Float to C double

> Am 14.06.2006 um 21:34 schrieb Bruno Luca:
>
>> On Wed, 14 Jun 2006 20:55:07 +0200, Bert Freudenberg <[hidden email]>  
>> wrote:
>>
>>> Yes. Squeak Floats are double precision IEEE numbers
>>
>> So if i need to pass a C float i need to call the primitive with a  
>> FloatArray?
>
> No. In the case of FFI, it converts from Squeak Floats to doubles or  
> floats as necessary depending on the ffi function declaration. If you  
> write a plugin, you just read a double from the stack and call the  
> function with a float, the conversion is inserted by the C compiler.
>
> - Bert -
>
>

> On Wed, 14 Jun 2006 22:09:17 +0200, Bert Freudenberg  
> <[hidden email]> wrote:
>
>> Am 14.06.2006 um 21:34 schrieb Bruno Luca:
>>
>>> On Wed, 14 Jun 2006 20:55:07 +0200, Bert Freudenberg  
>>> <[hidden email]> wrote:
>>>
>>>> Yes. Squeak Floats are double precision IEEE numbers
>>>
>>> So if i need to pass a C float i need to call the primitive with  
>>> a FloatArray?
>>
>> No. In the case of FFI, it converts from Squeak Floats to doubles  
>> or floats as necessary depending on the ffi function declaration.  
>> If you write a plugin, you just read a double from the stack and  
>> call the function with a float, the conversion is inserted by the  
>> C compiler.
>>
>> - Bert -
>
> I'm using this syntax:
> primitiveBla: aFloat boh: aDouble
> self primitive: 'primitiveBla' parameters: #(Float Float)
>
> Is that ok?

>
> Am 14.06.2006 um 22:14 schrieb Bruno Luca:
>
>> On Wed, 14 Jun 2006 22:09:17 +0200, Bert Freudenberg <[hidden email]>  
>> wrote:
>>
>>> Am 14.06.2006 um 21:34 schrieb Bruno Luca:
>>>
>>>> On Wed, 14 Jun 2006 20:55:07 +0200, Bert Freudenberg <[hidden email]>  
>>>> wrote:
>>>>
>>>>> Yes. Squeak Floats are double precision IEEE numbers
>>>>
>>>> So if i need to pass a C float i need to call the primitive with a  
>>>> FloatArray?
>>>
>>> No. In the case of FFI, it converts from Squeak Floats to doubles or  
>>> floats as necessary depending on the ffi function declaration. If you  
>>> write a plugin, you just read a double from the stack and call the  
>>> function with a float, the conversion is inserted by the C compiler.
>>>
>>> - Bert -
>>
>> I'm using this syntax:
>> primitiveBla: aFloat boh: aDouble
>> self primitive: 'primitiveBla' parameters: #(Float Float)
>>
>> Is that ok?
>
> I think it is, but you should look at the generated code to chck that  
> indeed the right conversion is performed:
>
> aDouble := interpreterProxy floatValueOf: aFloatOop
>
>> What about converting a double to a FloatObj?
>
> aFloatOop := interpreterProxy floatObjectOf: aDouble
>
> Bert -
>
>