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- // +build amd64,!noasm
-
- package p503
-
- import (
- . "github.com/cloudflare/sidh/internal/isogeny"
- // This is imported only because arith_amd64.s needs
- // some symbols from cpuid.go
- _ "github.com/cloudflare/sidh/internal/utils"
- )
-
- // If choice = 0, leave x,y unchanged. If choice = 1, set x,y = y,x.
- // If choice is neither 0 nor 1 then behaviour is undefined.
- // This function executes in constant time.
- //go:noescape
- func fp503ConditionalSwap(x, y *FpElement, choice uint8)
-
- // Compute z = x + y (mod p).
- //go:noescape
- func fp503AddReduced(z, x, y *FpElement)
-
- // Compute z = x - y (mod p).
- //go:noescape
- func fp503SubReduced(z, x, y *FpElement)
-
- // Compute z = x + y, without reducing mod p.
- //go:noescape
- func fp503AddLazy(z, x, y *FpElement)
-
- // Compute z = x + y, without reducing mod p.
- //go:noescape
- func fp503X2AddLazy(z, x, y *FpElementX2)
-
- // Compute z = x - y, without reducing mod p.
- //go:noescape
- func fp503X2SubLazy(z, x, y *FpElementX2)
-
- // Reduce a field element in [0, 2*p) to one in [0,p).
- //go:noescape
- func fp503StrongReduce(x *FpElement)
-
- // Computes z = x * y.
- //go:noescape
- func fp503Mul(z *FpElementX2, x, y *FpElement)
-
- // Computes the Montgomery reduction z = x R^{-1} (mod 2*p). On return value
- // of x may be changed. z=x not allowed.
- //go:noescape
- func fp503MontgomeryReduce(z *FpElement, x *FpElementX2)
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