adding texture test to tex_demo

runtime/include/vx_intrinsics.h

@@ -5,7 +5,52 @@
 
 #ifdef __cplusplus
 extern "C" {
+    
 #endif
+#ifdef __ASSEMBLY__
+#define __ASM_STR(x)	x
+#else
+#define __ASM_STR(x)	#x
+#endif
+
+#define vx_csr_swap(csr, val)	({              \
+	unsigned long __v = (unsigned long)(val);	\
+	__asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1" : "=r" (__v) : "rK" (__v) : "memory"); \
+	__v;						                \
+})
+
+#define vx_csr_read(csr)	({                  \
+	register unsigned long __v;				    \
+	__asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) : "=r" (__v) :: "memory"); \
+	__v;							            \
+})
+
+#define vx_csr_write(csr, val)	({              \
+	unsigned long __v = (unsigned long)(val);	\
+	__asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0"	:: "rK" (__v) : "memory");  \
+})
+
+#define vx_csr_read_set(csr, val)	({          \
+	unsigned long __v = (unsigned long)(val);   \
+	__asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1" : "=r" (__v) : "rK" (__v) : "memory"); \
+	__v;							            \
+})
+
+#define vx_csr_set(csr, val)	({              \
+	unsigned long __v = (unsigned long)(val);	\
+	__asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0"	:: "rK" (__v) : "memory");  \
+})
+
+#define vx_csr_read_clear(csr, val)	({          \
+	unsigned long __v = (unsigned long)(val);	\
+	__asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1" : "=r" (__v) : "rK" (__v) : "memory"); \
+	__v;							            \
+})
+
+#define vx_csr_clear(csr, val)	({              \
+	unsigned long __v = (unsigned long)(val);   \
+	__asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0"	:: "rK" (__v) : "memory"); \
+})
 
 // Set thread mask
 inline void vx_tmc(unsigned num_threads) {