Concurrent Rules

concurrent_001

This rule checks the indent of concurrent assignments.

Violation

architecture RTL of FIFO is
begin

     wr_en <= '0';
rd_en <= '1';

Fix

architecture RTL of FIFO is
begin

  wr_en <= '0';
  rd_en <= '1';

concurrent_002

This rule checks for a single space after the <= operator.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

wr_en <=    '0';
rd_en <=   '1';

Fix

wr_en <= '0';
rd_en <= '1';

concurrent_003

This rule checks alignment of multiline concurrent simple signal assignments. Successive lines should align to the space after the assignment operator. However, there is a special case if there are parenthesis in the assignment. If the parenthesis are not closed on the same line, then the next line will be aligned to the parenthesis. Aligning to the parenthesis improves readability.

Refer to Configuring Multiline Indent Rules for more information.

Violation

O_FOO <= (1 => q_foo(63 downto 32),
         0 => q_foo(31 downto  0));

n_foo <= resize(unsigned(I_FOO) +
         unsigned(I_BAR), q_foo'length);

Fix

O_FOO <= (1 => q_foo(63 downto 32),
          0 => q_foo(31 downto  0));

n_foo <= resize(unsigned(I_FOO) +
                unsigned(I_BAR), q_foo'length);

concurrent_004

This rule checks for at least a single space before the <= operator.

Refer to Configuring Whitespace Rules for options on changing the number of whitespaces..

Violation

wr_en<= '0';

Fix

wr_en <= '0';

concurrent_005

This rule checks for labels on concurrent assignments. Labels on concurrents are optional and do not provide additional information.

Violation

WR_EN_OUTPUT : WR_EN <= q_wr_en;
RD_EN_OUTPUT : RD_EN <= q_rd_en;

Fix

WR_EN <= q_wr_en;
RD_EN <= q_rd_en;

concurrent_006

This rule checks the alignment of the <= operator over multiple consecutive lines. Refer to Configuring Keyword Alignment Rules for information on changing the configurations.

Violation

wr_en <= '0';
rd_en   <= '1';
data <= (others => '0');

Fix

wr_en <= '0';
rd_en <= '1';
data  <= (others => '0');

concurrent_007

This rule has been renamed to conditional_waveforms_001.

concurrent_008

This rule checks the alignment of inline comments in consecutive concurrent statements. Refer to Configuring Keyword Alignment Rules for information on changing the configurations.

Violation

wr_en <= '0';     -- Write enable
rd_en <= '1';   -- Read enable
data  <= (others => '0'); -- Write data

Fix

wr_en <= '0';             -- Write enable
rd_en <= '1';             -- Read enable
data  <= (others => '0'); -- Write data

concurrent_009

This rule checks alignment of multiline concurrent conditional signal statements.

Refer to Configuring Conditional Multiline Indent Rules for more information.

Violation

wr_en <= '0' when q_wr_en = '1' else
     '1';

w_foo <= I_FOO when ((I_BAR = '1') and
         (I_CRUFT = '1')) else
         '0';

Fix

wr_en <= '0' when q_wr_en = '1' else
         '1';

w_foo <= I_FOO when ((I_BAR = '1') and
                     (I_CRUFT = '1')) else
         '0';

concurrent_010

This rule removes blank lines within concurrent signal assignments.

Violation

wr_en <= '0' when q_wr_en = '1' else

     '1';

w_foo <= I_FOO when ((I_BAR = '1') and

                     (I_CRUFT = '1')) else

         '0';

Fix

wr_en <= '0' when q_wr_en = '1' else
         '1';

w_foo <= I_FOO when ((I_BAR = '1') and
                     (I_CRUFT = '1')) else
         '0';

concurrent_011

This rule checks the structure of simple and conditional concurrent statements.

Refer to Configuring Simple Multiline Structure Rules for more information.

Violation

wr_en <=
  '0' when q_wr_en = '1' else
         '1';

w_foo <=
  I_FOO when ((I_BAR = '1') and
                     (I_CRUFT = '1')) else
         '0';

Fix

wr_en <= '0' when q_wr_en = '1' else
         '1';

w_foo <= I_FOO when ((I_BAR = '1') and
                     (I_CRUFT = '1')) else
         '0';

concurrent_012

This rule checks the structure of multiline concurrent simple signal assignments that contain arrays.

Refer to Configuring Array Multiline Structure Rules for more information.

Violation

wr_data <= (0, 65535, 32768);

Fix

wr_data <=
(
  0,
  65535,
  32768
);

concurrent_400

This rule checks the alignment the => operator in record aggregates.

Refer to Configuring Keyword Alignment Rules for information on changing the configurations.

Violation

interface <= (
              write_words => 12,
              read_words => 32
              address => 57
             );

Fix

interface <= (
              write_words => 12,
              read_words  => 32
              address     => 57
             );

concurrent_401

This rule checks the alignment of multiline concurrent simple signal assignments that contain arrays.

Refer to Configuring Multiline Indent Rules for more information.

Violation

wr_data <=
(
         0,
     65535,
     32768
  );

Fix

wr_data <=
(
  0,
  65535,
  32768
);