//go:build gc && !purego

package chacha20poly1305

import (
	"encoding/binary"

	"golang.org/x/crypto/internal/alias"
	"golang.org/x/sys/cpu"
)

//go:noescape
func chacha20Poly1305Open(dst []byte, key []uint32, src, ad []byte) bool

//go:noescape
func chacha20Poly1305Seal(dst []byte, key []uint32, src, ad []byte)

var (
	useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI2
)

	polyMul

	// Finished AD
hashADDone:
	RET

// ----------------------------------------------------------------------------
// func chacha20Poly1305Open(dst, key, src, ad []byte) bool
TEXT ·chacha20Poly1305Open(SB), 0, $288-97
	// For aligned stack access
	MOVQ SP, BP
	ADDQ $32, BP
	ANDQ $-32, BP
	MOVQ dst+0(FP), oup
	MOVQ key+24(FP), keyp
	MOVQ src+48(FP), inp