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SADD Add Two Signed Integers With Saturation
3-206 Instruction Set SPRU733
Pipeline
Stage
E1
Read src1, src2
Written dst
Unit in use
.L
Instruction Type Single-cycle
Delay Slots 0
See Also ADD, SSUB
Example 1
SADD .L1 A1,A2,A3
Before instruction 1 cycle after instruction 2 cycles after instruction
A1
5A2E 51A3h
1512984995 A1 5A2E 51A3h A1 5A2E 51A3h
A2 012A 3FA2h 19546018 A2 012A 3FA2h A2 012A 3FA2h
A3 xxxx xxxxh A3 5B58 9145h 1532531013 A3 5B58 9145h
CSR 0001 0100h CSR 0001 0100h CSR 0001 0100h Not saturated
Example 2 SADD .L1 A1,A2,A3
Before instruction 1 cycle after instruction 2 cycles after instruction
A1
4367 71F2h
1130852850 A1 4367 71F2h A1 4367 71F2h
A2 5A2E 51A3h 1512984995 A2 5A2E 51A3h A2 5A2E 51A3h
A3 xxxx xxxxh A3 7FFF FFFFh 2147483647 A3 7FFF FFFFh
CSR 0001 0100h CSR 0001 0100h CSR 0001 0300h Saturated
Pipeline