Mpylh, Multiply signed 16 lsb, Signed 16 msb mpylh – Texas Instruments TMS320C67X/C67X+ DSP User Manual
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Multiply Signed 16 LSB x Signed 16 MSB
MPYLH
3-161
Instruction Set
SPRU733
Multiply Signed 16 LSB
y
Signed 16 MSB
MPYLH
Syntax
MPYLH (.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 1 0 0 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
slsb16
xsmsb16
sint
.M1, .M2
Description
The src1 operand is multiplied by the src2 operand. The result is placed in dst.
The source operands are signed by default.
Execution
if (cond)
lsb16(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
MPYLHU, MPYLSHU, MPYLUHS, SMPYLH
Pipeline