Mpyhus, Multiply unsigned 16 msb, Signed 16 msb mpyhus – Texas Instruments TMS320C67X/C67X+ DSP User Manual
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MPYHUS
Multiply Unsigned 16 MSB x Signed 16 MSB
3-156
Instruction Set
SPRU733
Multiply Unsigned 16 MSB
y
Signed 16 MSB
MPYHUS
Syntax
MPYHUS (.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 0 1 0 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
umsb16
xsmsb16
sint
.M1, .M2
Description
The unsigned operand src1 is multiplied by the signed 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) × msb16(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
MPYH, MPYHU, MPYHSU
Pipeline