SETD wanted

[skoe]

Hi all,

When I use the mnemonic SETD in a foobar.S file, I get:

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Error: no format matching for instruction 'setd'

the line in question is:

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setd r1, r0

What's wrong?

Edit: Problem solved with the help from the guys on IRC:

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setd res[r1], r0

It's also written in xas99.pdf, but I've read the architecture manual only.

[lilltroll]

I just have to show first time I can answer an asm quest :shock: :D

Its setd res[r1],r0

[JohnR]

Hi,

Maybe in the next documentation release, there could be an addition to section 19.2 Inline Assembly of the Tools User Guide that directs the reader to Section 8 XCore XS1 Instructions of the XS1 Assembly Language manual. And explain the use of the various forms of 'pointer', rs, dp, sp.

For instance what would be the corresponding 'inline asm' instruction for 'ldwp, d, dp[u16]'. I would guess -
asm (" ldwp %0, %dp[address]" : "=r"( result ) : "r"(address));

but I don't really know.

John.

[larry]

u16 is in this case an immediate. In the C compiler, we follow standard GCC rules, see for example

http://www.ibiblio.org/gferg/ldp/GCC-In ... HOWTO.html

In the XC compiler, immediates are not yet implemented (and must be hardcoded in the format string). They are high on the list of improvements to the XC compiler for future tools releases.

I believe you meant ldaw rather than ldwp. That would be:

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asm("ldaw %0, dp[%1]" : "=r"(result) : "i"(address))

Syntax is listed in the Assembly Language Manual.