use embeded fftw3 as a subpackage#9

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rainwoodman wants to merge 35 commits intompip:masterfrom

rainwoodman:master

Commits on Feb 4, 2018

add 2d on 2d test case.
rainwoodman
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update 2don2d
rainwoodman
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add generic remap_nd interface.
rainwoodman
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Add some comments in the code.
rainwoodman
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add a 2dto1d remapping that compiles.
rainwoodman
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add interface of 2dto1d in remap.c
rainwoodman
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At least now the test case runs.
rainwoodman
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fix the 2don2d test case on 1x1.
rainwoodman
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update tests.
rainwoodman
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c2c is correct but c of r2c is wrong.
rainwoodman
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Actually c2c also doesn't work on 4x4 with 1x2.
rainwoodman
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add gather and print helpers.
rainwoodman
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rename members of fftwplan for better understanding.
rainwoodman
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commit c2c 2don2d test.
rainwoodman
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remove noisy message from api.
rainwoodman
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add the third transpose that breaks the roundtrip.
rainwoodman
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c2c_3don3d prints the array for easier consistency checks.
rainwoodman
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Minor: fix calculation of plain index (only used for generation of init data, not part of the pfft kernel)

Michael Pippig
authored and
rainwoodman
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Minor: cleanup 2dto1d remap

Michael Pippig
authored and
rainwoodman
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Minor: edit comment

Michael Pippig
authored and
rainwoodman
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bugfix: fix order of in and out arrays

Michael Pippig
authored and
rainwoodman
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Commits on Feb 8, 2018

protect critical remap_routines with needs_remap.
rainwoodman
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Commits on May 14, 2018

Commits on May 15, 2018

Commits on May 19, 2018

update the name to label the 2don2d release.
rainwoodman
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