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9-74 PPC405 Core User’s Manual
lbzx
Load Byte and Zero Indexed
lbzx
Load Byte and Zero Indexed
EA ← (RA|0) + (RB)
(RT)
←
24
0 || MS(EA,1)
An effective address (EA) is formed by adding an index to a base address. The index is the contents
of register RB. The base address is 0 if the RA field is 0 and is the contents of register RA otherwise.
The byte at the EA is extended to 32 bits by concatenating 24 0-bits to its left. The result is placed into
register RT.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
•RT
Invalid Instruction Forms
• Reserved fields
Architecture Note
This instruction is part of the PowerPC User Instruction Set Architecture.
lbzx RT,RA, RB
31 RT RA RB 87
0 6 11 16 21 31