Texas Instruments TMS320C67X/C67X+ DSP manual Add Using Doubleword Addressing Mode, Addad

ADDAD Add Using Doubleword Addressing Mode

				Add Using Doubleword Addressing Mode
ADDAD
Syntax					ADDAD (.unit) src2, src1, dst
					.unit = . D1 or .D2
Compatibility					C67x and C67x+ CPU
Opcode
31	29	28	27	23		22	18	17	13	12	7	6	5	4	3	2	1	0

creg

3

z

1

dst		src2	src1	op	1	0	0	0	0	s	p
5	5		5	6	1						1
	Opcode map field used...		For operand type...	Unit		Opfield
	src2		sint	.D1, .D2	11 1100
	src1		sint
	dst		sint
	src2		sint	.D1, .D2	11 1101
	src1		ucst5
	dst		sint

Description

Execution

Pipeline

src1 is added to src2 using the doubleword addressing mode specified for src2. The addition defaults to linear mode. However, if src2 is one of A4−A7 or B4−B7, the mode can be changed to circular mode by writing the appropri- ate value to the AMR (see section 2.7.3, page 2-10). src1 is left shifted by 3 due to doubleword data sizes. The result is placed in dst.

Note:

There is no SUBAD instruction.

if (cond) src2 +(src1 tt 3) → dst else nop

Pipeline	E1
stage
Read	src1, src2
Written	dst
Unit in use	.D

3-50 Instruction Set SPRU733