From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] [PATCH] Fixed cfi flash read uchar bug.
Date: Fri, 22 Dec 2006 22:33:58 +0100 [thread overview]
Message-ID: <20061222213358.83BB6352664@atlas.denx.de> (raw)
In-Reply-To: Your message of "Fri, 22 Dec 2006 11:42:38 CST." <1166809358.26147.32.camel@kaboom.lisle.iphase.com>
Hello,
in message <1166809358.26147.32.camel@kaboom.lisle.iphase.com> you wrote:
>
> > Did you compare the generated code?
>
> Nope, but that's a good idea. I'll compile and objdump the various
> scenarios next year.
I just did this - this is always pretty instructive in such situ-
ations. GCC-4.x optimizes much better, but will also unremorsefully
punish even small sins like a forgotten "volatile".
text data bss dec hex filename
202340 12104 32056 246500 3c2e4 /tmp/ELDK-3.1.1/u-boot
185751 12016 32048 229815 381b7 /tmp/ELDK-4.0/u-boot
------
That's nearly 10% difference in code size...
But here the difference is not in this function - both compile to
exactly the same code. Obviously some other functions in the CFI
driver are different, though.
> Merry Christmas from a very bad quoting net citizen. :P
Thanks, and Merry Christmas, too.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It is easier to change the specification to fit the program than vice
versa.
prev parent reply other threads:[~2006-12-22 21:33 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-22 7:27 [U-Boot-Users] [PATCH] Fixed cfi flash read uchar bug wei.zhang at freescale.com
2006-12-22 10:00 ` Wolfgang Denk
2006-12-22 11:02 ` Zhang Wei
2006-12-22 14:11 ` Wolfgang Denk
2006-12-22 16:34 ` [U-Boot-Users] 答复: " Zhang Wei-r63237
2006-12-22 17:17 ` Wolfgang Denk
2006-12-25 7:03 ` Zhang Wei
2006-12-25 23:24 ` Wolfgang Denk
2006-12-26 6:04 ` Zhang Wei
2007-01-04 2:07 ` Zhang Wei-r63237
2007-01-04 8:17 ` Wolfgang Denk
2007-01-04 8:36 ` Zhang Wei-r63237
2007-01-04 9:23 ` Wolfgang Denk
2007-01-04 11:19 ` Stefan Roese
2007-01-05 13:27 ` Stefan Roese
2007-01-07 10:12 ` Tolunay Orkun
2007-01-07 10:40 ` Wolfgang Denk
2007-01-13 7:11 ` Tolunay Orkun
2007-01-13 17:53 ` Håvard Skinnemoen
2007-01-16 6:52 ` Stefan Roese
2007-01-25 4:38 ` Zhang Wei-r63237
2007-01-25 16:10 ` Timur Tabi
2007-01-25 20:33 ` Wolfgang Denk
2007-01-26 2:13 ` Zhang Wei-r63237
2007-01-29 11:29 ` Tolunay Orkun
2007-01-30 3:36 ` Wang Haiying-r54964
2007-01-31 9:01 ` Tolunay Orkun
2007-01-31 19:25 ` Haiying Wang
2007-02-01 5:26 ` Tolunay Orkun
2007-02-01 22:06 ` Haiying Wang
2007-02-01 22:52 ` Chris Fester
2007-02-09 17:47 ` [U-Boot-Users] [PATCH0/2] Re-do the patch for adding DO_SYNC in flash_write_cmd Haiying Wang
2007-02-09 19:42 ` Wolfgang Denk
2007-02-09 19:48 ` Haiying Wang
2007-02-10 1:04 ` Wolfgang Denk
2007-02-10 7:23 ` Tolunay Orkun
2007-02-10 7:40 ` Stefan Roese
2007-02-10 7:57 ` Tolunay Orkun
2007-02-10 8:07 ` Stefan Roese
2007-02-10 21:55 ` Wolfgang Denk
2007-02-10 21:54 ` Wolfgang Denk
2007-02-11 2:34 ` Timur Tabi
2007-02-11 10:23 ` Wolfgang Denk
2007-02-09 19:59 ` Haavard Skinnemoen
2007-02-10 1:02 ` Wolfgang Denk
2007-02-09 17:47 ` [U-Boot-Users] [PATCH 1/2] Add DO_SYNC at the end of flash_write_cmd Haiying Wang
2007-02-09 19:45 ` Wolfgang Denk
2007-02-09 17:47 ` [U-Boot-Users] [PATCH 2/2] Define DO_SYNC in each CPU's header file Haiying Wang
2007-02-09 19:46 ` Wolfgang Denk
2007-02-10 7:17 ` Tolunay Orkun
2007-01-08 2:41 ` [U-Boot-Users] [PATCH] Fixed cfi flash read uchar bug Zhang Wei-r63237
2006-12-22 17:07 ` Chris Fester
2006-12-22 17:24 ` Wolfgang Denk
2006-12-22 17:42 ` Chris Fester
2006-12-22 21:33 ` Wolfgang Denk [this message]
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