| Add Proposal | Add Analysis | Edit Class, Environment, or Release |
| Number | 588
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| Category | enhancement
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| Synopsis | Add ranges to case_item expressions
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| State | open
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| Class | enhancement
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| Arrival-Date | Jun 14 2004
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| Originator | Shalom Bresticker <Shalom.Bresticker@freescale.com>
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| Release | 2001b
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| Description |
In a case statement, case (A) item1: item2: ... default: endcase If I want to ask whether A is between 4 and 10, for example, I have to write 4,5,6,7,8,9,10: This request is for a way to write something like [4:10]:, which would mean the range between 4 and 10, inclusive. Steven Sharp said this should be fairly easy, and it is very useful, so it should be HIGH priority. Shalom |
| Fix |
Unknown |
| Audit-Trail |
From: Krishna Garlapati <krishna@synplicity.com> To: Shalom Bresticker <Shalom.Bresticker@freescale.com> Cc: etf-bugs@boyd.com Subject: Re: enhancement/588: Add ranges to case_item expressions Date: Mon, 14 Jun 2004 18:58:04 +0530 This is a multi-part message in MIME format. --------------000707080807060608070008 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit I am guessing this means the range should contain simple constant expressions. It's possible to write something like: case(foo) [3'b001-3'b010]: endcase I guess a range of dis-similar number types like: case foo [2-4'b1111]: endcase can be legal, but not some thing like: case(foo) [2.12-4'b1000]: endcase -Krishna. Shalom Bresticker wrote: >>Number: 588 >>Category: enhancement >>Originator: Shalom Bresticker <Shalom.Bresticker@freescale.com> >>Description: >> >> > >In a case statement, > >case (A) >item1: >item2: >.. >default: >endcase > >If I want to ask whether A is between 4 and 10, for example, I have to write > >4,5,6,7,8,9,10: > >This request is for a way to write something like [4:10]:, >which would mean the range between 4 and 10, inclusive. > >Steven Sharp said this should be fairly easy, and it is very useful, so it >should be HIGH priority. > >Shalom > > > > > --------------000707080807060608070008 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> I am guessing this means the range should contain simple constant expressions. It's possible to write something like: case(foo) [3'b001-3'b010]: endcase I guess a range of dis-similar number types like: case foo [2-4'b1111]: endcase can be legal, but not some thing like: case(foo) [2.12-4'b1000]: endcase -Krishna. Shalom Bresticker wrote: <blockquote cite="mid200406141300.i5ED00sF021992@wa.boyd.com" type="cite"> <blockquote type="cite"> <pre wrap="">Number: 588 Category: enhancement Originator: Shalom Bresticker <a class="moz-txt-link-rfc2396E" href="mailto:Shalom.Bresticker@freescale.com"><Shalom.Bresticker@freescale.com> Description: <pre wrap=""><!----> In a case statement, case (A) item1: item2: .. default: endcase If I want to ask whether A is between 4 and 10, for example, I have to write 4,5,6,7,8,9,10: This request is for a way to write something like [4:10]:, which would mean the range between 4 and 10, inclusive. Steven Sharp said this should be fairly easy, and it is very useful, so it should be HIGH priority. Shalom --------------000707080807060608070008-- From: Shalom.Bresticker@freescale.com To: Krishna Garlapati <krishna@synplicity.com> Cc: etf-bugs@boyd.com Subject: Re: enhancement/588: Add ranges to case_item expressions Date: Mon, 14 Jun 2004 16:33:37 +0300 (IDT) Yes, that's the idea. Shalom On Mon, 14 Jun 2004, Krishna Garlapati wrote: > I am guessing this means the range should contain simple constant > expressions. > It's possible to write something like: > > case(foo) > [3'b001-3'b010]: > endcase > > I guess a range of dis-similar number types like: > > case foo > [2-4'b1111]: > endcase > > can be legal, but not some thing like: > > case(foo) > [2.12-4'b1000]: > endcase |
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