172 lines
6.4 KiB
C
172 lines
6.4 KiB
C
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/* $NetBSD: lbn80386.h,v 1.1.1.1 2001/01/27 08:08:30 itojun Exp $ */
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/*
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* Cylink Corporation <EFBFBD> 1998
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*
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* This software is licensed by Cylink to the Internet Software Consortium to
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* promote implementation of royalty free public key cryptography within IETF
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* standards. Cylink wishes to expressly thank the contributions of Dr.
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* Martin Hellman, Whitfield Diffie, Ralph Merkle and Stanford University for
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* their contributions to Internet Security. In accordance with the terms of
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* this license, ISC is authorized to distribute and sublicense this software
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* for the practice of IETF standards.
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*
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* The software includes BigNum, written by Colin Plumb and licensed by Philip
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* R. Zimmermann for royalty free use and distribution with Cylink's
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* software. Use of BigNum as a stand alone product or component is
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* specifically prohibited.
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*
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* Disclaimer of All Warranties. THIS SOFTWARE IS BEING PROVIDED "AS IS",
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* WITHOUT ANY EXPRESSED OR IMPLIED WARRANTY OF ANY KIND WHATSOEVER. IN
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* PARTICULAR, WITHOUT LIMITATION ON THE GENERALITY OF THE FOREGOING, CYLINK
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* MAKES NO REPRESENTATION OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*
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* Cylink or its representatives shall not be liable for tort, indirect,
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* special or consequential damages such as loss of profits or loss of
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* goodwill from the use or inability to use the software for any purpose or
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* for any reason whatsoever.
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*
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* EXPORT LAW: Export of the Foundations Suite may be subject to compliance
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* with the rules and regulations promulgated from time to time by the Bureau
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* of Export Administration, United States Department of Commerce, which
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* restrict the export and re-export of certain products and technical data.
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* If the export of the Foundations Suite is controlled under such rules and
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* regulations, then the Foundations Suite shall not be exported or
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* re-exported, directly or indirectly, (a) without all export or re-export
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* licenses and governmental approvals required by any applicable laws, or (b)
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* in violation of any applicable prohibition against the export or re-export
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* of any part of the Foundations Suite. All export licenses for software
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* containing the Foundations Suite are the sole responsibility of the licensee.
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*/
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/*
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* lbn80386.h - This file defines the interfaces to the 80386
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* assembly primitives. It is intended to be included in "lbn.h"
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* via the "#include BNINCLUDE" mechanism.
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*/
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#define BN_LITTLE_ENDIAN 1
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typedef unsigned long bnword32;
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#define BNWORD32 bnword32
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/* MS-DOS needs the calling convention described to it. */
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#ifndef MSDOS
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#ifdef __MSDOS__
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#define MSDOS 1
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#endif
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#endif
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#ifdef MSDOS
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#define CDECL __cdecl
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#else
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#define CDECL /*nothing*/
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#endif
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#ifdef __cplusplus
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/* These assembly-language primitives use C names */
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extern "C" {
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#endif
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/* Function prototypes for the asm routines */
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void CDECL
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lbnMulN1_32(bnword32 *out, bnword32 const *in, unsigned len, bnword32 k);
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#define lbnMulN1_32 lbnMulN1_32
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bnword32 CDECL
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lbnMulAdd1_32(bnword32 *out, bnword32 const *in, unsigned len, bnword32 k);
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#define lbnMulAdd1_32 lbnMulAdd1_32
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bnword32 CDECL
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lbnMulSub1_32(bnword32 *out, bnword32 const *in, unsigned len, bnword32 k);
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#define lbnMulSub1_32 lbnMulSub1_32
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bnword32 CDECL
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lbnDiv21_32(bnword32 *q, bnword32 nh, bnword32 nl, bnword32 d);
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#define lbnDiv21_32 lbnDiv21_32
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unsigned CDECL
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lbnModQ_32(bnword32 const *n, unsigned len, bnword32 d);
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#define lbnModQ_32 lbnModQ_32
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#ifdef __cplusplus
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}
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#endif
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#if __GNUC__
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/*
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* Use the (massively cool) GNU inline-assembler extension to define
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* inline expansions for various operations.
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*
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* The massively cool part is that the assembler can have inputs
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* and outputs, and you specify the operands and which effective
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* addresses are legal and they get substituted into the code.
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* (For example, some of the code requires a zero. Rather than
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* specify an immediate constant, the expansion specifies an operand
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* of zero which can be in various places. This lets GCC use an
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* immediate zero, or a register which contains zero if it's available.)
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*
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* The syntax is asm("asm_code" : outputs : inputs : trashed)
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* %0, %1 and so on in the asm code are substituted by the operands
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* in left-to-right order (outputs, then inputs).
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* The operands contain constraint strings and values to use.
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* Outputs must be lvalues, inputs may be rvalues. In the constraints:
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* "a" means that the operand must be in eax.
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* "d" means that the operand must be in edx.
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* "g" means that the operand may be any effective address.
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* "=" means that the operand is assigned to.
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* "%" means that this operand and the following one may be
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* interchanged if desirable.
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* "bcDSmn" means that the operand must be in ebx, ecx, esi, edi, memory,
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* or an immediate constant. (This is almost the same as "g"
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* but allowing it in eax wouldn't help because x is already
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* assigned there, and it must not be in edx, since edx is
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* overwritten by the multiply before a and b are read.)
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*
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* Note that GCC uses AT&T assembler syntax, which is rather
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* different from Intel syntax. The length (b, w or l) of the
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* operation is appended to the opcode, and the *second* operand
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* is the destination, not the first. Finally, the register names
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* are all preceded with "%". (Doubled here because % is a
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* magic character.)
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*/
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/* (ph<<32) + pl = x*y */
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#define mul32_ppmm(ph,pl,x,y) \
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__asm__("mull %3" : "=d"(ph), "=a"(pl) : "%a"(x), "g"(y))
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/* (ph<<32) + pl = x*y + a */
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#define mul32_ppmma(ph,pl,x,y,a) \
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__asm__("mull %3\n\t" \
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"addl %4,%%eax\n\t" \
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"adcl %5,%%edx" \
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: "=&d"(ph), "=a"(pl) \
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: "%a"(x), "g"(y), "bcDSmn"(a), "bcDSmn"(0))
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/* (ph<<32) + pl = x*y + a + b */
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#define mul32_ppmmaa(ph,pl,x,y,a,b) \
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__asm__("mull %3\n\t" \
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"addl %4,%%eax\n\t" \
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"adcl %6,%%edx\n\t" \
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"addl %5,%%eax\n\t" \
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"adcl %6,%%edx" \
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: "=&d"(ph), "=a"(pl) \
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: "%a"(x), "g"(y), "%bcDSmn"(a), "bcDSmn"(b), "bcDSmn"(0))
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/* q = ((nh<<32) + nl) / d, return remainder. nh guaranteed < d. */
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#undef lbnDiv21_32
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#define lbnDiv21_32(q,nh,nl,d) \
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({unsigned _; \
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__asm__("divl %4" : "=d"(_), "=a"(*q) : "d"(nh), "a"(nl), "g"(d)); \
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_;})
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/* No quotient, just return remainder ((nh<<32) + nl) % d */
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#define lbnMod21_32(nh,nl,d) \
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({unsigned _; \
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__asm__("divl %3" : "=d"(_) : "d"(nh), "a"(nl), "g"(d) : "ax"); \
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_;})
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#endif /* __GNUC__ */
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