tm1300 NXP Semiconductors, tm1300 Datasheet - Page 408

• Manufacturer Part Number: tm1300
• Description: Tm-1300 Media Processor
• Manufacturer: NXP Semiconductors

TM1300 Data Book
isub
SYNTAX
FUNCTION
DESCRIPTION
either both signed or unsigned integers. No overflow or underflow detection is performed.
modification of the destination register. If the LSB of r guard is 1, r dest is written; otherwise, r dest is not changed.
EXAMPLES
A-122
r30 = 3, r40 = 4
r10 = 0, r60 = 0x100, r30 = 3
r20 = 1, r50 = 0x1000, r60 = 0x100
r70 = 0x80000000, r40 = 4
The
The
[ IF r guard ] isub r src1 r src2
if r guard then
r dest
isub
isub
Initial Values
r src1 – r src2
operation computes the difference r src1 –r src2 and writes the result into r dest . The operands can be
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
PRODUCT SPECIFICATION
isub r30 r40
IF r10 isub r60 r30
IF r20 isub r50 r60
isub r70 r40
r dest
Operation
r80
r100
r50
r90
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r80
no change, since guard is false
r90
r100
isubi borrow dspisub
Philips Semiconductors
0xffffffff
0xf00
dspidualsub fsub
0x7ffffffc
ATTRIBUTES
SEE ALSO
Result
Subtract
1, 2, 3, 4, 5
alu
No
13
—
2
1