2021-06-16 20:19:45 +00:00
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// Copyright 2018 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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2024-05-15 23:15:00 +00:00
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//go:build gc && !purego
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2021-06-16 20:19:45 +00:00
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#include "textflag.h"
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#define NUM_ROUNDS 10
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// func xorKeyStreamVX(dst, src []byte, key *[8]uint32, nonce *[3]uint32, counter *uint32)
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TEXT ·xorKeyStreamVX(SB), NOSPLIT, $0
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MOVD dst+0(FP), R1
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MOVD src+24(FP), R2
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MOVD src_len+32(FP), R3
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MOVD key+48(FP), R4
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MOVD nonce+56(FP), R6
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MOVD counter+64(FP), R7
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MOVD $·constants(SB), R10
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MOVD $·incRotMatrix(SB), R11
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MOVW (R7), R20
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AND $~255, R3, R13
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ADD R2, R13, R12 // R12 for block end
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AND $255, R3, R13
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loop:
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MOVD $NUM_ROUNDS, R21
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VLD1 (R11), [V30.S4, V31.S4]
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// load contants
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// VLD4R (R10), [V0.S4, V1.S4, V2.S4, V3.S4]
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WORD $0x4D60E940
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// load keys
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// VLD4R 16(R4), [V4.S4, V5.S4, V6.S4, V7.S4]
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WORD $0x4DFFE884
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// VLD4R 16(R4), [V8.S4, V9.S4, V10.S4, V11.S4]
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WORD $0x4DFFE888
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SUB $32, R4
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// load counter + nonce
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// VLD1R (R7), [V12.S4]
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WORD $0x4D40C8EC
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// VLD3R (R6), [V13.S4, V14.S4, V15.S4]
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WORD $0x4D40E8CD
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// update counter
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VADD V30.S4, V12.S4, V12.S4
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chacha:
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// V0..V3 += V4..V7
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// V12..V15 <<<= ((V12..V15 XOR V0..V3), 16)
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VADD V0.S4, V4.S4, V0.S4
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VADD V1.S4, V5.S4, V1.S4
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VADD V2.S4, V6.S4, V2.S4
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VADD V3.S4, V7.S4, V3.S4
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VEOR V12.B16, V0.B16, V12.B16
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VEOR V13.B16, V1.B16, V13.B16
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VEOR V14.B16, V2.B16, V14.B16
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VEOR V15.B16, V3.B16, V15.B16
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VREV32 V12.H8, V12.H8
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VREV32 V13.H8, V13.H8
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VREV32 V14.H8, V14.H8
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VREV32 V15.H8, V15.H8
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// V8..V11 += V12..V15
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// V4..V7 <<<= ((V4..V7 XOR V8..V11), 12)
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VADD V8.S4, V12.S4, V8.S4
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VADD V9.S4, V13.S4, V9.S4
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VADD V10.S4, V14.S4, V10.S4
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VADD V11.S4, V15.S4, V11.S4
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VEOR V8.B16, V4.B16, V16.B16
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VEOR V9.B16, V5.B16, V17.B16
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VEOR V10.B16, V6.B16, V18.B16
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VEOR V11.B16, V7.B16, V19.B16
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VSHL $12, V16.S4, V4.S4
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VSHL $12, V17.S4, V5.S4
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VSHL $12, V18.S4, V6.S4
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VSHL $12, V19.S4, V7.S4
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VSRI $20, V16.S4, V4.S4
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VSRI $20, V17.S4, V5.S4
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VSRI $20, V18.S4, V6.S4
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VSRI $20, V19.S4, V7.S4
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// V0..V3 += V4..V7
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// V12..V15 <<<= ((V12..V15 XOR V0..V3), 8)
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VADD V0.S4, V4.S4, V0.S4
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VADD V1.S4, V5.S4, V1.S4
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VADD V2.S4, V6.S4, V2.S4
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VADD V3.S4, V7.S4, V3.S4
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VEOR V12.B16, V0.B16, V12.B16
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VEOR V13.B16, V1.B16, V13.B16
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VEOR V14.B16, V2.B16, V14.B16
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VEOR V15.B16, V3.B16, V15.B16
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VTBL V31.B16, [V12.B16], V12.B16
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VTBL V31.B16, [V13.B16], V13.B16
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VTBL V31.B16, [V14.B16], V14.B16
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VTBL V31.B16, [V15.B16], V15.B16
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// V8..V11 += V12..V15
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// V4..V7 <<<= ((V4..V7 XOR V8..V11), 7)
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VADD V12.S4, V8.S4, V8.S4
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VADD V13.S4, V9.S4, V9.S4
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VADD V14.S4, V10.S4, V10.S4
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VADD V15.S4, V11.S4, V11.S4
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VEOR V8.B16, V4.B16, V16.B16
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VEOR V9.B16, V5.B16, V17.B16
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VEOR V10.B16, V6.B16, V18.B16
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VEOR V11.B16, V7.B16, V19.B16
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VSHL $7, V16.S4, V4.S4
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VSHL $7, V17.S4, V5.S4
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VSHL $7, V18.S4, V6.S4
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VSHL $7, V19.S4, V7.S4
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VSRI $25, V16.S4, V4.S4
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VSRI $25, V17.S4, V5.S4
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VSRI $25, V18.S4, V6.S4
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VSRI $25, V19.S4, V7.S4
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// V0..V3 += V5..V7, V4
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// V15,V12-V14 <<<= ((V15,V12-V14 XOR V0..V3), 16)
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VADD V0.S4, V5.S4, V0.S4
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VADD V1.S4, V6.S4, V1.S4
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VADD V2.S4, V7.S4, V2.S4
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VADD V3.S4, V4.S4, V3.S4
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VEOR V15.B16, V0.B16, V15.B16
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VEOR V12.B16, V1.B16, V12.B16
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VEOR V13.B16, V2.B16, V13.B16
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VEOR V14.B16, V3.B16, V14.B16
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VREV32 V12.H8, V12.H8
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VREV32 V13.H8, V13.H8
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VREV32 V14.H8, V14.H8
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VREV32 V15.H8, V15.H8
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// V10 += V15; V5 <<<= ((V10 XOR V5), 12)
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// ...
