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extsb
Extend Sign Byte
Preliminary PPC440x5 CPU Core User’s Manual
instrset.fm.
September 12, 2002 Page 311 of 589
extsb
Extend Sign Byte
(RA) ← EXTS(RS)
24:31
The least significant byte of register RS is sign-extended to 32 bits by replicating bit 24 of the register into bits
0 through 23 of the result. The result is placed into register RA.
Registers Altered
•RA
• CR[CR0] if Rc contains 1
Invalid Instruction Forms
• Reserved fields
extsb RA, RS Rc=0
extsb. RA, RS Rc=1
31 RS RA 954 Rc
0 6 11 16 21 31