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// Original source:
// http://www.zorinaq.com/papers/md5-amd64.html
// http://www.zorinaq.com/papers/md5-amd64.tar.bz2
//
// MD5 optimized for ppc64le using Go's assembler for
// ppc64le, based on md5block_amd64.s implementation by
// the Go authors.
//
// Author: Marc Bevand <bevand_m (at) epita.fr>
// Licence: I hereby disclaim the copyright on this code and place it
// in the public domain.
//go:build ppc64 || ppc64le
#include "textflag.h"
// ENDIAN_MOVE generates the appropriate
// 4 byte load for big or little endian.
// The 4 bytes at ptr+off is loaded into dst.
// The idx reg is only needed for big endian
// and is clobbered when used.
#ifdef GOARCH_ppc64le
#define ENDIAN_MOVE(off, ptr, dst, idx) \
MOVWZ off(ptr),dst
#else
#define ENDIAN_MOVE(off, ptr, dst, idx) \
MOVD $off,idx; \
MOVWBR (idx)(ptr), dst
#endif
#define M00 R18
#define M01 R19
#define M02 R20
#define M03 R24
#define M04 R25
#define M05 R26
#define M06 R27
#define M07 R28
#define M08 R29
#define M09 R21
#define M10 R11
#define M11 R8
#define M12 R7
#define M13 R12
#define M14 R23
#define M15 R10
#define ROUND1(a, b, c, d, index, const, shift) \
ADD $const, index, R9; \
ADD R9, a; \
AND b, c, R9; \
ANDN b, d, R31; \
OR R9, R31, R9; \
ADD R9, a; \
ROTLW $shift, a; \
ADD b, a;
#define ROUND2(a, b, c, d, index, const, shift) \
ADD $const, index, R9; \
ADD R9, a; \
AND b, d, R31; \
ANDN d, c, R9; \
OR R9, R31; \
ADD R31, a; \
ROTLW $shift, a; \
ADD b, a;
#define ROUND3(a, b, c, d, index, const, shift) \
ADD $const, index, R9; \
ADD R9, a; \
XOR d, c, R31; \
XOR b, R31; \
ADD R31, a; \
ROTLW $shift, a; \
ADD b, a;
#define ROUND4(a, b, c, d, index, const, shift) \
ADD $const, index, R9; \
ADD R9, a; \
ORN d, b, R31; \
XOR c, R31; \
ADD R31, a; \
ROTLW $shift, a; \
ADD b, a;
TEXT ·block(SB),NOSPLIT,$0-32
MOVD dig+0(FP), R10
MOVD p+8(FP), R6
MOVD p_len+16(FP), R5
// We assume p_len >= 64
SRD $6, R5
MOVD R5, CTR
MOVWZ 0(R10), R22
MOVWZ 4(R10), R3
MOVWZ 8(R10), R4
MOVWZ 12(R10), R5
loop:
MOVD R22, R14
MOVD R3, R15
MOVD R4, R16
MOVD R5, R17
ENDIAN_MOVE( 0,R6,M00,M15)
ENDIAN_MOVE( 4,R6,M01,M15)
ENDIAN_MOVE( 8,R6,M02,M15)
ENDIAN_MOVE(12,R6,M03,M15)
ROUND1(R22,R3,R4,R5,M00,0xd76aa478, 7);
ROUND1(R5,R22,R3,R4,M01,0xe8c7b756,12);
ROUND1(R4,R5,R22,R3,M02,0x242070db,17);
ROUND1(R3,R4,R5,R22,M03,0xc1bdceee,22);
ENDIAN_MOVE(16,R6,M04,M15)
ENDIAN_MOVE(20,R6,M05,M15)
ENDIAN_MOVE(24,R6,M06,M15)
ENDIAN_MOVE(28,R6,M07,M15)
ROUND1(R22,R3,R4,R5,M04,0xf57c0faf, 7);
ROUND1(R5,R22,R3,R4,M05,0x4787c62a,12);
ROUND1(R4,R5,R22,R3,M06,0xa8304613,17);
ROUND1(R3,R4,R5,R22,M07,0xfd469501,22);
ENDIAN_MOVE(32,R6,M08,M15)
