Fix exception priority for RV32E loads and AMOs

Author: aswaterman

riscv/decode_macros.h

@@ -30,9 +30,9 @@
  * 4 : csr
  */
 #define WRITE_REG(reg, value) ({ \
+    CHECK_REG(reg); \
     reg_t wdata = (value); /* value may have side effects */ \
     if (DECODE_MACRO_USAGE_LOGGED) STATE.log_reg_write[(reg) << 4] = {wdata, 0}; \
-    CHECK_REG(reg); \
     STATE.XPR.write(reg, wdata); \
   })
 #define WRITE_FREG(reg, value) ({ \