add 'je' and 'jne' instrs

Author: vytdev

impl.h

@@ -248,4 +248,20 @@ DEF(loop) {
   vmnext;
 }
 
+DEF(je) {
+  if (hasf(RVM_FEQ)) {
+    pc += imm23s;
+    util_checkpc();
+  }
+  vmnext;
+}
+
+DEF(jne) {
+  if (!hasf(RVM_FEQ)) {
+    pc += imm23s;
+    util_checkpc();
+  }
+  vmnext;
+}
+
 #endif /* impl.h */

opcodes.h

@@ -57,5 +57,7 @@ DEF(swp,    35)   /* [I] rgA, rgB = rgB, rgA */
 DEF(adr,    36)   /* [M] rgA = pc + imm19s */
 DEF(jr,     37)   /* [M] pc = rgA */
 DEF(loop,   38)   /* [M] if (rgA-- != 0) pc += imm19s */
+DEF(je,     39)   /* [J] jump if eq */
+DEF(jne,    40)   /* [J] jump if not-eq */
 
 #endif /* opcodes.h */

rvm.c

@@ -101,6 +101,10 @@ const char *rvm_stropc(int opc)
 #define imm23s  RVM_SGXTD(fnc & RVM_F23MASK, 23)
 #define imm23u  RVM_ZRXTD(fnc & RVM_F23MASK, 23)
 
+#define setf(v)  (cf |= (v))
+#define hasf(v)  ((cf & (v)) == (v))
+#define clrf()   (cf = 0)
+
 /* Saving vm state. */
 #if RVM_CFG_COUNT_INSTRS_EXEC
 #  define __RVM_SAVEICNT()   (ctx->inst_cnt = icnt)