[HGEMM] HEGMM kernel with double buffers (#57)

* Update hgemm.cu

* Update hgemm.py

* Update README.md

* Update README.md

Author: DefTruth

README.md

@@ -105,6 +105,7 @@
 | ✔️ [hgemm_t_8x8_sliced_k_f16x4_pack](./hgemm/hgemm.cu)|f16|f16|[link](./hgemm/)|⭐️⭐️⭐️|  
 | ✔️ [hgemm_t_8x8_sliced_k_f16x8_pack](./hgemm/hgemm.cu)|f16|f16|[link](./hgemm/)|⭐️⭐️⭐️|  
 | ✔️ [hgemm_t_8x8_sliced_k_..._bcf](./hgemm/hgemm.cu)|f16|f16|[link](./hgemm/)|⭐️⭐️⭐️|  
+| ✔️ [hgemm_t_8x8_sliced_k_..._dbuf](./hgemm/hgemm.cu)|f16|f16|[link](./hgemm/)|⭐️⭐️⭐️|  
 | ✔️ [sgemv_k32_f32](./sgemv/sgemv.cu)|f32|f32|[link](./sgemv/)|⭐️⭐️⭐️|  
 | ✔️ [sgemv_k128_f32x4](./sgemv/sgemv.cu)|f32|f32|[link](./sgemv/)|⭐️⭐️⭐️|  
 | ✔️ [sgemv_k16_f32](./sgemv/sgemv.cu)|f32|f32|[link](./sgemv/)|⭐️⭐️⭐️|