tm1300 NXP Semiconductors, tm1300 Datasheet - Page 402

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

TM1300 Data Book
imul
SYNTAX
FUNCTION
DESCRIPTION
full 64-bit product into r dest . The operands are considered signed 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-116
r60 = 0x100
r10 = 0, r60 = 0x100, r30 = 0xf11
r20 = 1, r60 = 0x100, r30 = 0xf11
r70 = 0xffffff00, r40 = 0xffffff9c
As shown below, the
The
[ IF r guard ] imul r src1 r src2
if r guard then
r src1
temp
r dest
64-bit result
imul
3
Initial Values
(sign_ext32to64(r src1 )
temp<31:0>
operation optionally takes a guard, specified in r guard . If a guard is present, its LSB controls the
6
imul
signed
PRODUCT SPECIFICATION
operation computes the product r src1 r src2 and writes the least-significant 32 bits of the
r dest
sign_ext32to64(r src2 ))
imul r60 r60
IF r10 imul r60 r30
IF r20 imul r60 r30
imul r70 r40
3
r dest
0
Operation
signed
signed
r80
r100
3
r src2
3
r50
r90
0
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
r80
no change, since guard is false
r90
r100
umul imulm umulm dspimul
signed
dspumul dspidualmul
Philips Semiconductors
0x10000
0xf1100
quadumulmsb fmul
0x6400
Signed multiply
ATTRIBUTES
SEE ALSO
Result
0
ifmul
2, 3
No
27
—
0
2
3