Request PPC help

[Justtestingit DF Member Posts:101 Threads:3 Reputation 0]

can anyone explain to me what extsw does i am learning PowerPC and i have an instruction "extsw r3, r3" ive looked on IBM website but it is sometimes hard to understand the website id really appreciate it if anyone can provide any help in general on PPC or on this particular instruction.

Thanks in advance :)

[DewRific DF Member Posts:357 Threads:70 Reputation 7]

can anyone explain to me what extsw does i am learning PowerPC and i have an instruction "extsw r3, r3" ive looked on IBM website but it is sometimes hard to understand the website id really appreciate it if anyone can provide any help in general on PPC or on this particular instruction.

Thanks in advance :)

this might help  https://community.wemod.com/t/powerpc-be...orial/2039

[pdb Banned Posts:70 Threads:1 Reputation 7]

If your 32 bit value is 0x80000000 or greater, the result will be 0xFFFFFFFF00000000 + original value
If your 32 bit value is 0x7FFFFFFF or less, the result will be the exact same as the original value

[Cane DF Member Posts:35 Threads:3 Reputation 8]

maybe this could help yous https://imgur.com/npJC8Co

[NoNameV2345 Banned Posts:556 Threads:12 Reputation 5]

can anyone explain to me what extsw does i am learning PowerPC and i have an instruction "extsw r3, r3" ive looked on IBM website but it is sometimes hard to understand the website id really appreciate it if anyone can provide any help in general on PPC or on this particular instruction.

Thanks in advance :)

this might help  https://community.wemod.com/t/powerpc-be...orial/2039

thx

[Kyle Smacker Solutions Posts:278 Threads:17 Reputation 37]

do you know what the r's mean, as id learn what they are first

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check this out anyways
http://www.tentech.ca/downloads/other/PP...2_2010.pdf

[Justtestingit DF Member Posts:101 Threads:3 Reputation 0]

do you know what the r's mean, as id learn what they are first

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check this out anyways
http://www.tentech.ca/downloads/other/PP...2_2010.pdf

yeah they are registers i know basic stuff just some instructions are tricky to understand :P thanks for the link it looks very helpful

Thanks for your help :)

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maybe this could help yous https://imgur.com/npJC8Co

very funny but if you are not going to give a serious answer dont waste your time replying thanks

[Justtestingit DF Member Posts:101 Threads:3 Reputation 0]

can anyone explain to me what extsw does i am learning PowerPC and i have an instruction "extsw r3, r3" ive looked on IBM website but it is sometimes hard to understand the website id really appreciate it if anyone can provide any help in general on PPC or on this particular instruction.

Thanks in advance :)

this might help  https://community.wemod.com/t/powerpc-be...orial/2039

thanks for your help i appreciate it :)

[Justtestingit DF Member Posts:101 Threads:3 Reputation 0]

If your 32 bit value is 0x80000000 or greater, the result will be 0xFFFFFFFF00000000 + original value
If your 32 bit value is 0x7FFFFFFF or less, the result will be the exact same as the original value

Thanks for your reply, here is more info about it 

 the value of r3 in this case can be anything from 0 - 17 (i think) and the first instruction using r3 is the "extsw r3, r3" which im unsure about what it does then further down the result in r3 is then cmpwi cr6, r3, 0 then a beq instruction which i understand what cmpwi does just not extsw

[MaxModz DF Member Posts:180 Threads:9 Reputation -6]

can anyone explain to me what extsw does i am learning PowerPC and i have an instruction "extsw r3, r3" ive looked on IBM website but it is sometimes hard to understand the website id really appreciate it if anyone can provide any help in general on PPC or on this particular instruction.

Thanks in advance :)

this might help  https://community.wemod.com/t/powerpc-be...orial/2039

Thank You, I don't have any use for ppc right now but if i do ill definitely look at this.