secp256k1_u128_rshift should use __shiftright128 intrinsic on MSVC #1324

1. 
   real-or-random commented at 9:18 am on May 24, 2023: contributor

   https://learn.microsoft.com/en-us/cpp/intrinsics/shiftright128?view=msvc-170
2. real-or-random added the label performance on May 24, 2023
3. real-or-random renamed this:
   secp256k1_u128_rshift could __shiftright128 intrinsic on MSVC
   secp256k1_u128_rshift should use __shiftright128 intrinsic on MSVC
   on May 24, 2023
4. hebasto cross-referenced this on Jun 1, 2023 from issue Use `__shiftright128` intrinsic in `secp256k1_u128_rshift` on MSVC by hebasto
5. real-or-random closed this on Jun 24, 2023

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performance