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The design and architecture of a quantum instruction set are paramount to theperformance of a quantum computer. This work introduces a gate scheme forqubits with $XX+YY$ coupling that directly and efficiently realizes anytwo-qubit gate up to single-qubit gates. First, this scheme enableshigh-fidelity execution of quantum operations, especially when decoherence isthe primary error source. Second, since the scheme spans the entire$\textbf{SU}(4)$ group of two-qubit gates, we can use it to attain the optimaltwo-qubit gate count for algorithm implementation. These two advantages insynergy give rise to a quantum Complex yet Reduced Instruction Set Computer(CRISC). Though the gate scheme is compact, it supports a comprehensive arrayof quantum operations. This may seem paradoxical but is realizable due to thefundamental differences between quantum and classical computer architectures.  Using our gate scheme, we observe marked improvements across variousapplications, including generic $n$-qubit gate synthesis, quantum volume, andqubit routing. Furthermore, the proposed scheme also realizes a gate locallyequivalent to the commonly used CNOT gate with a gate time of $\frac{\pi}{2g}$,where $g$ is the two-qubit coupling. The AshN scheme is also completelyimpervious to $ZZ$ error, the main coherent error in transversely coupledsystems, as the control parameters implementing the gates can be easilyadjusted to take the $ZZ$ term into account.

One Gate Scheme to Rule Them All: Introducing a Complex Yet Reduced Instruction Set for Quantum Computing