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Re: [patch] libc/sys/h8300hms/crt0.S: Optimize.
- To: Kazu Hirata <kazu at hxi dot com>
- Subject: Re: [patch] libc/sys/h8300hms/crt0.S: Optimize.
- From: "J. Johnston" <jjohnstn at cygnus dot com>
- Date: Wed, 30 Aug 2000 18:22:52 -0400
- CC: newlib at sources dot redhat dot com
- Organization: Red Hat Inc.
- References: <200008302006.NAA17505@cygnus.com>
Kazu Hirata wrote:
>
> Hi,
>
> Attached is a patch to optimize libc/sys/h8300hms/crt0.S.
>
> OK to apply? (I think I have a write access.)
>
I have checked in the patch.
Regards,
-- Jeff Johnston (Red Hat Inc.)
> Thanks,
>
> Kazu Hirata
>
> ===File ~/gnu/newlib/ChangeLog-crt0.S=======================
> 2000-08-30 Kazu Hirata <kazu@hxi.com>
>
> * libc/sys/h8300hms/crt0.S: Optimize for both speed and code size.
>
> ============================================================
>
> ===File ~/gnu/newlib/crt0.S.patch===========================
> Index: crt0.S
> ===================================================================
> RCS file: /cvs/src/src/newlib/libc/sys/h8300hms/crt0.S,v
> retrieving revision 1.1.1.1
> diff -u -r1.1.1.1 crt0.S
> --- crt0.S 2000/02/17 19:39:50 1.1.1.1
> +++ crt0.S 2000/08/30 19:55:44
> @@ -8,7 +8,7 @@
> mov.w #_stack,sp
> mov.w #_edata,r0
> mov.w #_end,r1
> - mov.w #0,r2
> + sub.w r2,r2
> .loop: mov.w r2,@r0
> adds #2,r0
> cmp r1,r0
> @@ -31,7 +31,7 @@
> mov.l #_stack,sp
> mov.l #_edata,er0
> mov.l #_end,er1
> - mov.w #0,r2 ; not sure about alignment requirements
> + sub.w r2,r2 ; not sure about alignment requirements
> .loop: mov.w r2,@er0 ; playing it safe for now
> adds #2,er0
> cmp.l er1,er0
> @@ -54,7 +54,7 @@
> mov.l #_stack,sp
> mov.l #_edata,er0
> mov.l #_end,er1
> - mov.w #0,r2 ; not sure about alignment requirements
> + sub.w r2,r2 ; not sure about alignment requirements
> .loop: mov.w r2,@er0 ; playing it safe for now
> adds #2,er0
> cmp.l er1,er0
> ============================================================