md5block_386.s

Documentation: crypto/md5

     1// Original source:
     2//	http://www.zorinaq.com/papers/md5-amd64.html
     3//	http://www.zorinaq.com/papers/md5-amd64.tar.bz2
     4//
     5// Translated from Perl generating GNU assembly into
     6// #defines generating 8a assembly, and adjusted for 386,
     7// by the Go Authors.
     8
     9#include "textflag.h"
    10
    11// MD5 optimized for AMD64.
    12//
    13// Author: Marc Bevand <bevand_m (at) epita.fr>
    14// Licence: I hereby disclaim the copyright on this code and place it
    15// in the public domain.
    16
    17#define ROUND1(a, b, c, d, index, const, shift) \
    18	XORL	c, BP; \
    19	LEAL	const(a)(DI*1), a; \
    20	ANDL	b, BP; \
    21	XORL d, BP; \
    22	MOVL (index*4)(SI), DI; \
    23	ADDL BP, a; \
    24	ROLL $shift, a; \
    25	MOVL c, BP; \
    26	ADDL b, a
    27
    28#define ROUND2(a, b, c, d, index, const, shift) \
    29	LEAL	const(a)(DI*1),a; \
    30	MOVL	d,		DI; \
    31	ANDL	b,		DI; \
    32	MOVL	d,		BP; \
    33	NOTL	BP; \
    34	ANDL	c,		BP; \
    35	ORL	DI,		BP; \
    36	MOVL	(index*4)(SI),DI; \
    37	ADDL	BP,		a; \
    38	ROLL	$shift,	a; \
    39	ADDL	b,		a
    40
    41#define ROUND3(a, b, c, d, index, const, shift) \
    42	LEAL	const(a)(DI*1),a; \
    43	MOVL	(index*4)(SI),DI; \
    44	XORL	d,		BP; \
    45	XORL	b,		BP; \
    46	ADDL	BP,		a; \
    47	ROLL	$shift,		a; \
    48	MOVL	b,		BP; \
    49	ADDL	b,		a
    50
    51#define ROUND4(a, b, c, d, index, const, shift) \
    52	LEAL	const(a)(DI*1),a; \
    53	ORL	b,		BP; \
    54	XORL	c,		BP; \
    55	ADDL	BP,		a; \
    56	MOVL	(index*4)(SI),DI; \
    57	MOVL	$0xffffffff,	BP; \
    58	ROLL	$shift,		a; \
    59	XORL	c,		BP; \
    60	ADDL	b,		a
    61
    62TEXT	·block(SB),NOSPLIT,$24-16
    63	MOVL	dig+0(FP),	BP
    64	MOVL	p+4(FP),	SI
    65	MOVL	p_len+8(FP), DX
    66	SHRL	$6,		DX
    67	SHLL	$6,		DX
    68
    69	LEAL	(SI)(DX*1),	DI
    70	MOVL	(0*4)(BP),	AX
    71	MOVL	(1*4)(BP),	BX
    72	MOVL	(2*4)(BP),	CX
    73	MOVL	(3*4)(BP),	DX
    74
    75	CMPL	SI,		DI
    76	JEQ	end
    77
    78	MOVL	DI,		16(SP)
    79
    80loop:
    81	MOVL	AX,		0(SP)
    82	MOVL	BX,		4(SP)
    83	MOVL	CX,		8(SP)
    84	MOVL	DX,		12(SP)
    85
    86	MOVL	(0*4)(SI),	DI
    87	MOVL	DX,		BP
    88
    89	ROUND1(AX,BX,CX,DX, 1,0xd76aa478, 7);
    90	ROUND1(DX,AX,BX,CX, 2,0xe8c7b756,12);
    91	ROUND1(CX,DX,AX,BX, 3,0x242070db,17);
    92	ROUND1(BX,CX,DX,AX, 4,0xc1bdceee,22);
    93	ROUND1(AX,BX,CX,DX, 5,0xf57c0faf, 7);
    94	ROUND1(DX,AX,BX,CX, 6,0x4787c62a,12);
    95	ROUND1(CX,DX,AX,BX, 7,0xa8304613,17);
    96	ROUND1(BX,CX,DX,AX, 8,0xfd469501,22);
    97	ROUND1(AX,BX,CX,DX, 9,0x698098d8, 7);
    98	ROUND1(DX,AX,BX,CX,10,0x8b44f7af,12);
    99	ROUND1(CX,DX,AX,BX,11,0xffff5bb1,17);
   100	ROUND1(BX,CX,DX,AX,12,0x895cd7be,22);
   101	ROUND1(AX,BX,CX,DX,13,0x6b901122, 7);
