fe72d02cf6
Major rework of the ternary operator elaboration code.
...
This patch reworks much of the ternary code to short circuit when
possible and supports real values better. It adds a blend operator
for real values that returns 0.0 when the values differ and the value
when they match. This deviates slightly from the standard which
specifies that the value for reals is always 0.0 when the conditional
is 'bx. There are also a couple bug fixes.
These fixes have not been ported to continuous assignments yet.
Ternary operators used at compile time and in procedural assignments
should be complete (short circuit and support real values).
2008-03-08 19:45:13 -08:00
32a2e7aa39
Fix lexical scopes within case-generate alternatives.
...
Case-generate alternatives create sub-scopes that need to be scanned
by the scope scanner in order to get function definitions etc. that
are defined lexically within generated scopes.
2008-03-02 21:04:04 -08:00
fac1cc5a1c
Add user function synth and clean up expression code.
...
This patch adds synthesize() for user functions. It also cleans up a
number of inconsistencies and missing checks in the expression code.
2008-02-24 20:00:18 -08:00
11a33a0907
Merge branch 'pscope'
2008-02-24 19:45:21 -08:00
8e704cbf93
Rework handling of lexical scope
...
Move the storage of wires (signals) out of the Module class into
the PScope base class, and instead of putting the PWires all into
the Module object, distribute them into the various lexical scopes
(derived from PScope) so that the wire names do not need to carry
scope information.
This required some rewiring of elaboration of signals, and rewriting
of lexical scope handling.
2008-02-24 19:40:54 -08:00
3716e972ec
Add support for unary +/- in real parameter evaluation.
...
This patch adds support for unary + and - of real value constants
to the eval_tree() functionality.
2008-02-20 17:24:44 -08:00
f1f2806e3c
Get delays of signed extended continuous assignments right.
...
Padding and continuous assignment caused problems if the continuous
assignment includes a delay. The problem is that the padding was
not necessarily included in the delay. Rework the elaboration to
make sure the padding is indeed included in the delay.
2008-02-01 20:13:23 -08:00
5e8a1bd8cc
Add power operator (**) for real values in a continuous assignment.
...
This patch adds the power operator for real values in a continuous
assignment.
2008-01-31 16:48:52 -08:00
d9ac146b8f
Spelling fixes
...
only comments and documentation
some punctuation and capitalization for good measure
Changelogs are purposefully untouched
2008-01-29 20:24:24 -08:00
abfccb65e9
User defined functions take real arguments
...
Allow user defined functions to take real value arguments and return
real value results in net contexts. Use the data type of the nets
attached to the ports to define the data types of the arguments and
return value.
2008-01-28 18:57:55 -08:00
47d65034db
Spelling fixes
...
mostly comments, but includes some identifiers and message text
2008-01-27 18:18:13 -08:00
76164d7711
Rework compile-time evaluation of LT and GT
...
There was much redundant code in the compile-tile handling of the
less-then and greater-then of constant expressions, and much of it
was buggy. Unify much of the code and squeeze out the bugs so that
compile-time evaluations come out correctly.
2008-01-23 20:43:13 -08:00
1f7957c612
Fix type handling of real-value system functions in nets
...
In nets, if system functions return a real value the function lookup
was getting the correct width, but was also setting the width to 0,
which confused down-stream net handling. Real-value system fuctions
have a width of 1. (1 real-valued scalar.)
2008-01-08 18:54:55 -08:00
4c8a7b221c
Proper padding of constant bitwise operands
...
When evaluating bitwise binary expressions at compile time, get the
signed/unsigned padding correct. Pay special attention to the case
of $signed/$unsigned changing the signedness of the operand.
2007-12-17 21:00:18 -08:00
088b4e2fb8
Fix function/task scope searching.
...
When looking for a function or task (scope) do not compare the final path
component with the current module name since it cannot be an up reference.
2007-12-07 17:57:26 -08:00
dd56dd1635
Correct naming of unnamed generate blocks.
...
This patch causes unnamed generate blocks to be automatically named
using the naming scheme defined in the Verilog-2005 standard. This
is a fix for the problem discussed in pr1821610.
