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Lars-Peter Clausen 5311c0cd38 vvp: Add opcode for unary real minus 
Currently the vvp target emits unary real minus as `0.0 - value`.
This is not the same operation for all real values. It loses the
negative zero result for `-(+0.0)` and does not reliably flip the sign
bit for NaN values whose bits are visible through `$realtobits`.

Add `%neg/wr` and use it for unary real minus. This performs a direct
negation of the real stack value, so zero, NaN and infinity all use the
same operation as unary minus instead of a binary subtraction from zero.

Signed-off-by: Lars-Peter Clausen <[email protected]>
2026-06-22 07:43:02 -07:00
..
examples
Update vvp examples to match the correct version
2026-03-02 10:48:10 -08:00
arith.cc
More cppcheck cleanup
2026-01-05 18:59:08 -08:00
arith.h
cppcheck updates
2025-11-23 01:31:14 -08:00
array_common.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
array_common.h
More cppcheck cleanup
2026-01-05 18:59:08 -08:00
array.cc
More cppcheck cleanup
2026-01-19 19:50:10 -08:00
array.h
vvp: Remove unused compile_varw_real()
2022-06-20 22:59:12 +02:00
bufif.cc
Add support for passing a real input to logic, mos and if gates
2025-06-21 10:04:12 -07:00
bufif.h
Minor cppcheck updates in vvp and switch vvp to use override for virtual functions
2025-07-21 23:32:34 -07:00
class_type.cc
More cppcheck cleanup
2026-01-19 19:50:10 -08:00
class_type.h
cppcheck updates
2025-11-23 01:31:14 -08:00
codes.cc
Fix valgrind compile
2016-02-03 22:25:57 -08:00
codes.h
vvp: Add opcode for unary real minus
2026-06-22 07:43:02 -07:00
compile.cc
vvp: Add opcode for unary real minus
2026-06-22 07:43:02 -07:00
compile.h
Cppcheck cleanup
2026-05-21 05:21:35 -07:00
concat.cc
vvp: concat: Defer update to end of the current simulation cycle
2024-01-20 10:32:55 -08:00
concat.h
cppcheck updates
2025-11-23 01:31:14 -08:00
config.h.in
Switch to std::round() and a common routine for real to uint64_t
2025-12-16 19:52:36 -08:00
cppcheck.sup
Fix/update latest cppcheck issues
2026-05-10 14:47:40 -07:00
delay.cc
Cppcheck cleanup
2026-05-21 05:21:35 -07:00
delay.h
Cleanup vhdl and most of vvp cppcheck issues
2026-01-19 22:54:45 -08:00
dff.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
dff.h
cppcheck updates
2025-11-23 01:31:14 -08:00
draw_tt.c
Fix some cppcheck warnings
2015-10-02 09:43:54 -07:00
enum_type.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
enum_type.h
Update header files to use a more standard name to prevent rereading
2014-07-23 13:42:56 -07:00
event.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
event.h
cppcheck updates
2025-11-23 01:31:14 -08:00
extend.cc
vvp: Remove wid parameter from recv_vec{4,8}_pv()
2022-05-28 15:34:02 +02:00
file_line.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
island_tran.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
latch.cc
vvp: Remove wid parameter from recv_vec{4,8}_pv()
2022-05-28 15:34:02 +02:00
latch.h
cppcheck updates
2025-11-23 01:31:14 -08:00
lexor.lex
More cppcheck cleanup
2026-01-05 18:59:08 -08:00
lib_main.cc
pthread_exit() is no longer needed and fixes vvp return
2026-02-06 01:55:36 -08:00
libvvp.h
Add vvp "quiet" flag (issue #1193)
2024-12-31 13:05:36 +00:00
libvvp.pc.in
vvp: build and install libvvp as a versioned shared library
2026-05-13 10:45:04 +02:00
logic.cc
Update Copyright that was missed for a few files
2026-05-08 05:35:16 -07:00
logic.h
cppcheck updates
2025-11-23 01:31:14 -08:00
main.cc
Update program copyright to 2026
2026-01-13 02:04:37 -08:00
Makefile.in
vvp: build and install libvvp as a versioned shared library
2026-05-13 10:45:04 +02:00
npmos.cc
Add support for passing a real input to logic, mos and if gates
2025-06-21 10:04:12 -07:00
npmos.h
Minor cppcheck updates in vvp and switch vvp to use override for virtual functions
2025-07-21 23:32:34 -07:00
parse_misc.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
parse_misc.h
Update header files to use a more standard name to prevent rereading
2014-07-23 13:42:56 -07:00
parse.y
cppcheck updates
2025-11-23 01:31:14 -08:00
part.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
part.h
cppcheck updates
2025-11-23 01:31:14 -08:00
permaheap.cc
updated FSF-address
2012-08-29 10:12:10 -07:00
permaheap.h
Update header files to use a more standard name to prevent rereading
2014-07-23 13:42:56 -07:00
reduce.cc
vvp: Improve reduction operator performance
2026-05-07 21:26:17 -07:00
resolv.cc
vvp: Remove wid parameter from recv_vec{4,8}_pv()
2022-05-28 15:34:02 +02:00
resolv.h
cppcheck updates
2025-11-23 01:31:14 -08:00
schedule.cc
Move all simulation callback decls to the header
2026-02-06 09:48:41 -08:00
schedule.h
Move all simulation callback decls to the header
2026-02-06 09:48:41 -08:00
sfunc.cc
fix broken call-out of real-valued system functions.
