GE 235 System Manual page 42

LDX
STX
SXG
Address Modification
Mnemonic Operand Index Time
Oper. Code Address Word Microsec.
-
Description
18 INCREMENT X. The constant K
is
added absolutely
to the contents of index word X, and the result re-
places the contents of X.
18 BRANCH I F X IS HIGH OR EQUAL. Contents of index
word X a r e tested for an equal to o r greater than K
condition. Branching follows the normal sequence of
branch instructions.
18 BRANCH I F X IS LOW. Contents of index word X a r e
tested for a l e s s than
K
condition. Branching follows
the normal sequence of branch instructions.
X 18 LOAD X. The contents of Y a r e placed in index word
X.
X 18 STORE
X.
The contents of index word X a r e stored
in Y.
12 INDEX GROUP SELECT. If additional index word
groups a r e available, this instruction selects one of
the 32 possible groups. Y (00
-
31) specifies the
particular group.
Auxiliary Arithmetic Instructions
AAU instructions for floating point operations assume that the operands to be acted upon a r e
already in floating point format. The operands a r e put in floating point format by means of a
subroutine furnished for this purpose.
Before giving an arithmetic instruction to the AAU i t i s necessary to s e t the mode of operation
by one of the following SET instructions:
Mnemonic Operand
Index Time
Oper. Code Address Word Microsec.
-
Description
U FLPOINT 6 This instruction s e t s the format f o r unnormalized
floating point operations.
NFLPOINT 6 This instruction sets the format for normalized
floating point operations.
FMPOINT 6 This instruction sets the format f o r double word
fixed point operations.
IY-17