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25 lines
975 B
25 lines
975 B
7 months ago
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diff --git a/src/catch2/internal/catch_random_integer_helpers.hpp b/src/catch2/internal/catch_random_integer_helpers.hpp
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index 10d82559..cb5e004f 100644
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--- a/src/catch2/internal/catch_random_integer_helpers.hpp
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+++ b/src/catch2/internal/catch_random_integer_helpers.hpp
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@@ -21,7 +21,10 @@
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// it, and it provides an escape hatch to the users who need it.
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#if defined( __SIZEOF_INT128__ )
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# define CATCH_CONFIG_INTERNAL_UINT128
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-#elif defined( _MSC_VER ) && ( defined( _WIN64 ) || defined( _M_ARM64 ) )
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+// Unlike GCC, MSVC does not polyfill umul as mulh + mul pair on ARM machines.
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+// Currently we do not bother doing this ourselves, but we could if it became
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+// important for perf.
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+#elif defined( _MSC_VER ) && defined( _M_X64 )
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# define CATCH_CONFIG_INTERNAL_MSVC_UMUL128
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#endif
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@@ -36,7 +39,6 @@
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!defined( CATCH_CONFIG_MSVC_UMUL128 )
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# define CATCH_CONFIG_MSVC_UMUL128
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# include <intrin.h>
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-# pragma intrinsic( _umul128 )
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#endif
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