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* Fix pow wrapper to actually work 

* Implement rudimentary printf support for lli

llvm-svn: 1037
This commit is contained in:
Chris Lattner 2001-10-29 20:27:45 +00:00
parent 05fbeedde8
commit 490d2a8461
1 changed files with 56 additions and 1 deletions
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57
llvm/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
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@ -217,9 +217,64 @@ GenericValue lle_VP_free(MethodType *M, const vector<GenericValue> &Args) {
// double pow(double, double)
GenericValue lle_DDD_pow(MethodType *M, const vector<GenericValue> &Args) {
GenericValue GV;
GV.DoubleVal = pow(GV.DoubleVal, GV.DoubleVal);
GV.DoubleVal = pow(Args[0].DoubleVal, Args[1].DoubleVal);
return GV;
}
// int printf(sbyte *, ...) - a very rough implementation to make output useful.
GenericValue lle_iP_printf(MethodType *M, const vector<GenericValue> &Args) {
const char *FmtStr = (const char *)Args[0].PointerVal;
unsigned ArgNo = 1;
// printf should return # chars printed. This is completely incorrect, but
// close enough for now.
GenericValue GV; GV.IntVal = strlen(FmtStr);
while (1) {
switch (*FmtStr) {
case 0: return GV; // Null terminator...
default: // Normal nonspecial character
cout << *FmtStr++;
break;
case '\\': { // Handle escape codes
char Buffer[3];
Buffer[0] = *FmtStr++;
Buffer[1] = *FmtStr++;
Buffer[2] = 0;
cout << Buffer;
break;
}
case '%': { // Handle format specifiers
bool isLong = false;
++FmtStr;
if (*FmtStr == 'l') {
isLong = true;
FmtStr++;
}
switch (*FmtStr) {
case '%': cout << *FmtStr; break; // %%
case 'd': // %d %i
case 'i': cout << Args[ArgNo++].IntVal; break;
case 'u': cout << Args[ArgNo++].UIntVal; break; // %u
case 'o': cout << oct << Args[ArgNo++].UIntVal << dec; break; // %o
case 'x':
case 'X': cout << hex << Args[ArgNo++].UIntVal << dec; break; // %x %X
case 'e': case 'E': case 'g': case 'G': // %[eEgG]
cout /*<< std::scientific*/ << Args[ArgNo++].DoubleVal
/*<< std::fixed*/; break;
case 'f': cout << Args[ArgNo++].DoubleVal; break; // %f
case 'c': cout << Args[ArgNo++].UByteVal; break; // %c
case 's': cout << (char*)Args[ArgNo++].PointerVal; break; // %s
default: cout << "<unknown printf code '" << *FmtStr << "'!>";
ArgNo++; break;
}
++FmtStr;
break;
}
}
}
}
} // End extern "C"