This is the release note of v5.0.0a1. See here for the complete list of solved issues and merged PRs.

New Features

• Expose context management API in driver (#977)
• Add 'edge' and 'reflect' mode to cupy.pad (#1040, thanks @wkentaro!)
• Implement histogram (#1049, thanks @IshitaTakeshi!)
• Implement multi-dimensional image processing (#1066)
• Implement cupy.show_config and cupyx.get_runtime_info (#1067)

Enhancements

• Expose all supported dtypes from numpy (#1070)
• Support double precision atomicAdd on Maxwell or older GPUs (#1071, thanks @anaruse!)
• Use cuDNN v7 APIs to get convolution algorithms for TensorCore (#1095, thanks @anaruse!)
• Handle errors in cupy.show_config() (#1132)
• Fix to capture CuDNNError in cupyx.runtime (#1136)

Bug Fixes

• Fix moveaxis bug (#1023, thanks @fukatani!)
• Fix diagflat to fail if argument is not cupy.ndarray (#1036)
• Limit arch to the maximum value allowed in each NVRTC version (#1055)
• Fix ndarray.real and ndarray.imag to return view (#1089)
• Fix cupy.concatenate to support arrays with >= 2**31 elements (#1101)
• Use streams when calling libraries (#1107)
• Fix duplicate declaration of EigMode in cuSPARSE (#1108)
• Fix duplicate delcaration of cudaError_t (#1112)
• Fix cupy.linalg.inv() breaks its argument (#1123, thanks @hyabe!)
• Use cusolverSpSetStream for cuSolverSP library calls (#1152)
• Do not use platform-specific CC (#1157)

Documents

• Fix typos: (#1046, #1077)
• Update documentation for chainer.backends.cuda (#1047)
• Rewrite installation guide (#1064)
• Remove invalid argument description in cupy.tensordot (#1069)
• Fix document of for_unsigned_dtypes (#1076)
• Fix wrong references of document (#1078)
• Fix document of ndimage (#1131)
• Enable flake8 in cupy/indexing/generate.py (#1141)
• Fix document of r_ and c_ (#1142)
• Fix document of MemoryHook (#1143)

Installation

• Use --no-cache-dir in Dockerfile (#1060)
• Avoid embedding CUDA_PATH to RPATH in wheels (#1065)

Examples

• Avoid to import matplotlib to set its backend Agg (#976)

Tests

• Remove platform-dependent dtype (#1091)
• Remove nose dependency (#1125)