// a declaration and definition of each function specified by the ARM NEON
// compiler interface. See ARM document DUI0348B.
//
+// Each NEON instruction is implemented in terms of 1 or more functions which
+// are suffixed with the element type of the input vectors. Functions may be
+// implemented in terms of generic vector operations such as +, *, -, etc. or
+// by calling a __builtin_-prefixed function which will be handled by clang's
+// CodeGen library.
+//
+// Additional validation code can be generated by this file when runHeader() is
+// called, rather than the normal run() entry point.
+//
//===----------------------------------------------------------------------===//
#include "NeonEmitter.h"
-#include "Record.h"
-#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
#include <string>
using namespace llvm;
-enum OpKind {
- OpNone,
- OpAdd,
- OpSub,
- OpMul,
- OpMla,
- OpMls,
- OpEq,
- OpGe,
- OpLe,
- OpGt,
- OpLt,
- OpNeg,
- OpNot,
- OpAnd,
- OpOr,
- OpXor,
- OpAndNot,
- OpOrNot,
- OpCast
-};
-
-enum ClassKind {
- ClassNone,
- ClassI,
- ClassS,
- ClassW,
- ClassB
-};
-
+/// ParseTypes - break down a string such as "fQf" into a vector of StringRefs,
+/// which each StringRef representing a single type declared in the string.
+/// for "fQf" we would end up with 2 StringRefs, "f", and "Qf", representing
+/// 2xfloat and 4xfloat respectively.
static void ParseTypes(Record *r, std::string &s,
SmallVectorImpl<StringRef> &TV) {
const char *data = s.data();
}
}
+/// Widen - Convert a type code into the next wider type. char -> short,
+/// short -> int, etc.
static char Widen(const char t) {
switch (t) {
case 'c':
return '\0';
}
+/// Narrow - Convert a type code into the next smaller type. short -> char,
+/// float -> half float, etc.
static char Narrow(const char t) {
switch (t) {
case 's':
return 's';
case 'l':
return 'i';
+ case 'f':
+ return 'h';
default: throw "unhandled type in widen!";
}
return '\0';
}
+/// For a particular StringRef, return the base type code, and whether it has
+/// the quad-vector, polynomial, or unsigned modifiers set.
static char ClassifyType(StringRef ty, bool &quad, bool &poly, bool &usgn) {
unsigned off = 0;
return ty[off];
}
-static std::string TypeString(const char mod, StringRef typestr) {
- bool quad = false;
- bool poly = false;
- bool usgn = false;
- bool scal = false;
- bool cnst = false;
- bool pntr = false;
-
- // base type to get the type string for.
- char type = ClassifyType(typestr, quad, poly, usgn);
-
- // Based on the modifying character, change the type and width if necessary.
+/// ModType - Transform a type code and its modifiers based on a mod code. The
+/// mod code definitions may be found at the top of arm_neon.td.
+static char ModType(const char mod, char type, bool &quad, bool &poly,
+ bool &usgn, bool &scal, bool &cnst, bool &pntr) {
switch (mod) {
- case 'v':
- return "void";
- case 'i':
- return "int";
case 't':
if (poly) {
poly = false;
usgn = true;
}
break;
- case 'x':
+ case 'u':
usgn = true;
+ case 'x':
poly = false;
if (type == 'f')
type = 'i';
break;
case 'f':
+ if (type == 'h')
+ quad = true;
type = 'f';
usgn = false;
break;
usgn = true;
break;
case 's':
+ case 'a':
scal = true;
break;
case 'k':
case 'c':
cnst = true;
case 'p':
+ usgn = false;
+ poly = false;
pntr = true;
scal = true;
break;
case 'h':
type = Narrow(type);
+ if (type == 'h')
+ quad = false;
break;
case 'e':
type = Narrow(type);
default:
break;
}
+ return type;
+}
+
+/// TypeString - for a modifier and type, generate the name of the typedef for
+/// that type. If generic is true, emit the generic vector type rather than
+/// the public NEON type. QUc -> uint8x8t_t / __neon_uint8x8_t.