2014-01-21 13:31:49 -08:00
sfunc.h
cppcheck updates
2025-11-23 01:31:14 -08:00
slab.h
cppcheck updates
2025-11-23 01:31:14 -08:00
statistics.cc
updated FSF-address
2012-08-29 10:12:10 -07:00
statistics.h
Update header files to use a more standard name to prevent rereading
2014-07-23 13:42:56 -07:00
stop.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
substitute.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
symbols.cc
Fix initialisation of vvp symbol table values.
2019-08-01 12:34:47 +01:00
symbols.h
More cppcheck cleanup
2026-01-19 19:50:10 -08:00
udp.cc
Cleanup vhdl and most of vvp cppcheck issues
2026-01-19 22:54:45 -08:00
udp.h
cppcheck updates
2025-11-23 01:31:14 -08:00
ufunc.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
ufunc.h
cppcheck updates
2025-11-23 01:31:14 -08:00
vpi_bit.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_callback.cc
More cppcheck cleanup
2026-01-05 18:59:08 -08:00
vpi_cobject.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_const.cc
Fix compile warning when long and int have the same width
2026-01-05 20:50:35 -08:00
vpi_darray.cc
Fix the valgrind cleanup of automatic array vars
2026-02-06 21:35:13 -08:00
vpi_event.cc
Implement vpi_put_value() for named events (GitHub issue #158).
2017-06-15 08:47:29 +01:00
vpi_iter.cc
Fix new/free mismatch in vvp.
2012-08-30 19:33:25 -07:00
vpi_mcd.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_modules.cc
Add correct C++ cast for the vpi_modules
2025-10-21 00:44:23 -07:00
vpi_priv.cc
Fix sdf_interconnect4 failure and reenable
2026-02-24 22:24:17 -08:00
vpi_priv.h
Add basic support for vpi_get64() to return the nexus pointer
2026-01-25 17:50:06 -08:00
vpi_real.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_scope.cc
Fix the valgrind cleanup of automatic array vars
2026-02-06 21:35:13 -08:00
vpi_signal.cc
Add basic support for vpi_get64() to return the nexus pointer
2026-01-25 17:50:06 -08:00
vpi_string.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_tasks.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
vpi_time.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vpi_vthr_vector.cc
Cleanup vhdl and most of vvp cppcheck issues
2026-01-19 22:54:45 -08:00
vpip_bin.cc
Fix implicit fallthrough warnings when building with recent GCC.
2018-10-06 20:15:42 +01:00
vpip_format.cc
updated FSF-address
2012-08-29 10:12:10 -07:00
vpip_hex.cc
Fix implicit fallthrough warnings when building with recent GCC.
2018-10-06 20:15:42 +01:00
vpip_oct.cc
Fix implicit fallthrough warnings when building with recent GCC.
2018-10-06 20:15:42 +01:00
vpip_to_dec.cc
Cppcheck cleanup
2026-05-21 05:21:35 -07:00
vthread.cc
vvp: Add opcode for unary real minus
2026-06-22 07:43:02 -07:00
vthread.h
vvp: Handle %fork in final procedures
2023-04-16 09:20:31 -07:00
vvp_cleanup.h
Fix the valgrind cleanup of automatic array vars
2026-02-06 21:35:13 -08:00
vvp_cobject.cc
Allow class properties to be arrayed.
2014-09-15 17:37:30 -07:00
vvp_cobject.h
cppcheck updates
2025-11-23 01:31:14 -08:00
vvp_darray.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
vvp_darray.h
cppcheck updates
2025-11-23 01:31:14 -08:00
vvp_island.cc
cppcheck updates
2025-11-23 01:31:14 -08:00
vvp_island.h
Cppcheck cleanup
2026-05-21 05:21:35 -07:00
vvp_net_sig.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00
vvp_net_sig.h
More cppcheck cleanup
2026-01-19 19:50:10 -08:00
vvp_net.cc
vvp: Improve reduction operator performance
2026-05-07 21:26:17 -07:00
vvp_net.h
vvp: Improve reduction operator performance
2026-05-07 21:26:17 -07:00
vvp_object.cc
Fix dynamic array assignment to make a copy of the rvalue.
2020-11-26 12:52:06 -08:00
vvp_object.h
Fix dynamic array assignment to make a copy of the rvalue.
2020-11-26 12:52:06 -08:00
vvp_vpi_callback.h
Fix for br1019 - allow multiple array words to be attached to a vpi callback.
2017-08-12 12:23:43 +01:00
vvp_vpi.cc
Remove malloc.h support and for C++ files use <c...> include files.
2010-06-01 08:56:30 -07:00
vvp.def
Add missing declaration for vpi_get64 to vvp.def
2026-01-25 18:00:55 -08:00
vvp.man.in
Use autoconf variables in generated man and pdf output
2026-04-30 09:11:21 +02:00
words.cc
More cppcheck updates
2025-10-20 23:54:15 -07:00