From 6b6574dd8a741fdc6bd3962ba06d9caba341a23b Mon Sep 17 00:00:00 2001
From: Stephen Williams <steve@icarus.com>
Date: Sat, 15 Feb 2014 14:44:15 -0800
Subject: [PATCH] sizer support for simple LPM MUX devices.

---
 tgt-sizer/scan_lpms.cc | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tgt-sizer/scan_lpms.cc b/tgt-sizer/scan_lpms.cc
index 4d23a8f40..6298d1275 100644
--- a/tgt-sizer/scan_lpms.cc
+++ b/tgt-sizer/scan_lpms.cc
@@ -46,6 +46,21 @@ static void scans_lpms_add(ivl_scope_t, ivl_lpm_t lpm, struct sizer_statistics&s
       stats.gate_count += 2*wid;
 }
 
+/*
+ * Count mux devices as 2m gates.
+ */
+static void scan_lpms_mux(ivl_scope_t, ivl_lpm_t lpm, struct sizer_statistics&stats)
+{
+	// For now, don't generate statistics for wide mux devices.
+      if (ivl_lpm_size(lpm) > 2) {
+	    stats.lpm_bytype[ivl_lpm_type(lpm)] += 1;
+	    return;
+      }
+
+      unsigned wid = ivl_lpm_width(lpm);
+      stats.gate_count += 2*wid;
+}
+
 void scan_lpms(ivl_scope_t scope, struct sizer_statistics&stats)
 {
       for (unsigned idx = 0 ; idx < ivl_scope_lpms(scope) ; idx += 1) {
@@ -70,6 +85,10 @@ void scan_lpms(ivl_scope_t scope, struct sizer_statistics&stats)
 		  scan_lpms_ff(scope, lpm, stats);
 		  break;
 
+		case IVL_LPM_MUX:
+		  scan_lpms_mux(scope, lpm, stats);
+		  break;
+
 		default:
 		  stats.lpm_bytype[ivl_lpm_type(lpm)] += 1;
 		  break;