FastMath dist4

Percentage Accurate: 87.7% → 97.2%

Time: 7.1s

Alternatives: 11

Speedup: 1.5×

• 34.1% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \end{array} \]

FPCore

(FPCore (d1 d2 d3 d4)
 :precision binary64
 (- (+ (- (* d1 d2) (* d1 d3)) (* d4 d1)) (* d1 d1)))

C

double code(double d1, double d2, double d3, double d4) {
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    code = (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1)
end function

Java

public static double code(double d1, double d2, double d3, double d4) {
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
}

Python

def code(d1, d2, d3, d4):
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1)

Julia

function code(d1, d2, d3, d4)
	return Float64(Float64(Float64(Float64(d1 * d2) - Float64(d1 * d3)) + Float64(d4 * d1)) - Float64(d1 * d1))
end

MATLAB

function tmp = code(d1, d2, d3, d4)
	tmp = (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
end

Wolfram

code[d1_, d2_, d3_, d4_] := N[(N[(N[(N[(d1 * d2), $MachinePrecision] - N[(d1 * d3), $MachinePrecision]), $MachinePrecision] + N[(d4 * d1), $MachinePrecision]), $MachinePrecision] - N[(d1 * d1), $MachinePrecision]), $MachinePrecision]

Initial Program: 87.7% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \end{array} \]

FPCore

(FPCore (d1 d2 d3 d4)
 :precision binary64
 (- (+ (- (* d1 d2) (* d1 d3)) (* d4 d1)) (* d1 d1)))

C

double code(double d1, double d2, double d3, double d4) {
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    code = (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1)
end function

Java

public static double code(double d1, double d2, double d3, double d4) {
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
}

Python

def code(d1, d2, d3, d4):
	return (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1)

Julia

function code(d1, d2, d3, d4)
	return Float64(Float64(Float64(Float64(d1 * d2) - Float64(d1 * d3)) + Float64(d4 * d1)) - Float64(d1 * d1))
end

MATLAB

function tmp = code(d1, d2, d3, d4)
	tmp = (((d1 * d2) - (d1 * d3)) + (d4 * d1)) - (d1 * d1);
end

Wolfram

code[d1_, d2_, d3_, d4_] := N[(N[(N[(N[(d1 * d2), $MachinePrecision] - N[(d1 * d3), $MachinePrecision]), $MachinePrecision] + N[(d4 * d1), $MachinePrecision]), $MachinePrecision] - N[(d1 * d1), $MachinePrecision]), $MachinePrecision]

Alternative 1: 97.2% accurate, 1.0× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d1 \leq 1.48 \cdot 10^{+121}:\\ \;\;\;\;\mathsf{fma}\left(-d3, d1, \mathsf{fma}\left(d1, d4 + d2, \left(-d1\right) \cdot d1\right)\right)\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d1 1.48e+121)
   (fma (- d3) d1 (fma d1 (+ d4 d2) (* (- d1) d1)))
   (* d1 (+ (- d4 d3) (- d1)))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d1 <= 1.48e+121) {
		tmp = fma(-d3, d1, fma(d1, (d4 + d2), (-d1 * d1)));
	} else {
		tmp = d1 * ((d4 - d3) + -d1);
	}
	return tmp;
}

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d1 <= 1.48e+121)
		tmp = fma(Float64(-d3), d1, fma(d1, Float64(d4 + d2), Float64(Float64(-d1) * d1)));
	else
		tmp = Float64(d1 * Float64(Float64(d4 - d3) + Float64(-d1)));
	end
	return tmp
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d1, 1.48e+121], N[((-d3) * d1 + N[(d1 * N[(d4 + d2), $MachinePrecision] + N[((-d1) * d1), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(d1 * N[(N[(d4 - d3), $MachinePrecision] + (-d1)), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d1 < 1.4800000000000001e121

   1. Initial program 92.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   4. Applied rewrites 99.0%

      \[\leadsto \color{blue}{\mathsf{fma}\left(-d3, d1, \mathsf{fma}\left(d1, d4 + d2, \left(-d1\right) \cdot d1\right)\right)} \]

   if 1.4800000000000001e121 < d1

   1. Initial program 61.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   4. Applied rewrites 85.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d2, d1, \mathsf{fma}\left(d1, d4 - d3, \left(-d1\right) \cdot d1\right)\right)} \]

