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https://github.com/emmansun/gmsm.git
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101 lines
2.9 KiB
ArmAsm
101 lines
2.9 KiB
ArmAsm
//go:build !purego
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#include "textflag.h"
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DATA bit_reverse_table<>+0x00(SB)/8, $0x0e060a020c040800
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DATA bit_reverse_table<>+0x08(SB)/8, $0x0f070b030d050901
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DATA bit_reverse_table<>+0x10(SB)/8, $0xe060a020c0408000
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DATA bit_reverse_table<>+0x18(SB)/8, $0xf070b030d0509010
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GLOBL bit_reverse_table<>(SB), RODATA, $32
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DATA shuf_mask_dw<>+0x00(SB)/8, $0xffffffff03020100
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DATA shuf_mask_dw<>+0x08(SB)/8, $0xffffffff07060504
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DATA shuf_mask_dw<>+0x10(SB)/8, $0xffffffff0b0a0908
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DATA shuf_mask_dw<>+0x18(SB)/8, $0xffffffff0f0e0d0c
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GLOBL shuf_mask_dw<>(SB), RODATA, $32
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#define AX R2
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#define BX R3
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#define CX R4
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#define DX R5
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#define XTMP1 V1
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#define XTMP2 V2
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#define XTMP3 V3
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#define XTMP4 V4
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#define XTMP5 V5
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#define XTMP6 V6
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#define XDATA V7
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#define XDIGEST V8
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#define KS_L V9
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#define KS_M1 V10
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#define KS_M2 V11
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#define KS_H V12
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#define BIT_REV_TAB_L V20
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#define BIT_REV_TAB_H V21
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#define BIT_REV_AND_TAB V22
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#define SHUF_MASK_DW0_DW1 V23
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#define SHUF_MASK_DW2_DW3 V24
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#define LOAD_GLOBAL_DATA() \
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MOVD $bit_reverse_table<>(SB), R0 \
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VLD1 (R0), [BIT_REV_TAB_L.B16, BIT_REV_TAB_H.B16] \
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MOVW $0x0F0F0F0F, R0 \
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VDUP R0, BIT_REV_AND_TAB.S4 \
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MOVD $shuf_mask_dw<>(SB), R0 \
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VLD1 (R0), [SHUF_MASK_DW0_DW1.B16, SHUF_MASK_DW2_DW3.B16]
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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), AX
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MOVD ks+8(FP), BX
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MOVD p+16(FP), CX
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MOVD tagSize+24(FP), DX
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LOAD_GLOBAL_DATA()
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// Reverse data bytes
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VLD1 (CX), [XDATA.B16]
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VAND BIT_REV_AND_TAB.B16, XDATA.B16, XTMP3.B16
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VUSHR $4, XDATA.S4, XTMP1.S4
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VAND BIT_REV_AND_TAB.B16, XTMP1.B16, XTMP1.B16
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VTBL XTMP3.B16, [BIT_REV_TAB_H.B16], XTMP3.B16
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VTBL XTMP1.B16, [BIT_REV_TAB_L.B16], XTMP1.B16
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VEOR XTMP1.B16, XTMP3.B16, XTMP3.B16 // XTMP3 - bit reverse data bytes
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// ZUC authentication part, 4x32 data bits
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// setup KS
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VLD1 (BX), [XTMP1.B16, XTMP2.B16]
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VST1 [XTMP2.B16], (BX) // Copy last 16 bytes of KS to the front
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// TODO: Any better solution???
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VDUP XTMP1.S[1], KS_L.S4
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VMOV XTMP1.S[0], KS_L.S[1]
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VMOV XTMP1.S[2], KS_L.S[2] // KS bits [63:32 31:0 95:64 63:32]
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VDUP XTMP1.S[3], KS_M1.S4
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VMOV XTMP1.S[2], KS_M1.S[1]
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VMOV XTMP2.S[0], KS_M1.S[2] // KS bits [127:96 95:64 159:128 127:96]
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// setup DATA
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VTBL SHUF_MASK_DW0_DW1.B16, [XTMP3.B16], XTMP1.B16 // XTMP1 - Data bits [31:0 0s 63:32 0s]
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VTBL SHUF_MASK_DW2_DW3.B16, [XTMP3.B16], XTMP2.B16 // XTMP2 - Data bits [95:64 0s 127:96 0s]
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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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VPMULL KS_L.D1, XTMP1.D1, XTMP3.Q1
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VPMULL2 KS_L.D2, XTMP1.D2, XTMP4.Q1
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VPMULL KS_M1.D1, XTMP2.D1, XTMP5.Q1
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VPMULL2 KS_M1.D2, XTMP2.D2, XTMP6.Q1
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VEOR XTMP3.B16, XTMP4.B16, XTMP3.B16
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VEOR XTMP5.B16, XTMP6.B16, XTMP5.B16
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VEOR XTMP3.B16, XTMP5.B16, XDIGEST.B16
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VMOV XDIGEST.S[1], R10
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MOVW (AX), R11
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EORW R10, R11
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MOVW R11, (AX)
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RET
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