?

\[e^{-\left(1 - x \cdot x\right)} \]

(FPCore (x) :precision binary64 (exp (- (- 1.0 (* x x)))))

double code(double x) {
	return exp(-(1.0 - (x * x)));
}

real(8) function code(x)
    real(8), intent (in) :: x
    code = exp(-(1.0d0 - (x * x)))
end function

public static double code(double x) {
	return Math.exp(-(1.0 - (x * x)));
}

def code(x):
	return math.exp(-(1.0 - (x * x)))

function code(x)
	return exp(Float64(-Float64(1.0 - Float64(x * x))))
end

function tmp = code(x)
	tmp = exp(-(1.0 - (x * x)));
end

code[x_] := N[Exp[(-N[(1.0 - N[(x * x), $MachinePrecision]), $MachinePrecision])], $MachinePrecision]

e^{-\left(1 - x \cdot x\right)}

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023241 
(FPCore (x)
  :name "exp neg sub"
  :precision binary64
  (exp (- (- 1.0 (* x x)))))

match: no matching clause for 'ival		L	C
compile-progs	/home/nightlies/herbie/arb-support/src/programs.rkt	122	0
make-search-func	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	20	0
sample-points	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	64	0
setup-context!	/home/nightlies/herbie/arb-support/src/mainloop.rkt	293	0
get-alternatives/report	/home/nightlies/herbie/arb-support/src/sandbox.rkt	148	0
(unnamed)	/home/nightlies/herbie/arb-support/src/sandbox.rkt	247	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24