}

    @Override
    public boolean containsKey(final Object key) {
        final Entry<K, V>[] tbl = mapTable;
        if (key != null) {
            final int hashCode = key.hashCode();
            final int index = (hashCode & 0x7FFFFFFF) % tbl.length;
            for (Entry<K, V> e = tbl[index]; e != null; e = e.next) {
                if (e.hashCode == hashCode && key.equals(e.key)) {

		return true
	}
	// LDADDx/SWPx/CASx atomic instructions
	return arm64.IsAtomicInstruction(op)
}

// IsARM64TBL reports whether the op (as defined by an arm64.A*
// constant) is one of the TBL-like instructions and one of its
// inputs does not fit into prog.Reg, so require special handling.
func IsARM64TBL(op obj.As) bool {
	switch op {
	case arm64.AVTBL, arm64.AVTBX, arm64.AVMOVQ:
		return true
	}

MOVD $0x0e0, R_x0e0 MOVD $0x0f0, R_x0f0 MOVD $0x100, R_x100 MOVD $0x110, R_x110 loop: MOVD TBL_STRT, TBL LVX (TBL)(R_x000), KI LXVD2X (INP)(R_x000), V8 // load v8 in advance // Offload to VSR24-31 (aka FPR24-31) XXLOR V0, V0, VS24 XXLOR V1, V1, VS25 XXLOR V2, V2, VS26 XXLOR V3, V3, VS27 XXLOR V4, V4, VS28 XXLOR V5, V5, VS29 XXLOR V6, V6, VS30 XXLOR V7, V7, VS31 VADDUWM KI, V7, V7 // h+K[i] LVX (TBL)(R_x010), KI VPERMLE(V8, V8, LEMASK, V8) SHA256ROUND0(V0, V1, V2, V3, V4, V5, V6, V7, V8, R_x020) VSLDOI...

MOVD $0x0e0, R_x0e0 MOVD $0x0f0, R_x0f0 MOVD $0x100, R_x100 MOVD $0x110, R_x110 loop: MOVD TBL_STRT, TBL LVX (TBL)(R_x000), KI LXVD2X (INP)(R_x000), V8 // load v8 in advance // Offload to VSR24-31 (aka FPR24-31) XXLOR V0, V0, VS24 XXLOR V1, V1, VS25 XXLOR V2, V2, VS26 XXLOR V3, V3, VS27 XXLOR V4, V4, VS28 XXLOR V5, V5, VS29 XXLOR V6, V6, VS30 XXLOR V7, V7, VS31 VADDUWM KI, V7, V7 // h+K[i] LVX (TBL)(R_x010), KI VPERMLE(V8, V8, LEMASK, V8) SHA256ROUND0(V0, V1, V2, V3, V4, V5, V6, V7, V8, R_x020) VSLDOI...