From 3172a38daeb4588d3aaa686816c09d64ccf08587 Mon Sep 17 00:00:00 2001
From: YRabbit <rabbit@yrabbit.cyou>
Date: Mon, 4 Jul 2022 10:32:39 +1000
Subject: gowin: Let the placer know about global networks

Refactor in order to detect networks that will be routed in a special
mode earlier. This makes it possible to mark the source of such networks
as a global buffer, thereby removing their influence on element
placement.

In addition, timing classes are set for some cells.

Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
---
 gowin/pack.cc | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'gowin/pack.cc')

diff --git a/gowin/pack.cc b/gowin/pack.cc
index 83820142..5b304f10 100644
--- a/gowin/pack.cc
+++ b/gowin/pack.cc
@@ -26,6 +26,8 @@
 #include "log.h"
 #include "util.h"
 
+#include "globals.h"
+
 NEXTPNR_NAMESPACE_BEGIN
 
 static void make_dummy_alu(Context *ctx, int alu_idx, CellInfo *ci, CellInfo *packed_head,
@@ -1009,6 +1011,7 @@ bool Arch::pack()
     Context *ctx = getCtx();
     try {
         log_break();
+        pre_pack(ctx);
         pack_constants(ctx);
         pack_gsr(ctx);
         pack_io(ctx);
@@ -1018,6 +1021,7 @@ bool Arch::pack()
         pack_alus(ctx);
         pack_lut_lutffs(ctx);
         pack_nonlut_ffs(ctx);
+        post_pack(ctx);
         ctx->settings[id_pack] = 1;
         ctx->assignArchInfo();
         log_info("Checksum: 0x%08x\n", ctx->checksum());
-- 
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