adds information for debugging

src/iss/arch/tgc5c.h

@@ -76,7 +76,53 @@ template <> struct traits<tgc5c> {
 
     static constexpr std::array<const uint32_t, 43> reg_byte_offsets{
         {0,4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124,128,132,136,137,141,145,149,157,165,173,177}};
+/*
+For easy lookup:
+X0         (zero): 0x0000
+X1         (ra)  : 0x0004
+X2         (sp)  : 0x0008
+X3         (gp)  : 0x000c
+X4         (tp)  : 0x0010
+X5         (t0)  : 0x0014
+X6         (t1)  : 0x0018
+X7         (t2)  : 0x001c
+X8         (s0/fp): 0x0020
+X9         (s1)  : 0x0024
+X10        (a0)  : 0x0028
+X11        (a1)  : 0x002c
+X12        (a2)  : 0x0030
+X13        (a3)  : 0x0034
+X14        (a4)  : 0x0038
+X15        (a5)  : 0x003c
+X16        (a6)  : 0x0040
+X17        (a7)  : 0x0044
+X18        (s2)  : 0x0048
+X19        (s3)  : 0x004c
+X20        (s4)  : 0x0050
+X21        (s5)  : 0x0054
+X22        (s6)  : 0x0058
+X23        (s7)  : 0x005c
+X24        (s8)  : 0x0060
+X25        (s9)  : 0x0064
+X26        (s10) : 0x0068
+X27        (s11) : 0x006c
+X28        (t3)  : 0x0070
+X29        (t4)  : 0x0074
+X30        (t5)  : 0x0078
+X31        (t6)  : 0x007c
+PC               : 0x0080
+NEXT_PC          : 0x0084
+PRIV             : 0x0085
+DPC              : 0x0089
+trap_state       : 0x008d
+pending_trap     : 0x0091
+icount           : 0x0095
+cycle            : 0x009d
+instret          : 0x00a5
+instruction      : 0x00ad
+last_branch      : 0x00b1
 
+*/
     static const uint64_t addr_mask = (reg_t(1) << (XLEN - 1)) | ((reg_t(1) << (XLEN - 1)) - 1);
 
     enum sreg_flag_e { FLAGS };