Fix exception priority for RV32E JAL/JALR

Author: aswaterman

riscv/decode_macros.h

@@ -22,6 +22,7 @@
 #define RS2 READ_REG(insn.rs2())
 #define RS3 READ_REG(insn.rs3())
 #define WRITE_RD(value) WRITE_REG(insn.rd(), value)
+#define CHECK_RD() CHECK_REG(insn.rd())
 
 /* 0 : int
  * 1 : floating

riscv/insns/jal.h

@@ -1,3 +1,4 @@
+CHECK_RD();
 reg_t tmp = npc;
 set_pc(JUMP_TARGET);
 WRITE_RD(tmp);

riscv/insns/jalr.h

@@ -1,3 +1,4 @@
+CHECK_RD();
 reg_t tmp = npc;
 set_pc((RS1 + insn.i_imm()) & ~reg_t(1));
 WRITE_RD(tmp);