forked from Consensys/gnark-crypto
/
arith.go
30 lines (26 loc) · 911 Bytes
/
arith.go
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// Copyright 2020 ConsenSys Software Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Code generated by consensys/gnark-crypto DO NOT EDIT
package goldilocks
import (
"math/bits"
)
// madd0 hi = a*b + c (discards lo bits)
func madd0(a, b, c uint64) (hi uint64) {
var carry, lo uint64
hi, lo = bits.Mul64(a, b)
_, carry = bits.Add64(lo, c, 0)
hi, _ = bits.Add64(hi, 0, carry)
return
}