2007-11-18 21:01:35 -08:00
dbce0cb05a
Fix @* to correctly handle non-input nets.
...
@* was only expanding to input nets. nex_input() for blocks was removing
any output net that was also an input. There was also a bug in how output
nets were removed. Only outputs currently defined were removed from the
input list.
always @(*) begin
y = a;
z = y;
end
would report "a" as an input. While
always @(*) begin
z = y;
y = a;
end
would report both "a" and "y" as inputs.
To fix this all nex_inputs now take a flag that when true (the default)
correctly removes any output from the input list. Both the above cases
will now return "a". If the flag is false outputs which are also inputs
will be included in the input list. This is what the @* elaboration code
uses to get the correct sensitivity list.
2007-11-07 20:00:05 -08:00
7c852aa075
Add cmos/rcmos primitives.
...
This patch adds the cmos and rcmos primitives.
2007-09-06 18:46:22 -07:00
4f6b47b345
Check that functions do not call invalid statements.
...
This patch adds checks to verify that functions do not invoke
statements that are invalid for them (#, @, wait, enable/call
tasks and non blocking assignment). For reference see section
10.3.4 of 1364-2001.
2007-08-30 20:41:45 -07:00
5e385e901d
Fix missing endif
2007-08-10 10:14:00 -07:00
3b94c122b7
Constant concat operands are self determined
...
distinguish between self-determined and value-preserving when
evaluating constants that are arguments to concatenations.
Signed-off-by: Stephen Williams <steve@icarus.com>
2007-08-09 22:08:54 -07:00
845e74c30e
Evaluate parameter expressions losslessly
...
Make sure parameter expressions are evaluated losslessly, as if
the l-value is unsigned and thus virtually infinite.
2007-06-27 22:05:36 -07:00
c7d97f4146
Properly evaluate scope path expressions.
2007-06-02 03:42:12 +00:00
ddd36ecb6c
Rework the heirarchical identifier parse syntax and pform
...
to handle more general combinations of heirarch and bit selects.
2007-05-24 04:07:11 +00:00
b981c81d37
Rework hname_t to use perm_strings.
2007-04-26 03:06:21 +00:00
583abb7f49
Fix handling calls to tasks in combinational always block
2007-04-17 04:34:23 +00:00
33e5f22cf1
Handle evaluate of addition of real valued constants.
2007-04-07 04:46:18 +00:00
d883979fd8
Seperate arrayness from word count
2007-04-02 01:12:34 +00:00
fe8da0bf14
Remove pretense of general use for t_cookie.
2007-03-26 18:17:50 +00:00
611d2c81b3
Spelling fixes from Larry
2007-03-22 16:08:14 +00:00
d9efe3312e
Limit the calculated widths of constants.
2007-03-08 05:30:02 +00:00
fc9a90c9e0
Add support for edge sensitive spec paths.
2007-03-02 06:13:22 +00:00
243cf94165
Add support for conditional specify delay paths.
2007-03-01 06:19:38 +00:00
1f54f128c1
Handle unary minus of real valued expressions.
2007-02-20 05:58:36 +00:00
45307f6144
Handle type of ternary expressions properly.
2007-02-14 05:59:46 +00:00
6d91be5b19
Use inttypes.h instead of stdint.h for portability.
2007-02-02 04:33:00 +00:00
91d84e7dc7
Major rework of array handling. Memories are replaced with the
...
more general concept of arrays. The NetMemory and NetEMemory
classes are removed from the ivl core program, and the IVL_LPM_RAM
lpm type is removed from the ivl_target API.
2007-01-16 05:44:14 +00:00
c339dc4bbc
Remove last bits of relax_width methods, and use test_width
...
to calculate the width of an r-value expression that may
contain unsized numbers.
2006-11-04 06:19:24 +00:00
2302693201
Expression widths with unsized literals are pseudo-infinite width.
2006-10-30 05:44:49 +00:00
69cd007a71
Support real valued specify delays, properly scaled.
2006-10-03 05:06:00 +00:00
b658a3b41f
Missing PSpec.cc file.
2006-09-26 19:48:40 +00:00
0edb5a7547
Basic support for specify timing.
2006-09-23 04:57:19 +00:00
fc0695beb6
Handle 64bit delay constants.
