Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 310)

SUB Subtract Two Signed Integers Without Saturation
3-250 Instruction Set SPRU733
Opcode .S unit
31 29 28 27 23 22 18 17 13 12 11 6 5 4 3 2 1 0
creg z dst src2 src1 x op 1 0 0 0 s p
3 1 5 5 5 1 6 1 1
Opcode map field used... For operand type... Unit Opfield
src1
src2
dst sint
xsint
sint .S1, .S2 01 0111
src1
src2
dst scst5
xsint
sint .S1, .S2 01 0110
Description for .L1, .L2 and .S1, .S2 Opcodes
src2 is subtracted from src1. The result is placed in dst.
Execution for .L1, .L2 and .S1, .S2 Opcodes
if (cond)
src1 − src2 → dst
else nop