256 lines
8.4 KiB
ArmAsm
256 lines
8.4 KiB
ArmAsm
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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// SHA256 block routine. See sha256block.go for Go equivalent.
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//
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// The algorithm is detailed in FIPS 180-4:
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//
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// http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
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//
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// Wt = Mt; for 0 <= t <= 15
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// Wt = SIGMA1(Wt-2) + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
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//
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// a = H0
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// b = H1
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// c = H2
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// d = H3
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// e = H4
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// f = H5
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// g = H6
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// h = H7
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//
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// for t = 0 to 63 {
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// T1 = h + BIGSIGMA1(e) + Ch(e,f,g) + Kt + Wt
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// T2 = BIGSIGMA0(a) + Maj(a,b,c)
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// h = g
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// g = f
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// f = e
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// e = d + T1
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// d = c
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// c = b
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// b = a
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// a = T1 + T2
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// }
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//
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// H0 = a + H0
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// H1 = b + H1
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// H2 = c + H2
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// H3 = d + H3
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// H4 = e + H4
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// H5 = f + H5
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// H6 = g + H6
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// H7 = h + H7
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// Wt = Mt; for 0 <= t <= 15
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#define MSGSCHEDULE0(index) \
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MOVL (index*4)(SI), AX; \
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BSWAPL AX; \
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MOVL AX, (index*4)(BP)
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// Wt = SIGMA1(Wt-2) + Wt-7 + SIGMA0(Wt-15) + Wt-16; for 16 <= t <= 63
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// SIGMA0(x) = ROTR(7,x) XOR ROTR(18,x) XOR SHR(3,x)
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// SIGMA1(x) = ROTR(17,x) XOR ROTR(19,x) XOR SHR(10,x)
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#define MSGSCHEDULE1(index) \
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MOVL ((index-2)*4)(BP), AX; \
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MOVL AX, CX; \
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RORL $17, AX; \
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MOVL CX, DX; \
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RORL $19, CX; \
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SHRL $10, DX; \
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MOVL ((index-15)*4)(BP), BX; \
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XORL CX, AX; \
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MOVL BX, CX; \
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XORL DX, AX; \
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RORL $7, BX; \
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MOVL CX, DX; \
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SHRL $3, DX; \
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RORL $18, CX; \
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ADDL ((index-7)*4)(BP), AX; \
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XORL CX, BX; \
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XORL DX, BX; \
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ADDL ((index-16)*4)(BP), BX; \
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ADDL BX, AX; \
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MOVL AX, ((index)*4)(BP)
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// Calculate T1 in AX - uses AX, CX and DX registers.
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// h is also used as an accumulator. Wt is passed in AX.
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// T1 = h + BIGSIGMA1(e) + Ch(e, f, g) + Kt + Wt
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// BIGSIGMA1(x) = ROTR(6,x) XOR ROTR(11,x) XOR ROTR(25,x)
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// Ch(x, y, z) = (x AND y) XOR (NOT x AND z)
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#define SHA256T1(const, e, f, g, h) \
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ADDL AX, h; \
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MOVL e, AX; \
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ADDL $const, h; \
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MOVL e, CX; \
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RORL $6, AX; \
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MOVL e, DX; \
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RORL $11, CX; \
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XORL CX, AX; \
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MOVL e, CX; \
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RORL $25, DX; \
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ANDL f, CX; \
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XORL AX, DX; \
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MOVL e, AX; \
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NOTL AX; \
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ADDL DX, h; \
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ANDL g, AX; \
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XORL CX, AX; \
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ADDL h, AX
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// Calculate T2 in BX - uses BX, CX, DX and DI registers.
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// T2 = BIGSIGMA0(a) + Maj(a, b, c)
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// BIGSIGMA0(x) = ROTR(2,x) XOR ROTR(13,x) XOR ROTR(22,x)
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// Maj(x, y, z) = (x AND y) XOR (x AND z) XOR (y AND z)
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#define SHA256T2(a, b, c) \
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MOVL a, DI; \
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MOVL c, BX; \
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RORL $2, DI; \
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MOVL a, DX; \
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ANDL b, BX; \
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RORL $13, DX; \
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MOVL a, CX; \
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ANDL c, CX; \
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XORL DX, DI; \
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XORL CX, BX; \
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MOVL a, DX; \
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MOVL b, CX; \
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RORL $22, DX; \
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ANDL a, CX; \
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XORL CX, BX; \
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XORL DX, DI; \
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ADDL DI, BX
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// Calculate T1 and T2, then e = d + T1 and a = T1 + T2.
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// The values for e and a are stored in d and h, ready for rotation.
