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[SOLVED] Synthesis WARNING:Xst:790 - How to deal ?

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blooz

blooz

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Here is the Exact Message
>>
line 213: Index value(s) does not match array range, simulation mismatch.

--type round_key is array (51 downto 0) of unsigned (31 downto 0);

--constant roundkey:round_key
--s00 and s_00 are 7 downto 0 signal

Code: 
line 213>> s_00<=s00 xor roundkey ((dims(round)))(31 downto 24);


the Dims Function
f
Code: 
unction dims(a: in std_logic_vector (7 downto 0))return 
	integer is 
	variable Z:integer ;
	begin 
		case  a is 
		when B"00000000"=>
			z:=3;
		when B"00000001"=> 
		z:=7;
		when B"00000010"=>
		z:=11;
		
	    when B"00000011"=>
		z:=15;
		when B"00000100"=>
		z:=19;
		when B"00000101"=>
		z:=23;
		when B"00000110"=>
		z:=27;
		when B"00000111"=>
		z:=31;
		when B"00001000"=>
		z:=35;
		when B"00001001"=>
		z:=39;
		when B"00001010"=>
		z:=43;
		when B"00001011" =>
		z:=47;
		when B"00001100"	=>
		z:=51;
		when OTHERS  =>
		z:=0;
	end case;
	return(z);
	end dims;
 

No habla vhdl senor, but it looks like a mismatch in length of bit-vectors.
 
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    blooz

    blooz

    Points: 2
    Helpful Answer Positive Rating
why not use temporary variables and do it in stages to make it more readiable?
 
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    blooz

    blooz

    Points: 2
    Helpful Answer Positive Rating
Solved
1.h**p://forums.xilinx.com/t5/Synthesis/I-don-t-understand-quot-Xst-790-Index-value-s-does-not-match/td-p/36347
 
blooz said:
Solved
1.h**p://forums.xilinx.com/t5/Synthesis/I-don-t-understand-quot-Xst-790-Index-value-s-does-not-match/td-p/36347
Click to expand...

thanks for the followup! What does your working code look like now? (reference for future victims of the same error ;) )
 

here is the Declaration that Produced the Warning
Code: 
type round_key is array [COLOR=#FF0000][B][U](51 downto 0)[/U][/B][/COLOR] of unsigned (31 downto 0);    
constant roundkey:round_key:=(




x"96C04816",
x"B2EC2BC0",                                    
x"4827C30B",
x"BA17DF4C",


x"92123943",
x"47A6F60D",
x"472A2FEF",
x"1AC76953",

x"7BACA230",
x"2281C107",
x"535659BC",
x"AE9E8525",


x"24933394",
x"8B76A68B",
x"8AFADC0A",
x"C9F40E8C",



x"6DE74109",
x"0978D5FD",
x"639A1315",
x"A6394AA4",



x"36358C4E",
x"6C45C11F",
x"0C21B2D1",
x"76147515",


x"BD98B7C5",
x"97C31DE2",
x"AB51DA7C",
x"13222BCC",



x"B80B1E73",
x"7EF22C42",
x"789E1CB6",
x"5CDB2A44",


x"86B854FC",
x"826B5F55",
x"1B691E0A",
x"D6AA4113",


x"5939A288",
x"ECF620C9",
x"31BF3C4F",
x"57F701F5",



x"64B714B2",
x"BC473DC5",
x"B7828528",
x"E1A1E737",



x"42A301B4",
x"58B91BAE",
x"80EB367C",
x"3D568BC1",


x"0028DE9E",
x"0028DE9E",
x"0028DE9E",
x"0028DE9E"

);--



Here is the Corrected Version


Code: 
type round_key is array ([COLOR=#0000FF]63 downto 0)[/COLOR] of unsigned (31 downto 0);    
constant roundkey:round_key:=(


x"00000000",
x"00000000",
x"00000000",
x"00000000",



x"00000000",
x"00000000",
x"00000000",
x"00000000",


x"00000000",
x"00000000",
x"00000000",
x"00000000",

x"96C04816",
x"B2EC2BC0",                                    
x"4827C30B",
x"BA17DF4C",


x"92123943",
x"47A6F60D",
x"472A2FEF",
x"1AC76953",

x"7BACA230",
x"2281C107",
x"535659BC",
x"AE9E8525",


x"24933394",
x"8B76A68B",
x"8AFADC0A",
x"C9F40E8C",



x"6DE74109",
x"0978D5FD",
x"639A1315",
x"A6394AA4",



x"36358C4E",
x"6C45C11F",
x"0C21B2D1",
x"76147515",


x"BD98B7C5",
x"97C31DE2",
x"AB51DA7C",
x"13222BCC",



x"B80B1E73",
x"7EF22C42",
x"789E1CB6",
x"5CDB2A44",


x"86B854FC",
x"826B5F55",
x"1B691E0A",
x"D6AA4113",


x"5939A288",
x"ECF620C9",
x"31BF3C4F",
x"57F701F5",



x"64B714B2",
x"BC473DC5",
x"B7828528",
x"E1A1E737",



x"42A301B4",
x"58B91BAE",
x"80EB367C",
x"3D568BC1",


x"0028DE9E",
x"0028DE9E",
x"0028DE9E",
x"0028DE9E"

);--



type round_key is array (51 downto 0) of unsigned (31 downto 0) >>type round_key is array (63 downto 0) of unsigned (31 downto 0);

changed the array length from (51 downto 0 ) to (63 downto 0) so that array length is a power of two
 
Last edited:

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