183 #define write_fpu(reg, val) ({ \  argument
184   if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
185     __asm__ volatile ("fmv.w.x " #reg ", %0" :: "i"(val)); \
187     __asm__ volatile ("fmv.w.x " #reg ", %0" :: "r"(val)); })
194 #define write_csr(reg, val) ({ \  argument
195   if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
196     __asm__ volatile ("csrw " #reg ", %0" :: "i"(val)); \
198     __asm__ volatile ("csrw " #reg ", %0" :: "r"(val)); })
200 #define swap_csr(reg, val) ({ unsigned long __tmp; \  argument
201   if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
202     __asm__ volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "i"(val)); \
204     __asm__ volatile ("csrrw %0, " #reg ", %1" : "=r"(__tmp) : "r"(val)); \