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13 lines
595 B
13 lines
595 B
2 years ago
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diff --git a/crypto/bn/rsa_sup_mul.c b/crypto/bn/rsa_sup_mul.c
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--- a/crypto/bn/rsa_sup_mul.c
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+++ b/crypto/bn/rsa_sup_mul.c
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@@ -109,7 +109,7 @@ static ossl_inline void _mul_limb(limb_t *hi, limb_t *lo, limb_t a, limb_t b)
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*hi = t >> LIMB_BIT_SIZE;
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*lo = (limb_t)t;
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}
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-#elif (BN_BYTES == 8) && (defined _MSC_VER)
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+#elif (BN_BYTES == 8) && (defined _MSC_VER) && (defined(_M_AMD64) || defined(_M_X64))
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/* https://learn.microsoft.com/en-us/cpp/intrinsics/umul128?view=msvc-170 */
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#pragma intrinsic(_umul128)
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static ossl_inline void _mul_limb(limb_t *hi, limb_t *lo, limb_t a, limb_t b)
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