// Copyright 2009 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 !purego

#include "textflag.h"

// func addMulVVW1024(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW1024(SB), $0-16
	MOVL	$32, BX
	JMP		addMulVVWx(SB)

// func addMulVVW1536(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW1536(SB), $0-16
	MOVL	$48, BX
	JMP		addMulVVWx(SB)

// func addMulVVW2048(z, x *uint, y uint) (c uint)
TEXT ·addMulVVW2048(SB), $0-16
	MOVL	$64, BX
	JMP		addMulVVWx(SB)

TEXT addMulVVWx(SB), NOFRAME|NOSPLIT, $0
	MOVL z+0(FP), DI
	MOVL x+4(FP), SI
	MOVL y+8(FP), BP
	LEAL (DI)(BX*4), DI
	LEAL (SI)(BX*4), SI
	NEGL BX			// i = -n
	MOVL $0, CX		// c = 0
	JMP E6

L6:	MOVL (SI)(BX*4), AX
	MULL BP
	ADDL CX, AX
	ADCL $0, DX
	ADDL AX, (DI)(BX*4)
	ADCL $0, DX
	MOVL DX, CX
	ADDL $1, BX		// i++

E6:	CMPL BX, $0		// i < 0
	JL L6

	MOVL CX, c+12(FP)
	RET