Mpyhslu, Multiply signed 16 msb, Unsigned 16 lsb mpyhslu – Texas Instruments TMS320C67X/C67X+ DSP User Manual
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MPYHSLU
Multiply Signed 16 MSB x Unsigned 16 LSB
3-152
Instruction Set
SPRU733
Multiply Signed 16 MSB
y
Unsigned 16 LSB
MPYHSLU
Syntax
MPYHSLU (.unit) src1, src2, dst
.unit = .M1 or .M2
Compatibility
C62x, C64x, C67x, and C67x+ CPU
Opcode
31
29
28
27
23
22
18
17
13
12
11
7
6
5
4
3
2
1
0
creg
z
dst
src2
src1
x 0 1 0 1 1 0 0 0 0 0 s p
3
1
5
5
5
1
1
1
Opcode map field used...
For operand type...
Unit
src1
src2
dst
smsb16
xulsb16
sint
.M1, .M2
Description
The signed operand src1 is multiplied by the unsigned operand src2. The result
is placed in dst. The S is needed in the mnemonic to specify a signed operand
when both signed and unsigned operands are used.
Execution
if (cond)
msb16(src1) × lsb16(src2)
→
dst
else nop
Pipeline
Stage
E1
E2
Read
src1, src2
Written
dst
Unit in use
.M
Instruction Type
Multiply (16 × 16)
Delay Slots
1
See Also
MPYHL, MPYHLU, MPYHULS
Pipeline