   5. Taylor expanded in d2 around 0

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2} + d1 \cdot \left(d4 - d3\right)} \]

   7. Applied rewrites 85.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d4 - d3, d1, \left(-d1\right) \cdot d1\right)} \]

   9. Applied rewrites 95.2%

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 2: 97.1% accurate, 1.0× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d1 \leq 6.1 \cdot 10^{+121}:\\ \;\;\;\;\mathsf{fma}\left(d2, d1, \mathsf{fma}\left(d1, d4 - d3, \left(-d1\right) \cdot d1\right)\right)\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d1 6.1e+121)
   (fma d2 d1 (fma d1 (- d4 d3) (* (- d1) d1)))
   (* d1 (+ (- d4 d3) (- d1)))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d1 <= 6.1e+121) {
		tmp = fma(d2, d1, fma(d1, (d4 - d3), (-d1 * d1)));
	} else {
		tmp = d1 * ((d4 - d3) + -d1);
	}
	return tmp;
}

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d1 <= 6.1e+121)
		tmp = fma(d2, d1, fma(d1, Float64(d4 - d3), Float64(Float64(-d1) * d1)));
	else
		tmp = Float64(d1 * Float64(Float64(d4 - d3) + Float64(-d1)));
	end
	return tmp
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d1, 6.1e+121], N[(d2 * d1 + N[(d1 * N[(d4 - d3), $MachinePrecision] + N[((-d1) * d1), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(d1 * N[(N[(d4 - d3), $MachinePrecision] + (-d1)), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d1 < 6.0999999999999998e121

   1. Initial program 92.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   4. Applied rewrites 98.6%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d2, d1, \mathsf{fma}\left(d1, d4 - d3, \left(-d1\right) \cdot d1\right)\right)} \]

   if 6.0999999999999998e121 < d1

   1. Initial program 61.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   4. Applied rewrites 85.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d2, d1, \mathsf{fma}\left(d1, d4 - d3, \left(-d1\right) \cdot d1\right)\right)} \]

   5. Taylor expanded in d2 around 0

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2} + d1 \cdot \left(d4 - d3\right)} \]

   7. Applied rewrites 85.7%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d4 - d3, d1, \left(-d1\right) \cdot d1\right)} \]

   9. Applied rewrites 95.2%

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 3: 53.3% accurate, 1.2× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d4 \leq 5.5 \cdot 10^{-306}:\\ \;\;\;\;d2 \cdot d1\\ \mathbf{elif}\;d4 \leq 1.2 \cdot 10^{-51}:\\ \;\;\;\;\left(-d1\right) \cdot d1\\ \mathbf{elif}\;d4 \leq 1.4 \cdot 10^{+97}:\\ \;\;\;\;\left(-d3\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;d4 \cdot d1\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d4 5.5e-306)
   (* d2 d1)
   (if (<= d4 1.2e-51)
     (* (- d1) d1)
     (if (<= d4 1.4e+97) (* (- d3) d1) (* d4 d1)))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 5.5e-306) {
		tmp = d2 * d1;
	} else if (d4 <= 1.2e-51) {
		tmp = -d1 * d1;
	} else if (d4 <= 1.4e+97) {
		tmp = -d3 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d4 <= 5.5d-306) then
        tmp = d2 * d1
    else if (d4 <= 1.2d-51) then
        tmp = -d1 * d1
    else if (d4 <= 1.4d+97) then
        tmp = -d3 * d1
    else
        tmp = d4 * d1
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 5.5e-306) {
		tmp = d2 * d1;
	} else if (d4 <= 1.2e-51) {
		tmp = -d1 * d1;
	} else if (d4 <= 1.4e+97) {
		tmp = -d3 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d4 <= 5.5e-306:
		tmp = d2 * d1
	elif d4 <= 1.2e-51:
		tmp = -d1 * d1
	elif d4 <= 1.4e+97:
		tmp = -d3 * d1
	else:
		tmp = d4 * d1
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d4 <= 5.5e-306)
		tmp = Float64(d2 * d1);
	elseif (d4 <= 1.2e-51)
		tmp = Float64(Float64(-d1) * d1);
	elseif (d4 <= 1.4e+97)
		tmp = Float64(Float64(-d3) * d1);
	else
		tmp = Float64(d4 * d1);
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d4 <= 5.5e-306)
		tmp = d2 * d1;
	elseif (d4 <= 1.2e-51)
		tmp = -d1 * d1;
	elseif (d4 <= 1.4e+97)
		tmp = -d3 * d1;
	else
		tmp = d4 * d1;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d4, 5.5e-306], N[(d2 * d1), $MachinePrecision], If[LessEqual[d4, 1.2e-51], N[((-d1) * d1), $MachinePrecision], If[LessEqual[d4, 1.4e+97], N[((-d3) * d1), $MachinePrecision], N[(d4 * d1), $MachinePrecision]]]]