2006-08-08 05:11:37 +00:00
49b65e86fe
Add support for power in constant expressions.
2006-07-31 03:50:17 +00:00
80f30be9d0
Add support for system functions in continuous assignments.
2006-06-18 04:15:50 +00:00
f001d0001a
Add support for generate loops w/ wires and gates.
2006-04-10 00:37:42 +00:00
5b3ba8c306
Properly handle signedness in compare.
2006-03-18 22:52:27 +00:00
d434dd7296
Allow part selects of memory words in l-values.
2006-02-02 02:43:57 +00:00
58f182a159
Node delays can be more general expressions in structural contexts.
2006-01-02 05:33:19 +00:00
908955c72c
Handle bit select of parameter with ranges.
2005-11-27 05:56:20 +00:00
0e044d6684
More precise about r-value width of constants.
2005-11-26 00:35:42 +00:00
be73be8c98
Spelling patches from Larry.
2005-09-19 21:45:35 +00:00
9fd16575d9
Support bool expressions and compares handle them optimally.
2005-09-14 02:53:13 +00:00
c39976fbf1
Generate code to handle real valued muxes.
2005-09-01 04:11:37 +00:00
b69f59f2ec
Handle memory references is continuous assignments.
2005-08-31 05:07:31 +00:00
a8d49921ee
gcc4 compile errors.
2005-07-14 23:34:18 +00:00
b9799cf6ec
Remove NetVariable and ivl_variable_t structures.
2005-07-11 16:56:50 +00:00
75ad90534b
Generalize signals to carry types.
2005-07-07 16:22:49 +00:00
739a1839ed
Do sign extension of structuran nets.
2005-05-24 01:44:27 +00:00
7796c8bcfb
Parameters cannot have their width changed.
2005-05-17 20:56:55 +00:00
7dd0d255a6
Add support for variable part select.
2005-05-08 23:40:14 +00:00
365cfedd55
Update DFF support to new data flow.
2005-04-24 23:44:01 +00:00
800e2c6a17
All memory addresses are signed.
2005-04-08 04:51:16 +00:00
65c7ec00e7
Rework NetRamDq and IVL_LPM_RAM nodes.
2005-04-06 05:29:08 +00:00
53da6e9a33
Add support for LPM_UFUNC user defined functions.
2005-03-18 02:56:03 +00:00
ab1ca54df2
Update support for LPM_MOD.
2005-03-12 06:43:35 +00:00
1c5b4881d7
Handle case inequality in netlists.
2005-03-09 05:52:03 +00:00
257e1f9516
Support shifts and divide.
2005-02-19 02:43:38 +00:00
d74177634c
Restructure NetMux devices to pass vectors.
...
Generate NetMux devices from ternary expressions,
Reduce NetMux devices to bufif when appropriate.
2005-02-12 06:25:40 +00:00
ee5bb5fcaf
Add the NetRepeat node, and code generator support.
2005-02-08 00:12:36 +00:00
97f83ffbe3
laborate reduction gates into LPM_RED_ nodes.
2005-02-03 04:56:20 +00:00
e6cdd32c19
Clarify width argument to NetNet constructor.
2005-01-30 01:43:48 +00:00
99ace10774
Simplified NetMult and IVL_LPM_MULT.
2005-01-28 05:39:33 +00:00
dfb7c7ba6f
Remove the NetEBitSel and combine all bit/part select
...
behavior into the NetESelect node and IVL_EX_SELECT
ivl_target expression type.
2005-01-24 05:28:30 +00:00
25de448d34
Remove obsolete NetSubnet class.
2005-01-22 18:16:00 +00:00
e28636776a
Change case compare from logic to an LPM node.
2005-01-22 01:06:55 +00:00
bf6a5d0f50
Implement LPM_COMPARE nodes as two-input vector functors.
2005-01-16 04:20:32 +00:00
4d139b58aa
Properly pad vector widths in pgassign.
2005-01-12 03:17:36 +00:00
9e94afe399
Use PartSelect/PV and VP to handle part selects through ports.
2005-01-09 20:16:00 +00:00
8f2d679c8a
Unify elaboration of l-values for all proceedural assignments,
...
including assing, cassign and force.
