[xcc, sim] replaced ble/bleu with bge/bgeu

This will simplify control logic (since every branch has a logical inverse)

riscv/execute.h

@@ -438,24 +438,24 @@ switch((insn.bits >> 0x19) & 0x7f)
         #include "insns/bne.h"
         break;
       }
-      case 0x2:
+      case 0x4:
       {
         #include "insns/blt.h"
         break;
       }
-      case 0x3:
+      case 0x5:
       {
-        #include "insns/bltu.h"
+        #include "insns/bge.h"
         break;
       }
-      case 0x4:
+      case 0x6:
       {
-        #include "insns/ble.h"
+        #include "insns/bltu.h"
         break;
       }
-      case 0x5:
+      case 0x7:
       {
-        #include "insns/bleu.h"
+        #include "insns/bgeu.h"
         break;
       }
       default:

riscv/insns/bge.h

@@ -0,0 +1,2 @@
+if(sreg_t(cmp_trunc(RA)) >= sreg_t(cmp_trunc(RB)))
+  npc = BRANCH_TARGET;

riscv/insns/bgeu.h

@@ -0,0 +1,2 @@
+if(cmp_trunc(RA) >= cmp_trunc(RB))
+  npc = BRANCH_TARGET;

riscv/insns/ble.h

@@ -1,2 +0,0 @@
-if(sreg_t(cmp_trunc(RA)) <= sreg_t(cmp_trunc(RB)))
-  npc = BRANCH_TARGET;

riscv/insns/bleu.h

@@ -1,2 +0,0 @@
-if(cmp_trunc(RA) <= cmp_trunc(RB))
-  npc = BRANCH_TARGET;