Derivation

1. Split input into 4 regimes

2. if d4 < 5.49999999999999992e-306

   1. Initial program 88.5%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d2 around inf

      \[\leadsto \color{blue}{d1 \cdot d2} \]

   5. Applied rewrites 33.3%

      \[\leadsto \color{blue}{d2 \cdot d1} \]

   if 5.49999999999999992e-306 < d4 < 1.2e-51

   1. Initial program 86.7%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around inf

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2}} \]

   5. Applied rewrites 52.6%

      \[\leadsto \color{blue}{\left(-d1\right) \cdot d1} \]

   if 1.2e-51 < d4 < 1.4e97

   1. Initial program 93.4%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d3 around inf

      \[\leadsto \color{blue}{-1 \cdot \left(d1 \cdot d3\right)} \]

   5. Applied rewrites 21.5%

      \[\leadsto \color{blue}{\left(-d3\right) \cdot d1} \]

   if 1.4e97 < d4

   1. Initial program 82.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d4 around inf

      \[\leadsto \color{blue}{d1 \cdot d4} \]

   5. Applied rewrites 55.5%

      \[\leadsto \color{blue}{d4 \cdot d1} \]
3. Recombined 4 regimes into one program.
4. Add Preprocessing

Alternative 4: 87.7% accurate, 1.2× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} t_0 := \left(-d1\right) \cdot d1\\ \mathbf{if}\;d1 \leq -1.1 \cdot 10^{+174}:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;d1 \leq 2.55 \cdot 10^{+172}:\\ \;\;\;\;\left(\left(d4 + d2\right) - d3\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (let* ((t_0 (* (- d1) d1)))
   (if (<= d1 -1.1e+174)
     t_0
     (if (<= d1 2.55e+172) (* (- (+ d4 d2) d3) d1) t_0))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double t_0 = -d1 * d1;
	double tmp;
	if (d1 <= -1.1e+174) {
		tmp = t_0;
	} else if (d1 <= 2.55e+172) {
		tmp = ((d4 + d2) - d3) * d1;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: t_0
    real(8) :: tmp
    t_0 = -d1 * d1
    if (d1 <= (-1.1d+174)) then
        tmp = t_0
    else if (d1 <= 2.55d+172) then
        tmp = ((d4 + d2) - d3) * d1
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double t_0 = -d1 * d1;
	double tmp;
	if (d1 <= -1.1e+174) {
		tmp = t_0;
	} else if (d1 <= 2.55e+172) {
		tmp = ((d4 + d2) - d3) * d1;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	t_0 = -d1 * d1
	tmp = 0
	if d1 <= -1.1e+174:
		tmp = t_0
	elif d1 <= 2.55e+172:
		tmp = ((d4 + d2) - d3) * d1
	else:
		tmp = t_0
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	t_0 = Float64(Float64(-d1) * d1)
	tmp = 0.0
	if (d1 <= -1.1e+174)
		tmp = t_0;
	elseif (d1 <= 2.55e+172)
		tmp = Float64(Float64(Float64(d4 + d2) - d3) * d1);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	t_0 = -d1 * d1;
	tmp = 0.0;
	if (d1 <= -1.1e+174)
		tmp = t_0;
	elseif (d1 <= 2.55e+172)
		tmp = ((d4 + d2) - d3) * d1;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := Block[{t$95$0 = N[((-d1) * d1), $MachinePrecision]}, If[LessEqual[d1, -1.1e+174], t$95$0, If[LessEqual[d1, 2.55e+172], N[(N[(N[(d4 + d2), $MachinePrecision] - d3), $MachinePrecision] * d1), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if d1 < -1.1000000000000001e174 or 2.55e172 < d1

