search for: is_bigendian

...t;(<type> data, <type>* ptr, > > i32 alignment, i1 host, i1 littleEndian, i1 atomic, i1 volatile, > > i1 nontemporal, i1 singlethread) FWIW here is another way to do it (which is approximately what ClamAV does currently) by introducing just one intrinsic: declare i1 @llvm.is_bigendian() The advantage is that you can implement htonl() and ntohl() like functionality without using a temporary memory location. Actually I think having the 2 intrinsics you suggest and the is_bigendian() intrinsic would be optimal: you can use your 2 intrinsics for initial codegen, and mem2reg can tra...

One of the projects I am working on with others is to make LLVM-IR endian agnostic. So, I am sending out this proposal for feedback to the LLVM community. I've attached pretty version of the proposal in PDF format and pasted a 80-column safe text version below. I'm looking forward to comments and feedback. Thanks, Micah Villmow Text of Proposal:

...O_REMAP #include <Rversion.h> #include <R.h> #include <Rdefines.h> #include <Rinternals.h> #include <Rinterface.h> #include <Rembedded.h> #include <R_ext/Boolean.h> #include <R_ext/Parse.h> #include <R_ext/Rdynload.h> const int i___ = 1; #define is_bigendian() ( (*(char*)&i___) == 0 ) extern void (*ptr_R_ShowMessage)(const char *); extern void (*ptr_R_WriteConsole)(const char *, int); extern int (*ptr_R_ReadConsole)(char *, unsigned char *, int, int); extern void (*ptr_R_WriteConsoleEx)(const char *, int , int ); SEXP rh_status(SEXP); static uint...

Hi Edwin, > FWIW here is another way to do it (which is approximately what ClamAV does currently) by introducing just one intrinsic: > declare i1 @llvm.is_bigendian() why is an intrinsic needed? It is easy to write a small LLVM IR function that computes this. For example: define i1 @is_big_endian() { %ip = alloca i16 store i16 1, i16* %ip %cp = bitcast i16* %ip to i8* %c = load i8* %cp %r = icmp eq i8 %c, 0 ret i1 %r } Ciao, Duncan.