+static std::string TypeString(const char mod, StringRef typestr,
+ bool generic = false) {
+ bool quad = false;
+ bool poly = false;
+ bool usgn = false;
+ bool scal = false;
+ bool cnst = false;
+ bool pntr = false;
+
+ if (mod == 'v')
+ return "void";
+ if (mod == 'i')
+ return "int";
+
+ // base type to get the type string for.
+ char type = ClassifyType(typestr, quad, poly, usgn);
+
+ // Based on the modifying character, change the type and width if necessary.
+ type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
SmallString<128> s;
+ if (generic)
+ s += "__neon_";
+
if (usgn)
s.push_back('u');
return s.str();
}
-// Turn "vst2_lane" into "vst2q_lane_f32", etc.
+/// TypeString - for a modifier and type, generate the clang BuiltinsARM.def
+/// prototype code for the function. See the top of clang's Builtins.def for
+/// a description of the type strings.
+static std::string BuiltinTypeString(const char mod, StringRef typestr,
+ ClassKind ck, bool ret) {
+ bool quad = false;
+ bool poly = false;
+ bool usgn = false;
+ bool scal = false;
+ bool cnst = false;
+ bool pntr = false;
+
+ if (mod == 'v')
+ return "v";
+ if (mod == 'i')
+ return "i";
+
+ // base type to get the type string for.
+ char type = ClassifyType(typestr, quad, poly, usgn);
+
+ // Based on the modifying character, change the type and width if necessary.
+ type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
+
+ if (pntr)
+ type = 'v';
+
+ if (type == 'h') {
+ type = 's';
+ usgn = true;
+ }
+ usgn = usgn | poly | ((ck == ClassI || ck == ClassW) && scal && type != 'f');
+
+ if (scal) {
+ SmallString<128> s;
+
+ if (usgn)
+ s.push_back('U');
+
+ if (type == 'l')
+ s += "LLi";
+ else
+ s.push_back(type);
+
+ if (cnst)
+ s.push_back('C');
+ if (pntr)
+ s.push_back('*');
+ return s.str();
+ }
+
+ // Since the return value must be one type, return a vector type of the
+ // appropriate width which we will bitcast.
+ if (ret) {
+ if (mod == '2')
+ return quad ? "V32c" : "V16c";
+ if (mod == '3')
+ return quad ? "V48c" : "V24c";
+ if (mod == '4')
+ return quad ? "V64c" : "V32c";
+ if (mod == 'f' || (ck != ClassB && type == 'f'))
+ return quad ? "V4f" : "V2f";
+ if (ck != ClassB && type == 's')
+ return quad ? "V8s" : "V4s";
+ if (ck != ClassB && type == 'i')
+ return quad ? "V4i" : "V2i";
+ if (ck != ClassB && type == 'l')
+ return quad ? "V2LLi" : "V1LLi";
+
+ return quad ? "V16c" : "V8c";
+ }
+
+ // Non-return array types are passed as individual vectors.
+ if (mod == '2')
+ return quad ? "V16cV16c" : "V8cV8c";
+ if (mod == '3')
+ return quad ? "V16cV16cV16c" : "V8cV8cV8c";
+ if (mod == '4')
+ return quad ? "V16cV16cV16cV16c" : "V8cV8cV8cV8c";
+
+ if (mod == 'f' || (ck != ClassB && type == 'f'))
+ return quad ? "V4f" : "V2f";
+ if (ck != ClassB && type == 's')
+ return quad ? "V8s" : "V4s";
+ if (ck != ClassB && type == 'i')
+ return quad ? "V4i" : "V2i";
+ if (ck != ClassB && type == 'l')
+ return quad ? "V2LLi" : "V1LLi";
+
+ return quad ? "V16c" : "V8c";
+}
+
+/// MangleName - Append a type or width suffix to a base neon function name,
+/// and insert a 'q' in the appropriate location if the operation works on
+/// 128b rather than 64b. E.g. turn "vst2_lane" into "vst2q_lane_f32", etc.
static std::string MangleName(const std::string &name, StringRef typestr,
ClassKind ck) {
+ if (name == "vcvt_f32_f16")
+ return name;
+
bool quad = false;
bool poly = false;
bool usgn = false;
break;
}
if (ck == ClassB)
- return s += "_v";
+ s += "_v";
// Insert a 'q' before the first '_' character so that it ends up before
// _lane or _n on vector-scalar operations.
