SHA256                      // import crypto/sha256
	SHA384                      // import crypto/sha512
	SHA512                      // import crypto/sha512
	MD5SHA1                     // no implementation; MD5+SHA1 used for TLS RSA
	RIPEMD160                   // import golang.org/x/crypto/ripemd160
	SHA3_224                    // import golang.org/x/crypto/sha3
	SHA3_256                    // import golang.org/x/crypto/sha3

// 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.

#include "textflag.h"

// See memmove Go doc for important implementation constraints.

// func memmove(to, from unsafe.Pointer, n uintptr)
TEXT runtime·memmove<ABIInternal>(SB), NOSPLIT|NOFRAME, $0-24
	BNE	R6, check
	RET

check:
	SGTU	R4, R5, R7
	BNE	R7, backward

// This file contains CRC32 algorithms that are not specific to any architecture
// and don't use hardware acceleration.
//
// The simple (and slow) CRC32 implementation only uses a 256*4 bytes table.
//
// The slicing-by-8 algorithm is a faster implementation that uses a bigger
// table (8*256*4 bytes).

package crc32

import "internal/byteorder"

// simpleMakeTable allocates and constructs a Table for the specified

// it makes sure that a block on a channel send that unblocks briefly only to
// immediately go back to sleep (in such a way that doesn't reveal any useful
// information, and is purely an artifact of the runtime implementation) doesn't
// make it into the trace.

//go:build ignore

package main

import (
	"context"
	"log"
	"os"
	"runtime"
	"runtime/trace"
	"sync"
)

func main() {

// GC checkmarks
//
// In a concurrent garbage collector, one worries about failing to mark
// a live object due to mutations without write barriers or bugs in the
// collector implementation. As a sanity check, the GC has a 'checkmark'
// mode that retraverses the object graph with the world stopped, to make
// sure that everything that should be marked is marked.

package runtime

import (

// license that can be found in the LICENSE file.

//go:build gc

#include "textflag.h"

//
// System call support for mips64, OpenBSD
//

// Just jump to package syscall's implementation for all these functions.
// The runtime may know about them.

TEXT	·Syscall(SB),NOSPLIT,$0-56
	JMP	syscall·Syscall(SB)

TEXT	·Syscall6(SB),NOSPLIT,$0-80
	JMP	syscall·Syscall6(SB)

// license that can be found in the LICENSE file.

package fs

import (
	"errors"
	"internal/bytealg"
	"slices"
)

// ReadDirFS is the interface implemented by a file system
// that provides an optimized implementation of [ReadDir].
type ReadDirFS interface {
	FS

	// ReadDir reads the named directory
	// and returns a list of directory entries sorted by filename.
	ReadDir(name string) ([]DirEntry, error)
}

//go:build (darwin || freebsd || netbsd || openbsd) && gc

#include "textflag.h"

//
// System call support for ppc64, BSD
//

// Just jump to package syscall's implementation for all these functions.
// The runtime may know about them.

TEXT	·Syscall(SB),NOSPLIT,$0-56
	JMP	syscall·Syscall(SB)

TEXT	·Syscall6(SB),NOSPLIT,$0-80
	JMP	syscall·Syscall6(SB)

	return rthash([]byte(s), state)
}

func randUint64() uint64 {
	buf := make([]byte, 8)
	_, _ = rand.Read(buf)
	return byteorder.LeUint64(buf)
}

// This is a port of wyhash implementation in runtime/hash64.go,
// without using unsafe for purego.

const (
	m1 = 0xa0761d6478bd642f
	m2 = 0xe7037ed1a0b428db
	m3 = 0x8ebc6af09c88c6e3
	m4 = 0x589965cc75374cc3
	m5 = 0x1d8e4e27c47d124f
)

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

package fs

import "io"

// ReadFileFS is the interface implemented by a file system
// that provides an optimized implementation of [ReadFile].
type ReadFileFS interface {
	FS

	// ReadFile reads the named file and returns its contents.
	// A successful call returns a nil error, not io.EOF.