some performance improvement

gost/cuda_gosthash.cu

@@ -724,7 +724,7 @@ void GOST_FS(uint64_t* const state64, uint64_t* return_state)
 #if (__CUDA_ARCH__ >= 500)
 		return_state[b] = __ldg (&T0[EXTRACT_BYTE(state32[14], b)])
 			^ __ldg (&T1[EXTRACT_BYTE(state32[12], b)])
-			^ __ldg (&T2[EXTRACT_BYTE(state32[10], b)])
+			^ T2S[EXTRACT_BYTE(state32[10], b)]
 			^ __ldg (&T3[EXTRACT_BYTE(state32[8], b)])
 			^ T4S[EXTRACT_BYTE(state32[6], b)]
 			^ T5S[EXTRACT_BYTE(state32[4], b)]
@@ -736,7 +736,7 @@ void GOST_FS(uint64_t* const state64, uint64_t* return_state)
 			^ T2S[EXTRACT_BYTE(state32[11], b)]
 			^ T3S[EXTRACT_BYTE(state32[9], b)]
 			^ __ldg (&T4[EXTRACT_BYTE(state32[7], b)])
-			^ __ldg (&T5[EXTRACT_BYTE(state32[5], b)])
+			^ T5S[EXTRACT_BYTE(state32[5], b)]
 			^ __ldg (&T6[EXTRACT_BYTE(state32[3], b)])
 			^ __ldg (&T7[EXTRACT_BYTE(state32[1], b)]);
 #else