// An attempt to synchronize on the address would cause crash.
	MOVD	R9, R21	// remember the original function
	MOVD	$__tsan_go_ignore_sync_begin(SB), R9
	load_g
	MOVD	g_racectx(g), R0	// goroutine context
	BL	racecall<>(SB)
	MOVD	R21, R9	// restore the original function
	// Call the atomic function.
	// racecall will call LLVM race code which might clobber R28 (g)
	load_g

	// if a method is embedded via multiple overlapping embedded interfaces, we
	// don't provide a guarantee which "original m" got chosen for the embedding
	// interface. See also go.dev/issue/34421.
	//
	// If we don't care to provide this identity guarantee anymore, instead of
	// reusing the original method in embeddings, we can clone the method's Func
	// Object and give it the position of a corresponding embedded interface. Then

//	uppercase mapping bytes
//	titlecase mapping bytes
//	closure mapping bytes (for NFKC_Casefold). (TODO)
//
// Fallbacks:
//
//	missing fold  -> lower
//	missing title -> upper
//	all missing   -> original rune
//
// exceptions starts with a dummy byte to enforce that there is no zero index
// value.
const (
	lengthMask = 0x07
	lengthBits = 3
	noChange   = 0
)

// References to generated trie.

// Original source:
//	http://www.zorinaq.com/papers/md5-amd64.html
//	http://www.zorinaq.com/papers/md5-amd64.tar.bz2
//
// Translated from Perl generating GNU assembly into
// #defines generating 8a assembly, and adjusted for 386,
// by the Go Authors.

//go:build !purego

#include "textflag.h"

// MD5 optimized for AMD64.
//
// Author: Marc Bevand <bevand_m (at) epita.fr>

//
// [underlying type]: https://go.dev/ref/spec#Underlying_types.
func (a *Alias) Underlying() Type { return unalias(a).Underlying() }

// Origin returns the generic Alias type of which a is an instance.
// If a is not an instance of a generic alias, Origin returns a.
func (a *Alias) Origin() *Alias { return a.orig }

// TypeParams returns the type parameters of the alias type a, or nil.

	-run=""
		if non-empty, specifies a regular expression to select
		directives whose full original source text (excluding
		any trailing spaces and final newline) matches the
		expression.

	-skip=""
		if non-empty, specifies a regular expression to suppress
		directives whose full original source text (excluding
		any trailing spaces and final newline) matches the

// instantiated types, this is same as the type name of the origin type.
func (t *Named) Obj() *TypeName {
	if t.inst == nil {
		return t.obj
	}
	return t.inst.orig.obj
}

// Origin returns the generic type from which the named type t is
// instantiated. If t is not an instantiated type, the result is t.
func (t *Named) Origin() *Named {
	if t.inst == nil {
		return t
	}
	return t.inst.orig

// It is also valid to use &^ to round pointers, usually for alignment.
// In all cases, the result must continue to point into the original allocated object.
//
// Unlike in C, it is not valid to advance a pointer just beyond the end of
// its original allocation:
//
//	// INVALID: end points outside allocated space.
//	var s thing
//	end = unsafe.Pointer(uintptr(unsafe.Pointer(&s)) + unsafe.Sizeof(s))
//

// Methods attached to a *Named type are also instantiated, and associated with
// a new *Func that has the same position as the original method, but nil function
// scope.
//
// If ctxt is non-nil, it may be used to de-duplicate the instance against
// previous instances with the same identity. As a special case, generic
// *Signature origin types are only considered identical if they are pointer
// equivalent, so that instantiating distinct (but possibly identical)

	// An attempt to synchronize on the address would cause crash.
	MOVQ	AX, BX	// remember the original function
	MOVQ	$__tsan_go_ignore_sync_begin(SB), AX
	MOVQ	g_racectx(R14), RARG0	// goroutine context
	CALL	racecall<>(SB)
	MOVQ	BX, AX	// restore the original function
	// Call the atomic function.
	MOVQ	g_racectx(R14), RARG0	// goroutine context
	MOVQ	8(SP), RARG1	// caller pc