   1. Initial program 51.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around inf

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2}} \]

   5. Applied rewrites 90.7%

      \[\leadsto \color{blue}{\left(-d1\right) \cdot d1} \]

   if -1.1000000000000001e174 < d1 < 2.55e172

   1. Initial program 97.5%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 92.3%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 5: 66.8% accurate, 1.4× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} t_0 := \left(-d3\right) \cdot d1\\ \mathbf{if}\;d3 \leq -1.9 \cdot 10^{+107}:\\ \;\;\;\;t\_0\\ \mathbf{elif}\;d3 \leq 2.35 \cdot 10^{+207}:\\ \;\;\;\;\left(d4 + d2\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;t\_0\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (let* ((t_0 (* (- d3) d1)))
   (if (<= d3 -1.9e+107) t_0 (if (<= d3 2.35e+207) (* (+ d4 d2) d1) t_0))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double t_0 = -d3 * d1;
	double tmp;
	if (d3 <= -1.9e+107) {
		tmp = t_0;
	} else if (d3 <= 2.35e+207) {
		tmp = (d4 + d2) * d1;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: t_0
    real(8) :: tmp
    t_0 = -d3 * d1
    if (d3 <= (-1.9d+107)) then
        tmp = t_0
    else if (d3 <= 2.35d+207) then
        tmp = (d4 + d2) * d1
    else
        tmp = t_0
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double t_0 = -d3 * d1;
	double tmp;
	if (d3 <= -1.9e+107) {
		tmp = t_0;
	} else if (d3 <= 2.35e+207) {
		tmp = (d4 + d2) * d1;
	} else {
		tmp = t_0;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	t_0 = -d3 * d1
	tmp = 0
	if d3 <= -1.9e+107:
		tmp = t_0
	elif d3 <= 2.35e+207:
		tmp = (d4 + d2) * d1
	else:
		tmp = t_0
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	t_0 = Float64(Float64(-d3) * d1)
	tmp = 0.0
	if (d3 <= -1.9e+107)
		tmp = t_0;
	elseif (d3 <= 2.35e+207)
		tmp = Float64(Float64(d4 + d2) * d1);
	else
		tmp = t_0;
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	t_0 = -d3 * d1;
	tmp = 0.0;
	if (d3 <= -1.9e+107)
		tmp = t_0;
	elseif (d3 <= 2.35e+207)
		tmp = (d4 + d2) * d1;
	else
		tmp = t_0;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := Block[{t$95$0 = N[((-d3) * d1), $MachinePrecision]}, If[LessEqual[d3, -1.9e+107], t$95$0, If[LessEqual[d3, 2.35e+207], N[(N[(d4 + d2), $MachinePrecision] * d1), $MachinePrecision], t$95$0]]]

Derivation

1. Split input into 2 regimes

2. if d3 < -1.8999999999999999e107 or 2.34999999999999988e207 < d3

   1. Initial program 78.3%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d3 around inf

      \[\leadsto \color{blue}{-1 \cdot \left(d1 \cdot d3\right)} \]

   5. Applied rewrites 81.1%

      \[\leadsto \color{blue}{\left(-d3\right) \cdot d1} \]

   if -1.8999999999999999e107 < d3 < 2.34999999999999988e207

   1. Initial program 90.8%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 79.0%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   6. Taylor expanded in d3 around 0

      \[\leadsto \left(d2 + d4\right) \cdot d1 \]

