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Add pattern detection support for DSP48E1 model, check against vendor

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This commit is contained in:
Eddie Hung 2019-09-18 10:45:04 -07:00
parent 1f18736d20
commit e992dbf2c5
3 changed files with 102 additions and 8 deletions
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47
techlibs/xilinx/cells_sim.v
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@ -498,8 +498,8 @@ module DSP48E1 (
output reg MULTSIGNOUT,
output OVERFLOW,
output reg signed [47:0] P,
output PATTERNBDETECT,
output PATTERNDETECT,
output reg PATTERNBDETECT,
output reg PATTERNDETECT,
output [47:0] PCOUT,
output UNDERFLOW,
input signed [29:0] A,
@ -575,10 +575,8 @@ module DSP48E1 (
initial begin
`ifdef __ICARUS__
if (AUTORESET_PATDET != "NO_RESET") $fatal(1, "Unsupported AUTORESET_PATDET value");
//if (PREG != 0) $fatal(1, "Unsupported PREG value");
if (SEL_MASK != "MASK") $fatal(1, "Unsupported SEL_MASK value");
if (SEL_PATTERN != "PATTERN") $fatal(1, "Unsupported SEL_PATTERN value");
if (USE_PATTERN_DETECT != "NO_PATDET") $fatal(1, "Unsupported USE_PATTERN_DETECT value");
if (USE_SIMD != "ONE48" && USE_SIMD != "TWO24" && USE_SIMD != "FOUR12") $fatal(1, "Unsupported USE_SIMD value");
if (IS_ALUMODE_INVERTED != 4'b0) $fatal(1, "Unsupported IS_ALUMODE_INVERTED value");
if (IS_CARRYIN_INVERTED != 1'b0) $fatal(1, "Unsupported IS_CARRYIN_INVERTED value");
@ -897,4 +895,45 @@ module DSP48E1 (
assign PCOUT = P;
generate
wire PATTERNDETECTd, PATTERNBDETECTd;
if (USE_PATTERN_DETECT == "PATDET") begin
// TODO: Support SEL_PATTERN != "PATTERN" and SEL_MASK != "MASK
assign PATTERNDETECTd = &(~(Pd ^ PATTERN) | MASK);
assign PATTERNBDETECTd = &((Pd ^ PATTERN) | MASK);
end else begin
assign PATTERNDETECTd = 1'b1;
assign PATTERNBDETECTd = 1'b1;
end
if (PREG == 1) begin
reg PATTERNDETECTPAST, PATTERNBDETECTPAST;
initial PATTERNDETECT = 1'b0;
initial PATTERNBDETECT = 1'b0;
initial PATTERNDETECTPAST = 1'b0;
initial PATTERNBDETECTPAST = 1'b0;
always @(posedge CLK)
if (RSTP) begin
PATTERNDETECT <= 1'b0;
PATTERNBDETECT <= 1'b0;
PATTERNDETECTPAST <= 1'b0;
PATTERNBDETECTPAST <= 1'b0;
end else if (CEP) begin
PATTERNDETECT <= PATTERNDETECTd;
PATTERNBDETECT <= PATTERNBDETECTd;
PATTERNDETECTPAST <= PATTERNDETECT;
PATTERNBDETECTPAST <= PATTERNBDETECT;
end
assign OVERFLOW = &{PATTERNDETECTPAST, ~PATTERNBDETECT, ~PATTERNDETECT};
assign UNDERFLOW = &{PATTERNBDETECTPAST, ~PATTERNBDETECT, ~PATTERNDETECT};
end else begin
always @* begin
PATTERNDETECT = PATTERNDETECTd;
PATTERNBDETECT = PATTERNBDETECTd;
end
assign OVERFLOW = 1'bx, UNDERFLOW = 1'bx;
end
endgenerate
endmodule