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VADD V15.S4, V10.S4, V10.S4
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VADD V12.S4, V11.S4, V11.S4
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VADD V13.S4, V8.S4, V8.S4
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VADD V14.S4, V9.S4, V9.S4
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VEOR V10.B16, V5.B16, V16.B16
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VEOR V11.B16, V6.B16, V17.B16
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VEOR V8.B16, V7.B16, V18.B16
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VEOR V9.B16, V4.B16, V19.B16
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VSHL $12, V16.S4, V5.S4
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VSHL $12, V17.S4, V6.S4
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VSHL $12, V18.S4, V7.S4
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VSHL $12, V19.S4, V4.S4
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VSRI $20, V16.S4, V5.S4
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VSRI $20, V17.S4, V6.S4
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VSRI $20, V18.S4, V7.S4
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VSRI $20, V19.S4, V4.S4
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// V0 += V5; V15 <<<= ((V0 XOR V15), 8)
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// ...
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VADD V5.S4, V0.S4, V0.S4
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VADD V6.S4, V1.S4, V1.S4
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VADD V7.S4, V2.S4, V2.S4
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VADD V4.S4, V3.S4, V3.S4
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VEOR V0.B16, V15.B16, V15.B16
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VEOR V1.B16, V12.B16, V12.B16
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VEOR V2.B16, V13.B16, V13.B16
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VEOR V3.B16, V14.B16, V14.B16
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VTBL V31.B16, [V12.B16], V12.B16
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VTBL V31.B16, [V13.B16], V13.B16
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VTBL V31.B16, [V14.B16], V14.B16
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VTBL V31.B16, [V15.B16], V15.B16
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// V10 += V15; V5 <<<= ((V10 XOR V5), 7)
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// ...
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VADD V15.S4, V10.S4, V10.S4
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VADD V12.S4, V11.S4, V11.S4
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VADD V13.S4, V8.S4, V8.S4
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VADD V14.S4, V9.S4, V9.S4
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VEOR V10.B16, V5.B16, V16.B16
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VEOR V11.B16, V6.B16, V17.B16
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VEOR V8.B16, V7.B16, V18.B16
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VEOR V9.B16, V4.B16, V19.B16
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VSHL $7, V16.S4, V5.S4
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VSHL $7, V17.S4, V6.S4
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VSHL $7, V18.S4, V7.S4
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VSHL $7, V19.S4, V4.S4
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VSRI $25, V16.S4, V5.S4
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VSRI $25, V17.S4, V6.S4
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VSRI $25, V18.S4, V7.S4
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VSRI $25, V19.S4, V4.S4
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SUB $1, R21
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CBNZ R21, chacha
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// VLD4R (R10), [V16.S4, V17.S4, V18.S4, V19.S4]
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WORD $0x4D60E950
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// VLD4R 16(R4), [V20.S4, V21.S4, V22.S4, V23.S4]
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WORD $0x4DFFE894
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VADD V30.S4, V12.S4, V12.S4
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VADD V16.S4, V0.S4, V0.S4
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VADD V17.S4, V1.S4, V1.S4
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VADD V18.S4, V2.S4, V2.S4
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VADD V19.S4, V3.S4, V3.S4
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// VLD4R 16(R4), [V24.S4, V25.S4, V26.S4, V27.S4]
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WORD $0x4DFFE898
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// restore R4
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SUB $32, R4
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// load counter + nonce
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// VLD1R (R7), [V28.S4]
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WORD $0x4D40C8FC
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// VLD3R (R6), [V29.S4, V30.S4, V31.S4]
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WORD $0x4D40E8DD
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VADD V20.S4, V4.S4, V4.S4
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VADD V21.S4, V5.S4, V5.S4
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VADD V22.S4, V6.S4, V6.S4
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VADD V23.S4, V7.S4, V7.S4
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VADD V24.S4, V8.S4, V8.S4
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VADD V25.S4, V9.S4, V9.S4
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VADD V26.S4, V10.S4, V10.S4
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VADD V27.S4, V11.S4, V11.S4
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VADD V28.S4, V12.S4, V12.S4
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VADD V29.S4, V13.S4, V13.S4
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VADD V30.S4, V14.S4, V14.S4
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VADD V31.S4, V15.S4, V15.S4
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VZIP1 V1.S4, V0.S4, V16.S4
