Texas Instruments TMS320C67X/C67X+ DSP manual Mpyhu, Multiply Unsigned 16 MSB y Unsigned 16 MSB

MPYHU Multiply Unsigned 16 MSB x Unsigned 16 MSB

MPYHU				Multiply Unsigned 16 MSB y Unsigned 16 MSB
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	umsb16		.M1, .M2
			src2	xumsb16
			dst	uint

Description

Execution

Pipeline

The src1 operand is multiplied by the src2 operand. The result is placed in dst. The source operands are unsigned by default.

if (cond)	msb16(src1) ⋅ msb16(src2) → dst
else nop
Pipeline	E1	E2
Stage
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
	A1		35‡
		0023 0000h		A1
			65447‡
	A2	FFA7 1234h		A2
	A3	xxxx xxxxh		A3

‡Unsigned 16-MSB integer § Unsigned 32-bit integer

2 cycles after instruction

0023 0000h

FFA7 1234h

0022 F3D5h 2290645§

3-154 Instruction Set SPRU733