Text file src/crypto/sha256/sha256block_arm64.s

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "textflag.h"
     6  
     7  #define HASHUPDATE \
     8  	SHA256H	V9.S4, V3, V2 \
     9  	SHA256H2	V9.S4, V8, V3 \
    10  	VMOV	V2.B16, V8.B16
    11  
    12  // func sha256block(h []uint32, p []byte, k []uint32)
    13  TEXT ¬∑sha256block(SB),NOSPLIT,$0
    14  	MOVD	h_base+0(FP), R0                           // Hash value first address
    15  	MOVD	p_base+24(FP), R1                          // message first address
    16  	MOVD	k_base+48(FP), R2                          // k constants first address
    17  	MOVD	p_len+32(FP), R3                           // message length
    18  	VLD1	(R0), [V0.S4, V1.S4]                       // load h(a,b,c,d,e,f,g,h)
    19  	VLD1.P	64(R2), [V16.S4, V17.S4, V18.S4, V19.S4]
    20  	VLD1.P	64(R2), [V20.S4, V21.S4, V22.S4, V23.S4]
    21  	VLD1.P	64(R2), [V24.S4, V25.S4, V26.S4, V27.S4]
    22  	VLD1	(R2), [V28.S4, V29.S4, V30.S4, V31.S4]     //load 64*4bytes K constant(K0-K63)
    23  
    24  blockloop:
    25  
    26  	VLD1.P	16(R1), [V4.B16]                            // load 16bytes message
    27  	VLD1.P	16(R1), [V5.B16]                            // load 16bytes message
    28  	VLD1.P	16(R1), [V6.B16]                            // load 16bytes message
    29  	VLD1.P	16(R1), [V7.B16]                            // load 16bytes message
    30  	VMOV	V0.B16, V2.B16                              // backup: VO h(dcba)
    31  	VMOV	V1.B16, V3.B16                              // backup: V1 h(hgfe)
    32  	VMOV	V2.B16, V8.B16
    33  	VREV32	V4.B16, V4.B16                              // prepare for using message in Byte format
    34  	VREV32	V5.B16, V5.B16
    35  	VREV32	V6.B16, V6.B16
    36  	VREV32	V7.B16, V7.B16
    37  
    38  	VADD	V16.S4, V4.S4, V9.S4                        // V18(W0+K0...W3+K3)
    39  	SHA256SU0	V5.S4, V4.S4                        // V4: (su0(W1)+W0,...,su0(W4)+W3)
    40  	HASHUPDATE                                          // H4
    41  
    42  	VADD	V17.S4, V5.S4, V9.S4                        // V18(W4+K4...W7+K7)
    43  	SHA256SU0	V6.S4, V5.S4                        // V5: (su0(W5)+W4,...,su0(W8)+W7)
    44  	SHA256SU1	V7.S4, V6.S4, V4.S4                 // V4: W16-W19
    45  	HASHUPDATE                                          // H8
    46  
    47  	VADD	V18.S4, V6.S4, V9.S4                        // V18(W8+K8...W11+K11)
    48  	SHA256SU0	V7.S4, V6.S4                        // V6: (su0(W9)+W8,...,su0(W12)+W11)
    49  	SHA256SU1	V4.S4, V7.S4, V5.S4                 // V5: W20-W23
    50  	HASHUPDATE                                          // H12
    51  
    52  	VADD	V19.S4, V7.S4, V9.S4                        // V18(W12+K12...W15+K15)
    53  	SHA256SU0	V4.S4, V7.S4                        // V7: (su0(W13)+W12,...,su0(W16)+W15)
    54  	SHA256SU1	V5.S4, V4.S4, V6.S4                 // V6: W24-W27
    55  	HASHUPDATE                                          // H16
    56  
    57  	VADD	V20.S4, V4.S4, V9.S4                        // V18(W16+K16...W19+K19)
    58  	SHA256SU0	V5.S4, V4.S4                        // V4: (su0(W17)+W16,...,su0(W20)+W19)
    59  	SHA256SU1	V6.S4, V5.S4, V7.S4                 // V7: W28-W31
    60  	HASHUPDATE                                          // H20
    61  
