Armin Rigo wrote:
> Hi Richard,
>
> On Wed, Jun 27, 2007 at 01:55:13PM -0700, Richard Emslie wrote:
>
>>>> bytecode that genllvm produces would then call the helper functions
>>>> instead of calling directly the external C API. Shouldn't be a
>>>> performance problem as llvm will inline the helpers agressively.
>>>>
>>>>
>>> ok, that is somewhat what we have now - except the stub functions
>>> are high level and shared *somewhat* with genc.
>>>
>
> Precisely, by contrast I'm thinking about having lower level stub
> functions that are generated automatically from the lltype declarations.
> For example, an external ll function ptr would generate a simple stub,
> always the same. GenC and GenLLVM would share the code to produce the
> stubs. Similarly, getting at an external variable (or variable-like
> macro) like errno should be expressable in an lltype way (it's not right
> now) that gets turned into """int _rpyget_errno(void) { return errno; }""".
>
Just a little correction - you can express c-level constant in lltype.
There is CConstant class for that.
Cheers,
fijal
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