Mpyhus (Multiply Unsigned 16 Msb By Signed 16 Msb) - Texas Instruments TMS320C67X Reference Manual

MPYHUS
Multiply Unsigned 16 MSB x Signed 16 MSB
MPYHUS
Syntax
Compatibility
Opcode
31 29 28 27
creg z dst
3 1 5
Description
Execution
Pipeline
Instruction Type
Delay Slots
See Also
3-156 Instruction Set
Multiply Unsigned 16 MSB
MPYHUS (.unit) src1, src2, dst
.unit = .M1 or .M2
C62x, C64x, C67x, and C67x+ CPU
23 22 18
src2
5
Opcode map field used...
src1
src2
dst
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.
if (cond) msb16(src1) × msb16(src2)
else nop
Pipeline
Stage E1
Read src1, src2
Written
Unit in use .M
Multiply (16 × 16)
1
MPYH, MPYHU, MPYHSU
y
Signed 16 MSB
17 13 12 11
src1 x 0
5 1
For operand type...
umsb16
xsmsb16
sint
dst
→
E2
dst
7 6 5 4 3
0 1 0 1 0 0 0 0 0 s p
Unit
.M1, .M2
SPRU733
2 1 0
1 1