// Generate the string "(argtype a, argtype b, ...)"
static std::string GenArgs(const std::string &proto, StringRef typestr) {
+ bool define = proto.find('i') != std::string::npos;
char arg = 'a';
std::string s;
s += "(";
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
- s += TypeString(proto[i], typestr);
- s.push_back(' ');
+ if (!define) {
+ s += TypeString(proto[i], typestr);
+ s.push_back(' ');
+ }
s.push_back(arg);
if ((i + 1) < e)
s += ", ";
return s;
}
+static std::string Duplicate(unsigned nElts, StringRef typestr,
+ const std::string &a) {
+ std::string s;
+
+ s = "(__neon_" + TypeString('d', typestr) + "){ ";
+ for (unsigned i = 0; i != nElts; ++i) {
+ s += a;
+ if ((i + 1) < nElts)
+ s += ", ";
+ }
+ s += " }";
+
+ return s;
+}
+
// Generate the definition for this intrinsic, e.g. "a + b" for OpAdd.
// If structTypes is true, the NEON types are structs of vector types rather
// than vector types, and the call becomes "a.val + b.val"
static std::string GenOpString(OpKind op, const std::string &proto,
StringRef typestr, bool structTypes = true) {
- std::string s("return ");
+ bool dummy, quad = false;
+ char type = ClassifyType(typestr, quad, dummy, dummy);
+ unsigned nElts = 0;
+ switch (type) {
+ case 'c': nElts = 8; break;
+ case 's': nElts = 4; break;
+ case 'i': nElts = 2; break;
+ case 'l': nElts = 1; break;
+ case 'h': nElts = 4; break;
+ case 'f': nElts = 2; break;
+ }
+
std::string ts = TypeString(proto[0], typestr);
+ std::string s = ts + " r; r";
+
if (structTypes)
- s += "(" + ts + "){";
+ s += ".val";
+ s += " = ";
+
std::string a, b, c;
if (proto.size() > 1)
- a = (structTypes && proto[1] != 'l') ? "a.val" : "a";
+ a = (structTypes && proto[1] != 'l' && proto[1] != 's') ? "a.val" : "a";
b = structTypes ? "b.val" : "b";
c = structTypes ? "c.val" : "c";
case OpSub:
s += a + " - " + b;
break;
+ case OpMulN:
+ b = Duplicate(nElts << (int)quad, typestr, "b");
case OpMul:
s += a + " * " + b;
break;
+ case OpMlaN:
+ c = Duplicate(nElts << (int)quad, typestr, "c");
case OpMla:
s += a + " + ( " + b + " * " + c + " )";
break;
+ case OpMlsN:
+ c = Duplicate(nElts << (int)quad, typestr, "c");
case OpMls:
s += a + " - ( " + b + " * " + c + " )";
break;
case OpCast:
s += "(__neon_" + ts + ")" + a;
break;
+ case OpConcat:
+ s += "__builtin_shufflevector((__neon_int64x1_t)" + a;
+ s += ", (__neon_int64x1_t)" + b + ", 0, 1)";
+ break;
+ case OpHi:
+ s += "(__neon_int64x1_t)(((__neon_int64x2_t)" + a + ")[1])";
+ break;
+ case OpLo:
+ s += "(__neon_int64x1_t)(((__neon_int64x2_t)" + a + ")[0])";
+ break;
+ case OpDup:
+ s += Duplicate(nElts << (int)quad, typestr, a);
+ break;
+ case OpSelect:
+ // ((0 & 1) | (~0 & 2))
+ ts = TypeString(proto[1], typestr);
+ s += "( " + a + " & (__neon_" + ts + ")" + b + ") | ";
+ s += "(~" + a + " & (__neon_" + ts + ")" + c + ")";
+ break;
+ case OpRev16:
+ s += "__builtin_shufflevector(" + a + ", " + a;
+ for (unsigned i = 2; i <= nElts << (int)quad; i += 2)
