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Date: | Thu, 25 Oct 2007 11:23:57 -0400 |
Message-Id: | <200710251523.l9PFNv2X022561@envy.delorie.com> |
From: | DJ Delorie <dj AT delorie DOT com> |
To: | djgpp AT delorie DOT com |
In-reply-to: | <ffpkhp$p9o$1@aioe.org> (do_not_have@nohavenot.cmm) |
Subject: | Re: Using inline asm |
References: | <471FEAC8 DOT 5179 DOT 2FAB88DB AT gerritvn DOT gpvno DOT co DOT za> <200710250120 DOT l9P1KEb2032374 AT envy DOT delorie DOT com> <ffp07f$66t$1 AT aioe DOT org> <200710250306 DOT l9P36dqi002391 AT envy DOT delorie DOT com> <ffpkhp$p9o$1 AT aioe DOT org> |
Errors-To: | nobody AT delorie DOT com |
X-Mailing-List: | djgpp AT delorie DOT com |
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> Thanks. Okay, it doesn't, so correct the code... I wasn't sure if > the asm directive inserted a pusha; popa combination into the > stackframe, say instead of push ebp; pop ebp, or used some other > method. That might mess up returns... The intention of the asm is to tell gcc exactly what the opcode does, including side effects. It's up to gcc to decide if/when it needs to preserve registers or whatnot. That's why it's important to be specific about what the opcode does.
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