GMS30C2216 Datasheet, PDF (308/320 Pages) Hynix Semiconductor – 16/32 BIT RISC/DSP

A-136
Store Word (stack address mode)
Appendix A. Instruction Set Details
STW.S
Format:
RRdis format
15
OP-code 1001 11
eS
DD
87
43
0
ds
Rd-code
Rs-code
dis1
dis2
s = 0: Rs-code encodes G0..G15 for Rs, s = 1: Rs-code encodes L0..L15 for Rs
d = 0: Rd-code encodes G0..G15 for Rd, d = 1: Rd-code encodes L0..L15 for Rd
S : Sign bit of dis, e = 0: dis = 20S // dis1(range -4,096..4,095)
e = 1: dis = 4S // dis1 // dis2 (range -268,435,456...268,435,455)
DD: D-code, D13..D12 encode data types at memory instructions
Notation:
STW.S Rd, Rs, dis
Description:
The Store instruction of stack address mode transfers data from into a register Rs into the
addressed memory location, Ld is used as an address.
The content of the destination register Rd is used as stack address, then Rd is incremented
by dis regardless of any exception occurred.
Operation:
Rd^ := Rs;
Rd := Rd + dis;
Exceptions:
None.