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1278 Commits

Author SHA1 Message Date
Wilson Snyder 6c9cbaef62 Internals: Clean up some constructors. No functional change intended. 2025-07-03 18:59:32 -04:00
Wilson Snyder b914cda1c7 Internals: cppcheck cleanups. No functional change. 2025-06-28 12:29:41 -04:00
Wilson Snyder 51545b36ca Internals: Add format-make rule and standardize Makefile indents. No functional change intended. 2025-06-24 17:58:55 -04:00
Wilson Snyder 6af694b04b Support `$timeformat` with missing arguments (#6113). 2025-06-24 17:30:05 -04:00
Geza Lore 277611bcdd
Add DFG binToOneHot pass to generate one-hot decoders (#6096) 
Somewhat commonly, there is code out there that compares an expression (or
variable) against many different constants, e.g. a one-hot decoder:

```systemverilog
  assign oneHot = {x == 3, x == 2, x == 1, x == 0};
```

If the width of the expression is sufficiently large, this can blow up
a GCC pass and take an egregious amount of memory and time to compile.

Adding a new DFG pass that will generate a cheap one-hot decoder:
to compute:

```systemverilog
  wire [$bits(x)-1:0] idx = <the expression being compared many times>
  reg tab [1<<$bits(x)] = '{default: 0};
  reg [$bits(x)-1:0] pre = '0;

  always_comb begin
    tab[pre] = 0;
    tab[idx] = 1;
    pre = idx ; // This assignment marked to avoid a false UNOPFTLAT
  end
```

We then replace the comparisons `x == CONST` with `tab[CONST]`.

This is generally performance neutral, but avoids the compile time and memory
blowup with GCC (128GB+ -> 1GB in one example).

We do not apply this if the comparisons seem to be part of a `COMPARE ?
val : COND` conditional tree, which the C++ compilers can turn into jump
tables.

