[hardware] 🐛 Let subsequent vfdiv/vfsqrt execute

pulp-platform · Jun 27, 2024 · b533bdf · b533bdf
1 parent aa49c53
commit b533bdf
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/hardware/src/lane/vmfpu.sv b/hardware/src/lane/vmfpu.sv
@@ -1316,9 +1316,11 @@ module vmfpu import ara_pkg::*; import rvv_pkg::*; import fpnew_pkg::*;
     // issue only if the new instruction is slower than the previous one.
     // VFDIV-like instructions have variable latency, so stall them not to create
     // problems.
-    latency_problem_d = (vinsn_issue_lat_d < vinsn_processing_lat_d)           ||
-                        (vinsn_issue_d.op      inside {VFDIV, VFRDIV, VFSQRT}) ||
-                        (vinsn_processing_d.op inside {VFDIV, VFRDIV, VFSQRT});
+    latency_problem_d = (vinsn_issue_lat_d < vinsn_processing_lat_d)            ||
+                        (((vinsn_issue_d.op    inside {VFDIV, VFRDIV, VFSQRT})  ||
+                        (vinsn_processing_d.op inside {VFDIV, VFRDIV, VFSQRT})) &&
+                        vinsn_issue_d.id != vinsn_processing_d.id);
+
     latency_stall     = vinsn_issue_q_valid & vinsn_processing_q_valid & latency_problem_q;
 
     operand_a = (vinsn_issue_q.op == VFRDIV) ? scalar_op : mfpu_operand_i[1]; // vs2