Generate NetConcat devices for gate outputs that feed into a
vector results. Use this to hande gate arrays. Also let gate
arrays handle vectors of gates when the outputs allow for it.
2004-12-29 23:55:43 +00:00
65e9b6be12
Rework of internals to carry vectors through nexus instead
...
of single bits. Make the ivl, tgt-vvp and vvp initial changes
down this path.
2004-12-11 02:31:25 +00:00
e4ae832153
Clean up spurious trailing white space.
2004-10-04 01:10:51 +00:00
526b87cae3
Remove inaccurate comment.
2004-10-04 00:25:18 +00:00
9de786fc44
Add support for module instance arrays.
2004-09-05 17:44:41 +00:00
62cffe16f4
PR1026: assignment statements can have sensitivities in the l-values.
2004-09-04 04:24:15 +00:00
f02f5be3cc
Fix use of system tasks in AT_STAR statements.
2004-08-28 16:23:05 +00:00
d76ad25778
Do not change reg to wire in NetAssign_ unless synthesizing.
2004-08-28 15:08:31 +00:00
efe05a77cb
nex_output for NetPDelay statements.
2004-06-30 15:32:18 +00:00
3dbc07f34d
Implement signed divide and signed right shift in nets.
2004-06-30 02:16:26 +00:00
9949040285
Add support for the default_nettype directive.
2004-06-13 04:56:53 +00:00
5472b27e1f
Rewire/generalize parsing an elaboration of
...
function return values to allow for better
speed and more type support.
2004-05-31 23:34:36 +00:00
1295058e5d
parameter keys are per_strings.
2004-02-20 06:22:56 +00:00
89acc41437
LPM, logic and Variables have perm_string names.
2004-02-19 07:06:57 +00:00
536068bdfb
Memory and Event names use perm_string.
2004-02-19 06:57:10 +00:00
27af95d402
Use perm_strings for named langiage items.
2004-02-18 17:11:54 +00:00
57c3e86084
Debug dumps for synth2.
2003-12-17 16:52:39 +00:00
43f28b53a3
Design::get_flag returns const char* instead of string.
2003-11-10 20:59:03 +00:00
bc0ead2842
Spelling fixes in comments.
2003-11-08 20:06:21 +00:00
7fd669fcc0
NetEUReduce has its own dup_expr method.
2003-10-31 02:47:11 +00:00
edaa7df6d2
Output of While is output of while substatement.
2003-10-26 04:51:38 +00:00
1f0c274e82
Obsolete find_symbol and find_event from the Design class.
2003-09-20 01:05:35 +00:00
693794552c
Remove find_memory method from Design class.
2003-09-19 03:50:12 +00:00
da7956a797
Fix name search in elab_lval.
2003-09-19 03:30:04 +00:00
178847fc53
Spelling fixes.
2003-09-13 01:01:51 +00:00
7c1401a2ba
Spelling patch.
2003-08-28 04:11:17 +00:00
e561819179
Add synthesis support for synchronous reset.
2003-08-15 02:23:52 +00:00
a95463ff81
Add support for IVL_LPM_MULT device.
2003-08-09 03:23:03 +00:00
bfe31e22bf
Start handling pad of expressions in code generators.
2003-07-26 03:34:42 +00:00
cadf4cfdef
Spelling fixes.
2003-07-15 03:49:22 +00:00
004ecd08dd
Elide empty begin-end in conditionals.
2003-07-02 04:19:16 +00:00
61195c5daa
Harmless fixup of warnings.
2003-06-21 01:21:42 +00:00
ccf4d4d7da
Module attributes from the parser
...
through to elaborated form.
2003-06-20 00:53:19 +00:00
71a404a546
Add arithmetic shift operators.
2003-06-18 03:55:18 +00:00
8352c91b0a
Evaluate <= with real operands.
2003-06-05 04:28:24 +00:00
5903f0744c
Support parameters in real expressions and
...
as real expressions, and fix multiply and
divide with real results.
2003-05-30 02:55:32 +00:00
76295ac873
More complete bit range internal error message,
...
Better test of part select ranges on non-zero
signal ranges.
