AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  ASM and JNI          AppletTalk.com Forum Index -> JVM, native methods and hardware View previous topic :: View next topic   Author Message Roedy Green Guest Posted: Sat May 29, 2004 9:40 am    Post subject: ASM and JNI When you write your JNI in assembler for Windows, and you want to return a long, which register pair does it go in, and which is the high order? -- Canadian Mind Products, Roedy Green. Coaching, problem solving, economical contract programming. See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. Back to top Roedy Green Guest Posted: Sat May 29, 2004 10:00 am    Post subject: Re: ASM and JNI On Sat, 29 May 2004 09:40:00 GMT, Roedy Green <look-on (AT) mindprod (DOT) com.invalid> wrote or quoted : Quote: When you write your JNI in assembler for Windows, and you want to return a long, which register pair does it go in, and which is the high order? edx:eax where edx is the high order. I finally found the /FA switch in the projects settings that generates *.ASM files which lets you figure out the register conventions by looking an ASM code generated from C and C++. -- Canadian Mind Products, Roedy Green. Coaching, problem solving, economical contract programming. See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. Back to top glen herrmannsfeldt Guest Posted: Wed Jun 02, 2004 10:57 pm    Post subject: Re: ASM and JNI Roedy Green wrote: Quote: When you write your JNI in assembler for Windows, and you want to return a long, which register pair does it go in, and which is the high order? All x86 code that I know of use EDX:EAX with EDX high. At least one that I know of, the RDTSC instruction, returns it that way. My favorite JNI has the executable assembly code: rdtsc ret with a few more instruction to tell the assembler what to do with it, but that aren't executable. -- glen Back to top striker Guest Posted: Fri Jun 04, 2004 3:44 am    Post subject: Re: ASM and JNI Under win32 you dont need to register pair. EAX is sufficient. Back to top Roedy Green Guest Posted: Fri Jun 04, 2004 4:59 am    Post subject: Re: ASM and JNI On Thu, 03 Jun 2004 23:44:04 -0400, "striker" <james.ladd (AT) nospam (DOT) clubmarine.com.au> wrote or quoted : Quote: Under win32 you dont need to register pair. EAX is sufficient. for returning a jlong 64 bits you need two registers. edx:eax. See the source code at http://mindprod.com/products.html#PENTIUM -- Canadian Mind Products, Roedy Green. Coaching, problem solving, economical contract programming. See http://mindprod.com/jgloss/jgloss.html for The Java Glossary. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         AppletTalk.com Forum Index -> JVM, native methods and hardware All times are GMT Page 1 of 1   Jump to: Select a forum Java Newsgroups----------------Java DiscussionsWeb-based java games comp.lang.java 3D Graphics API's for Java Java: Support and criticism Java System Announcements comp.lang.java.api JavaBeans Java and CORBA Java and Databases comp.lang.java.developer Java GUI Toolkits Java Help comp.lang.java.javascript JVM, native methods and hardware comp.lang.java.misc Java Language Programming Security and Java comp.lang.java.setup Java Software Tools comp.lang.java.tech ibm.software.java.linux  Non-English Java Newsgroups----------------Java Language (German)Language Java (Français)Java (Italian)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.