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https://github.com/emmansun/gmsm.git
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108 lines
2.8 KiB
ArmAsm
108 lines
2.8 KiB
ArmAsm
// Copyright 2024 Sun Yimin. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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//go:build (ppc64 || ppc64le) && !purego
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#include "textflag.h"
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DATA ·rcon+0x00(SB)/8, $0x0706050403020100 // Permute for vector doubleword endian swap
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DATA ·rcon+0x08(SB)/8, $0x0f0e0d0c0b0a0908
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DATA ·rcon+0x10(SB)/8, $0x0f0f0f0f0f0f0f0f // bit_reverse_and_table
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DATA ·rcon+0x18(SB)/8, $0x0f0f0f0f0f0f0f0f
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DATA ·rcon+0x20(SB)/8, $0x0008040c020a060e // bit_reverse_table_l
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DATA ·rcon+0x28(SB)/8, $0x0109050d030b070f // bit_reverse_table_l
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DATA ·rcon+0x30(SB)/8, $0x0000000010111213 // data mask
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DATA ·rcon+0x38(SB)/8, $0x0000000014151617 // data mask
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DATA ·rcon+0x40(SB)/8, $0x0000000018191a1b // data mask
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DATA ·rcon+0x48(SB)/8, $0x000000001c1d1e1f // data mask
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DATA ·rcon+0x50(SB)/8, $0x0405060708090a0b // ks mask
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DATA ·rcon+0x58(SB)/8, $0x0001020304050607 // ks mask
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GLOBL ·rcon(SB), RODATA, $96
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#define XTMP1 V0
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#define XTMP2 V1
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#define XTMP3 V2
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#define XTMP4 V3
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#define XDATA V6
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#define XDIGEST V7
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#define KS_L V8
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#define KS_M1 V9
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#define BIT_REV_TAB_L V12
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#define BIT_REV_TAB_H V13
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#define BIT_REV_AND_TAB V14
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#define PTR R7
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// func eia3Round16B(t *uint32, keyStream *uint32, p *byte, tagSize int)
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TEXT ·eia3Round16B(SB),NOSPLIT,$0
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MOVD t+0(FP), R3
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MOVD ks+8(FP), R4
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MOVD p+16(FP), R5
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#ifndef GOARCH_ppc64le
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MOVD $·rcon(SB), PTR // PTR points to rcon addr
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LVX (PTR), XTMP1
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ADD $0x10, PTR
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#else
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MOVD $·rcon+0x10(SB), PTR // PTR points to rcon addr (skipping permute vector)
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#endif
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LXVD2X (R5)(R0), XDATA
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#ifndef GOARCH_ppc64le
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VPERM XDATA, XDATA, XTMP1, XDATA
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#endif
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LXVD2X (PTR)(R0), BIT_REV_AND_TAB
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VAND BIT_REV_AND_TAB, XDATA, XTMP3
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VSPLTISB $4, XTMP2;
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VSRW XDATA, XTMP2, XTMP1
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VAND BIT_REV_AND_TAB, XTMP1, XTMP1
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MOVD $0x20, PTR
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LXVD2X (PTR)(R0), BIT_REV_TAB_L
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VSLB BIT_REV_TAB_L, XTMP2, BIT_REV_TAB_H
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VPERM BIT_REV_TAB_L, BIT_REV_TAB_L, XTMP3, XTMP3
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VPERM BIT_REV_TAB_H, BIT_REV_TAB_H, XTMP1, XTMP1
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VXOR XTMP1, XTMP3, XTMP3 // XTMP3 - bit reverse data bytes
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// ZUC authentication part, 4x32 data bits
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// setup data
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VSPLTISB $0, XTMP2
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MOVD $0x30, PTR
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LXVD2X (PTR)(R0), XTMP4
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VPERM XTMP2, XTMP3, XTMP4, XTMP1
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MOVD $0x40, PTR
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LXVD2X (PTR)(R0), XTMP4
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VPERM XTMP2, XTMP3, XTMP4, XTMP2
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// setup KS
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LXVW4X (R4), KS_L
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MOVD $8, PTR
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LXVW4X (PTR)(R4), KS_M1
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MOVD $0x50, PTR
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LXVD2X (PTR)(R0), XTMP1
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VPERM KS_L, KS_L, XTMP1, KS_L
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VPERM KS_M1, KS_M1, XTMP1, KS_M1
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// clmul
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// xor the results from 4 32-bit words together
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// Calculate lower 32 bits of tag
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VPMSUMD XTMP1, KS_L, XTMP3
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VPMSUMD XTMP2, KS_M1, XTMP4
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VXOR XTMP3, XTMP4, XTMP3
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VSPLTW $2, XTMP3, XDIGEST
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// Update tag
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MFVSRWZ XDIGEST, PTR
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MOVWZ (R3), R6
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XOR R6, PTR, R6
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MOVW R6, (R3)
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// Copy last 16 bytes of KS to the front
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MOVD $16, PTR
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LXVD2X (PTR)(R4), XTMP1
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STXVD2X XTMP1, (R4)(R0)
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RET
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