Texas Instruments TMS320C67X/C67X+ DSP Subtract Two Unsigned Integers Without Saturation, Subu

SUBU Subtract Two Unsigned Integers Without Saturation

				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	uint		.L1, .L2	010 1111
			src2	xuint
			dst	ulong
			src1	xuint		.L1, .L2	011 1111
			src2	uint
			dst	ulong

Description Execution

Pipeline

src2 is subtracted from src1. The result is placed in dst.

if (cond)

src1 − src2 → dst else nop

Pipeline	E1
Stage
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

3-266 Instruction Set SPRU733