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Re: [Pharo-project] gtinspector

by Alexandre Bergel

> Just to clarify: Most of the Glamour dependencies that are loaded by default are due to extra support like EyeSee, Mondrian and Magritte. If people do not want these, they do not have to be loaded. For example, to load just the basic Glamour, you can load it like: > (ConfigurationOfGlamour project version: 'default') load: {'Core'. 'Morphic'} The problem of dependencies is not their presence, but the time taken to load them. Removing EyeSee, Mondrian and Magritte from Glamour will not make Glamour better. However, having a smart cache mechanism on top of Metacello will definitely make all us happy. Having one single .mcz file to load instead for the whole version would be great. This should not be done by removing dependencies. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

Dec. 23, 2011

Re: [Pharo-project] Two complement smallInteger question

by StÃ©phane Ducasse

Hi stefan >> Because your source has a typo? Yes this is what I thought. or that people do not understand it :) >>> Now doing 5 - 15 does not (or I miss something ilke always subtracting the smaller one and taking the two complement of the smallerâ¦) >>> so does anybody has the answer on how to perform 5 - 15 ? > > http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction I already read it in the past but may be I'm blind normally a -b = a + b'two complement So they say it but do not really show it example: 15 â 35 = â20: they do the negation and I want to see how the two complement actually works for real on negative number results. 11100 0000 (borrow) 0000 1111 (15) â 0010 0011 (35) =========== 1110 1100 (â20) ok but this example does not show use of two' complement. so we have 15 0000 1111 (15) and 0010 0011 (35) 1101 1100 (35 bitInvert) 1101 1101 (35 bitInvert+ 1) =35 two complement 0011111 (carry) 0000 1111 (15) + 1101 1101 35two complement ----------------- 1111111101100 ok it works. I did a mistake probably yesterday evening when I was playing with another example. So thanks redoing another example removed my bug. > > Regards > Stefan > > > > > -- > Stefan Marr > Software Languages Lab > Vrije Universiteit Brussel > Pleinlaan 2 / B-1050 Brussels / Belgium > http://soft.vub.ac.be/~smarr > Phone: +32 2 629 2974 > Fax: +32 2 629 3525 > >

Dec. 23, 2011

Re: [Pharo-project] Two complement smallInteger question

by Stefan Marr

Hi: On 23 Dec 2011, at 12:49, StÃ©phane Ducasse wrote: > I read somewhere that in C short int range value are -32767 to +32767 > > http://www.ericgiguere.com/articles/ansi-c-summary.html > > And I was wondering why it does not follow the $-1 * 2^{N-1}\ to\ 2^{N-1}-1$ range encoding Because your source has a typo? Have a look into /usr/include/stdint.h that is what runs on your system... #define INT16_MAX 32767 #define INT16_MIN -32768 >> >> Now I have three questions: >> - is two complement used to manage small integers at VM level? It is done at the hardware level. Since C does not specify many things including signed overflows, I would assume they just map directly onto what the hardware provides. And for all practical purposes, two's complement is the standard. I am not aware of anything mainstream using one's complement. >> Now doing 5 - 15 does not (or I miss something ilke always subtracting the smaller one and taking the two complement of the smallerâ¦) >> so does anybody has the answer on how to perform 5 - 15 ? http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction Regards Stefan -- Stefan Marr Software Languages Lab Vrije Universiteit Brussel Pleinlaan 2 / B-1050 Brussels / Belgium http://soft.vub.ac.be/~smarr Phone: +32 2 629 2974 Fax: +32 2 629 3525

