luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Calculate the X output value from drive0 and drive1

This commit is contained in:
steve 2000-05-11 01:37:33 +00:00
parent 6021c7b192
commit d68339a96a
4 changed files with 30 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
vvm/vpi_bit.c
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vpi_bit.c,v 1.4 2000/05/09 21:16:35 steve Exp $"
#ident "$Id: vpi_bit.c,v 1.5 2000/05/11 01:37:33 steve Exp $"
#endif
# include "vpi_priv.h"
@ -28,7 +28,7 @@
* bits are identical. This means that the VSSSvsss bits of the 8bit
* value have V==v and SSS==sss.
*/
#define UNAMBIG(v) (((v)&0x0f) == (((v)>>4)&0x0f))
#define UNAMBIG(v) (! B_ISAMBIG(v))
# define STREN1(v) ( ((v)&0x80)? ((v)&0xf0) : (0x70 - ((v)&0xf0)) )
@ -134,6 +134,9 @@ vpip_bit_t vpip_bits_resolve(const vpip_bit_t*bits, unsigned nbits)
/*
* $Log: vpi_bit.c,v $
* Revision 1.5 2000/05/11 01:37:33 steve
* Calculate the X output value from drive0 and drive1
*
* Revision 1.4 2000/05/09 21:16:35 steve
* Give strengths to logic and bufz devices.
*

18
vvm/vpi_priv.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vpi_priv.h,v 1.19 2000/05/09 21:16:35 steve Exp $"
#ident "$Id: vpi_priv.h,v 1.20 2000/05/11 01:37:33 steve Exp $"
#endif
/*
@ -87,15 +87,24 @@ typedef unsigned char vpip_bit_t;
# define StX 0xe6
# define HiZ 0x08
/* Compare the logic values of two vpip_bit_t variables, or test
the logical value of the bit. */
/* Compare the logic values of two vpip_bit_t variables. This
is like the === operator of Verilog, it ignored strengths. */
# define B_EQ(l,r) (((l)&0x88) == ((r)&0x88))
/* Test and return true if the value has ambiguous
strength. The logic value may yet be knowable. */
# define B_ISAMBIG(v) (((v)&0x0f) != (((v)>>4)&0x0f))
/* Test whether the value is of the specified logic value. It
is possible for even ambiguous signals to have a known
logic value. */
# define B_IS0(v) (((v)&0x88) == 0x00)
# define B_IS1(v) (((v)&0x88) == 0x88)
# define B_ISX(v) (((v)&0x88) == 0x80)
# define B_ISZ(v) ((v) == HiZ)
# define B_ISXZ(v) (1 & (((v)>>7) ^ ((v)>>3)))
/* Take as input an array of bits, and return the resolved
value. The result accounts for the strengths involved. */
extern vpip_bit_t vpip_pair_resolve(vpip_bit_t a, vpip_bit_t b);
@ -368,6 +377,9 @@ extern int vpip_finished();
/*
* $Log: vpi_priv.h,v $
* Revision 1.20 2000/05/11 01:37:33 steve
* Calculate the X output value from drive0 and drive1
*
* Revision 1.19 2000/05/09 21:16:35 steve
* Give strengths to logic and bufz devices.
*

12
vvm/vvm_gates.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vvm_gates.cc,v 1.15 2000/05/09 21:16:35 steve Exp $"
#ident "$Id: vvm_gates.cc,v 1.16 2000/05/11 01:37:33 steve Exp $"
#endif
# include "vvm_gates.h"
@ -52,16 +52,13 @@ vvm_1bit_out::~vvm_1bit_out()
void vvm_1bit_out::drive0(vpip_bit_t v)
{
drive0_ = v;
driveX_ = (drive1_&0xf0) | (drive0_&0x0f);
}
void vvm_1bit_out::drive1(vpip_bit_t v)
{
drive1_ = v;
}
void vvm_1bit_out::driveX(vpip_bit_t v)
{
driveX_ = v;
driveX_ = (drive1_&0xf0) | (drive0_&0x0f);
}
void vvm_1bit_out::driveZ(vpip_bit_t v)
@ -353,6 +350,9 @@ void vvm_not::take_value(unsigned, vpip_bit_t val)
/*
* $Log: vvm_gates.cc,v $
* Revision 1.16 2000/05/11 01:37:33 steve
* Calculate the X output value from drive0 and drive1
*
* Revision 1.15 2000/05/09 21:16:35 steve
* Give strengths to logic and bufz devices.
*

6
vvm/vvm_gates.h
View File

@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: vvm_gates.h,v 1.62 2000/05/09 21:16:35 steve Exp $"
#ident "$Id: vvm_gates.h,v 1.63 2000/05/11 01:37:33 steve Exp $"
#endif
# include "vvm.h"
@ -71,7 +71,6 @@ class vvm_1bit_out : public vvm_nexus::drive_t {
void drive0(vpip_bit_t);
void drive1(vpip_bit_t);
void driveX(vpip_bit_t);
void driveZ(vpip_bit_t);
private:
@ -940,6 +939,9 @@ class vvm_posedge : public vvm_nexus::recvr_t {
/*
* $Log: vvm_gates.h,v $
* Revision 1.63 2000/05/11 01:37:33 steve
* Calculate the X output value from drive0 and drive1
*
* Revision 1.62 2000/05/09 21:16:35 steve
* Give strengths to logic and bufz devices.
*