   8. Applied rewrites 68.6%

      \[\leadsto \left(d4 + d2\right) \cdot d1 \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 6: 52.4% accurate, 1.5× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d2 \leq -20000000000000:\\ \;\;\;\;d2 \cdot d1\\ \mathbf{elif}\;d2 \leq -9.2 \cdot 10^{-209}:\\ \;\;\;\;\left(-d1\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;d4 \cdot d1\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d2 -20000000000000.0)
   (* d2 d1)
   (if (<= d2 -9.2e-209) (* (- d1) d1) (* d4 d1))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d2 <= -20000000000000.0) {
		tmp = d2 * d1;
	} else if (d2 <= -9.2e-209) {
		tmp = -d1 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d2 <= (-20000000000000.0d0)) then
        tmp = d2 * d1
    else if (d2 <= (-9.2d-209)) then
        tmp = -d1 * d1
    else
        tmp = d4 * d1
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d2 <= -20000000000000.0) {
		tmp = d2 * d1;
	} else if (d2 <= -9.2e-209) {
		tmp = -d1 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d2 <= -20000000000000.0:
		tmp = d2 * d1
	elif d2 <= -9.2e-209:
		tmp = -d1 * d1
	else:
		tmp = d4 * d1
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d2 <= -20000000000000.0)
		tmp = Float64(d2 * d1);
	elseif (d2 <= -9.2e-209)
		tmp = Float64(Float64(-d1) * d1);
	else
		tmp = Float64(d4 * d1);
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d2 <= -20000000000000.0)
		tmp = d2 * d1;
	elseif (d2 <= -9.2e-209)
		tmp = -d1 * d1;
	else
		tmp = d4 * d1;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d2, -20000000000000.0], N[(d2 * d1), $MachinePrecision], If[LessEqual[d2, -9.2e-209], N[((-d1) * d1), $MachinePrecision], N[(d4 * d1), $MachinePrecision]]]

Derivation

1. Split input into 3 regimes

2. if d2 < -2e13

   1. Initial program 80.3%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d2 around inf

      \[\leadsto \color{blue}{d1 \cdot d2} \]

   5. Applied rewrites 57.8%

      \[\leadsto \color{blue}{d2 \cdot d1} \]

   if -2e13 < d2 < -9.1999999999999999e-209

   1. Initial program 94.3%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around inf

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2}} \]

   5. Applied rewrites 44.1%

      \[\leadsto \color{blue}{\left(-d1\right) \cdot d1} \]

   if -9.1999999999999999e-209 < d2

   1. Initial program 88.4%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d4 around inf

      \[\leadsto \color{blue}{d1 \cdot d4} \]

   5. Applied rewrites 33.7%

      \[\leadsto \color{blue}{d4 \cdot d1} \]
3. Recombined 3 regimes into one program.
4. Add Preprocessing

Alternative 7: 93.9% accurate, 1.5× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d2 \leq -8000000000000:\\ \;\;\;\;\left(\left(d4 + d2\right) - d3\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d2 -8000000000000.0)
   (* (- (+ d4 d2) d3) d1)
   (* d1 (+ (- d4 d3) (- d1)))))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d2 <= -8000000000000.0) {
		tmp = ((d4 + d2) - d3) * d1;
	} else {
		tmp = d1 * ((d4 - d3) + -d1);
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d2 <= (-8000000000000.0d0)) then
        tmp = ((d4 + d2) - d3) * d1
    else
        tmp = d1 * ((d4 - d3) + -d1)
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d2 <= -8000000000000.0) {
		tmp = ((d4 + d2) - d3) * d1;
	} else {
		tmp = d1 * ((d4 - d3) + -d1);
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d2 <= -8000000000000.0:
		tmp = ((d4 + d2) - d3) * d1
	else:
		tmp = d1 * ((d4 - d3) + -d1)
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d2 <= -8000000000000.0)
		tmp = Float64(Float64(Float64(d4 + d2) - d3) * d1);
	else
		tmp = Float64(d1 * Float64(Float64(d4 - d3) + Float64(-d1)));
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d2 <= -8000000000000.0)
		tmp = ((d4 + d2) - d3) * d1;
	else
		tmp = d1 * ((d4 - d3) + -d1);
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d2, -8000000000000.0], N[(N[(N[(d4 + d2), $MachinePrecision] - d3), $MachinePrecision] * d1), $MachinePrecision], N[(d1 * N[(N[(d4 - d3), $MachinePrecision] + (-d1)), $MachinePrecision]), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d2 < -8e12

