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vgafb: simplify maskgen a bit to avoid timing problems

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slederer 2026-02-01 22:08:06 +01:00
parent bf813fac1d
commit f90d52926f
4 changed files with 33 additions and 37 deletions
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32
tridoracpu/tridoracpu.srcs/vgafb.v
View file

@ -341,28 +341,28 @@ module vgafb #(VMEM_ADDR_WIDTH = 15, VMEM_DATA_WIDTH = 32) (
always @(posedge cpu_clk)
begin
acc_mask_buf <= {
{4{~|{acc_mask_in[31:28]}}},
{4{~|{acc_mask_in[27:24]}}},
{4{~|{acc_mask_in[23:20]}}},
{4{~|{acc_mask_in[19:16]}}},
{4{~|{acc_mask_in[15:12]}}},
{4{~|{acc_mask_in[11:8]}}},
{4{~|{acc_mask_in[7:4]}}},
{4{~|{acc_mask_in[3:0]}}}
{4{|{acc_mask_in[31:28]}}},
{4{|{acc_mask_in[27:24]}}},
{4{|{acc_mask_in[23:20]}}},
{4{|{acc_mask_in[19:16]}}},
{4{|{acc_mask_in[15:12]}}},
{4{|{acc_mask_in[11:8]}}},
{4{|{acc_mask_in[7:4]}}},
{4{|{acc_mask_in[3:0]}}}
};
end
always @(posedge cpu_clk)
begin
acc_shiftmask_buf = {
{4{~|{acc_shifter_out_h[31:28]}}},
{4{~|{acc_shifter_out_h[27:24]}}},
{4{~|{acc_shifter_out_h[23:20]}}},
{4{~|{acc_shifter_out_h[19:16]}}},
{4{~|{acc_shifter_out_h[15:12]}}},
{4{~|{acc_shifter_out_h[11:8]}}},
{4{~|{acc_shifter_out_h[7:4]}}},
{4{~|{acc_shifter_out_h[3:0]}}}
{4{|{acc_shifter_out_h[31:28]}}},
{4{|{acc_shifter_out_h[27:24]}}},
{4{|{acc_shifter_out_h[23:20]}}},
{4{|{acc_shifter_out_h[19:16]}}},
{4{|{acc_shifter_out_h[15:12]}}},
{4{|{acc_shifter_out_h[11:8]}}},
{4{|{acc_shifter_out_h[7:4]}}},
{4{|{acc_shifter_out_h[3:0]}}}
};
end
`endif

34
tridoracpu/tridoracpu.xpr
View file

@ -356,14 +356,12 @@
</Simulator>
</Simulators>
<Runs Version="1" Minor="22">
<Run Id="synth_1" Type="Ft3:Synth" SrcSet="sources_1" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Performs optimizations which creates alternative logic technology mapping, including disabling LUT combining, forcing F7/F8/F9 to logic, increasing the threshold of shift register inference." AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/synth_1" IncludeInArchive="true" IsChild="false" AutoIncrementalDir="$PSRCDIR/utils_1/imports/synth_1" AutoRQSDir="$PSRCDIR/utils_1/imports/synth_1" ParallelReportGen="true">
<Run Id="synth_1" Type="Ft3:Synth" SrcSet="sources_1" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Vivado Synthesis Defaults" AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$PRUNDIR/synth_1" IncludeInArchive="true" IsChild="false" AutoIncrementalDir="$PSRCDIR/utils_1/imports/synth_1" AutoRQSDir="$PSRCDIR/utils_1/imports/synth_1" ParallelReportGen="true">
<Strategy Version="1" Minor="2">
<StratHandle Name="Flow_AlternateRoutability" Flow="Vivado Synthesis 2024"/>
<Step Id="synth_design">
<Option Id="Directive">3</Option>
<Option Id="NoCombineLuts">1</Option>
<Option Id="ShregMinSize">10</Option>
</Step>
<StratHandle Name="Vivado Synthesis Defaults" Flow="Vivado Synthesis 2024">
<Desc>Vivado Synthesis Defaults</Desc>
</StratHandle>
<Step Id="synth_design"/>
</Strategy>
<GeneratedRun Dir="$PRUNDIR" File="gen_run.xml"/>
<ReportStrategy Name="Vivado Synthesis Default Reports" Flow="Vivado Synthesis 2024"/>
@ -380,24 +378,18 @@
<Report Name="ROUTE_DESIGN.REPORT_METHODOLOGY" Enabled="1"/>
<RQSFiles/>
</Run>
<Run Id="impl_1" Type="Ft2:EntireDesign" Part="xc7a35ticsg324-1L" ConstrsSet="constrs_1" Description="Best predicted directive for place_design." AutoIncrementalCheckpoint="false" WriteIncrSynthDcp="false" State="current" Dir="$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="Default settings for Implementation." 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_Auto_1" Flow="Vivado Implementation 2024"/>
<StratHandle Name="Vivado Implementation Defaults" Flow="Vivado Implementation 2024">
<Desc>Default settings for Implementation.</Desc>
</StratHandle>
<Step Id="init_design"/>
<Step Id="opt_design">
<Option Id="Directive">0</Option>
</Step>
<Step Id="opt_design"/>
<Step Id="power_opt_design"/>
<Step Id="place_design">
<Option Id="Directive">20</Option>
</Step>
<Step Id="place_design"/>
<Step Id="post_place_power_opt_design"/>
<Step Id="phys_opt_design">
<Option Id="Directive">2</Option>
</Step>
<Step Id="route_design">
<Option Id="Directive">1</Option>
</Step>
<Step Id="phys_opt_design"/>
<Step Id="route_design"/>
<Step Id="post_route_phys_opt_design"/>
<Step Id="write_bitstream"/>
</Strategy>