ParagonIE_Sodium_Core_Curve25519::fe_cmov( ParagonIE_Sodium_Core_Curve25519_Fe $f, ParagonIE_Sodium_Core_Curve25519_Fe $g, int $b = 0 ): ParagonIE_Sodium_Core_Curve25519_Fe

84    public static function fe_cmov(85        ParagonIE_Sodium_Core_Curve25519_Fe $f,86        ParagonIE_Sodium_Core_Curve25519_Fe $g,87        $b = 088    ) {89        $h = new ParagonIE_Sodium_Core_Curve25519_Fe();90        $b *= -1;91        $x = (($f->e0 ^ $g->e0) & $b); $h->e0 = $f->e0 ^ $x;92        $x = (($f->e1 ^ $g->e1) & $b); $h->e1 = $f->e1 ^ $x;93        $x = (($f->e2 ^ $g->e2) & $b); $h->e2 = $f->e2 ^ $x;94        $x = (($f->e3 ^ $g->e3) & $b); $h->e3 = $f->e3 ^ $x;95        $x = (($f->e4 ^ $g->e4) & $b); $h->e4 = $f->e4 ^ $x;96        $x = (($f->e5 ^ $g->e5) & $b); $h->e5 = $f->e5 ^ $x;97        $x = (($f->e6 ^ $g->e6) & $b); $h->e6 = $f->e6 ^ $x;98        $x = (($f->e7 ^ $g->e7) & $b); $h->e7 = $f->e7 ^ $x;99        $x = (($f->e8 ^ $g->e8) & $b); $h->e8 = $f->e8 ^ $x;100        $x = (($f->e9 ^ $g->e9) & $b); $h->e9 = $f->e9 ^ $x;101        return $h;102    }