CgoCheckMemmove   *obj.LSym
	CgoCheckPtrWrite  *obj.LSym
	CheckPtrAlignment *obj.LSym
	Deferproc         *obj.LSym
	Deferprocat       *obj.LSym
	DeferprocStack    *obj.LSym
	Deferreturn       *obj.LSym
	Duffcopy          *obj.LSym
	Duffzero          *obj.LSym
	GCWriteBarrier    [8]*obj.LSym
	Goschedguarded    *obj.LSym
	Growslice         *obj.LSym
	InterfaceSwitch   *obj.LSym
	Memmove           *obj.LSym

	REGLINK = REG_R1
	REGSP   = REG_R3
	REGRET  = REG_R20 // not use
	REGARG  = -1      // -1 disables passing the first argument in register
	REGRT1  = REG_R20 // reserved for runtime, duffzero and duffcopy
	REGRT2  = REG_R21 // reserved for runtime, duffcopy
	REGCTXT = REG_R29 // context for closures
	REGG    = REG_R22 // G in loong64
	REGTMP  = REG_R30 // used by the assembler
	FREGRET = REG_F0  // not use
)

	bsink = []byte("012345")

	// 3978425819141910832 = 0x3736353433323130
	// 7306073769690871863 = 0x6564636261393837
	// amd64:`MOVQ\t\$3978425819141910832`,`MOVQ\t\$7306073769690871863`
	//   386:`MOVL\t\$858927408, \(`,`DUFFCOPY`
	// arm64:`MOVD\t\$3978425819141910832`,`MOVD\t\$7306073769690871863`,`MOVD\t\$15`
	//  wasm:`I64Const\t\$3978425819141910832`,`I64Store\t\$0`,`I64Const\t\$7306073769690871863`,`I64Store\t\$7`
	bsink = []byte("0123456789abcde")

	REGSB   = REG_R28
	REGLINK = REG_R31
	REGRET  = REG_R1
	REGARG  = -1      /* -1 disables passing the first argument in register */
	REGRT1  = REG_R1  /* reserved for runtime, duffzero and duffcopy */
	REGRT2  = REG_R2  /* reserved for runtime, duffcopy */
	REGCTXT = REG_R22 /* context for closures */
	REGG    = REG_R30 /* G */
	REGTMP  = REG_R23 /* used by the linker */
	FREGRET = REG_F0
)

// runtime·duffcopy is a Duff's device for copying memory.
// The compiler jumps to computed addresses within
// the routine to copy chunks of memory.
// Source and destination must not overlap.
// Do not change duffcopy without also
// changing the uses in cmd/compile/internal/*/*.go.

// See the zero* and copy* generators below
// for architecture-specific comments.

// mkduff generates duff_*.s.
package main

import (

	{"deferprocStack", 1},
	{"deferreturn", 1},
	{"newproc", 1},
	{"panicoverflow", 1},
	{"sigpanic", 1},

	// compiler backend inserted calls
	{"gcWriteBarrier", 1},
	{"duffzero", 1},
	{"duffcopy", 1},

	// assembler backend inserted calls
	{"morestack", 0},        // asm function, ABI0
	{"morestackc", 0},       // asm function, ABI0
	{"morestack_noctxt", 0}, // asm function, ABI0

	{"runtime.deferreturn", 1},
	{"runtime.newproc", 1},
	{"runtime.panicoverflow", 1},
	{"runtime.sigpanic", 1},
	{"runtime.gcWriteBarrier", 1},
	{"runtime.duffzero", 1},
	{"runtime.duffcopy", 1},
	{"runtime.morestack", 0},
	{"runtime.morestackc", 0},
	{"runtime.morestack_noctxt", 0},
	{"type:int8", 0},
	{"type:*int8", 0},
	{"type:uint8", 0},
	{"type:*uint8", 0},
	{"type:int16", 0},

	REGSP   = REG_R1
	REGSB   = REG_R2
	REGRET  = REG_R3
	REGARG  = -1      /* -1 disables passing the first argument in register */
	REGRT1  = REG_R20 /* reserved for runtime, duffzero and duffcopy */
	REGRT2  = REG_R21 /* reserved for runtime, duffcopy */
	REGMIN  = REG_R7  /* register variables allocated from here to REGMAX */
	REGCTXT = REG_R11 /* context for closures */
	REGTLS  = REG_R13 /* C ABI TLS base pointer */
	REGMAX  = REG_R27

				p.From.Reg = REGSP
			}

		case obj.ADUFFCOPY:
			//  ADR	ret_addr, R27
			//  STP	(FP, R27), -24(SP)
			//  SUB	24, SP, FP
			//  DUFFCOPY
			// ret_addr:
			//  SUB	8, SP, FP

			q1 := p
			// copy DUFFCOPY from q1 to q4
			q4 := obj.Appendp(p, c.newprog)
			q4.Pos = p.Pos
			q4.As = obj.ADUFFCOPY
			q4.To = p.To

			q1.As = AADR
			q1.From.Type = obj.TYPE_BRANCH

			},
			typ:            "Mem",
			faultOnNilArg0: true,
		},

		// duffcopy
		// arg0 = address of dst memory (in R21, changed as side effect)
		// arg1 = address of src memory (in R20, changed as side effect)
		// arg2 = mem
		// auxint = offset into duffcopy code to start executing
		// returns mem
		{
			name:      "DUFFCOPY",
			aux:       "Int64",
			argLength: 3,
			reg: regInfo{