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Changes imported from Abseil "staging" branch:

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- aba727a5943a014392e3873349cee9dd5efc634e Avoid using 128-bit intrinsics for Clang on Windows. by Abseil Team <absl-team@google.com>
  - cdd19f1eda562af8906bff8feff827eb8e8e9797 Utilize the rtems TID infrastructure on myriad2 platforms. by Abseil Team <absl-team@google.com>
  - 52f7f55daa84ea25fa210d1b9d2bd64d128e1d81 Use intrinsic 128 bit integer when available for division... by Alex Strelnikov <strel@google.com>
  - 51f881b1152c0c861cf7fcac53f30d3c7ce12902 Merge GitHub #95: Fix compiler version check for clang-cl... by Derek Mauro <dmauro@google.com>

GitOrigin-RevId: aba727a5943a014392e3873349cee9dd5efc634e
Change-Id: I9b52d84095537acbbc96d3f74917f78da9a51156
This commit is contained in:
Abseil Team 2018-03-06 12:30:19 -08:00 • committed by Shaindel Schwartz
parent 5337d2d0e3
commit 94f0f79ecd
3 changed files with 35 additions and 7 deletions
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20
absl/base/config.h
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@ -176,16 +176,22 @@
// Checks whether the __int128 compiler extension for a 128-bit integral type is
// supported.
//
// Notes: __SIZEOF_INT128__ is defined by Clang and GCC when __int128 is
// supported, except on ppc64 and aarch64 where __int128 exists but has exhibits
// a sporadic compiler crashing bug. Nvidia's nvcc also defines __GNUC__ and
// __SIZEOF_INT128__ but not all versions actually support __int128.
// Note: __SIZEOF_INT128__ is defined by Clang and GCC when __int128 is
// supported, but we avoid using it in certain cases:
// * On Clang:
// * Building using Clang for Windows, where the Clang runtime library has
// 128-bit support only on LP64 architectures, but Windows is LLP64.
// * Building for aarch64, where __int128 exists but has exhibits a sporadic
// compiler crashing bug.
// * On Nvidia's nvcc:
// * nvcc also defines __GNUC__ and __SIZEOF_INT128__, but not all versions
// actually support __int128.
#ifdef ABSL_HAVE_INTRINSIC_INT128
#error ABSL_HAVE_INTRINSIC_INT128 cannot be directly set
#elif defined(__SIZEOF_INT128__)
#if (defined(__clang__) && !defined(__aarch64__)) || \
(defined(__CUDACC__) && __CUDACC_VER_MAJOR__ >= 9) || \
(!defined(__clang__) && !defined(__CUDACC__) && defined(__GNUC__))
#if (defined(__clang__) && !defined(_WIN32) && !defined(__aarch64__)) || \
(defined(__CUDACC__) && __CUDACC_VER_MAJOR__ >= 9) || \
(defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__))
#define ABSL_HAVE_INTRINSIC_INT128 1
#elif defined(__CUDACC__)
// __CUDACC_VER__ is a full version number before CUDA 9, and is defined to a