Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 214)

MPYHU Multiply Unsigned 16 MSB x Unsigned 16 MSB
3-154 Instruction Set SPRU733
Multiply Unsigned 16 MSB y Unsigned 16 MSB MPYHU
Syntax MPYHU (.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 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 umsb16
xumsb16
uint .M1, .M2
Description The src1 operand is multiplied by the src2 operand. The result is placed in dst.
The source operands are unsigned by default.
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, MPYHSU, MPYHUS
Example MPYHU .M1 A1,A2,A3
Before instruction 2 cycles after instruction
A1 0023 0000h 35 ‡ A1 0023 0000h
A2 FFA7 1234h 65447 ‡ A2 FFA7 1234h
A3 xxxx xxxxh A3 0022 F3D5h 2290645 §
‡ Unsigned 16-MSB integer
§ Unsigned 32-bit integer
Pipeline