    62  	VADD	V21.S4, V5.S4, V9.S4                        // V18(W20+K20...W23+K23)
    63  	SHA256SU0	V6.S4, V5.S4                        // V5: (su0(W21)+W20,...,su0(W24)+W23)
    64  	SHA256SU1	V7.S4, V6.S4, V4.S4                 // V4: W32-W35
    65  	HASHUPDATE                                          // H24
    66  
    67  	VADD	V22.S4, V6.S4, V9.S4                        // V18(W24+K24...W27+K27)
    68  	SHA256SU0	V7.S4, V6.S4                        // V6: (su0(W25)+W24,...,su0(W28)+W27)
    69  	SHA256SU1	V4.S4, V7.S4, V5.S4                 // V5: W36-W39
    70  	HASHUPDATE                                          // H28
    71  
    72  	VADD	V23.S4, V7.S4, V9.S4                        // V18(W28+K28...W31+K31)
    73  	SHA256SU0	V4.S4, V7.S4                        // V7: (su0(W29)+W28,...,su0(W32)+W31)
    74  	SHA256SU1	V5.S4, V4.S4, V6.S4                 // V6: W40-W43
    75  	HASHUPDATE                                          // H32
    76  
    77  	VADD	V24.S4, V4.S4, V9.S4                        // V18(W32+K32...W35+K35)
    78  	SHA256SU0	V5.S4, V4.S4                        // V4: (su0(W33)+W32,...,su0(W36)+W35)
    79  	SHA256SU1	V6.S4, V5.S4, V7.S4                 // V7: W44-W47
    80  	HASHUPDATE                                          // H36
    81  
    82  	VADD	V25.S4, V5.S4, V9.S4                        // V18(W36+K36...W39+K39)
    83  	SHA256SU0	V6.S4, V5.S4                        // V5: (su0(W37)+W36,...,su0(W40)+W39)
    84  	SHA256SU1	V7.S4, V6.S4, V4.S4                 // V4: W48-W51
    85  	HASHUPDATE                                          // H40
    86  
    87  	VADD	V26.S4, V6.S4, V9.S4                        // V18(W40+K40...W43+K43)
    88  	SHA256SU0	V7.S4, V6.S4                        // V6: (su0(W41)+W40,...,su0(W44)+W43)
    89  	SHA256SU1	V4.S4, V7.S4, V5.S4                 // V5: W52-W55
    90  	HASHUPDATE                                          // H44
    91  
    92  	VADD	V27.S4, V7.S4, V9.S4                        // V18(W44+K44...W47+K47)
    93  	SHA256SU0	V4.S4, V7.S4                        // V7: (su0(W45)+W44,...,su0(W48)+W47)
    94  	SHA256SU1	V5.S4, V4.S4, V6.S4                 // V6: W56-W59
    95  	HASHUPDATE                                          // H48
    96  
    97  	VADD	V28.S4, V4.S4, V9.S4                        // V18(W48+K48,...,W51+K51)
    98  	HASHUPDATE                                          // H52
    99  	SHA256SU1	V6.S4, V5.S4, V7.S4                 // V7: W60-W63
   100  
   101  	VADD	V29.S4, V5.S4, V9.S4                        // V18(W52+K52,...,W55+K55)
   102  	HASHUPDATE                                          // H56
   103  
   104  	VADD	V30.S4, V6.S4, V9.S4                        // V18(W59+K59,...,W59+K59)
   105  	HASHUPDATE                                          // H60
   106  
   107  	VADD	V31.S4, V7.S4, V9.S4                        // V18(W60+K60,...,W63+K63)
   108  	HASHUPDATE                                          // H64
   109  
   110  	SUB	$64, R3, R3                                 // message length - 64bytes, then compare with 64bytes
   111  	VADD	V2.S4, V0.S4, V0.S4
   112  	VADD	V3.S4, V1.S4, V1.S4
   113  	CBNZ	R3, blockloop
   114  
   115  sha256ret:
   116  
   117  	VST1	[V0.S4, V1.S4], (R0)                       // store hash value H
   118  	RET
   119  
   120  

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