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Merge pull request #36617 from marload:master

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PiperOrigin-RevId: 294916821
Change-Id: I1ace34ff994058b84a714d1002d3d4637127effc
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TensorFlower Gardener 2020-02-13 08:08:40 -08:00
commit 5bad62a486
1 changed files with 38 additions and 50 deletions
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tensorflow/python/ops/distributions/special_math.py
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@ -191,56 +191,44 @@ def _ndtri(p):
# Constants used in piece-wise rational approximations. Taken from the cephes # Constants used in piece-wise rational approximations. Taken from the cephes
# library: # library:
# https://root.cern.ch/doc/v608/SpecFuncCephesInv_8cxx_source.html # https://root.cern.ch/doc/v608/SpecFuncCephesInv_8cxx_source.html
p0 = list(reversed([-5.99633501014107895267E1,
9.80010754185999661536E1, p0 = [
-5.66762857469070293439E1, -1.23916583867381258016E0, 1.39312609387279679503E1,
1.39312609387279679503E1, -5.66762857469070293439E1, 9.80010754185999661536E1,
-1.23916583867381258016E0])) -5.99633501014107895267E1
q0 = list(reversed([1.0, ]
1.95448858338141759834E0, q0 = [
4.67627912898881538453E0, -1.18331621121330003142E0, 1.59056225126211695515E1,
8.63602421390890590575E1, -8.20372256168333339912E1, 2.00260212380060660359E2,
-2.25462687854119370527E2, -2.25462687854119370527E2, 8.63602421390890590575E1,
2.00260212380060660359E2, 4.67627912898881538453E0, 1.95448858338141759834E0, 1.0
-8.20372256168333339912E1, ]
1.59056225126211695515E1, p1 = [
-1.18331621121330003142E0])) -8.57456785154685413611E-4, -3.50424626827848203418E-2,
p1 = list(reversed([4.05544892305962419923E0, -1.40256079171354495875E-1, 2.18663306850790267539E0,
3.15251094599893866154E1, 1.46849561928858024014E1, 4.40805073893200834700E1,
5.71628192246421288162E1, 5.71628192246421288162E1, 3.15251094599893866154E1,
4.40805073893200834700E1, 4.05544892305962419923E0
1.46849561928858024014E1, ]
2.18663306850790267539E0, q1 = [
-1.40256079171354495875E-1, -9.33259480895457427372E-4, -3.80806407691578277194E-2,
-3.50424626827848203418E-2, -1.42182922854787788574E-1, 2.50464946208309415979E0,
-8.57456785154685413611E-4])) 1.50425385692907503408E1, 4.13172038254672030440E1,
q1 = list(reversed([1.0, 4.53907635128879210584E1, 1.57799883256466749731E1, 1.0
1.57799883256466749731E1, ]
4.53907635128879210584E1, p2 = [
4.13172038254672030440E1, 6.23974539184983293730E-9, 2.65806974686737550832E-6,
1.50425385692907503408E1, 3.01581553508235416007E-4, 1.23716634817820021358E-2,
2.50464946208309415979E0, 2.01485389549179081538E-1, 1.33303460815807542389E0,
-1.42182922854787788574E-1, 3.93881025292474443415E0, 6.91522889068984211695E0,
-3.80806407691578277194E-2, 3.23774891776946035970E0
-9.33259480895457427372E-4])) ]
p2 = list(reversed([3.23774891776946035970E0, q2 = [
6.91522889068984211695E0, 6.79019408009981274425E-9, 2.89247864745380683936E-6,
3.93881025292474443415E0, 3.28014464682127739104E-4, 1.34204006088543189037E-2,
1.33303460815807542389E0, 2.16236993594496635890E-1, 1.37702099489081330271E0,
2.01485389549179081538E-1, 3.67983563856160859403E0, 6.02427039364742014255E0, 1.0
1.23716634817820021358E-2, ]
3.01581553508235416007E-4,
2.65806974686737550832E-6,
6.23974539184983293730E-9]))
q2 = list(reversed([1.0,
6.02427039364742014255E0,
3.67983563856160859403E0,
1.37702099489081330271E0,
2.16236993594496635890E-1,
1.34204006088543189037E-2,
3.28014464682127739104E-4,
2.89247864745380683936E-6,
6.79019408009981274425E-9]))
def _create_polynomial(var, coeffs): def _create_polynomial(var, coeffs):
"""Compute n_th order polynomial via Horner's method.""" """Compute n_th order polynomial via Horner's method."""