mirror of
https://github.com/fumiama/go-base16384.git
synced 2026-06-05 00:32:52 +08:00
123 lines
2.7 KiB
ArmAsm
123 lines
2.7 KiB
ArmAsm
//go:build arm64
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// +build arm64
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#include "textflag.h"
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// func _encode(offset, outlen int, b, encd []byte) (sum uint64, &vals[n] uintptr)
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TEXT ·_encode(SB), NOSPLIT, $0-81
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MOVD ·offset+0(FP), R0
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MOVD ·data+16(FP), R9
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MOVD ·dlen+24(FP), R3
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MOVD ·encd+40(FP), R5
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SUBW $6, R3, R3
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CMPW $0, R3
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BLE enctil
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MOVW $0x4e00, R11
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SUB $8, R5, R14
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SUB $4, R5, R13
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MOVD $2, R8
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MOVW $0, R10 // int32_t i = 0
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MOVK $(0x4e00<<16), R11
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enclop:
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MOVW (R9), R4
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ADDW $7, R10, R10
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MOVW R8, R12
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CMPW R3, R10
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REVW R4, R4
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ADD $7, R9, R9
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LSRW $2, R4, R6
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UBFX $4, R4, $14, R15
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ANDW $0x3fff0000, R6, R6
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UBFIZW $26, R4, $4, R7
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ORRW R15, R6, R6
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ADDW R11, R6, R6
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REVW R6, R6
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MOVW R6, (R14)(R8<<2)
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MOVW -3(R9), R4
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REVW R4, R4
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LSRW $6, R4, R4
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ANDW $0x3fffffc, R4, R4
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ORRW R7, R4, R4
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ANDW $0x3fff0000, R4, R6
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UBFX $2, R4, $14, R4
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ORRW R6, R4, R4
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ADDW R11, R4, R4
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REVW R4, R4
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MOVW R4, (R13)(R8<<2)
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ADDW $2, R8, R8
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BLT enclop
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encrem:
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ANDSW $0xff, R0, R0
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BEQ encret
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MOVBU (R2)(R10.SXTW), R3
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UXTW R12, R8
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CMPW $1, R0
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SXTW R10, R10
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ADD R8<<2, R5, R7
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UBFIZW $14, R3, $2, R4
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ORRW R3>>2, R4, R3
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BEQ encsum
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ADD R10, R2, R9
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CMPW $2, R0
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MOVBU 1(R9), R6
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LSLW $6, R6, R4
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UBFIZW $20, R6, $2, R6
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ANDW $0x3f00, R4, R4
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ORRW R3, R4, R3
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ORRW R3, R6, R3
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BEQ encsum
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MOVBU 2(R9), R4
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CMPW $3, R0
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LSLW $12, R4, R6
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ANDW $0xf0000, R6, R6
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ORRW R4<<28, R6, R4
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ORRW R4, R3, R3
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BEQ encsum
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ADD $3, R10, R10
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ADDW $1, R12, R12
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CMPW $4, R0
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ADD R12<<2, R5, R7
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MOVBU (R2)(R10), R4
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LSLW $20, R4, R4
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ANDW $0xf000000, R4, R4
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ORRW R3, R4, R3
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ADDW $0x4e0000, R3, R3
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ADDW $78, R3, R3
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MOVW R3, (R5)(R8<<2)
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MOVBU (R2)(R10), R3
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UBFIZW $2, R3, $4, R3
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BEQ encsum
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MOVBU 4(R9), R4
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CMPW $5, R0
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UBFIZW $10, R4, $6, R2
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ORRW R3, R2, R3
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ORRW R4>>6, R3, R3
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BEQ encsum
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MOVBU 5(R9), R4
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LSLW $2, R4, R2
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UBFIZW $16, R4, $6, R4
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ANDW $0x300, R2, R2
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ORRW R4, R2, R2
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ORRW R2, R3, R3
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encsum:
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ADDW $0x4e0000, R3, R3
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ADDW $0x4e, R3, R3
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MOVD R3, ·sum+64(FP)
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MOVD R7, ·n+72(FP)
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encret:
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RET
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enctil:
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MOVW $0, R10
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MOVW $0, R12
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JMP encrem
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// func _decode(offset, outlen int, b, decd []byte)
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TEXT ·_decode(SB), NOSPLIT, $0-64
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