Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 110)

ADDAD Add Using Doubleword Addressing Mode
3-50 Instruction Set SPRU733
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 z dst src2 src1 op 1 0 0 0 0 s p
3 1 5 5 5 6 1 1
Opcode map field used... For operand type... Unit Opfield
src2
src1
dst sint
sint
sint .D1, .D2 11 1100
src2
src1
dst sint
ucst5
sint .D1, .D2 11 1101
Description 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.
Execution if (cond) src2 +(src1 tt 3) → dst
else nop
Pipeline
stage
E1
Read src1, src2
Written dst
Unit in use .D
Pipeline