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