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author	Diego H <diego@symbioticeda.com>	2020-03-30 17:18:13 -0600
committer	Diego H <diego@symbioticeda.com>	2020-03-30 17:18:13 -0600
commit	92809bb1d3c225ab0c846a55979f6914dcfbd886 (patch)
tree	d2f60653faed30758dfcf62de05a029652106f11 /libs/ezsat/demo_bit.cc
parent	05f74d4f315eab0fa0c7e83627482f5160113ba5 (diff)
download	yosys-92809bb1d3c225ab0c846a55979f6914dcfbd886.tar.gz yosys-92809bb1d3c225ab0c846a55979f6914dcfbd886.tar.bz2 yosys-92809bb1d3c225ab0c846a55979f6914dcfbd886.zip

Adding error message for when size (width) of number literal is zero

Diffstat (limited to 'libs/ezsat/demo_bit.cc')

0 files changed, 0 insertions, 0 deletions

#333333 } /* Generic.Heading */ .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */ .highlight .go { color: #888888 } /* Generic.Output */ .highlight .gp { color: #555555 } /* Generic.Prompt */ .highlight .gs { font-weight: bold } /* Generic.Strong */ .highlight .gu { color: #666666 } /* Generic.Subheading */ .highlight .gt { color: #aa0000 } /* Generic.Traceback */ .highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */

library ieee;
use ieee.std_logic_1164.all;

library ieee;
use ieee.numeric_std.all;

entity sub_207 is
	port (
		ge : out std_logic;
		le : out std_logic;
		output : out std_logic_vector(40 downto 0);
		sign : in  std_logic;
		in_b : in  std_logic_vector(40 downto 0);
		in_a : in  std_logic_vector(40 downto 0)
	);
end sub_207;

architecture augh of sub_207 is

	signal carry_inA : std_logic_vector(42 downto 0);
	signal carry_inB : std_logic_vector(42 downto 0);
	signal carry_res : std_logic_vector(42 downto 0);

	-- Signals to generate the comparison outputs
	signal msb_abr  : std_logic_vector(2 downto 0);
	signal tmp_sign : std_logic;
	signal tmp_eq   : std_logic;
	signal tmp_le   : std_logic;
	signal tmp_ge   : std_logic;

begin

	-- To handle the CI input, the operation is '0' - CI
	-- If CI is not present, the operation is '0' - '0'
	carry_inA <= '0' & in_a & '0';
	carry_inB <= '0' & in_b & '0';
	-- Compute the result
	carry_res <= std_logic_vector(unsigned(carry_inA) - unsigned(carry_inB));

	-- Set the outputs
	output <= carry_res(41 downto 1);

	-- Other comparison outputs

	-- Temporary signals
	msb_abr <= in_a(40) & in_b(40) & carry_res(41);
	tmp_sign <= sign;
	tmp_eq  <= '1' when in_a = in_b else '0';

	tmp_le <=
		tmp_eq when msb_abr = "000" or msb_abr = "110" else
		'1' when msb_abr = "001" or msb_abr = "111" else
		'1' when tmp_sign = '0' and (msb_abr = "010" or msb_abr = "011") else
		'1' when tmp_sign = '1' and (msb_abr = "100" or msb_abr = "101") else
		'0';

	tmp_ge <=
		'1' when msb_abr = "000" or msb_abr = "110" else
		'1' when tmp_sign = '0' and (msb_abr = "100" or msb_abr = "101") else
		'1' when tmp_sign = '1' and (msb_abr = "010" or msb_abr = "011") else
		'0';

	ge <= tmp_ge;
	le <= tmp_le;

end architecture;


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