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From: | cbramix AT libero DOT it (Carlo) |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Optimizing 8 bit variables? |
Date: | 26 Aug 2003 05:27:43 -0700 |
Organization: | http://groups.google.com/ |
Lines: | 19 |
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NNTP-Posting-Date: | 26 Aug 2003 12:27:45 GMT |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
Hello everyone! I have this little problem: GCC doesn't seem to optimize very well a piece of code I wrote with 8 bit variables. So, I was thinking to use a local register variable. On the documentation I read that GCC can do that: register int *foo asm ("ebx"); But what should I do if I need to use BH or BL registers? I tried to use BH or BL instead of ebx: register unsigned char myvar asm ("bl"); GCC doesn't give me error messages, but it generates the same code I got without the 'asm' keyword. Thanks in advance. Carlo.
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