2003-05-01 01:13:57 +00:00
f1cc9d865b
Support event names as expressions elements.
2003-04-22 04:48:29 +00:00
5d1d99a89f
Handle signed magnitude compare all the
...
way through to the vvp code generator.
2003-04-11 05:18:08 +00:00
2c129dfbfa
Synthesize shift expressions.
2003-04-08 04:33:55 +00:00
d18934d444
Sign extend NetMult inputs if result is signed.
2003-03-29 05:51:25 +00:00
c602d94cef
Comparison operators do have defined width.
2003-03-15 18:08:43 +00:00
6d94f2ea55
Better organize the NetESFunc return type guesses.
2003-03-15 04:46:28 +00:00
1222153cdf
Keep parameter constants for the ivl_target API.
2003-03-10 23:40:53 +00:00
badad63ab4
All NetObj objects have lex_string base names.
2003-03-06 00:28:41 +00:00
486274cfa1
Scope names stored only as basename.
2003-03-03 02:22:41 +00:00
4c67de5ca7
Add the lex_strings string handler, and put
...
scope names and system task/function names
into this table. Also, permallocate event
names from the beginning.
2003-03-01 06:25:30 +00:00
f8d1e15a27
NetEBDiv handles real value constant expressions.
2003-02-07 02:47:57 +00:00
589422b505
Real constants have no defined vector width
2003-02-06 17:50:23 +00:00
e941e7e805
Spelling fixes.
2003-01-30 16:23:07 +00:00
04ada23119
Support in various contexts the $realtime
...
system task.
2003-01-27 00:14:37 +00:00
46253ed873
Rework expression parsing and elaboration to
...
accommodate real/realtime values and expressions.
2003-01-26 21:15:58 +00:00
e62e1d89b6
Named event triggers can take hierarchical names.
2002-12-07 02:49:24 +00:00
9f80ed32b6
Support bit select in constant expressions.
2002-12-05 02:14:33 +00:00
aa8869a3c7
Postpone parameter width check to evaluation.
2002-11-09 01:40:19 +00:00
86032c0aa5
Allow named events to be referenced by
...
hierarchical names.
2002-11-02 03:27:51 +00:00
9ce2806710
Fix synth2 handling of aset/aclr signals where
...
flip-flops are split by begin-end blocks.
2002-10-23 01:45:24 +00:00
3d4593d4d5
Synthesizer support for synchronous begin-end blocks.
2002-10-21 01:42:08 +00:00
43501809b1
Redo the parameter vector support to allow
...
parameter names in range expressions.
2002-10-19 22:59:49 +00:00
166621bcb3
Generate vvp code for asynch set/reset of NetFF.
2002-09-26 03:18:04 +00:00
879a5a4cbe
Synthesize async set/reset is certain cases.
2002-09-26 01:13:14 +00:00
eb81062d85
Add to synth2 support for synthesis of
...
synchronous logic. This includes DFF enables
modeled by if/then/else.
2002-09-16 00:30:33 +00:00
dac99b9374
Add support for binary nand operator.
2002-09-12 15:49:43 +00:00
8ab2ec6f86
Allow release to handle removal of target net.
2002-08-19 00:06:11 +00:00
2fad8d4cff
Detect temporaries in sequential block synthesis.
2002-08-18 22:07:16 +00:00
c794aa02b8
Fix intermix of node functors and node delete.
2002-08-16 05:18:27 +00:00
52bf4e613f
conditional ident string using autoconfig.
2002-08-12 01:34:58 +00:00
693e9e5ad0
Store only the base name of memories.
2002-08-05 04:18:45 +00:00
89314d4772
Do not use hierarchical names of memories to
...
generate vvp labels. -tdll target does not
used hierarchical name string to look up the
memory objects in the design.
2002-08-04 18:28:14 +00:00
bb87c368b8
Asynchronous synthesis of sequential blocks.
2002-07-29 00:00:28 +00:00
58ec62c895
Rewrite find_similar_event to support doing
...
all event matching and replacement in one
shot, saving time in the scans.
2002-07-24 16:24:45 +00:00
Cary R
Stephen Williams
Larry Doolittle
Martin Whitaker
steve