x, double y, double z, double t) {
double t_1 = (y - x) * (z / t);
double t_2 = x + ((y - x) / (t / z));
double tmp;
if (t_1 < -1013646692435.8867) {
tmp = t_2;
} else if (t_1 < 0.0) {
tmp = x + (((y - x) * z) / t);
} else {
tmp = t_2;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: t_1
real(8) :: t_2
real(8) :: tmp
t_1 = (y - x) * (z / t)
t_2 = x + ((y - x) / (t / z))
if (t_1 < (-1013646692435.8867d0)) then
tmp = t_2
else if (t_1 < 0.0d0) then
tmp = x + (((y - x) * z) / t)
else
tmp = t_2
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double t_1 = (y - x) * (z / t);
double t_2 = x + ((y - x) / (t / z));
double tmp;
if (t_1 < -1013646692435.8867) {
tmp = t_2;
} else if (t_1 < 0.0) {
tmp = x + (((y - x) * z) / t);
} else {
tmp = t_2;
}
return tmp;
}
def code(x, y, z, t): t_1 = (y - x) * (z / t) t_2 = x + ((y - x) / (t / z)) tmp = 0 if t_1 < -1013646692435.8867: tmp = t_2 elif t_1 < 0.0: tmp = x + (((y - x) * z) / t) else: tmp = t_2 return tmp
function code(x, y, z, t) t_1 = Float64(Float64(y - x) * Float64(z / t)) t_2 = Float64(x + Float64(Float64(y - x) / Float64(t / z))) tmp = 0.0 if (t_1 < -1013646692435.8867) tmp = t_2; elseif (t_1 < 0.0) tmp = Float64(x + Float64(Float64(Float64(y - x) * z) / t)); else tmp = t_2; end return tmp end
function tmp_2 = code(x, y, z, t) t_1 = (y - x) * (z / t); t_2 = x + ((y - x) / (t / z)); tmp = 0.0; if (t_1 < -1013646692435.8867) tmp = t_2; elseif (t_1 < 0.0) tmp = x + (((y - x) * z) / t); else tmp = t_2; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - x), $MachinePrecision] / N[(t / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[Less[t$95$1, -1013646692435.8867], t$95$2, If[Less[t$95$1, 0.0], N[(x + N[(N[(N[(y - x), $MachinePrecision] * z), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision], t$95$2]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := \left(y - x\right) \cdot \frac{z}{t}\\
t_2 := x + \frac{y - x}{\frac{t}{z}}\\
\mathbf{if}\;t_1 < -1013646692435.8867:\\
\;\;\;\;t_2\\
\mathbf{elif}\;t_1 < 0:\\
\;\;\;\;x + \frac{\left(y - x\right) \cdot z}{t}\\
\mathbf{else}:\\
\;\;\;\;t_2\\
\end{array}
\end{array}
herbie shell --seed 2023297
(FPCore (x y z t)
:name "Graphics.Rendering.Plot.Render.Plot.Axis:tickPosition from plot-0.2.3.4"
:precision binary64
:herbie-target
(if (< (* (- y x) (/ z t)) -1013646692435.8867) (+ x (/ (- y x) (/ t z))) (if (< (* (- y x) (/ z t)) 0.0) (+ x (/ (* (- y x) z) t)) (+ x (/ (- y x) (/ t z)))))
(+ x (* (- y x) (/ z t))))