arithmetic_decl.go

// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

//go:build (amd64 && blsasm) || (amd64 && blsadx)
// +build amd64,blsasm amd64,blsadx

package bls12381

import (
	"golang.org/x/sys/cpu"
)

func init() {
	if !enableADX || !cpu.X86.HasADX || !cpu.X86.HasBMI2 {
		mul = mulNoADX
	}
}

// Use ADX backend for default
var mul func(c, a, b *fe) = mulADX

func square(c, a *fe) {
	mul(c, a, a)
}

func neg(c, a *fe) {
	if a.isZero() {
		c.set(a)
	} else {
		_neg(c, a)
	}
}

//go:noescape
func add(c, a, b *fe)

//go:noescape
func addAssign(a, b *fe)

//go:noescape
func ladd(c, a, b *fe)

//go:noescape
func laddAssign(a, b *fe)

//go:noescape
func double(c, a *fe)

//go:noescape
func doubleAssign(a *fe)

//go:noescape
func ldouble(c, a *fe)

//go:noescape
func sub(c, a, b *fe)

//go:noescape
func subAssign(a, b *fe)

//go:noescape
func lsubAssign(a, b *fe)

//go:noescape
func _neg(c, a *fe)

//go:noescape
func mulNoADX(c, a, b *fe)

//go:noescape
func mulADX(c, a, b *fe)