   1. Initial program 80.3%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 91.0%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   if -8e12 < d2

   1. Initial program 90.0%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   4. Applied rewrites 97.5%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d2, d1, \mathsf{fma}\left(d1, d4 - d3, \left(-d1\right) \cdot d1\right)\right)} \]

   5. Taylor expanded in d2 around 0

      \[\leadsto \color{blue}{-1 \cdot {d1}^{2} + d1 \cdot \left(d4 - d3\right)} \]

   7. Applied rewrites 78.9%

      \[\leadsto \color{blue}{\mathsf{fma}\left(d4 - d3, d1, \left(-d1\right) \cdot d1\right)} \]

   9. Applied rewrites 80.4%

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d4 - d3\right) + \left(-d1\right)\right)} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 8: 74.5% accurate, 2.0× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d4 \leq 1.9 \cdot 10^{-33}:\\ \;\;\;\;\left(d2 - d3\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;\left(d4 - d3\right) \cdot d1\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d4 1.9e-33) (* (- d2 d3) d1) (* (- d4 d3) d1)))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 1.9e-33) {
		tmp = (d2 - d3) * d1;
	} else {
		tmp = (d4 - d3) * d1;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d4 <= 1.9d-33) then
        tmp = (d2 - d3) * d1
    else
        tmp = (d4 - d3) * d1
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 1.9e-33) {
		tmp = (d2 - d3) * d1;
	} else {
		tmp = (d4 - d3) * d1;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d4 <= 1.9e-33:
		tmp = (d2 - d3) * d1
	else:
		tmp = (d4 - d3) * d1
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d4 <= 1.9e-33)
		tmp = Float64(Float64(d2 - d3) * d1);
	else
		tmp = Float64(Float64(d4 - d3) * d1);
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d4 <= 1.9e-33)
		tmp = (d2 - d3) * d1;
	else
		tmp = (d4 - d3) * d1;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d4, 1.9e-33], N[(N[(d2 - d3), $MachinePrecision] * d1), $MachinePrecision], N[(N[(d4 - d3), $MachinePrecision] * d1), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d4 < 1.89999999999999997e-33

   1. Initial program 87.7%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 78.6%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   6. Taylor expanded in d2 around inf

      \[\leadsto \left(d2 - d3\right) \cdot d1 \]

   8. Applied rewrites 63.8%

      \[\leadsto \left(d2 - d3\right) \cdot d1 \]

   if 1.89999999999999997e-33 < d4

   1. Initial program 88.2%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 89.9%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   6. Taylor expanded in d2 around 0

      \[\leadsto \left(d4 - d3\right) \cdot d1 \]

   8. Applied rewrites 60.1%

      \[\leadsto \left(d4 - d3\right) \cdot d1 \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 9: 72.2% accurate, 2.0× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d4 \leq 13600000000:\\ \;\;\;\;\left(d2 - d3\right) \cdot d1\\ \mathbf{else}:\\ \;\;\;\;\left(d4 + d2\right) \cdot d1\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d4 13600000000.0) (* (- d2 d3) d1) (* (+ d4 d2) d1)))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 13600000000.0) {
		tmp = (d2 - d3) * d1;
	} else {
		tmp = (d4 + d2) * d1;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d4 <= 13600000000.0d0) then
        tmp = (d2 - d3) * d1
    else
        tmp = (d4 + d2) * d1
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 13600000000.0) {
		tmp = (d2 - d3) * d1;
	} else {
		tmp = (d4 + d2) * d1;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d4 <= 13600000000.0:
		tmp = (d2 - d3) * d1
	else:
		tmp = (d4 + d2) * d1
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d4 <= 13600000000.0)
		tmp = Float64(Float64(d2 - d3) * d1);
	else
		tmp = Float64(Float64(d4 + d2) * d1);
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d4 <= 13600000000.0)
		tmp = (d2 - d3) * d1;
	else
		tmp = (d4 + d2) * d1;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d4, 13600000000.0], N[(N[(d2 - d3), $MachinePrecision] * d1), $MachinePrecision], N[(N[(d4 + d2), $MachinePrecision] * d1), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d4 < 1.36e10

