PPC assembly

Do anybody know what PPC command stw for example: stw r0,4(r11) do ? Are those two registers used as data registers or memory address registers in that example ?

@TSK

A quick search for: "powerpc stw" will get you links to websites that document the instruction set, including IBM's PowerPC stw page.

For your example:
Quote:

This would store the contents of register 0 into the address given by register 11 + an offset of 4. So if r0 = 100 and r11 = 9000 then this would write 100 to address 9004.

Hans

Hans already answered but for information on PowerPC, common integer registers (from r0 to r31) are called General Purpose Registers (GPR).
It was different on 680x0 where some registers where dedicated to be used with data or addresses.

Here, in the example given by Hans, if the next instruction where :
stw r11, 0(r11)
The value 9000 would be written at address 9000.

Last, stw means "store word"

You can fan many documents about PowerPC programming on Internet.

@Hans + corto

Thanks ! I thought to ask because I thought somebody might remember from memory and don't need to do any searching.

Quote:
I knew that somehow. So it depends on the command which register is used for data and which one for address.