Dec. 23, 2011

Re: [Pharo-project] Two complement smallInteger question

by StÃ©phane Ducasse

I read somewhere that in C short int range value are -32767 to +32767 http://www.ericgiguere.com/articles/ansi-c-summary.html And I was wondering why it does not follow the $-1 * 2^{N-1}\ to\ 2^{N-1}-1$ range encoding Stef On Dec 23, 2011, at 11:35 AM, StÃ©phane Ducasse wrote: > Hi > > I'm doing a pass on the two complement chapter and small integer implementation and I wanted to check the SmallInteger>>primitiveAdd see below: > > stackIntegerValue extracts from a smalltalk integer the 31 encoding number bit. I imagine that this is correct. > > sqInt > stackIntegerValue(sqInt offset) { > DECL_MAYBE_SQ_GLOBAL_STRUCT > sqInt integerPointer; > integerPointer = longAt(GIV(stackPointer) + (offset * BytesPerWord)); > /* begin checkedIntegerValueOf: */ > if ((integerPointer & 1)) { > return (integerPointer >> 1); > } > else { > /* begin primitiveFail */ > if (GIV(primFailCode) == 0) { > GIV(primFailCode) = 1; > } > return 0; > } > } > > Now I have three questions: > - is two complement used to manage small integers at VM level? > I saw digitAdd on Integer and it deals with large integer. > > - integerResult = (stackIntegerValue(1)) + (stackIntegerValue(0)); > performs the real add. I imagine that it comes from plain C. Now does anybody has an idea > where I could find the definition of such + procedure? > In ANSI C > > - from the books, performing 54 - 5 is equivalent to adding the two complement > i.e. 54 + 5' (two complement) > this work well for 54 - 5 correct results and we can follow it looking at binary operations: > > (2r110110 - 2r101) bitString > --> '0000000000000000000000000110001' > (2r110110 bitString) > --> '0000000000000000000000000110110' > 2r101 bitString > --> '0000000000000000000000000000101' > 2r101 negated bitString > --> '1111111111111111111111111111011' > > Now doing 5 - 15 does not (or I miss something ilke always subtracting the smaller one and taking the two complement of the smallerâ¦) > so does anybody has the answer on how to perform 5 - 15 ? > > > > > > static void > primitiveAdd(void) { > DECL_MAYBE_SQ_GLOBAL_STRUCT > sqInt integerResult; > char *sp; > > /* begin pop2AndPushIntegerIfOK: */ > integerResult = (stackIntegerValue(1)) + (stackIntegerValue(0)); > if (GIV(primFailCode) == 0) { > if ((integerResult ^ (integerResult << 1)) >= 0) { > /* begin pop:thenPush: */ > longAtput(sp = GIV(stackPointer) + ((2 - 1) * BytesPerWord), ((integerResult << 1) | 1)); > GIV(stackPointer) = sp; > } > else { > /* begin success: */ > if (!(0)) { > if (GIV(primFailCode) == 0) { > > /* Don't overwrite an error code that has already been set. */ > > GIV(primFailCode) = 1; > } > } > } > } > } > > > Stef

Dec. 23, 2011

[Pharo-project] Two complement smallInteger question

by StÃ©phane Ducasse

Hi I'm doing a pass on the two complement chapter and small integer implementation and I wanted to check the SmallInteger>>primitiveAdd see below: stackIntegerValue extracts from a smalltalk integer the 31 encoding number bit. I imagine that this is correct. sqInt stackIntegerValue(sqInt offset) { DECL_MAYBE_SQ_GLOBAL_STRUCT sqInt integerPointer; integerPointer = longAt(GIV(stackPointer) + (offset * BytesPerWord)); /* begin checkedIntegerValueOf: */ if ((integerPointer & 1)) { return (integerPointer >> 1); } else { /* begin primitiveFail */ if (GIV(primFailCode) == 0) { GIV(primFailCode) = 1; } return 0; } } Now I have three questions: - is two complement used to manage small integers at VM level? I saw digitAdd on Integer and it deals with large integer. - integerResult = (stackIntegerValue(1)) + (stackIntegerValue(0)); performs the real add. I imagine that it comes from plain C. Now does anybody has an idea where I could find the definition of such + procedure? In ANSI C - from the books, performing 54 - 5 is equivalent to adding the two complement i.e. 54 + 5' (two complement) this work well for 54 - 5 correct results and we can follow it looking at binary operations: (2r110110 - 2r101) bitString --> '0000000000000000000000000110001' (2r110110 bitString) --> '0000000000000000000000000110110' 2r101 bitString --> '0000000000000000000000000000101' 2r101 negated bitString --> '1111111111111111111111111111011' Now doing 5 - 15 does not (or I miss something ilke always subtracting the smaller one and taking the two complement of the smallerâ¦) so does anybody has the answer on how to perform 5 - 15 ? static void primitiveAdd(void) { DECL_MAYBE_SQ_GLOBAL_STRUCT sqInt integerResult; char *sp; /* begin pop2AndPushIntegerIfOK: */ integerResult = (stackIntegerValue(1)) + (stackIntegerValue(0)); if (GIV(primFailCode) == 0) { if ((integerResult ^ (integerResult << 1)) >= 0) { /* begin pop:thenPush: */ longAtput(sp = GIV(stackPointer) + ((2 - 1) * BytesPerWord), ((integerResult << 1) | 1)); GIV(stackPointer) = sp; } else { /* begin success: */ if (!(0)) { if (GIV(primFailCode) == 0) { /* Don't overwrite an error code that has already been set. */ GIV(primFailCode) = 1; } } } } } Stef