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#define SHA256ROUND(index, const, a, b, c, d, e, f, g, h) \
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SHA256T1(const, e, f, g, h); \
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SHA256T2(a, b, c); \
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MOVL BX, h; \
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ADDL AX, d; \
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ADDL AX, h
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#define SHA256ROUND0(index, const, a, b, c, d, e, f, g, h) \
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MSGSCHEDULE0(index); \
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SHA256ROUND(index, const, a, b, c, d, e, f, g, h)
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#define SHA256ROUND1(index, const, a, b, c, d, e, f, g, h) \
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MSGSCHEDULE1(index); \
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SHA256ROUND(index, const, a, b, c, d, e, f, g, h)
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TEXT ·block(SB),0,$264-32
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MOVQ p_base+8(FP), SI
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MOVQ p_len+16(FP), DX
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SHRQ $6, DX
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SHLQ $6, DX
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LEAQ (SI)(DX*1), DI
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MOVQ DI, 256(SP)
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CMPQ SI, DI
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JEQ end
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MOVQ dig+0(FP), BP
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MOVL (0*4)(BP), R8 // a = H0
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MOVL (1*4)(BP), R9 // b = H1
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MOVL (2*4)(BP), R10 // c = H2
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MOVL (3*4)(BP), R11 // d = H3
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MOVL (4*4)(BP), R12 // e = H4
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MOVL (5*4)(BP), R13 // f = H5
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MOVL (6*4)(BP), R14 // g = H6
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MOVL (7*4)(BP), R15 // h = H7
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loop:
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MOVQ SP, BP // message schedule
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SHA256ROUND0(0, 0x428a2f98, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND0(1, 0x71374491, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND0(2, 0xb5c0fbcf, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND0(3, 0xe9b5dba5, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND0(4, 0x3956c25b, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND0(5, 0x59f111f1, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND0(6, 0x923f82a4, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND0(7, 0xab1c5ed5, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND0(8, 0xd807aa98, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND0(9, 0x12835b01, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND0(10, 0x243185be, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND0(11, 0x550c7dc3, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND0(12, 0x72be5d74, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND0(13, 0x80deb1fe, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND0(14, 0x9bdc06a7, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND0(15, 0xc19bf174, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(16, 0xe49b69c1, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(17, 0xefbe4786, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(18, 0x0fc19dc6, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(19, 0x240ca1cc, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(20, 0x2de92c6f, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(21, 0x4a7484aa, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(22, 0x5cb0a9dc, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(23, 0x76f988da, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(24, 0x983e5152, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(25, 0xa831c66d, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(26, 0xb00327c8, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(27, 0xbf597fc7, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(28, 0xc6e00bf3, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(29, 0xd5a79147, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(30, 0x06ca6351, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(31, 0x14292967, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(32, 0x27b70a85, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(33, 0x2e1b2138, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(34, 0x4d2c6dfc, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(35, 0x53380d13, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(36, 0x650a7354, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(37, 0x766a0abb, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(38, 0x81c2c92e, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(39, 0x92722c85, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(40, 0xa2bfe8a1, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(41, 0xa81a664b, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(42, 0xc24b8b70, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(43, 0xc76c51a3, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(44, 0xd192e819, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(45, 0xd6990624, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(46, 0xf40e3585, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(47, 0x106aa070, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(48, 0x19a4c116, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(49, 0x1e376c08, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(50, 0x2748774c, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(51, 0x34b0bcb5, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(52, 0x391c0cb3, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(53, 0x4ed8aa4a, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(54, 0x5b9cca4f, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(55, 0x682e6ff3, R9, R10, R11, R12, R13, R14, R15, R8)
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SHA256ROUND1(56, 0x748f82ee, R8, R9, R10, R11, R12, R13, R14, R15)
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SHA256ROUND1(57, 0x78a5636f, R15, R8, R9, R10, R11, R12, R13, R14)
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SHA256ROUND1(58, 0x84c87814, R14, R15, R8, R9, R10, R11, R12, R13)
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SHA256ROUND1(59, 0x8cc70208, R13, R14, R15, R8, R9, R10, R11, R12)
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SHA256ROUND1(60, 0x90befffa, R12, R13, R14, R15, R8, R9, R10, R11)
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SHA256ROUND1(61, 0xa4506ceb, R11, R12, R13, R14, R15, R8, R9, R10)
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SHA256ROUND1(62, 0xbef9a3f7, R10, R11, R12, R13, R14, R15, R8, R9)
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SHA256ROUND1(63, 0xc67178f2, R9, R10, R11, R12, R13, R14, R15, R8)
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MOVQ dig+0(FP), BP
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ADDL (0*4)(BP), R8 // H0 = a + H0
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MOVL R8, (0*4)(BP)
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ADDL (1*4)(BP), R9 // H1 = b + H1
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MOVL R9, (1*4)(BP)
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ADDL (2*4)(BP), R10 // H2 = c + H2
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MOVL R10, (2*4)(BP)
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ADDL (3*4)(BP), R11 // H3 = d + H3
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MOVL R11, (3*4)(BP)
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ADDL (4*4)(BP), R12 // H4 = e + H4
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MOVL R12, (4*4)(BP)
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ADDL (5*4)(BP), R13 // H5 = f + H5
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MOVL R13, (5*4)(BP)
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ADDL (6*4)(BP), R14 // H6 = g + H6
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MOVL R14, (6*4)(BP)
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ADDL (7*4)(BP), R15 // H7 = h + H7
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MOVL R15, (7*4)(BP)
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ADDQ $64, SI
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CMPQ SI, 256(SP)
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JB loop
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end:
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RET
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