luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
3,700 Commits 23 Branches 234 Tags 41 MiB
Commit Graph

139 Commits

Author SHA1 Message Date
Stephen Williams a0b1272a62 Fix signed/unsigned warnings 
Fixed some signed/unsigned warnings, including one that caused an
actual runtime error if not dealt with safely.

Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-10-09 21:19:38 -07:00
Stephen Williams ae16eacec9 Argument to $unsigned is self-determined. 
The argument to $unsigned is self-determined no matter what the
context the $unsigned itself is in. This is important only where
the result can be negative but the result width is context-determined.
Do ocntext fitting manually to prevent the context fitting it and
affecting the expression argument.

Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-10-09 20:46:17 -07:00
Stephen Williams c7edace243 Unsized integers have minimum size 
Fix the handling of expressions that have unsized integers and are
in self determined context. Unsized integers are generally assumed
to have at least 32bits.

Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-10-08 19:58:49 -07:00
Stephen Williams d587499276 test_width method for functions in expressions 
In expressions, user defined functions have a clearly defined
width and the test_width expression needs to express that. Note
that the $signed/$unsigned functions are special and magical.

Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-10-01 20:38:20 -07:00
Stephen Williams 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
Martin Whitaker 42fe46a7db Elaborate memory references with non-zero bases. 
This fixes r-value type references to memory words for memories
that have a non-zero base address. Elaborate the expression
needed to get the canonical word index.
 2007-07-21 17:19:24 -07:00
Stephen Williams 6b0c62c9c4 Minor improvements to $bits implementation 
Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-07-17 18:05:48 -07:00
Larry Doolittle 371c5d932d Correct wrong or misleading comments. 2007-07-06 12:46:32 -07:00
Stephen Williams a72977a7ed Bit select of array word 
fix support for bit select of array word in behavioral expressions.
 2007-07-03 20:17:43 -07:00
Stephen Williams d7c3a32b06 Fix code generation for real expressions 
Real value are vector width of 1, fix real literal to reflect this.
fix leaking real registers in code generation for function arguments.
Load of signal should handle conversion from real to vector. Function
arguments, type vector passed a real value, are an example where this
comes up.

Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-06-29 21:10:37 -07:00
Stephen Williams 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
Stephen Williams 59a43ab2ce Do not match scopes in ident expressions 
Identifiers in expressions cannot be scope names, even
though the special case of a simple system task argument
expression allows it.
 2007-06-25 20:33:40 -07:00
Stephen Williams 9d2dd782c0 Get offsets right for non-zero and reversed part selects. 
Signed-off-by: Stephen Williams <steve@icarus.com>
 2007-06-15 16:59:24 -07:00
steve c7d97f4146 Properly evaluate scope path expressions. 2007-06-02 03:42:12 +00:00
steve 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
steve 0168502bbb Get offsets into indexed part selects correct. 2007-04-01 05:28:26 +00:00
steve 9e21880cdc Handle part select of array words. 2007-03-26 19:23:13 +00:00
steve 32fb919b00 Replace some asserts with ivl_asserts. 2007-03-14 05:06:49 +00:00
steve ae88f5cc68 Lint fixes. 2007-03-07 00:38:15 +00:00
steve 760f2182ba Support signed function return values. 2007-03-06 05:22:49 +00:00
steve b21390b228 Better error message when operating on array. 2007-03-02 01:55:36 +00:00
steve ca9da51a79 Precalculate constant power expressions, and constant function arguments. 2007-01-19 05:42:40 +00:00
steve 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
steve 34b5a31ff4 Add test_width methods for PETernary and PEString. 2006-11-10 04:54:26 +00:00
steve 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
steve 2302693201 Expression widths with unsized literals are pseudo-infinite width. 2006-10-30 05:44:49 +00:00
steve 2a8b960b06 More detailed internal error message. 2006-10-15 03:25:57 +00:00
steve 69cd007a71 Support real valued specify delays, properly scaled. 2006-10-03 05:06:00 +00:00
steve d6be82f748 Support selective control of specify and xtypes features. 2006-09-28 04:35:18 +00:00
steve 7e3ea2ffe8 Allow specparams as constants in expressions. 2006-09-28 00:29:49 +00:00
steve 92cb1d4e2d Use elab_and_eval for bit select expressions. 2006-09-19 23:00:15 +00:00
steve 50800fd3a1 Add support for real valued modulus. 2006-08-09 05:19:08 +00:00
steve 49b65e86fe Add support for power in constant expressions. 2006-07-31 03:50:17 +00:00
steve aab6fefd8a Fix context determined with of constants. 2006-07-07 04:06:37 +00:00
steve 71faebd6df Make elaborate_expr methods aware of the width that the context 
requires of it. In the process, fix sizing of the width of unary
 minus is context determined sizes.
 2006-06-02 04:48:49 +00:00
steve 53ae1f29c9 Fix broken subtraction of small constants. 2006-06-01 03:54:51 +00:00
steve fc5cf55400 Use elab_and_eval to evaluate genvar expressions. 2006-04-12 05:05:03 +00:00
steve d434dd7296 Allow part selects of memory words in l-values. 2006-02-02 02:43:57 +00:00
steve 908955c72c Handle bit select of parameter with ranges. 2005-11-27 05:56:20 +00:00
steve b416ae047b Fix compile warning. 2005-11-14 22:11:52 +00:00
steve c02b3b8ac6 Reorganize signal part select handling, and add support for 
indexed part selects.

 Expand expression constant propagation to eliminate extra
 sums in certain cases.
 2005-11-10 13:28:11 +00:00
steve a652719876 Add support for indexed select attached to parameters. 2005-10-04 04:09:25 +00:00
steve be73be8c98 Spelling patches from Larry. 2005-09-19 21:45:35 +00:00
steve 9fd16575d9 Support bool expressions and compares handle them optimally. 2005-09-14 02:53:13 +00:00
steve 4902c222fb Check operand types for compatibility. 2005-09-01 04:10:47 +00:00
steve b9799cf6ec Remove NetVariable and ivl_variable_t structures. 2005-07-11 16:56:50 +00:00
steve 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
steve 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
steve e4ae832153 Clean up spurious trailing white space. 2004-10-04 01:10:51 +00:00
steve 7f67afe9d5 Add support for $unsigned. 2004-08-28 15:42:11 +00:00