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using csr pseudo-instruction for easier csr access

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stnolting 2020-07-05 22:22:59 +02:00
parent 75d71a036c
commit fd16f64704
1 changed files with 2 additions and 2 deletions
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4
sw/lib/include/neorv32_cpu.h
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@ -64,7 +64,7 @@ inline uint32_t __attribute__ ((always_inline)) neorv32_cpu_csr_read(const int c
register uint32_t csr_data;
asm volatile ("csrrw %[result], %[input_i], zero" : [result] "=r" (csr_data) : [input_i] "i" (csr_id));
asm volatile ("csrr %[result], %[input_i]" : [result] "=r" (csr_data) : [input_i] "i" (csr_id));
return csr_data;
}
@ -80,7 +80,7 @@ inline void __attribute__ ((always_inline)) neorv32_cpu_csr_write(const int csr_
register uint32_t csr_data = data;
asm volatile ("csrrw zero, %[input_i], %[input_j]" : : [input_i] "i" (csr_id), [input_j] "r" (csr_data));
asm volatile ("csrw %[input_i], %[input_j]" : : [input_i] "i" (csr_id), [input_j] "r" (csr_data));
}
#endif // neorv32_cpu_h