This enables all XiangShan configurations from RTLMeter to now build with GCC,
so in this patch we enabled those in the nightly runs.
 2025-06-16 23:14:24 +01:00
Wilson Snyder 4990b44120 Fix trace hierarchicalName runtime errors (#5668) (#6076). 2025-06-10 20:17:32 -04:00
Paul Swirhun ac06b6fc4f
Fix streaming operator packing order (#5903) (#6077) 2025-06-10 17:23:16 -04:00
Todd Strader d9534ec626
Fix x assign vs init randomization (#6075) 2025-06-09 17:59:01 -04:00
Todd Strader 4b041c636f
Fix --x-initial and --x-assign random stability (#2662) (#5958) (#6018) (#6025) 2025-05-27 09:31:55 -04:00
Wilson Snyder af30436357 Internals: Rename VL_PACK/VL_UNPACK in prep for future fix. No functional change intended. 2025-05-22 06:54:16 -04:00
Wilson Snyder 7b2dc46399 Commentary: Changes update 2025-05-22 06:45:39 -04:00
Ryszard Rozak 2491f25da7
Add filtering type option in verilator_coverage (#6030) 2025-05-22 02:42:09 -07:00
Wilson Snyder de08655c5b Internals: Fix some legacy casts. No functional change. 2025-05-20 22:51:54 -04:00
github action a227aad13d Apply 'make format' 2025-05-20 23:46:57 +00:00
Joel Bodenmann 80ea173390
Add missing FreeBSD include (#6027) (#6028) 
Fixes #6027
 2025-05-20 16:46:07 -07:00
Wilson Snyder 640339ec36 Revert 'Fix --x-initial and --x-assign random stability (#2662) (#5958).' See (#6018). 
Reverts 4581023805 plus line in Changes file
 2025-05-17 20:27:03 -04:00
Wilson Snyder 1bcd5ee0c1 Fix spelling 2025-05-16 19:02:19 -04:00
Todd Strader 4581023805
Fix --x-initial and --x-assign random stability (#2662) (#5958) 2025-05-16 13:54:51 -04:00
Dominick Grochowina 295fae0edc
Fix nullptr segfault in VerilatedVcd::emitTimeChange() (#5980) 2025-05-11 08:01:13 -04:00
Wilson Snyder 7191a0ba8b Internals: Favor preincrements. No functional change. 2025-05-09 21:20:35 -04:00
Yilou Wang a80aa07de6
Support constrained random for associative arrays (#5985) (#5986) 2025-05-07 07:07:16 -04:00
Bartłomiej Chmiel d6e52b9400
Support profiling nested hierarchical mtasks with verilator_gantt (#5956) 2025-04-24 07:50:07 -04:00
Yilou Wang e0fdb933a0
Support constraint random for StructArray (#5805) (#5937) 2025-04-16 07:08:46 -04:00
github action e3e8f18a4e Apply 'make format' 2025-04-15 01:41:13 +00:00
Brian Li 50d7f2afc6
Support assigning unpacked arrays to queues (#5924) (#5928) 2025-04-14 21:40:17 -04:00
Wilson Snyder 174eafd74c Update libfst from upstream 2025-04-12 18:10:40 -04:00
Bartłomiej Chmiel 84f26ed3d7
Add visualization of multi-threaded waiting time with verilator_gantt (#5929) 2025-04-10 10:03:58 -04:00
Wilson Snyder e12b971ba6 Optimize SAIF writes (#5916) 2025-04-05 15:09:32 -04:00
Wilson Snyder 34a760b75b Optimize duplicate timestamps out of traces (#4686) 2025-04-05 14:19:58 -04:00
Wilson Snyder 0984fd045f Change `--trace` to `--trace-vcd`. 2025-04-05 10:46:39 -04:00
Mateusz Gancarz e4771dac7f
In SAIF dumps include signals with TC 0 (#5914) 2025-04-03 16:25:10 -04:00
Wilson Snyder 6d1e82b908
Add numactl-like automatic assignment of processor affinity (#5911) 2025-04-02 08:27:23 -04:00
Wilson Snyder 538f39edf9 Fix grammar. 2025-04-01 07:54:56 -04:00
Wilson Snyder 21229e0350 Update libfst from upstream (gtkwave/libfst#12) 2025-03-30 11:10:38 -04:00
Wilson Snyder f29eeecee7 Fix process comparisons (#5896). 2025-03-29 07:16:54 -04:00
Wilson Snyder 9b48cc33db Fix process comparisons (#5896). 2025-03-28 22:40:21 -04:00
Wilson Snyder ed1e3ec4a2 Internals: Fix some clang-tidy issues. No functional change. 2025-03-27 21:21:37 -04:00
Wilson Snyder 98b89d0f2c Fix some cppcheck warnings. No functional change intended. 2025-03-27 19:46:59 -04:00
Wilson Snyder 5e69faff46 Fix clang 20 warnings 2025-03-27 19:01:25 -04:00
Wilson Snyder 40acac1c57 Fix queue accessing past end (Clang 20 GLIBC warning) 2025-03-27 19:00:43 -04:00
Bartłomiej Chmiel 8965401d10
Fix PGO profiling for multi-threaded hierarchical scenarios (#5888) 2025-03-27 11:10:48 -04:00
Wilson Snyder ce058cc432 Fix `$fscanf` not returning -1 on EOF (#5881). 2025-03-25 08:28:36 -04:00
Bartłomiej Chmiel fabded95df
Support multi-thread hierarchical simulation (#2583) (#5871) 2025-03-24 18:39:29 -04:00
Wilson Snyder 464e19caaa Tests: Fix ubuntu24.04-arm issues 2025-03-22 16:55:53 -04:00
Wilson Snyder c508fd5d24 Internals: Remove single-statement braces. No functional change. 2025-03-19 22:55:11 -04:00
Geza Lore 59cb53cfbc
Set trigger vector in whole words (#5857) 
Having many triggers still hits a bottleneck in LLVM leading to long
compile times.

Instead of setting triggers bit-wise, set them as a whole 64-bit word
when possible. This improves C++ compile times by ~4x on some large
designs and has minor run-time performance benefit.
 2025-03-14 14:06:51 +00:00
Geza Lore aca3b1636a Remove unused gtkwave/wavealloca.h 2025-03-13 14:43:35 +00:00
Geza Lore 51a97ccb90
Update libfst from upstream (#5855) 
Ignore whitespace if comparing this change.
 2025-03-13 07:24:47 -04:00
Gilberto Abram 4dbb066b96
Fix removal of callbacks no longer in current list (#5851) (#5852) 2025-03-11 17:44:12 -04:00
Yilou Wang 7fe51583e5
Fix foreach of assocArr inside a constraint block (#5727) (#5841) 2025-03-11 13:32:34 -04:00