   102	ROUND1(DX,AX,BX,CX,14,0xfd987193,12);
   103	ROUND1(CX,DX,AX,BX,15,0xa679438e,17);
   104	ROUND1(BX,CX,DX,AX, 0,0x49b40821,22);
   105
   106	MOVL	(1*4)(SI),	DI
   107	MOVL	DX,		BP
   108
   109	ROUND2(AX,BX,CX,DX, 6,0xf61e2562, 5);
   110	ROUND2(DX,AX,BX,CX,11,0xc040b340, 9);
   111	ROUND2(CX,DX,AX,BX, 0,0x265e5a51,14);
   112	ROUND2(BX,CX,DX,AX, 5,0xe9b6c7aa,20);
   113	ROUND2(AX,BX,CX,DX,10,0xd62f105d, 5);
   114	ROUND2(DX,AX,BX,CX,15, 0x2441453, 9);
   115	ROUND2(CX,DX,AX,BX, 4,0xd8a1e681,14);
   116	ROUND2(BX,CX,DX,AX, 9,0xe7d3fbc8,20);
   117	ROUND2(AX,BX,CX,DX,14,0x21e1cde6, 5);
   118	ROUND2(DX,AX,BX,CX, 3,0xc33707d6, 9);
   119	ROUND2(CX,DX,AX,BX, 8,0xf4d50d87,14);
   120	ROUND2(BX,CX,DX,AX,13,0x455a14ed,20);
   121	ROUND2(AX,BX,CX,DX, 2,0xa9e3e905, 5);
   122	ROUND2(DX,AX,BX,CX, 7,0xfcefa3f8, 9);
   123	ROUND2(CX,DX,AX,BX,12,0x676f02d9,14);
   124	ROUND2(BX,CX,DX,AX, 0,0x8d2a4c8a,20);
   125
   126	MOVL	(5*4)(SI),	DI
   127	MOVL	CX,		BP
   128
   129	ROUND3(AX,BX,CX,DX, 8,0xfffa3942, 4);
   130	ROUND3(DX,AX,BX,CX,11,0x8771f681,11);
   131	ROUND3(CX,DX,AX,BX,14,0x6d9d6122,16);
   132	ROUND3(BX,CX,DX,AX, 1,0xfde5380c,23);
   133	ROUND3(AX,BX,CX,DX, 4,0xa4beea44, 4);
   134	ROUND3(DX,AX,BX,CX, 7,0x4bdecfa9,11);
   135	ROUND3(CX,DX,AX,BX,10,0xf6bb4b60,16);
   136	ROUND3(BX,CX,DX,AX,13,0xbebfbc70,23);
   137	ROUND3(AX,BX,CX,DX, 0,0x289b7ec6, 4);
   138	ROUND3(DX,AX,BX,CX, 3,0xeaa127fa,11);
   139	ROUND3(CX,DX,AX,BX, 6,0xd4ef3085,16);
   140	ROUND3(BX,CX,DX,AX, 9, 0x4881d05,23);
   141	ROUND3(AX,BX,CX,DX,12,0xd9d4d039, 4);
   142	ROUND3(DX,AX,BX,CX,15,0xe6db99e5,11);
   143	ROUND3(CX,DX,AX,BX, 2,0x1fa27cf8,16);
   144	ROUND3(BX,CX,DX,AX, 0,0xc4ac5665,23);
   145
   146	MOVL	(0*4)(SI),	DI
   147	MOVL	$0xffffffff,	BP
   148	XORL	DX,		BP
   149
   150	ROUND4(AX,BX,CX,DX, 7,0xf4292244, 6);
   151	ROUND4(DX,AX,BX,CX,14,0x432aff97,10);
   152	ROUND4(CX,DX,AX,BX, 5,0xab9423a7,15);
   153	ROUND4(BX,CX,DX,AX,12,0xfc93a039,21);
   154	ROUND4(AX,BX,CX,DX, 3,0x655b59c3, 6);
   155	ROUND4(DX,AX,BX,CX,10,0x8f0ccc92,10);
   156	ROUND4(CX,DX,AX,BX, 1,0xffeff47d,15);
   157	ROUND4(BX,CX,DX,AX, 8,0x85845dd1,21);
   158	ROUND4(AX,BX,CX,DX,15,0x6fa87e4f, 6);
   159	ROUND4(DX,AX,BX,CX, 6,0xfe2ce6e0,10);
   160	ROUND4(CX,DX,AX,BX,13,0xa3014314,15);
   161	ROUND4(BX,CX,DX,AX, 4,0x4e0811a1,21);
   162	ROUND4(AX,BX,CX,DX,11,0xf7537e82, 6);
   163	ROUND4(DX,AX,BX,CX, 2,0xbd3af235,10);
   164	ROUND4(CX,DX,AX,BX, 9,0x2ad7d2bb,15);
   165	ROUND4(BX,CX,DX,AX, 0,0xeb86d391,21);
   166
   167	ADDL	0(SP),	AX
   168	ADDL	4(SP),	BX
   169	ADDL	8(SP),	CX
   170	ADDL	12(SP),	DX
   171
   172	ADDL	$64,		SI
   173	CMPL	SI,		16(SP)
   174	JB	loop
   175
   176end:
   177	MOVL	dig+0(FP),	BP
   178	MOVL	AX,		(0*4)(BP)
   179	MOVL	BX,		(1*4)(BP)
   180	MOVL	CX,		(2*4)(BP)
   181	MOVL	DX,		(3*4)(BP)
   182	RET
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