Dec. 23, 2011

Re: [Pharo-project] Guess who is down?

by Fabrizio Perin

it will be up in minutes 2011/12/23 Luc Fabresse <luc.fabresse(a)gmail.com> > > 2011/12/14 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com> > >> Could someone push that reset button again please? :) > > > up. > thx to whom will do it ;-) > > Luc > > >> >> >> -- >> Bernat Romagosa. >> > >

Dec. 23, 2011

Re: [Pharo-project] Guess who is down?

by Luc Fabresse

2011/12/14 Bernat Romagosa <tibabenfortlapalanca(a)gmail.com> > Could someone push that reset button again please? :) up. thx to whom will do it ;-) Luc > > > -- > Bernat Romagosa. >

Dec. 23, 2011

Re: [Pharo-project] gtinspector

by Tudor Girba

Hi, On 22 Dec 2011, at 10:05, Mariano Martinez Peck wrote: > > > On Thu, Dec 22, 2011 at 12:28 AM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > Hi, > > On 21 Dec 2011, at 12:15, Mariano Martinez Peck wrote: > > > > > > > On Wed, Dec 21, 2011 at 9:01 AM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > > Hi, > > > > Just out of curiosity: Does any of you use the GTInspector? > > > > I used to use it for my images. And it was pretty nice. Problem was the amount of dependencies it had, the time it took me to install it, and moreover, that since it depends on several dependencies it was always complicated to successfully install it. Apart from that, I really like it. > > Thanks. What do you mean by complicated to install it? > > That each time I tried I found a problem. I don't remember exactly now. First, it was a problem with RB (which was used from Grease I think) which was not even loading in the image. Then it was the Keymappings which was broken and annoying ;) These are all fixed now. Actually, these issues got fixed within max 1 day from when they got detected. The Glamorous Toolkit is used in all Moose builds, so there is a high incentive for us to fix those problems. > I like the GTInspector and I like Glamour and all its related tools, but I always wondered the same: isn't there a way to use Glamour just for the development part? What I mean is that in this example of the GTInspector, it would be nice if you can generate from Glamour a plain standalone Morphic UI that we can just load. Say I have developed using glamour and all its nice features and then as an output I get a running morphic. Then of course, there will be people who will always want the glamour version because they change the code or whatever. Anyway, does it sound crazy to have a way to "deploy" Glamour? I do not see how it would be possible to do that. Glamour is a runtime engine, and as a consequence it is required to run the browser :). Just to clarify: Most of the Glamour dependencies that are loaded by default are due to extra support like EyeSee, Mondrian and Magritte. If people do not want these, they do not have to be loaded. For example, to load just the basic Glamour, you can load it like: (ConfigurationOfGlamour project version: 'default') load: {'Core'. 'Morphic'} Cheers, Doru > Where did you encounter problems? > > Cheers, > Doru > > -- > www.tudorgirba.com > > "Speaking louder won't make the point worthier." > > > > > > -- > Mariano > http://marianopeck.wordpress.com > -- www.tudorgirba.com "Don't give to get. Just give."

Dec. 23, 2011

Re: [Pharo-project] gtinspector

by Tudor Girba

Hi, Yes. It will load: Glamour (which loads Mondrian, EyeSee, Magritte and some of its unnecessary dependencies :)), and the Glamorous Toolkit itself which also depends on RPackage so that one will be loaded as well. Cheers, Doru On 23 Dec 2011, at 00:30, Sean P. DeNigris wrote: > > Tudor Girba-2 wrote >> >> You can load it in a Pharo 1.3 image by... >> > > Is everything loaded by that command necessary for Glamour and its toolkit? > e.g. Mondrian, EyeSee, Magritte > > -- > View this message in context: http://forum.world.st/gtinspector-tp4220848p4226991.html > Sent from the Pharo Smalltalk mailing list archive at Nabble.com. > -- www.tudorgirba.com "Yesterday is a fact. Tomorrow is a possibility. Today is a challenge."

Dec. 23, 2011

Re: [Pharo-project] gtinspector

by Sean P. DeNigris

Tudor Girba-2 wrote > > You can load it in a Pharo 1.3 image by... > Is everything loaded by that command necessary for Glamour and its toolkit? e.g. Mondrian, EyeSee, Magritte -- View this message in context: http://forum.world.st/gtinspector-tp4220848p4226991.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

Dec. 22, 2011