This is the mail archive of the crossgcc@sourceware.org mailing list for the crossgcc project.

See the CrossGCC FAQ for lots more information.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: ldrb vs ldrh in gcc-3.4.4 (ARM)

Steven:

Steven Scholz wrote:

Hi,

And I don't understand why he is using two ldrb instructions!
Both compilers were called with "-g -O0" Using -O3 creates smaller code but still uses ldrb.


Passing "-march=armv4" seems to help. Passing "-mcpu=arm920t" instead helps too.

I used Dan's crosstool to build the toolchain. How can I built a tool chain that makes "good code" (TM) for an arm920t _by default_?


Doesn't crosstool have an arm7tdmi example? I'd start there.

b.g.

--
Bill Gatliff
bgat@billgatliff.com


------
Want more information?  See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/
Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]