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24 lines
975 B
24 lines
975 B
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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