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d440f13db0crypto: Guard code with `ENABLE_SSE41` macro (Hennadii Stepanov)6ec1ca7c85build: Fix test for SSE4.1 intrinsics (Hennadii Stepanov) Pull request description: 1. Fix the test for SSE4.1 intrinsics during build system configuration, which currently can be false positive, for example, when `CXXFLAGS="-mno-sse4.1"` provided. This PR fixes the test by adding the `_mm_blend_epi16` SSE4.1 function used in our codebase. 2. Guard `sha_x86_shani.cpp` code with `ENABLE_SSE41` macro as it uses the `_mm_blend_epi16` function from the SSE4.1 instruction set. It is possible that SHA-NI is enabled even when SSE4.1 is disabled, which causes compile errors in the master branch. Closes https://github.com/bitcoin/bitcoin/issues/28864. ACKs for top commit: sipa: utACKd440f13db0willcl-ark: tACKd440f13db0theuni: utACKd440f13db0Tree-SHA512: a6e1e8c94e1b94874ff51846815ef445e6135cbdb01b08eb695b3548115f2340dd835ebe53673ae46a553fe6be4815e68d8642c34235dd7af5106c4b7c9ea6f3