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Diffstat (limited to 'src/crypto/sha1/sha1block_386.s')
| -rw-r--r-- | src/crypto/sha1/sha1block_386.s | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/crypto/sha1/sha1block_386.s b/src/crypto/sha1/sha1block_386.s new file mode 100644 index 0000000..34d023d --- /dev/null +++ b/src/crypto/sha1/sha1block_386.s @@ -0,0 +1,233 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include "textflag.h" + +// SHA-1 block routine. See sha1block.go for Go equivalent. +// +// There are 80 rounds of 4 types: +// - rounds 0-15 are type 1 and load data (ROUND1 macro). +// - rounds 16-19 are type 1 and do not load data (ROUND1x macro). +// - rounds 20-39 are type 2 and do not load data (ROUND2 macro). +// - rounds 40-59 are type 3 and do not load data (ROUND3 macro). +// - rounds 60-79 are type 4 and do not load data (ROUND4 macro). +// +// Each round loads or shuffles the data, then computes a per-round +// function of b, c, d, and then mixes the result into and rotates the +// five registers a, b, c, d, e holding the intermediate results. +// +// The register rotation is implemented by rotating the arguments to +// the round macros instead of by explicit move instructions. + +// Like sha1block_amd64.s, but we keep the data and limit pointers on the stack. +// To free up the word pointer (R10 on amd64, DI here), we add it to e during +// LOAD/SHUFFLE instead of during MIX. +// +// The stack holds the intermediate word array - 16 uint32s - at 0(SP) up to 64(SP). +// The saved a, b, c, d, e (R11 through R15 on amd64) are at 64(SP) up to 84(SP). +// The saved limit pointer (DI on amd64) is at 84(SP). +// The saved data pointer (SI on amd64) is at 88(SP). + +#define LOAD(index, e) \ + MOVL 88(SP), SI; \ + MOVL (index*4)(SI), DI; \ + BSWAPL DI; \ + MOVL DI, (index*4)(SP); \ + ADDL DI, e + +#define SHUFFLE(index, e) \ + MOVL (((index)&0xf)*4)(SP), DI; \ + XORL (((index-3)&0xf)*4)(SP), DI; \ + XORL (((index-8)&0xf)*4)(SP), DI; \ + XORL (((index-14)&0xf)*4)(SP), DI; \ + ROLL $1, DI; \ + MOVL DI, (((index)&0xf)*4)(SP); \ + ADDL DI, e + +#define FUNC1(a, b, c, d, e) \ + MOVL d, DI; \ + XORL c, DI; \ + ANDL b, DI; \ + XORL d, DI + +#define FUNC2(a, b, c, d, e) \ + MOVL b, DI; \ + XORL c, DI; \ + XORL d, DI + +#define FUNC3(a, b, c, d, e) \ + MOVL b, SI; \ + ORL c, SI; \ + ANDL d, SI; \ + MOVL b, DI; \ + ANDL c, DI; \ + ORL SI, DI + +#define FUNC4 FUNC2 + +#define MIX(a, b, c, d, e, const) \ + ROLL $30, b; \ + ADDL DI, e; \ + MOVL a, SI; \ + ROLL $5, SI; \ + LEAL const(e)(SI*1), e + +#define ROUND1(a, b, c, d, e, index) \ + LOAD(index, e); \ + FUNC1(a, b, c, d, e); \ + MIX(a, b, c, d, e, 0x5A827999) + +#define ROUND1x(a, b, c, d, e, index) \ + SHUFFLE(index, e); \ + FUNC1(a, b, c, d, e); \ + MIX(a, b, c, d, e, 0x5A827999) + +#define ROUND2(a, b, c, d, e, index) \ + SHUFFLE(index, e); \ + FUNC2(a, b, c, d, e); \ + MIX(a, b, c, d, e, 0x6ED9EBA1) + +#define ROUND3(a, b, c, d, e, index) \ + SHUFFLE(index, e); \ + FUNC3(a, b, c, d, e); \ + MIX(a, b, c, d, e, 0x8F1BBCDC) + +#define ROUND4(a, b, c, d, e, index) \ + SHUFFLE(index, e); \ + FUNC4(a, b, c, d, e); \ + MIX(a, b, c, d, e, 0xCA62C1D6) + +// func block(dig *digest, p []byte) +TEXT ·block(SB),NOSPLIT,$92-16 + MOVL dig+0(FP), BP + MOVL p+4(FP), SI + MOVL p_len+8(FP), DX + SHRL $6, DX + SHLL $6, DX + + LEAL (SI)(DX*1), DI + MOVL (0*4)(BP), AX + MOVL (1*4)(BP), BX + MOVL (2*4)(BP), CX + MOVL (3*4)(BP), DX + MOVL (4*4)(BP), BP + + CMPL SI, DI + JEQ end + + MOVL DI, 84(SP) + +loop: + MOVL SI, 88(SP) + + MOVL AX, 64(SP) + MOVL BX, 68(SP) + MOVL CX, 72(SP) + MOVL DX, 76(SP) + MOVL BP, 80(SP) + + ROUND1(AX, BX, CX, DX, BP, 0) + ROUND1(BP, AX, BX, CX, DX, 1) + ROUND1(DX, BP, AX, BX, CX, 2) + ROUND1(CX, DX, BP, AX, BX, 3) + ROUND1(BX, CX, DX, BP, AX, 4) + ROUND1(AX, BX, CX, DX, BP, 5) + ROUND1(BP, AX, BX, CX, DX, 6) + ROUND1(DX, BP, AX, BX, CX, 7) + ROUND1(CX, DX, BP, AX, BX, 8) + ROUND1(BX, CX, DX, BP, AX, 9) + ROUND1(AX, BX, CX, DX, BP, 10) + ROUND1(BP, AX, BX, CX, DX, 11) + ROUND1(DX, BP, AX, BX, CX, 12) + ROUND1(CX, DX, BP, AX, BX, 13) + ROUND1(BX, CX, DX, BP, AX, 14) + ROUND1(AX, BX, CX, DX, BP, 15) + + ROUND1x(BP, AX, BX, CX, DX, 16) + ROUND1x(DX, BP, AX, BX, CX, 17) + ROUND1x(CX, DX, BP, AX, BX, 18) + ROUND1x(BX, CX, DX, BP, AX, 19) + + ROUND2(AX, BX, CX, DX, BP, 20) + ROUND2(BP, AX, BX, CX, DX, 21) + ROUND2(DX, BP, AX, BX, CX, 22) + ROUND2(CX, DX, BP, AX, BX, 23) + ROUND2(BX, CX, DX, BP, AX, 24) + ROUND2(AX, BX, CX, DX, BP, 25) + ROUND2(BP, AX, BX, CX, DX, 26) + ROUND2(DX, BP, AX, BX, CX, 27) + ROUND2(CX, DX, BP, AX, BX, 28) + ROUND2(BX, CX, DX, BP, AX, 29) + ROUND2(AX, BX, CX, DX, BP, 30) + ROUND2(BP, AX, BX, CX, DX, 31) + ROUND2(DX, BP, AX, BX, CX, 32) + ROUND2(CX, DX, BP, AX, BX, 33) + ROUND2(BX, CX, DX, BP, AX, 34) + ROUND2(AX, BX, CX, DX, BP, 35) + ROUND2(BP, AX, BX, CX, DX, 36) + ROUND2(DX, BP, AX, BX, CX, 37) + ROUND2(CX, DX, BP, AX, BX, 38) + ROUND2(BX, CX, DX, BP, AX, 39) + + ROUND3(AX, BX, CX, DX, BP, 40) + ROUND3(BP, AX, BX, CX, DX, 41) + ROUND3(DX, BP, AX, BX, CX, 42) + ROUND3(CX, DX, BP, AX, BX, 43) + ROUND3(BX, CX, DX, BP, AX, 44) + ROUND3(AX, BX, CX, DX, BP, 45) + ROUND3(BP, AX, BX, CX, DX, 46) + ROUND3(DX, BP, AX, BX, CX, 47) + ROUND3(CX, DX, BP, AX, BX, 48) + ROUND3(BX, CX, DX, BP, AX, 49) + ROUND3(AX, BX, CX, DX, BP, 50) + ROUND3(BP, AX, BX, CX, DX, 51) + ROUND3(DX, BP, AX, BX, CX, 52) + ROUND3(CX, DX, BP, AX, BX, 53) + ROUND3(BX, CX, DX, BP, AX, 54) + ROUND3(AX, BX, CX, DX, BP, 55) + ROUND3(BP, AX, BX, CX, DX, 56) + ROUND3(DX, BP, AX, BX, CX, 57) + ROUND3(CX, DX, BP, AX, BX, 58) + ROUND3(BX, CX, DX, BP, AX, 59) + + ROUND4(AX, BX, CX, DX, BP, 60) + ROUND4(BP, AX, BX, CX, DX, 61) + ROUND4(DX, BP, AX, BX, CX, 62) + ROUND4(CX, DX, BP, AX, BX, 63) + ROUND4(BX, CX, DX, BP, AX, 64) + ROUND4(AX, BX, CX, DX, BP, 65) + ROUND4(BP, AX, BX, CX, DX, 66) + ROUND4(DX, BP, AX, BX, CX, 67) + ROUND4(CX, DX, BP, AX, BX, 68) + ROUND4(BX, CX, DX, BP, AX, 69) + ROUND4(AX, BX, CX, DX, BP, 70) + ROUND4(BP, AX, BX, CX, DX, 71) + ROUND4(DX, BP, AX, BX, CX, 72) + ROUND4(CX, DX, BP, AX, BX, 73) + ROUND4(BX, CX, DX, BP, AX, 74) + ROUND4(AX, BX, CX, DX, BP, 75) + ROUND4(BP, AX, BX, CX, DX, 76) + ROUND4(DX, BP, AX, BX, CX, 77) + ROUND4(CX, DX, BP, AX, BX, 78) + ROUND4(BX, CX, DX, BP, AX, 79) + + ADDL 64(SP), AX + ADDL 68(SP), BX + ADDL 72(SP), CX + ADDL 76(SP), DX + ADDL 80(SP), BP + + MOVL 88(SP), SI + ADDL $64, SI + CMPL SI, 84(SP) + JB loop + +end: + MOVL dig+0(FP), DI + MOVL AX, (0*4)(DI) + MOVL BX, (1*4)(DI) + MOVL CX, (2*4)(DI) + MOVL DX, (3*4)(DI) + MOVL BP, (4*4)(DI) + RET |