This is the release note of v6.0.0a1. See here for the complete list of solved issues and merged PRs.

Highlights

• Improved support of random sampling functions (cupy.random.*); see the list below for details.

New Features

• Support astype in fused functions (#1586)
• Add float16 and float64 support for scatter_add (#1707, #1684, thanks @uchida!)
• Add random sampling functions
  • cupy.random.hypergeometric (#1625)
  • cupy.random.logistic (#1626)
  • cupy.random.logseries (#1628)
  • cupy.random.power (#1629)
  • cupy.random.rayleigh (#1630)
  • cupy.random.triangular (#1631)
  • cupy.random.wald (#1632)
  • cupy.random.weibull (#1633)
  • cupy.random.negative_binomial (#1635)
  • cupy.random.noncentral_chisquare (#1637)
  • cupy.random.noncentral_f (#1637)

Enhancements

• Update ndimage to support SciPy 1.0+ (#1606)
• Improve reduction code for performance (#1668)
• Device comparison with non-Device class (#1672)
• Fix ufunc performance degradation (#1714)
• Code enhancements
  • Minor refactoring in random kernels (#1641)
  • Reorder definitions of distribution kernels (#1681)
  • Update einsum optimization routine (#1718)
  • Remove unnecessary intermediate data in FP16 atomicAdd (#1706)

Bug Fixes

• Fix float16 nextafter (#1665, thanks @toru-fukaya!)
• Fix NVRTC error in cupy.random.hypergeometric (#1688)
• Fix cupy.random.rand to not generate 1 (#1701)
• Fix comparison with NumPy scalar (#1727)
• Fix ndarray.__iter__ to raise TypeError correctly for 0-d arrays (#1697)
• Add complex support in solve (#1524, #1674 thanks @boeddeker!)

Documentation

• Fix typo in docstring for cupy.linalg.slogdet (#1667, thanks @fiarabbit!)
• Add licenses of distribution kernels from numpy (#1680)
• Fix math docs of cupy.random (#1685)
• Explain that -ftz=true affects nextafter (#1717)
• Drop support for CUDA 7.0 / 7.5 (#1722)
• Add support for NumPy 1.15 in docs (#1728)
• Add Python 3.7 support to installation docs (#1739)

Installation

• Reorganize setup requirements (#1478)
• Update base docker image (#1723)

Tests

• Tentatively skip failing test_nextafter_combination (#1687)
• Compare distributions between cupy and numpy by two-sample K-S test (#1300)
• Improve floating point tests (#1673)
• Mark slow cupy.random tests (#1677)
• Add more K-S tests (#1678)
• Minor fixes to cupy.random tests (#1679)
• Fix TestRandintDtype was slow (#1682)
• Ignore scipy<1.0 is warned by using deprecated feature of numpy>=1.15 (#1702)
• Workaround for test failure when Python 3.4 + SciPy 0.x + NumPy 0.15 (#1732)
• Fix test for Python 3.7 (#1743)

Others

• Add header file generated by Cython to gitignore (#1700)