added jump always, match ISA

1 files changed, 10 insertions, 6 deletions

diff --git a/hdl/core/jump_ctl.py b/hdl/core/jump_ctl.py
index 94dd8f2..6f02afe 100644
--- a/hdl/core/jump_ctl.py
+++ b/hdl/core/jump_ctl.py
@@ -10,12 +10,13 @@ from hdl.config import NUM_RAND_TESTS
 
 @unique
 class JumpOpCodes(Enum):
-    j_eq = 0
-    j_ne = 1
-    j_lt_u = 2
-    j_lte_u = 3
-    j_lt_s = 4
-    j_lte_s = 5
+    j_t = 0
+    j_eq = 1
+    j_ne = 2
+    j_lt_u = 3
+    j_lte_u = 4
+    j_lt_s = 5
+    j_lte_s = 6
 
 class JumpCtl(Elaboratable):
     def __init__(self, **kargs):
@@ -48,6 +49,9 @@ class JumpCtl(Elaboratable):
         # e.g.  in1 less than in2
         # this is done by in1 - in2 and reading the negative and zero flags
         with m.Switch(self.op):
+            with m.Case(JumpOpCodes.j_t.value):
+                m.d.comb += self.cond_true.eq(1)    # always true
+
             with m.Case(JumpOpCodes.j_eq.value):
                 m.d.comb += self.cond_true.eq(self.alu_flags[ALUFlags.zero.value])