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VZIP2 V1.S4, V0.S4, V17.S4
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VZIP1 V3.S4, V2.S4, V18.S4
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VZIP2 V3.S4, V2.S4, V19.S4
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VZIP1 V5.S4, V4.S4, V20.S4
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VZIP2 V5.S4, V4.S4, V21.S4
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VZIP1 V7.S4, V6.S4, V22.S4
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VZIP2 V7.S4, V6.S4, V23.S4
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VZIP1 V9.S4, V8.S4, V24.S4
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VZIP2 V9.S4, V8.S4, V25.S4
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VZIP1 V11.S4, V10.S4, V26.S4
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VZIP2 V11.S4, V10.S4, V27.S4
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VZIP1 V13.S4, V12.S4, V28.S4
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VZIP2 V13.S4, V12.S4, V29.S4
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VZIP1 V15.S4, V14.S4, V30.S4
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VZIP2 V15.S4, V14.S4, V31.S4
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VZIP1 V18.D2, V16.D2, V0.D2
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VZIP2 V18.D2, V16.D2, V4.D2
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VZIP1 V19.D2, V17.D2, V8.D2
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VZIP2 V19.D2, V17.D2, V12.D2
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VLD1.P 64(R2), [V16.B16, V17.B16, V18.B16, V19.B16]
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VZIP1 V22.D2, V20.D2, V1.D2
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VZIP2 V22.D2, V20.D2, V5.D2
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VZIP1 V23.D2, V21.D2, V9.D2
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VZIP2 V23.D2, V21.D2, V13.D2
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VLD1.P 64(R2), [V20.B16, V21.B16, V22.B16, V23.B16]
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VZIP1 V26.D2, V24.D2, V2.D2
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VZIP2 V26.D2, V24.D2, V6.D2
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VZIP1 V27.D2, V25.D2, V10.D2
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VZIP2 V27.D2, V25.D2, V14.D2
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VLD1.P 64(R2), [V24.B16, V25.B16, V26.B16, V27.B16]
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VZIP1 V30.D2, V28.D2, V3.D2
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VZIP2 V30.D2, V28.D2, V7.D2
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VZIP1 V31.D2, V29.D2, V11.D2
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VZIP2 V31.D2, V29.D2, V15.D2
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VLD1.P 64(R2), [V28.B16, V29.B16, V30.B16, V31.B16]
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VEOR V0.B16, V16.B16, V16.B16
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VEOR V1.B16, V17.B16, V17.B16
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VEOR V2.B16, V18.B16, V18.B16
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VEOR V3.B16, V19.B16, V19.B16
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VST1.P [V16.B16, V17.B16, V18.B16, V19.B16], 64(R1)
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VEOR V4.B16, V20.B16, V20.B16
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VEOR V5.B16, V21.B16, V21.B16
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VEOR V6.B16, V22.B16, V22.B16
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VEOR V7.B16, V23.B16, V23.B16
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VST1.P [V20.B16, V21.B16, V22.B16, V23.B16], 64(R1)
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VEOR V8.B16, V24.B16, V24.B16
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VEOR V9.B16, V25.B16, V25.B16
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VEOR V10.B16, V26.B16, V26.B16
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VEOR V11.B16, V27.B16, V27.B16
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VST1.P [V24.B16, V25.B16, V26.B16, V27.B16], 64(R1)
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VEOR V12.B16, V28.B16, V28.B16
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VEOR V13.B16, V29.B16, V29.B16
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VEOR V14.B16, V30.B16, V30.B16
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VEOR V15.B16, V31.B16, V31.B16
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VST1.P [V28.B16, V29.B16, V30.B16, V31.B16], 64(R1)
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ADD $4, R20
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MOVW R20, (R7) // update counter
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CMP R2, R12
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BGT loop
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RET
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DATA ·constants+0x00(SB)/4, $0x61707865
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DATA ·constants+0x04(SB)/4, $0x3320646e
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DATA ·constants+0x08(SB)/4, $0x79622d32
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DATA ·constants+0x0c(SB)/4, $0x6b206574
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GLOBL ·constants(SB), NOPTR|RODATA, $32
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DATA ·incRotMatrix+0x00(SB)/4, $0x00000000
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DATA ·incRotMatrix+0x04(SB)/4, $0x00000001
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DATA ·incRotMatrix+0x08(SB)/4, $0x00000002
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DATA ·incRotMatrix+0x0c(SB)/4, $0x00000003
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DATA ·incRotMatrix+0x10(SB)/4, $0x02010003
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DATA ·incRotMatrix+0x14(SB)/4, $0x06050407
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DATA ·incRotMatrix+0x18(SB)/4, $0x0A09080B
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DATA ·incRotMatrix+0x1c(SB)/4, $0x0E0D0C0F
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GLOBL ·incRotMatrix(SB), NOPTR|RODATA, $32
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