From d16f87b99018bd8d56aa13b02447ed2c9968ee86 Mon Sep 17 00:00:00 2001
From: Steven Hugg <hugg@fasterlight.com>
Date: Wed, 13 Nov 2019 19:32:20 -0600
Subject: [PATCH] fixed waveform bug; added VL_DIVS_III

---
 src/ide/waveform.ts     |  3 ++-
 src/platform/verilog.ts | 11 ++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/ide/waveform.ts b/src/ide/waveform.ts
index df8587d2..631236bb 100644
--- a/src/ide/waveform.ts
+++ b/src/ide/waveform.ts
@@ -69,7 +69,8 @@ export class WaveformView {
       itemHeight: rowHeight,
       totalRows: this.meta.length,
       generatorFn: (row : number) => {
-        var s = this.meta[row].label;
+        var metarow = this.meta[row]; // TODO: why null?
+        var s = metarow != null ? metarow.label : "";
         var linediv = document.createElement("div");
         var canvas = document.createElement("canvas");
         canvas.width = width - 12;
diff --git a/src/platform/verilog.ts b/src/platform/verilog.ts
index ca0eeb55..ca9dad73 100644
--- a/src/platform/verilog.ts
+++ b/src/platform/verilog.ts
@@ -100,8 +100,17 @@ export function VL_DIV_III(lbits,lhs,rhs) {
 export function VL_MODDIV_III(lbits,lhs,rhs) {
     return (((rhs)==0)?0:(lhs)%(rhs)); }
 
+export function VL_DIVS_III(lbits,lhs,rhs) {
+  var lhs_signed = VL_EXTENDS_II(32, lbits, lhs);
+  var  rhs_signed = VL_EXTENDS_II(32, lbits, rhs);
+  return (((rhs_signed)==0)?0:(lhs_signed)/(rhs_signed));
+}
+
 export function VL_MODDIVS_III(lbits,lhs,rhs) {
-    return (((rhs)==0)?0:(lhs)%(rhs)); }
+  var lhs_signed = VL_EXTENDS_II(32, lbits, lhs);
+  var  rhs_signed = VL_EXTENDS_II(32, lbits, rhs);
+  return (((rhs_signed)==0)?0:(lhs_signed)%(rhs_signed));
+}
 
 export function VL_REDXOR_32(r) {
     r=(r^(r>>1)); r=(r^(r>>2)); r=(r^(r>>4)); r=(r^(r>>8)); r=(r^(r>>16));