   1. Initial program 88.5%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 79.5%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   6. Taylor expanded in d2 around inf

      \[\leadsto \left(d2 - d3\right) \cdot d1 \]

   8. Applied rewrites 63.4%

      \[\leadsto \left(d2 - d3\right) \cdot d1 \]

   if 1.36e10 < d4

   1. Initial program 85.4%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d1 around 0

      \[\leadsto \color{blue}{d1 \cdot \left(\left(d2 + d4\right) - d3\right)} \]

   5. Applied rewrites 89.4%

      \[\leadsto \color{blue}{\left(\left(d4 + d2\right) - d3\right) \cdot d1} \]

   6. Taylor expanded in d3 around 0

      \[\leadsto \left(d2 + d4\right) \cdot d1 \]

   8. Applied rewrites 76.3%

      \[\leadsto \left(d4 + d2\right) \cdot d1 \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 10: 49.4% accurate, 2.5× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ \begin{array}{l} \mathbf{if}\;d4 \leq 5.2 \cdot 10^{-24}:\\ \;\;\;\;d2 \cdot d1\\ \mathbf{else}:\\ \;\;\;\;d4 \cdot d1\\ \end{array} \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4)
 :precision binary64
 (if (<= d4 5.2e-24) (* d2 d1) (* d4 d1)))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 5.2e-24) {
		tmp = d2 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    real(8) :: tmp
    if (d4 <= 5.2d-24) then
        tmp = d2 * d1
    else
        tmp = d4 * d1
    end if
    code = tmp
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	double tmp;
	if (d4 <= 5.2e-24) {
		tmp = d2 * d1;
	} else {
		tmp = d4 * d1;
	}
	return tmp;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	tmp = 0
	if d4 <= 5.2e-24:
		tmp = d2 * d1
	else:
		tmp = d4 * d1
	return tmp

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	tmp = 0.0
	if (d4 <= 5.2e-24)
		tmp = Float64(d2 * d1);
	else
		tmp = Float64(d4 * d1);
	end
	return tmp
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp_2 = code(d1, d2, d3, d4)
	tmp = 0.0;
	if (d4 <= 5.2e-24)
		tmp = d2 * d1;
	else
		tmp = d4 * d1;
	end
	tmp_2 = tmp;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := If[LessEqual[d4, 5.2e-24], N[(d2 * d1), $MachinePrecision], N[(d4 * d1), $MachinePrecision]]

Derivation

1. Split input into 2 regimes

2. if d4 < 5.2e-24

   1. Initial program 87.8%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d2 around inf

      \[\leadsto \color{blue}{d1 \cdot d2} \]

   5. Applied rewrites 35.2%

      \[\leadsto \color{blue}{d2 \cdot d1} \]

   if 5.2e-24 < d4

   1. Initial program 87.9%

      \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
   2. Add Preprocessing

   3. Taylor expanded in d4 around inf

      \[\leadsto \color{blue}{d1 \cdot d4} \]

   5. Applied rewrites 50.8%

      \[\leadsto \color{blue}{d4 \cdot d1} \]
3. Recombined 2 regimes into one program.
4. Add Preprocessing

Alternative 11: 30.5% accurate, 5.0× speedup

Math

\[\begin{array}{l} [d1, d2, d3, d4] = \mathsf{sort}([d1, d2, d3, d4])\\ \\ d2 \cdot d1 \end{array} \]

FPCore

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
(FPCore (d1 d2 d3 d4) :precision binary64 (* d2 d1))

C

assert(d1 < d2 && d2 < d3 && d3 < d4);
double code(double d1, double d2, double d3, double d4) {
	return d2 * d1;
}

Fortran

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    code = d2 * d1
end function

Java

assert d1 < d2 && d2 < d3 && d3 < d4;
public static double code(double d1, double d2, double d3, double d4) {
	return d2 * d1;
}

