check in v3.8.1 source

crypto/bn/arch/i386/bn_arch.h

@@ -0,0 +1,86 @@
+/*	$OpenBSD: bn_arch.h,v 1.9 2023/02/16 10:41:03 jsing Exp $ */
+/*
+ * Copyright (c) 2023 Joel Sing <jsing@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <openssl/bn.h>
+
+#ifndef HEADER_BN_ARCH_H
+#define HEADER_BN_ARCH_H
+
+#ifndef OPENSSL_NO_ASM
+
+#define HAVE_BN_ADD_WORDS
+
+#define HAVE_BN_DIV_WORDS
+
+#define HAVE_BN_MUL_ADD_WORDS
+#define HAVE_BN_MUL_COMBA4
+#define HAVE_BN_MUL_COMBA8
+#define HAVE_BN_MUL_WORDS
+
+#define HAVE_BN_SQR_COMBA4
+#define HAVE_BN_SQR_COMBA8
+#define HAVE_BN_SQR_WORDS
+
+#define HAVE_BN_SUB_WORDS
+
+#if defined(__GNUC__)
+#define HAVE_BN_DIV_REM_WORDS_INLINE
+
+static inline void
+bn_div_rem_words_inline(BN_ULONG h, BN_ULONG l, BN_ULONG d, BN_ULONG *out_q,
+    BN_ULONG *out_r)
+{
+	BN_ULONG q, r;
+
+	/*
+	 * Unsigned division of %edx:%eax by d with quotient being stored in
+	 * %eax and remainder in %edx.
+	 */
+	__asm__ volatile ("divl %4"
+	    : "=a"(q), "=d"(r)
+	    : "a"(l), "d"(h), "rm"(d)
+	    : "cc");
+
+	*out_q = q;
+	*out_r = r;
+}
+#endif /* __GNUC__ */
+
+#if defined(__GNUC__)
+#define HAVE_BN_MULW
+
+static inline void
+bn_mulw(BN_ULONG a, BN_ULONG b, BN_ULONG *out_r1, BN_ULONG *out_r0)
+{
+	BN_ULONG r1, r0;
+
+	/*
+	 * Unsigned multiplication of %eax, with the double word result being
+	 * stored in %edx:%eax.
+	 */
+	__asm__ ("mull %3"
+	    : "=d"(r1), "=a"(r0)
+	    : "a"(a), "rm"(b)
+	    : "cc");
+
+	*out_r1 = r1;
+	*out_r0 = r0;
+}
+#endif /* __GNUC__ */
+
+#endif
+#endif