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Re: [Tinycc-devel] can't build mob branch on x86 64
From: |
Daniel Glöckner |
Subject: |
Re: [Tinycc-devel] can't build mob branch on x86 64 |
Date: |
Mon, 7 Feb 2011 23:48:30 +0100 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Mon, Feb 07, 2011 at 10:03:44PM +0100, Thomas Preud'homme wrote:
> Le lundi 07 février 2011 20:23:44, grischka a écrit :
> > In the spirit of tinyness I'd strongly suggest to cultivate the positive
> > power of strategical assumptions and to assume simply that tcc already
> > does support alloca everywhere.
> >
> > --- grischka
> And what is the solution for architectures which don't support alloca *yet*.
> FYI, adding the CONFIG_TCC_ALLOCA (which I renamed to TCC_AVAIL_ALLOCA) is
> like 5-6 lines added.
Here is my four line version of alloca for ARM:
void *alloca(unsigned n)
{
return (void *)((&n)[-2]=((&n)[-2]-n)&~7);
}
It relies heavily on the stackframe created by tcc.
The more compiler independent assembler version of it is this:
.globl alloca
alloca: sub r0, sp, r0
bic r0, r0, #7
mov sp, r0
mov pc, lr
Daniel
- Re: [Tinycc-devel] can't build mob branch on x86 64, (continued)
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/04
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/04
- Re: [Tinycc-devel] can't build mob branch on x86 64, grischka, 2011/02/05
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/05
- Re: [Tinycc-devel] can't build mob branch on x86 64, Joe Soroka, 2011/02/06
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/06
- Re: [Tinycc-devel] can't build mob branch on x86 64, Joe Soroka, 2011/02/06
- Re: [Tinycc-devel] can't build mob branch on x86 64, grischka, 2011/02/07
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/07
- Re: [Tinycc-devel] can't build mob branch on x86 64, grischka, 2011/02/07
- Re: [Tinycc-devel] can't build mob branch on x86 64,
Daniel Glöckner <=
- Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/04
Re: [Tinycc-devel] can't build mob branch on x86 64, Thomas Preud'homme, 2011/02/04