tridoracpu: experimented with synthesis options again

- workaround for an apparent bug with LOAD address
  generation at offsets >= 3584
- updated bitstream URL

README.md

@@ -81,7 +81,7 @@ on the emulator image.
 - the [Hackaday project](https://hackaday.io/project/198324-tridora-cpu) (mostly copy-paste from this README)
 - the [YouTube channel](https://www.youtube.com/@tridoracpu/videos) with some demo videos
 - the [emulator](https://git.insignificance.de/slederer/-/packages/generic/tridoraemu/0.0.5/files/12) (source and windows binary)
-- the [FPGA bitstream](https://git.insignificance.de/slederer/-/packages/generic/tdr-bitstream/0.0.3/files/15) for the Arty-A7-35T board
+- the [FPGA bitstream](https://git.insignificance.de/slederer/-/packages/generic/tdr-bitstream/0.0.4/files/16) for the Arty-A7-35T board
 - an [SD-card image](https://git.insignificance.de/slederer/-/packages/generic/tdr-cardimage/0.0.4/files/13)
 
 Contact the author here: tridoracpu [at] insignificance.de

tridoracpu/tridoracpu.xpr

@@ -356,12 +356,15 @@
     </Simulator>
   </Simulators>
   <Runs Version="1" Minor="22">
-    <Run Id="synth_1" Type="Ft3:Synth" SrcSet="sources_1" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Vivado Synthesis Defaults" AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/synth_1" IncludeInArchive="true" IsChild="false" AutoIncrementalDir="$PSRCDIR/utils_1/imports/synth_1" AutoRQSDir="$PSRCDIR/utils_1/imports/synth_1" ParallelReportGen="true">
+    <Run Id="synth_1" Type="Ft3:Synth" SrcSet="sources_1" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Performs general area optimizations including changing the threshold for control set optimizations, forcing ternary adder implementation, applying lower thresholds for use of carry chain in comparators and also area optimized mux optimizations." AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/synth_1" IncludeInArchive="true" IsChild="false" AutoIncrementalDir="$PSRCDIR/utils_1/imports/synth_1" AutoRQSDir="$PSRCDIR/utils_1/imports/synth_1" ParallelReportGen="true">
       <Strategy Version="1" Minor="2">
-        <StratHandle Name="Vivado Synthesis Defaults" Flow="Vivado Synthesis 2024">
+        <StratHandle Name="Flow_AreaOptimized_high" Flow="Vivado Synthesis 2024">
-          <Desc>Vivado Synthesis Defaults</Desc>
+          <Desc>Performs general area optimizations including changing the threshold for control set optimizations, forcing ternary adder implementation, applying lower thresholds for use of carry chain in comparators and also area optimized mux optimizations.</Desc>
         </StratHandle>
-        <Step Id="synth_design"/>
+        <Step Id="synth_design">
+          <Option Id="ControlSetOptThreshold">1</Option>
+          <Option Id="Directive">1</Option>
+        </Step>
       </Strategy>
       <GeneratedRun Dir="$PRUNDIR" File="gen_run.xml"/>
       <ReportStrategy Name="Vivado Synthesis Default Reports" Flow="Vivado Synthesis 2024"/>
@@ -378,14 +381,14 @@
       <Report Name="ROUTE_DESIGN.REPORT_METHODOLOGY" Enabled="1"/>
       <RQSFiles/>
     </Run>
-    <Run Id="impl_1" Type="Ft2:EntireDesign" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Similar to Performance_ExplorePostRoutePhysOpt, but enables logic optimization step (opt_design) with the ExploreWithRemap directive." AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/impl_1" SynthRun="synth_1" IncludeInArchive="true" IsChild="false" GenFullBitstream="true" AutoIncrementalDir="$PSRCDIR/utils_1/imports/impl_1" LaunchOptions="-jobs 6 " AutoRQSDir="$PSRCDIR/utils_1/imports/impl_1" ParallelReportGen="true">
+    <Run Id="impl_1" Type="Ft2:EntireDesign" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Uses multiple algorithms for optimization, placement, and routing to get potentially better results." AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/impl_1" SynthRun="synth_1" IncludeInArchive="true" IsChild="false" GenFullBitstream="true" AutoIncrementalDir="$PSRCDIR/utils_1/imports/impl_1" LaunchOptions="-jobs 6 " AutoRQSDir="$PSRCDIR/utils_1/imports/impl_1" ParallelReportGen="true">
       <Strategy Version="1" Minor="2">
-        <StratHandle Name="Performance_ExploreWithRemap" Flow="Vivado Implementation 2024">
+        <StratHandle Name="Performance_Explore" Flow="Vivado Implementation 2024">
-          <Desc>Similar to Performance_ExplorePostRoutePhysOpt, but enables logic optimization step (opt_design) with the ExploreWithRemap directive.</Desc>
+          <Desc>Uses multiple algorithms for optimization, placement, and routing to get potentially better results.</Desc>
         </StratHandle>
         <Step Id="init_design"/>
         <Step Id="opt_design">
-          <Option Id="Directive">6</Option>
+          <Option Id="Directive">0</Option>
         </Step>
         <Step Id="power_opt_design"/>
         <Step Id="place_design">
@@ -396,12 +399,9 @@
           <Option Id="Directive">0</Option>
         </Step>
         <Step Id="route_design">
-          <Option Id="Directive">1</Option>
-          <Option Id="MoreOptsStr"><![CDATA[-tns_cleanup]]></Option>
-        </Step>
-        <Step Id="post_route_phys_opt_design" EnableStepBool="1">
           <Option Id="Directive">0</Option>
         </Step>
+        <Step Id="post_route_phys_opt_design"/>
         <Step Id="write_bitstream">
           <Option Id="BinFile">1</Option>
         </Step>