Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### VECBK

Prolog

Control Block Contents
VECBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### VECBK Prolog

     NAME       : HCPVECBK
     DESCRIPTION: Guest Vector Facility Control Block
     DSECT      : VECBK
     FUNCTION   : HCPVECBK is the primary control block for a virtual
                  CPU's Vector Facility.  It contains or refers to
                  all guest Vector Facility registers, plus additional
                  vector activity counters.
     LOCATED BY : VMDVECTR in the VMBDK of the owning virtual CPU.
     CREATED BY : HCPVFVIN - Virtual Vector Facility initialization.
     DELETED BY : HCPVFVDE - Virtual Vector Facility de-initialization.
     SERIALIZED : Most fields in the VECBK are manipulated under
                  "guest vector state serialization": when the
                  guest vector facility is loaded into a real
                  processor, the serialization is processor-local on
                  that processor; otherwise, the serialization is
                  guest instruction stream (VMDSIMWT) or console
                  function mode.

#### VECBK Control Block Content

#### VECBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      VECBK          Guest Vector Facility Control
                                            Block
    0000    0 Address      4 VECVSATB       Pointer to the Vector Register
                                            Save Area block
    0004    4 Signed       4 *              Reserved for future IBM use
    0008    8 Dbl-Word     8 VECVSR (0)     Guest Vector Status Register:
    0008    8 Bitstring    1 *              ..Reserved for future IBM use
    0009    9 Bitstring    1 VECVSRMO       ..Vector mode flags
              .... ...1      VECVSRMM       X'01' ....Vector Mask Mode
    000A   10 Signed       2 VECVSRCT       ..Vector Count (of elements to
                                            ..participate in operations)
    000C   12 Signed       2 VECVSRIX       ..Vector Interruption Index (next
                                            ..element number)
    000E   14 Signed       2 VECVSRIC (0)   ..Vector In-Use and Change mask
    000E   14 Bitstring    1 VECVSRIU       ....Vector In-Use mask (one bit
                                            ....per VR pair)
    000F   15 Bitstring    1 VECVSRCH       ....Vector Change mask (one bit
                                            ....per VR pair)
    0010   16 Signed       8 VECVAC         Guest Vector Activity Count
    0018   24 Signed       8 VECVACOL       Guest Vector Activity Count at
                                            the time of last updating of
                                            accounting values
    0020   32 Signed       8 VECDVAC        Guest Vector Activity Count at
                                            the start of the timeslice
    0028   40 Signed       2 VECVCP (0)     Vector change preservation area
    0028   40 Bitstring    1 VECVHC         Vector host change preservation
    0029   41 Bitstring    1 VECVGC         Vector guest change preservation
    002A   42 Signed       2 *              Reserved for future IBM use
    002C   44 Signed       4 *              Reserved for future IBM use
              00000006       VECSIZE        (*-VECBK+7)/8 size of VECBK in
                                            doublewords excluding VECVMR
    0030   48 Bitstring    1 VECVMR (0)     Guest Vector Mask Register the
                                            size of VECVMR is (section size /
                                            2) bytes

#### VECBK Storage Layout

    *** VECBK - Guest Vector Facility Control Block
    *
    *     +---------------------------+---------------------------+
    *   0 |         VECVSATB          |///////////////////////////|
    *     +------+------+-------------+-------------+------+------+
    *   8 |//////|:VSRMO|  VECVSRCT   |  VECVSRIX   |:VSRIU|:VSRCH|
    *     +------+------+-------------+-------------+------+------+
    *  10 |                        VECVAC                         |
    *     +-------------------------------------------------------+
    *  18 |                       VECVACOL                        |
    *     +-------------------------------------------------------+
    *  20 |                       VECDVAC                         |
    *     +------+------+-------------+---------------------------+
    *  28 |VECVHC|VECVGC|/////////////|///////////////////////////|
    *     +------+------+-------------+---------------------------+
    *
    *** VECBK - Guest Vector Facility Control Block

#### VECBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    VECDVAC        0020
    VECSIZE        002C 00000006
    VECVAC         0010
    VECVACOL       0018
    VECVCP         0028
    VECVGC         0029
    VECVHC         0028
    VECVMR         0030
    VECVSATB       0000
    VECVSR         0008
    VECVSRCH       000F
    VECVSRCT       000A
    VECVSRIC       000E
    VECVSRIU       000E
    VECVSRIX       000C
    VECVSRMM       0009 01
    VECVSRMO       0009

This information is based on z/VM V4R3.0. Last updated on 1 May 2002 at 10:51:56 EDT.
Copyright IBM Corporation, 1990, 2002