648   fe trY, trZ, trT;  in ge_madd()  local
653   fe_mul_tll(&trY, &r->Y, &q->yminusx);  in ge_madd()
656   fe_sub(&r->X, &trZ, &trY);  in ge_madd()
657   fe_add(&r->Y, &trZ, &trY);  in ge_madd()
665   fe trY, trZ, trT;  in ge_msub()  local
670   fe_mul_tll(&trY, &r->Y, &q->yplusx);  in ge_msub()
673   fe_sub(&r->X, &trZ, &trY);  in ge_msub()
674   fe_add(&r->Y, &trZ, &trY);  in ge_msub()
682   fe trX, trY, trZ, trT;  in x25519_ge_add()  local
687   fe_mul_tll(&trY, &r->Y, &q->YminusX);  in x25519_ge_add()
691   fe_sub(&r->X, &trZ, &trY);  in x25519_ge_add()
692   fe_add(&r->Y, &trZ, &trY);  in x25519_ge_add()
700   fe trX, trY, trZ, trT;  in x25519_ge_sub()  local
705   fe_mul_tll(&trY, &r->Y, &q->YplusX);  in x25519_ge_sub()
709   fe_sub(&r->X, &trZ, &trY);  in x25519_ge_sub()
710   fe_add(&r->Y, &trZ, &trY);  in x25519_ge_sub()