fix(vfalu): fix bug of allFFlagsEn when lastUop is reduction unorder …

…sum (#4244)
OpenXiangShan · Feb 6, 2025 · f5217f4 · f5217f4
1 parent 977ac3b
commit f5217f4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/main/scala/xiangshan/backend/fu/wrapper/VFALU.scala b/src/main/scala/xiangshan/backend/fu/wrapper/VFALU.scala
@@ -407,7 +407,7 @@ class VFAlu(cfg: FuConfig)(implicit p: Parameters) extends VecPipedFuncUnit(cfg)
     dontTouch(allFFlagsEn)
     dontTouch(fflagsRedMask)
   }
-  allFFlagsEn := Mux(outIsResuction, Cat(Fill(4*numVecModule - 1, firstNeedFFlags || outIsVfRedUnSum) & fflagsRedMask(4*numVecModule - 1, 1),
+  allFFlagsEn := Mux(outIsResuction, Cat(Fill(4*numVecModule - 1, firstNeedFFlags || outIsVfRedUnSum && !outVecCtrl.lastUop) & fflagsRedMask(4*numVecModule - 1, 1),
     lastNeedFFlags || firstNeedFFlags || outIsVfRedOrdered || outIsVfRedUnSum), fflagsEn & vlMaskEn).asTypeOf(allFFlagsEn)
 
   val allFFlags = fflagsData.asTypeOf(Vec( 4*numVecModule,UInt(5.W)))