From 5ba3a382f105b9b00bb1cd18d2723c26e7de30d6 Mon Sep 17 00:00:00 2001
From: Rahul Kumar <rahulkumar@berkeley.edu>
Date: Mon, 14 Oct 2024 18:10:08 -0700
Subject: [PATCH] increase cap factor

---
 src/blocks/decoder/mod.rs | 2 +-
 src/blocks/sram/mod.rs    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/blocks/decoder/mod.rs b/src/blocks/decoder/mod.rs
index 7b6d68fe..3caf63a4 100644
--- a/src/blocks/decoder/mod.rs
+++ b/src/blocks/decoder/mod.rs
@@ -68,7 +68,7 @@ struct PlanTreeNode {
 impl DecoderTree {
     pub fn new(bits: usize, cload: f64) -> Self {
         let plan = plan_decoder(bits, true, false);
-        let stages = (cload / INV_MODEL.cin * plan.le_b()).log(3.).ceil() as usize;
+        let stages = (cload / INV_MODEL.cin * plan.le_b()).log(4.).ceil() as usize;
         let depth = plan.min_depth();
         println!("target num stages = {stages}, current min num stages = {depth}");
         let plan = if stages > depth {
diff --git a/src/blocks/sram/mod.rs b/src/blocks/sram/mod.rs
index a1734bdb..7d152785 100644
--- a/src/blocks/sram/mod.rs
+++ b/src/blocks/sram/mod.rs
@@ -215,7 +215,7 @@ impl Script for SramPhysicalDesignScript {
         params: &Self::Params,
         ctx: &substrate::data::SubstrateCtx,
     ) -> substrate::error::Result<Self::Output> {
-        let wl_cap = (params.cols() + 4) as f64 * WORDLINE_CAP_PER_CELL * 1.5; // Safety factor.
+        let wl_cap = (params.cols() + 4) as f64 * WORDLINE_CAP_PER_CELL * 2.; // Safety factor.
         let col_params = params.col_params();
         let cols = ctx.instantiate_layout::<ColPeripherals>(&col_params)?;
         let rbl_rows = ((params.rows() / 12) + 1) * 2;