Memory: Fix FSM for LDR/STR. Fix pre/post increment to be, uh, pre/post increment...

[firearm.git] / Issue.v

diff --git a/Issue.v b/Issue.v
index 3c8303a475c17e56134d0d206c55d9a8ea784ad7..7b281a30016d8dc0254a3207678ae3b895a86a04 100644 (file)
--- a/Issue.v
+++ b/Issue.v
@@ -282,7 +282,7 @@ module Issue(
                waiting_cpsr = use_cpsr & (cpsr_inflight[0] | cpsr_inflight[1]);
                waiting_regs = |(use_regs & (regs_inflight[0] | regs_inflight[1]));
                
-               outstall = (waiting && !inbubble) || stall;     /* Happens in an always @*, because it is an exception. */
+               outstall = ((waiting && !inbubble) || stall) && !flush; /* Happens in an always @*, because it is an exception. */
        end
        
        /* Actually do the issue. */
@@ -290,8 +290,16 @@ module Issue(
        begin
                if (waiting)
                        $display("ISSUE: Stalling instruction %08x because %d/%d", insn, waiting_cpsr, waiting_regs);
-       
-               if (!stall)
+
+               if(flush)
+               begin
+                       cpsr_inflight[0] = 1'b0;
+                       cpsr_inflight[1] = 1'b0;
+                       regs_inflight[0] = 16'b0;
+                       regs_inflight[1] = 16'b0;
+                       outbubble <= 1'b1;
+               end
+               else if (!stall)
                begin
                        cpsr_inflight[0] <= cpsr_inflight[1];   /* I'm not sure how well selects work with arrays, and that seems like a dumb thing to get anusulated by. */
                        cpsr_inflight[1] <= (waiting || inbubble || !condition_met) ? 0 : def_cpsr;