Fix atan2(a, a)#1808
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rikardn
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Jun 22, 2021
| r2 = div(mul(pi, i3), integer(-8)); | ||
| r2 = div(mul(pi, i5), integer(8)); | ||
| REQUIRE(eq(*r1, *r2)); | ||
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We should have a test for atan2(x, x)
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And also atan2(x, 0) etc to cover symbolic cases where the numerator or denominator could potentially be 0 or complex.
| return add(div(pi, index), mul(div(pi, i2), sub(sign(den), one))); | ||
| } else { | ||
| return div(pi, index); | ||
| return sub(div(pi, index), mul(div(pi, i2), sub(sign(den), one))); |
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Are complex values of num and den handled by this case?
| else | ||
| return div(pi, i2); | ||
| } | ||
| return mul(div(pi, i2), sign(num)); |
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I don't think this is correct. If we do atan2(x, 0) this will become pi/2 * sign(x), but for x = 0 this is should be NaN. Sympy keeps this case unevaluated as atan2(x, 0).
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