Provide endian_flipX functions to avoid special casing big endian in cgminer.c

cgminer.c

@@ -1481,9 +1481,7 @@ static void calc_midstate(struct work *work)
 	sha2_starts(&ctx);
 	sha2_update(&ctx, data, 64);
 	memcpy(work->midstate, ctx.state, 32);
-#if defined(__BIG_ENDIAN__) || defined(MIPSEB)
+	endian_flip32(work->midstate, work->midstate);
-	flip32(work->midstate, work->midstate);
-#endif
 }
 
 static struct work *make_work(void)
@@ -2439,9 +2437,7 @@ static bool submit_upstream_work(struct work *work, CURL *curl, bool resubmit)
 
 	cgpu = get_thr_cgpu(thr_id);
 
-#ifdef __BIG_ENDIAN__
+	endian_flip128(work->data, work->data);
-	flip128(work->data, work->data);
-#endif
 
 	/* build hex string */
 	hexstr = bin2hex(work->data, sizeof(work->data));

miner.h

@@ -670,6 +670,29 @@ static inline void flip128(void *dest_p, const void *src_p)
 		dest[i] = swab32(src[i]);
 }
 
+/* For flipping to the correct endianness if necessary */
+#if defined(__BIG_ENDIAN__) || defined(MIPSEB)
+static inline void endian_flip32(void *dest_p, const void *src_p)
+{
+	flip32(dest_p, src_p);
+}
+
+static inline void endian_flip128(void *dest_p, const void *src_p)
+{
+	flip128(dest_p, src_p);
+}
+#else
+static inline void
+endian_flip32(void __maybe_unused *dest_p, const void __maybe_unused *src_p)
+{
+}
+
+static inline void
+endian_flip128(void __maybe_unused *dest_p, const void __maybe_unused *src_p)
+{
+}
+#endif
+
 extern void quit(int status, const char *format, ...);
 
 static inline void mutex_lock(pthread_mutex_t *lock)