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stb
Store Byte
Preliminary PPC440x5 CPU Core User’s Manual
instrset.fm.
September 12, 2002 Page 409 of 589
stb
Store Byte
EA ← (RA|0) + EXTS(D)
MS(EA, 1)
← (RS)
24:31
An effective address (EA) is formed by adding a displacement to a base address. The displacement is
obtained by sign-extending the 16-bit D field to 32 bits. The base address is 0 when the RA field is 0, and is
the contents of register RA otherwise.
The least significant byte of register RS is stored into the byte at the EA.
Registers Altered
• None
stb RS, D(RA)
38 RS RA D
0 6 11 16 31