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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
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@ -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