From: Borja F. <bor...@gm...> - 2013-06-27 18:04:52
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Ok, remember that there's an additional constraint to print memory registers as X, Y, Z instead of r26, etc... it's described in the avr libc manual. This one should be easier than the multi byte constraints. 2013/6/27 Stepan Dyatkovskiy <stp...@na...> > Good ) Currently I'm working on multi-byte constraints. Once it would be > done, hope we can compile avr-libc. > > -Stepan. > > Borja Ferrer wrote: > >> 1) I think this now resolved. >> 2) I will take a look, no idea about it now. >> >> >> 2013/6/27 Stepan Dyatkovskiy <stp...@na... <mailto:stp...@na... >> >> >> >> >> BTW, for X86 target and memory constraint I got the same as for ARM: >> >> call void asm "instr $0", "=*m,~{dirflag},~{fpsr},~{__**flags}"(i32* >> >> @a) #1, !srcloc !0 >> >> It just uses 'm' instead of 'Q'. Note it also contains '*' before 'm'. >> >> -Stepan. >> >> >> Stepan Dyatkovskiy wrote: >> >> Agh!! MY grammar: Subject: One more differencE in clang. Would >> you fix >> it in your reply please. >> Thanks. >> -Stepan. >> >> Stepan Dyatkovskiy wrote: >> >> Hi guys. >> >> Today I went through whole AVR-Libc Inline Assembler >> Cookbook chapter. >> I have checked all examples with two commands: >> 1. clang -S -o - -emit-llvm example.c >> 2. avr-clang -S -o - -emit-llvm example.c >> >> I've found two difference: >> >> 1. As I mentioned before difference for memory constraint. >> For string "asm("instr %0": "=Q"(a):)" >> >> clang emits: >> %0 = call i32 asm "instr $0", >> "=Q,~{dirflag},~{fpsr},~{__**flags}"() >> >> >> arm-linux-gnueabi emits: >> call void asm "instr $0", "=*Q"(i32* @a) #1, !srcloc !0 >> >> avr-clang: >> %0 = call i16 asm "instr $0", "=Q"() >> >> I'll try to use current syntax here. Though ARM syntax is >> working well >> now, but I din't find explanation of =*Q sequence yet. >> >> 2. asm names. >> >> // example.c: >> extern long Calc(void) asm ("CALCULATE"); >> void f() { Calc(); } >> >> clang emits: >> %call = call i64 @CALCULATE() >> ... >> declare i64 @CALCULATE() >> >> avr-clang emits: >> %call = call i32 @"\01CALCULATE"() >> ... >> declare i32 @"\01CALCULATE"() >> >> Does somebody know what \01 is used for here? >> >> -Stepan >> >> ------------------------------** >> __----------------------------**--__------------------ >> >> >> This SF.net email is sponsored by Windows: >> >> Build for Windows Store. >> >> http://p.sf.net/sfu/windows-__**dev2dev<http://p.sf.net/sfu/windows-__dev2dev> >> <http://p.sf.net/sfu/windows-**dev2dev<http://p.sf.net/sfu/windows-dev2dev> >> > >> ______________________________**___________________ >> avr-llvm-devel mailing list >> avr-llvm-devel@lists.__sourcef**orge.net<http://sourceforge.net> >> <mailto:avr-llvm-devel@lists.**sourceforge.net<avr...@li...> >> > >> https://lists.sourceforge.net/**__lists/listinfo/avr-llvm-** >> devel <https://lists.sourceforge.net/__lists/listinfo/avr-llvm-devel> < >> https://lists.sourceforge.**net/lists/listinfo/avr-llvm-**devel<https://lists.sourceforge.net/lists/listinfo/avr-llvm-devel> >> > >> >> >> >> >> > |