Texas Instruments TMS320C67X/C67X+ DSP Car Speaker User Manual


 
Subtract Two Signed Integers With Saturation SSUB
3-235 Instruction SetSPRU733
Pipeline
Stage
E1
Read src1, src2
Written dst
Unit in use
.L
Instruction Type Single-cycle
Delay Slots 0
See Also SUB
Example 1
SSUB .L2 B1,B2,B3
Before instruction 1 cycle after instruction 2 cycles after instruction
B1
5A2E 51A3h
1512984995 B1 5A2E 51A3h B1 5A2E 51A3h
B2 802A 3FA2h 2144714846 B2 802A 3FA2h B2 802A 3FA2h
B3 xxxx xxxxh B3 7FFF FFFFh 2147483647 B3 7FFF FFFFh
CSR 0001 0100h CSR 0001 0100h CSR 0001 0300h Saturated
Example 2 SSUB .L1 A0,A1,A2
Before instruction 1 cycle after instruction 2 cycles after instruction
A0
4367 71F2h
1130852850 A0 4367 71F2h A0 4367 71F2h
A1 5A2E 51A3h 1512984995 A1 5A2E 51A3h A1 5A2E 51A3h
A2 xxxx xxxxh A2 E939 204Fh 382132145 A2 E939 204Fh
CSR 0001 0100h CSR 0001 0100h CSR 0001 0100h Not saturated
Pipeline