diff options
Diffstat (limited to 'rtl/gfx/gfx_fixed_div.sv')
| -rw-r--r-- | rtl/gfx/gfx_fixed_div.sv | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/rtl/gfx/gfx_fixed_div.sv b/rtl/gfx/gfx_fixed_div.sv index 320d9b8..e562072 100644 --- a/rtl/gfx/gfx_fixed_div.sv +++ b/rtl/gfx/gfx_fixed_div.sv @@ -13,10 +13,11 @@ module gfx_fixed_div localparam DIV_BITS = `FIXED_FRAC + $bits(fixed); + fixed d_hold, z_hold; logic signed[DIV_BITS - 1:0] z_int, q_int; assign q = q_int[$bits(q) - 1:0]; - assign z_int = {z, {`FIXED_FRAC{1'b0}}}; + assign z_int = {z_hold, {`FIXED_FRAC{1'b0}}}; `ifndef VERILATOR lpm_divide div @@ -25,7 +26,7 @@ module gfx_fixed_div .clock(clk), .clken(!stall), .numer(z_int), - .denom(d), + .denom(d_hold), .remain(), .quotient(q_int) ); @@ -34,13 +35,28 @@ module gfx_fixed_div div.lpm_widthn = DIV_BITS, div.lpm_widthd = $bits(fixed), div.lpm_nrepresentation = "SIGNED", - div.lpm_nrepresentation = "SIGNED", - div.lpm_pipeline = `FIXED_DIV_STAGES; + div.lpm_drepresentation = "SIGNED", + div.lpm_pipeline = `FIXED_DIV_STAGES - `FIXED_DIV_PIPES, + div.maximize_speed = 6; + + gfx_pipes #(.WIDTH($bits(z)), .DEPTH(`FIXED_DIV_PIPES)) z_pipes + ( + .in(z), + .out(z_hold), + .* + ); + + gfx_pipes #(.WIDTH($bits(d)), .DEPTH(`FIXED_DIV_PIPES)) d_pipes + ( + .in(d), + .out(d_hold), + .* + ); `else - fixed d_hold; logic signed[DIV_BITS - 1:0] d_int_hold, z_int_hold; assign q_int = z_int_hold / d_int_hold; + assign z_hold = z; assign d_int_hold = {{`FIXED_FRAC{d_hold[$bits(d_hold) - 1]}}, d_hold}; gfx_pipes #(.WIDTH($bits(z_int)), .DEPTH(`FIXED_DIV_STAGES)) z_int_pipes |