[Anonymous]

unsupported feature: event controls

iverilog -y. -I.. -Wall -DICARUS -DSIMULATION -mfileio -DVCD -y
model -I config -o k4s643233h_0401 k4s643233h_0401.v -M
k4s643233h_0401.deps
k4s643233h_0401.v:800: sorry: Event controls not supported here.
k4s643233h_0401.v:802: sorry: Event controls not supported here.
k4s643233h_0401.v:811: sorry: Event controls not supported here.
k4s643233h_0401.v:951: sorry: Event controls not supported here.
k4s643233h_0401.v:974: sorry: Event controls not supported here.
k4s643233h_0401.v:977: sorry: Event controls not supported here.
k4s643233h_0401.v:1296: sorry: Event controls not supported
here.
k4s643233h_0401.v:1326: sorry: Event controls not supported
here.
k4s643233h_0401.v:1775: sorry: Event controls not supported
here.
k4s643233h_0401.v:1913: sorry: Event controls not supported
here.
k4s643233h_0401.v:1914: sorry: Event controls not supported
here.
k4s643233h_0401.v:1919: sorry: Event controls not supported
here.
k4s643233h_0401.v:2018: sorry: Event controls not supported
here.
k4s643233h_0401.v:2021: sorry: Event controls not supported
here.
k4s643233h_0401.v:2024: sorry: Event controls not supported
here.
k4s643233h_0401.v:2030: sorry: Event controls not supported
here.
k4s643233h_0401.v:2566: sorry: repeat event control not
supported.
k4s643233h_0401.v:2570: sorry: repeat event control not
supported.
make: *** [k4s643233h_0401] Fehler 18

line 800 and 802 are the "data_read <= ...." lines

always @(READ_MODE) begin
// data_read <= repeat(CL-1) @(posedge pclk) READ_MODE;
// VCS does not support above statement. However Verilog-XL is
OK.
// So, I modified as following statement for VCS.
#0.1;
if (READ_MODE == 1'b1)
data_read <= repeat(CL-1) @(posedge pclk) 1'b1;
else
data_read <= repeat(CL-1) @(posedge pclk) 1'b0;
end

don't even properly understand what this does, I only wanted to
use the SDRAM model for verification.

SDRAM model (c) SAMSUNG (from their web)

• milestone: --> devel

Logged In: YES
user_id=1651735
Originator: NO

Fixing this should also fix always3.1.1K.v, always3.1.2G.v, always3.1.2H.v and always 3.1.2I.v.

• labels: 776822 --> Missing functionality

Logged In: YES
user_id=1651735
Originator: NO

I'm looking into this. I have repeat working for blocking statements, but the non-blocking statements require changes to both the compiler and the run time.

• assigned_to: nobody --> caryr
• summary: event controls unsupported --> non-blocking event controls unsupported

This is not fix yet. I don't have non-blocking assignments working for bit based values, but it is working well enough that I have uncovered a different problem. There are continuous assignments that are getting their delay from a variable and Icarus does not support this. Once I finish the non-blocking event delays I will fix the delay problem. It appears to be as simple as using the variable delay operator instead of the fixed delay operator in the code generator.

FYI I have submitted a patch for the variable delay problem.

• status: open --> closed-fixed

I have submitted a patch that allows the attached code to compile correctly. It appear that not enough code was supplied to actually run the memory model, but I have built test code to exercise vector and parts of a vector non-blocking event control. I have not finished adding this functionality for arrays, but that will happen soon and is not needed for this report, so I will close it.