Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 326)

SUBU Subtract Two Unsigned Integers Without Saturation
3-266 Instruction Set SPRU733
Subtract Two Unsigned Integers Without Saturation SUBU
Syntax SUBU (.unit) src1, src2, dst
.unit = .L1 or .L2
Compatibility C62x, C64x, C67x, and C67x+ CPU
Opcode
31 29 28 27 23 22 18 17 13 12 11 5 4 3 2 1 0
creg z dst src2 src1 x op 1 1 0 s p
3 1 5 5 5 1 7 1 1
Opcode map field used... For operand type... Unit Opfield
src1
src2
dst uint
xuint
ulong .L1, .L2 010 1111
src1
src2
dst xuint
uint
ulong .L1, .L2 011 1111
Description src2 is subtracted from src1. The result is placed in dst.
Execution if (cond)
src1 − src2 → dst
else nop
Pipeline
Stage
E1
Read src1, src2
Written dst
Unit in use .L
Instruction Type Single-cycle
Delay Slots 0
See Also ADDU, SSUB, SUB, SUBC, SUBDP, SUBSP, SUB2
Pipeline