Python

[d1, d2, d3, d4] = sort([d1, d2, d3, d4])
def code(d1, d2, d3, d4):
	return d2 * d1

Julia

d1, d2, d3, d4 = sort([d1, d2, d3, d4])
function code(d1, d2, d3, d4)
	return Float64(d2 * d1)
end

MATLAB

d1, d2, d3, d4 = num2cell(sort([d1, d2, d3, d4])){:}
function tmp = code(d1, d2, d3, d4)
	tmp = d2 * d1;
end

Wolfram

NOTE: d1, d2, d3, and d4 should be sorted in increasing order before calling this function.
code[d1_, d2_, d3_, d4_] := N[(d2 * d1), $MachinePrecision]

Derivation

1. Initial program 87.8%

   \[\left(\left(d1 \cdot d2 - d1 \cdot d3\right) + d4 \cdot d1\right) - d1 \cdot d1 \]
2. Add Preprocessing

3. Taylor expanded in d2 around inf

   \[\leadsto \color{blue}{d1 \cdot d2} \]

5. Applied rewrites 35.1%

   \[\leadsto \color{blue}{d2 \cdot d1} \]
6. Add Preprocessing

Developer Target 1: 100.0% accurate, 2.0× speedup

Math

\[\begin{array}{l} \\ d1 \cdot \left(\left(\left(d2 - d3\right) + d4\right) - d1\right) \end{array} \]

FPCore

(FPCore (d1 d2 d3 d4) :precision binary64 (* d1 (- (+ (- d2 d3) d4) d1)))

C

double code(double d1, double d2, double d3, double d4) {
	return d1 * (((d2 - d3) + d4) - d1);
}

Fortran

module fmin_fmax_functions
    implicit none
    private
    public fmax
    public fmin

    interface fmax
        module procedure fmax88
        module procedure fmax44
        module procedure fmax84
        module procedure fmax48
    end interface
    interface fmin
        module procedure fmin88
        module procedure fmin44
        module procedure fmin84
        module procedure fmin48
    end interface
contains
    real(8) function fmax88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(4) function fmax44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, max(x, y), y /= y), x /= x)
    end function
    real(8) function fmax84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmax48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
    end function
    real(8) function fmin88(x, y) result (res)
        real(8), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(4) function fmin44(x, y) result (res)
        real(4), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(y, merge(x, min(x, y), y /= y), x /= x)
    end function
    real(8) function fmin84(x, y) result(res)
        real(8), intent (in) :: x
        real(4), intent (in) :: y
        res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
    end function
    real(8) function fmin48(x, y) result(res)
        real(4), intent (in) :: x
        real(8), intent (in) :: y
        res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
    end function
end module

real(8) function code(d1, d2, d3, d4)
use fmin_fmax_functions
    real(8), intent (in) :: d1
    real(8), intent (in) :: d2
    real(8), intent (in) :: d3
    real(8), intent (in) :: d4
    code = d1 * (((d2 - d3) + d4) - d1)
end function

Java

public static double code(double d1, double d2, double d3, double d4) {
	return d1 * (((d2 - d3) + d4) - d1);
}

Python

def code(d1, d2, d3, d4):
	return d1 * (((d2 - d3) + d4) - d1)

Julia

function code(d1, d2, d3, d4)
	return Float64(d1 * Float64(Float64(Float64(d2 - d3) + d4) - d1))
end

MATLAB

function tmp = code(d1, d2, d3, d4)
	tmp = d1 * (((d2 - d3) + d4) - d1);
end

Wolfram

code[d1_, d2_, d3_, d4_] := N[(d1 * N[(N[(N[(d2 - d3), $MachinePrecision] + d4), $MachinePrecision] - d1), $MachinePrecision]), $MachinePrecision]

Reproduce

herbie shell --seed 2025036 -o generate:simplify -o generate:proofs
(FPCore (d1 d2 d3 d4)
  :name "FastMath dist4"
  :precision binary64

  :alt
  (! :herbie-platform default (* d1 (- (+ (- d2 d3) d4) d1)))

  (- (+ (- (* d1 d2) (* d1 d3)) (* d4 d1)) (* d1 d1)))