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Original patch was overly complicated.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32723 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-12-20 21:33:34 +00:00
parent 62d75e7695
commit 40ee69f3ca
1 changed files with 11 additions and 34 deletions
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45
lib/Target/PowerPC/PPCAsmPrinter.cpp
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@ -89,38 +89,15 @@ namespace {
/// stripRegisterPrefix - This method strips the character prefix from a
/// register name so that only the number is left. Used by for linux asm.
void stripRegisterPrefix(std::string &Name) {
// Potential prefixes.
static const char *Prefixes[] = { "r", "f", "v", "cr" };
unsigned NPrefixes = sizeof(Prefixes) / sizeof(const char *);
// Fetch string length.
unsigned Size = Name.size();
// Start position of numeric portion.
unsigned Pos = 0;
// Try each prefix.
for (unsigned i = 0; i < NPrefixes; ++i) {
const char *Prefix = Prefixes[i];
unsigned Length = strlen(Prefix);
// Does it match the beginning?
if (Name.compare(0, Length, Prefix, Length) == 0) {
// If so, start looking beyond the prefix.
Pos = strlen(Prefix);
break;
}
}
// If we have a match.
if (Pos) {
// Remaining characters better be digits.
for (unsigned j = Pos; j < Size; ++j) {
unsigned Ch = Name[j];
if (Ch < '0' || '9' < Ch) return;
}
// Pass back just the numeric portion.
Name = Name.substr(Pos, Size - Pos);
const char *stripRegisterPrefix(const char *RegName) {
switch (RegName[0]) {
case 'r':
case 'f':
case 'v': return RegName + 1;
case 'c': if (RegName[0] == 'r') return RegName + 2;
}
return RegName;
}
/// printRegister - Print register according to target requirements.
@ -135,11 +112,11 @@ namespace {
return;
}
std::string Name = TM.getRegisterInfo()->get(RegNo).Name;
const char *RegName = TM.getRegisterInfo()->get(RegNo).Name;
// Linux assembler (Others?) does not take register mnemonics.
// FIXME - What about special registers used in mfspr/mtspr?
if (!Subtarget.isDarwin()) stripRegisterPrefix(Name);
O << Name;
if (!Subtarget.isDarwin()) RegName = stripRegisterPrefix(RegName);
O << RegName;
}
void printOperand(const MachineInstr *MI, unsigned OpNo) {