Hello,
I am novice in Power PC assembly code and I am trying
compile in following code (written by someone else)
into head_8xx.S.
This function has instruction like
mfspr r3, IC_CST
LA r4, IC_CST_LEN
However the hardhat assembler doesn't understand the
mnemonic LA, is LA same as add immediate instruction?
addi r4, r4, IC_CST_LEN
Please help!!
Thanks.
M.J.
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Jones Madhuri wrote:
I am novice in Power PC assembly code and I am trying
compile in following code (written by someone else)
into head_8xx.S.
Novice or otherwise, you shouldn't be placing any code in
head_8xx.S. It's a guarantee you won't get Linux to boot.
mfspr r3, IC_CST
LA r4, IC_CST_LEN
However the hardhat assembler doesn't understand the
mnemonic LA,
Because there is no such instruction. It looks like a
macro that will result in the two instruction pair:
lis r4, IC_CST_LEN@h
ori r4, r4, IC_CST_LEN@l
You shouldn't be messing around with those cache
management registers......
-- Dan
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hi madhuri,
The LA here is a macro. I am not sure about the linux. but in the
pSOS+ i have seen a macro written in assembly language, which does the
'loading of address to a register' job.
Just check the assembly source files, you may find macro something like this.
.macro LA reg,symbol
lis reg,%hiadj(symbol)
addi reg,reg,%lo(symbol)
.endm
such macros are written to load the value(constant) in to a register.
cheers,
srini...
On Tue, 27 Mar 2001, Jones Madhuri wrote:
Hello,
I am novice in Power PC assembly code and I am trying
compile in following code (written by someone else)
into head_8xx.S.
This function has instruction like
mfspr r3, IC_CST
LA r4, IC_CST_LEN
However the hardhat assembler doesn't understand the
mnemonic LA, is LA same as add immediate instruction?
addi r4, r4, IC_CST_LEN
Please help!!
Thanks.
M.J.
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http://personal.mail.yahoo.com/?.refer=text
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