func IsLoong64MUL(op obj.As) bool {
	switch op {
	case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,
		loong64.ADIV, loong64.ADIVU, loong64.ADIVV, loong64.ADIVVU,
		loong64.AREM, loong64.AREMU, loong64.AREMV, loong64.AREMVU:
		return true
	}
	return false
}

// IsLoong64RDTIME reports whether the op (as defined by an loong64.A*
// constant) is one of the RDTIMELW/RDTIMEHW/RDTIMED instructions that

Guoqi Chen <******@****.***> 1692152533 +0800

WANG Xuerui <******@****.***> 1679394224 +0800

golang.org/******@****.***-loong64

-- .mod --
module golang.org/toolchain
-- .info --
{"Version":"v0.0.1-go1.999testmod.linux-loong64"}
-- go.mod --
module golang.org/toolchain
-- bin/go --
#!/bin/sh
echo go1.999testmod here!
-- bin/gofmt --
echo i am unused

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package loong64

import (
	"cmd/compile/internal/ssa"
	"cmd/compile/internal/ssagen"
	"cmd/internal/obj/loong64"
)

func Init(arch *ssagen.ArchInfo) {
	arch.LinkArch = &loong64.Linkloong64
	arch.REGSP = loong64.REGSP
	arch.MAXWIDTH = 1 << 50
	arch.ZeroRange = zerorange
	arch.Ginsnop = ginsnop

	"fmt"
	"internal/buildcfg"
	"log"
	"os"
)

var archInits = map[string]func(*ssagen.ArchInfo){
	"386":      x86.Init,
	"amd64":    amd64.Init,
	"arm":      arm.Init,
	"arm64":    arm64.Init,
	"loong64":  loong64.Init,
	"mips":     mips.Init,
	"mipsle":   mips.Init,
	"mips64":   mips64.Init,
	"mips64le": mips64.Init,
	"ppc64":    ppc64.Init,
	"ppc64le":  ppc64.Init,
	"riscv64":  riscv64.Init,
	"s390x":    s390x.Init,

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build linux && loong64

package runtime

const (
	// vdsoArrayMax is the byte-size of a maximally sized array on this architecture.
	// See cmd/compile/internal/loong64/galign.go arch.MAXWIDTH initialization.
	vdsoArrayMax = 1<<50 - 1
)

// not currently described in manpages as of May 2022, but will eventually

func rot64(x uint64) uint64 {
	var a uint64

	// amd64:"ROLQ\t[$]7"
	// ppc64x:"ROTL\t[$]7"
	// loong64: "ROTRV\t[$]57"
	// riscv64: "RORI\t[$]57"
	a += x<<7 | x>>57

	// amd64:"ROLQ\t[$]8"
	// arm64:"ROR\t[$]56"
	// s390x:"RISBGZ\t[$]0, [$]63, [$]8, "
	// ppc64x:"ROTL\t[$]8"
	// loong64: "ROTRV\t[$]56"
	// riscv64: "RORI\t[$]56"
	a += x<<8 + x>>56

	// amd64:"ROLQ\t[$]9"
	// arm64:"ROR\t[$]55"

// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build loong64

package goarch

const (
	_ArchFamily          = LOONG64
	_DefaultPhysPageSize = 16384
	_PCQuantum           = 4
	_MinFrameSize        = 8
	_StackAlign          = PtrSize

	// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
	// loong64: "ADDV", "SGTU"
	// ppc64x: "ADDC", "ADDE", "ADDZE"
	// s390x:"ADDE","ADDC\t[$]-1,"
	// mips64:"ADDV","SGTU"
	// riscv64: "ADD","SLTU"
	return bits.Add(x, 7, ci)
}

func AddZ(x, y uint) (r, co uint) {
	// arm64:"ADDS","ADC",-"ADCS",-"ADD\t",-"CMP"
	// amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
	// loong64: "ADDV", "SGTU"
	// ppc64x: "ADDC", -"ADDE", "ADDZE"