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33 lines
826 B
33 lines
826 B
package sha512
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import (
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"github.com/consensys/gnark/frontend"
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)
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func Maj_t512(api frontend.API, a, b, c [] frontend.Variable) ([] frontend.Variable) {
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n := len(a)
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if len(a) != n { panic("bad length") }
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if len(b) != n { panic("bad length") }
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if len(c) != n { panic("bad length") }
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mid := make([] frontend.Variable, n)
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out := make([] frontend.Variable, n)
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for k := 0; k < n; k++ {
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mid[k] = api.Mul(b[k], c[k])
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out[k] = api.Add(api.Mul(a[k], api.Sub(api.Add(b[k], c[k]), api.Mul(2, mid[k]))), mid[k])
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}
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return out
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}
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// template Maj_t512(n) {
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// signal input a[n];
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// signal input b[n];
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// signal input c[n];
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// signal output out[n];
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// signal mid[n];
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// for (var k=0; k<n; k++) {
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// mid[k] <== b[k]*c[k];
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// out[k] <== a[k] * (b[k]+c[k]-2*mid[k]) + mid[k];
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// }
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// }
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