Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 207)

Multiply Signed 16 MSB x Signed 16 MSB MPYH
3-147 Instruction Set SPRU733
Multiply Signed 16 MSB y Signed 16 MSB MPYH
Syntax MPYH (.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 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 smsb16
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) 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 MPYHU, MPYHSU, MPYHUS, SMPYH
Pipeline