From bddd641290d3c01d86144362cd0e16c82e0bcfd8 Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Thu, 18 Jul 2019 21:03:54 -0700 Subject: [PATCH] Fix SB_MAC sim model -- do not sign extend internal products? --- techlibs/ice40/cells_sim.v | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v index 609facc93..4402f8d36 100644 --- a/techlibs/ice40/cells_sim.v +++ b/techlibs/ice40/cells_sim.v @@ -1363,9 +1363,9 @@ module SB_MAC16 ( wire [15:0] p_Ah_Bh, p_Al_Bh, p_Ah_Bl, p_Al_Bl; wire [15:0] Ah, Al, Bh, Bl; assign Ah = {A_SIGNED ? {8{iA[15]}} : 8'b0, iA[15: 8]}; - assign Al = {A_SIGNED ? {8{iA[ 7]}} : 8'b0, iA[ 7: 0]}; + assign Al = {A_SIGNED && MODE_8x8 ? {8{iA[ 7]}} : 8'b0, iA[ 7: 0]}; assign Bh = {B_SIGNED ? {8{iB[15]}} : 8'b0, iB[15: 8]}; - assign Bl = {B_SIGNED ? {8{iB[ 7]}} : 8'b0, iB[ 7: 0]}; + assign Bl = {B_SIGNED && MODE_8x8 ? {8{iB[ 7]}} : 8'b0, iB[ 7: 0]}; assign p_Ah_Bh = Ah * Bh; assign p_Al_Bh = Al * Bh; assign p_Ah_Bl = Ah * Bl; -- 2.30.2