ENDIAN_MOVE(36,R6,M09,M15)
ENDIAN_MOVE(40,R6,M10,M15)
ENDIAN_MOVE(44,R6,M11,M15)
ROUND1(R22,R3,R4,R5,M08,0x698098d8, 7);
ROUND1(R5,R22,R3,R4,M09,0x8b44f7af,12);
ROUND1(R4,R5,R22,R3,M10,0xffff5bb1,17);
ROUND1(R3,R4,R5,R22,M11,0x895cd7be,22);
ENDIAN_MOVE(48,R6,M12,M15)
ENDIAN_MOVE(52,R6,M13,M15)
ENDIAN_MOVE(56,R6,M14,M15)
ENDIAN_MOVE(60,R6,M15,M15)
ROUND1(R22,R3,R4,R5,M12,0x6b901122, 7);
ROUND1(R5,R22,R3,R4,M13,0xfd987193,12);
ROUND1(R4,R5,R22,R3,M14,0xa679438e,17);
ROUND1(R3,R4,R5,R22,M15,0x49b40821,22);
ROUND2(R22,R3,R4,R5,M01,0xf61e2562, 5);
ROUND2(R5,R22,R3,R4,M06,0xc040b340, 9);
ROUND2(R4,R5,R22,R3,M11,0x265e5a51,14);
ROUND2(R3,R4,R5,R22,M00,0xe9b6c7aa,20);
ROUND2(R22,R3,R4,R5,M05,0xd62f105d, 5);
ROUND2(R5,R22,R3,R4,M10, 0x2441453, 9);
ROUND2(R4,R5,R22,R3,M15,0xd8a1e681,14);
ROUND2(R3,R4,R5,R22,M04,0xe7d3fbc8,20);
ROUND2(R22,R3,R4,R5,M09,0x21e1cde6, 5);
ROUND2(R5,R22,R3,R4,M14,0xc33707d6, 9);
ROUND2(R4,R5,R22,R3,M03,0xf4d50d87,14);
ROUND2(R3,R4,R5,R22,M08,0x455a14ed,20);
ROUND2(R22,R3,R4,R5,M13,0xa9e3e905, 5);
ROUND2(R5,R22,R3,R4,M02,0xfcefa3f8, 9);
ROUND2(R4,R5,R22,R3,M07,0x676f02d9,14);
ROUND2(R3,R4,R5,R22,M12,0x8d2a4c8a,20);
ROUND3(R22,R3,R4,R5,M05,0xfffa3942, 4);
ROUND3(R5,R22,R3,R4,M08,0x8771f681,11);
ROUND3(R4,R5,R22,R3,M11,0x6d9d6122,16);
ROUND3(R3,R4,R5,R22,M14,0xfde5380c,23);
ROUND3(R22,R3,R4,R5,M01,0xa4beea44, 4);
ROUND3(R5,R22,R3,R4,M04,0x4bdecfa9,11);
ROUND3(R4,R5,R22,R3,M07,0xf6bb4b60,16);
ROUND3(R3,R4,R5,R22,M10,0xbebfbc70,23);
ROUND3(R22,R3,R4,R5,M13,0x289b7ec6, 4);
ROUND3(R5,R22,R3,R4,M00,0xeaa127fa,11);
ROUND3(R4,R5,R22,R3,M03,0xd4ef3085,16);
ROUND3(R3,R4,R5,R22,M06, 0x4881d05,23);
ROUND3(R22,R3,R4,R5,M09,0xd9d4d039, 4);
ROUND3(R5,R22,R3,R4,M12,0xe6db99e5,11);
ROUND3(R4,R5,R22,R3,M15,0x1fa27cf8,16);
ROUND3(R3,R4,R5,R22,M02,0xc4ac5665,23);
ROUND4(R22,R3,R4,R5,M00,0xf4292244, 6);
ROUND4(R5,R22,R3,R4,M07,0x432aff97,10);
ROUND4(R4,R5,R22,R3,M14,0xab9423a7,15);
ROUND4(R3,R4,R5,R22,M05,0xfc93a039,21);
ROUND4(R22,R3,R4,R5,M12,0x655b59c3, 6);
ROUND4(R5,R22,R3,R4,M03,0x8f0ccc92,10);
ROUND4(R4,R5,R22,R3,M10,0xffeff47d,15);
ROUND4(R3,R4,R5,R22,M01,0x85845dd1,21);
ROUND4(R22,R3,R4,R5,M08,0x6fa87e4f, 6);
ROUND4(R5,R22,R3,R4,M15,0xfe2ce6e0,10);
ROUND4(R4,R5,R22,R3,M06,0xa3014314,15);
ROUND4(R3,R4,R5,R22,M13,0x4e0811a1,21);
ROUND4(R22,R3,R4,R5,M04,0xf7537e82, 6);
ROUND4(R5,R22,R3,R4,M11,0xbd3af235,10);
ROUND4(R4,R5,R22,R3,M02,0x2ad7d2bb,15);
ROUND4(R3,R4,R5,R22,M09,0xeb86d391,21);
ADD R14, R22
ADD R15, R3
ADD R16, R4
ADD R17, R5
ADD $64, R6
BC 16, 0, loop // bdnz
end:
MOVD dig+0(FP), R10
MOVWZ R22, 0(R10)
MOVWZ R3, 4(R10)
MOVWZ R4, 8(R10)
MOVWZ R5, 12(R10)
RET
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