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47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
// +build amd64,!noasm arm64,!noasm
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package p751
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import (
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. "v2ray.com/core/external/github.com/cloudflare/sidh/internal/isogeny"
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)
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// If choice = 0, leave x,y unchanged. If choice = 1, set x,y = y,x.
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// If choice is neither 0 nor 1 then behaviour is undefined.
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// This function executes in constant time.
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//go:noescape
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func fp751ConditionalSwap(x, y *FpElement, choice uint8)
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// Compute z = x + y (mod p).
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//go:noescape
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func fp751AddReduced(z, x, y *FpElement)
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// Compute z = x - y (mod p).
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//go:noescape
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func fp751SubReduced(z, x, y *FpElement)
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// Compute z = x + y, without reducing mod p.
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//go:noescape
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func fp751AddLazy(z, x, y *FpElement)
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// Compute z = x + y, without reducing mod p.
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//go:noescape
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func fp751X2AddLazy(z, x, y *FpElementX2)
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// Compute z = x - y, without reducing mod p.
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//go:noescape
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func fp751X2SubLazy(z, x, y *FpElementX2)
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// Compute z = x * y.
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//go:noescape
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func fp751Mul(z *FpElementX2, x, y *FpElement)
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// Compute Montgomery reduction: set z = x * R^{-1} (mod 2*p).
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// It may destroy the input value.
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//go:noescape
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func fp751MontgomeryReduce(z *FpElement, x *FpElementX2)
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// Reduce a field element in [0, 2*p) to one in [0,p).
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//go:noescape
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func fp751StrongReduce(x *FpElement)
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