From d51d93a3a8f479d09e23513eff86222eca1e8ee1 Mon Sep 17 00:00:00 2001 From: David Harris Date: Thu, 2 Mar 2023 20:00:47 -0800 Subject: [PATCH] Refactored Floating point division special case detection to avoid spurious trigger on Y for sqrt) --- src/fpu/fdivsqrt/fdivsqrtfsm.sv | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/fpu/fdivsqrt/fdivsqrtfsm.sv b/src/fpu/fdivsqrt/fdivsqrtfsm.sv index 81f6a5ee..da13813f 100644 --- a/src/fpu/fdivsqrt/fdivsqrtfsm.sv +++ b/src/fpu/fdivsqrt/fdivsqrtfsm.sv @@ -60,9 +60,9 @@ module fdivsqrtfsm( assign IFDivStartE = (FDivStartE | (IDivStartE & `IDIV_ON_FPU)) & (state == IDLE) & ~StallM; assign FDivDoneE = (state == DONE); assign FDivBusyE = (state == BUSY) | IFDivStartE; - + // terminate immediately on special cases - assign FSpecialCaseE = XZeroE | (YZeroE&~SqrtE) | XInfE | YInfE | XNaNE | YNaNE | (XsE&SqrtE); + assign FSpecialCaseE = XZeroE | | XInfE | XNaNE | (XsE&SqrtE) | (YZeroE | YInfE | YNaNE)&~SqrtE; if (`IDIV_ON_FPU) assign SpecialCaseE = IntDivE ? ISpecialCaseE : FSpecialCaseE; else assign SpecialCaseE = FSpecialCaseE; flopenr #(1) SpecialCaseReg(clk, reset, IFDivStartE, SpecialCaseE, SpecialCaseM); // save SpecialCase for checking in fdivsqrtpostproc