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mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-13 10:32:06 +00:00

Define the subtarget feature for the architecture version,

as derived from the target triple.  This is important for enabling
features that are implied based on the architecture version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118643 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-11-09 22:50:47 +00:00
parent 54f9256380
commit 66f6c79450

@ -64,13 +64,13 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
// Determine default and user specified characteristics
// Parse features string.
CPUString = ParseSubtargetFeatures(FS, CPUString);
// When no arch is specified either by CPU or by attributes, make the default
// ARMv4T.
if (CPUString == "generic" && (FS.empty() || FS == "generic"))
const char *ARMArchFeature = "";
if (CPUString == "generic" && (FS.empty() || FS == "generic")) {
ARMArchVersion = V4T;
ARMArchFeature = ",+v4t";
}
// Set the boolean corresponding to the current target triple, or the default
// if one cannot be determined, to true.
@ -88,30 +88,36 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
unsigned SubVer = TT[Idx];
if (SubVer >= '7' && SubVer <= '9') {
ARMArchVersion = V7A;
if (Len >= Idx+2 && TT[Idx+1] == 'm')
ARMArchFeature = ",+v7a";
if (Len >= Idx+2 && TT[Idx+1] == 'm') {
ARMArchVersion = V7M;
ARMArchFeature = ",+v7m";
}
} else if (SubVer == '6') {
ARMArchVersion = V6;
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
ARMArchFeature = ",+v6";
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2') {
ARMArchVersion = V6T2;
ARMArchFeature = ",+v6t2";
}
} else if (SubVer == '5') {
ARMArchVersion = V5T;
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
ARMArchFeature = ",+v5t";
if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e') {
ARMArchVersion = V5TE;
ARMArchFeature = ",+v5te";
}
} else if (SubVer == '4') {
if (Len >= Idx+2 && TT[Idx+1] == 't')
if (Len >= Idx+2 && TT[Idx+1] == 't') {
ARMArchVersion = V4T;
else
ARMArchFeature = ",+v4t";
} else {
ARMArchVersion = V4;
ARMArchFeature = "";
}
}
}
// Thumb2 implies at least V6T2.
if (ARMArchVersion >= V6T2)
ThumbMode = Thumb2;
else if (ThumbMode >= Thumb2)
ARMArchVersion = V6T2;
if (Len >= 10) {
if (TT.find("-darwin") != std::string::npos)
// arm-darwin
@ -121,6 +127,25 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
if (TT.find("eabi") != std::string::npos)
TargetABI = ARM_ABI_AAPCS;
// Parse features string. If the first entry in FS (the CPU) is missing,
// insert the architecture feature derived from the target triple. This is
// important for setting features that are implied based on the architecture
// version.
std::string FSWithArch;
if (FS.empty())
FSWithArch = std::string(ARMArchFeature);
else if (FS.find(',') == 0)
FSWithArch = std::string(ARMArchFeature) + FS;
else
FSWithArch = FS;
CPUString = ParseSubtargetFeatures(FSWithArch, CPUString);
// Thumb2 implies at least V6T2.
if (ARMArchVersion >= V6T2)
ThumbMode = Thumb2;
else if (ThumbMode >= Thumb2)
ARMArchVersion = V6T2;
if (isAAPCS_ABI())
stackAlignment = 8;