+ for (unsigned j = 0; j != 2; ++j)
+ s += ", " + utostr(i - j - 1);
+ s += ")";
+ break;
+ case OpRev32:
+ nElts >>= 1;
+ s += "__builtin_shufflevector(" + a + ", " + a;
+ for (unsigned i = nElts; i <= nElts << (1 + (int)quad); i += nElts)
+ for (unsigned j = 0; j != nElts; ++j)
+ s += ", " + utostr(i - j - 1);
+ s += ")";
+ break;
+ case OpRev64:
+ s += "__builtin_shufflevector(" + a + ", " + a;
+ for (unsigned i = nElts; i <= nElts << (int)quad; i += nElts)
+ for (unsigned j = 0; j != nElts; ++j)
+ s += ", " + utostr(i - j - 1);
+ s += ")";
+ break;
default:
throw "unknown OpKind!";
break;
}
-
- if (structTypes)
- s += "}";
- s += ";";
+ s += "; return r;";
return s;
}
+static unsigned GetNeonEnum(const std::string &proto, StringRef typestr) {
+ unsigned mod = proto[0];
+ unsigned ret = 0;
+
+ if (mod == 'v' || mod == 'f')
+ mod = proto[1];
+
+ bool quad = false;
+ bool poly = false;
+ bool usgn = false;
+ bool scal = false;
+ bool cnst = false;
+ bool pntr = false;
+
+ // base type to get the type string for.
+ char type = ClassifyType(typestr, quad, poly, usgn);
+
+ // Based on the modifying character, change the type and width if necessary.
+ type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
+
+ if (usgn)
+ ret |= 0x08;
+ if (quad)
+ ret |= 0x10;
+
+ switch (type) {
+ case 'c':
+ ret |= poly ? 5 : 0;
+ break;
+ case 's':
+ ret |= poly ? 6 : 1;
+ break;
+ case 'i':
+ ret |= 2;
+ break;
+ case 'l':
+ ret |= 3;
+ break;
+ case 'h':
+ ret |= 7;
+ break;
+ case 'f':
+ ret |= 4;
+ break;
+ default:
+ throw "unhandled type!";
+ break;
+ }
+ return ret;
+}
+
// Generate the definition for this intrinsic, e.g. __builtin_neon_cls(a)
// If structTypes is true, the NEON types are structs of vector types rather
// than vector types, and the call becomes __builtin_neon_cls(a.val)
static std::string GenBuiltin(const std::string &name, const std::string &proto,
StringRef typestr, ClassKind ck,
bool structTypes = true) {
+ bool dummy, quad = false;
+ char type = ClassifyType(typestr, quad, dummy, dummy);
+ unsigned nElts = 0;
+ switch (type) {
+ case 'c': nElts = 8; break;
+ case 's': nElts = 4; break;
+ case 'i': nElts = 2; break;
+ case 'l': nElts = 1; break;
+ case 'h': nElts = 4; break;
+ case 'f': nElts = 2; break;
+ }
+ if (quad) nElts <<= 1;
+
char arg = 'a';
std::string s;
-
+
+ bool unioning = (proto[0] == '2' || proto[0] == '3' || proto[0] == '4');
+ bool define = proto.find('i') != std::string::npos;
+
+ // If all types are the same size, bitcasting the args will take care
+ // of arg checking. The actual signedness etc. will be taken care of with
+ // special enums.
+ if (proto.find('s') == std::string::npos)
+ ck = ClassB;
+
if (proto[0] != 'v') {
- // FIXME: if return type is 2/3/4, emit unioning code.
- s += "return ";
- if (structTypes) {
- s += "(";
- s += TypeString(proto[0], typestr);
- s += "){";
+ std::string ts = TypeString(proto[0], typestr);
+
+ if (define) {
+ if (proto[0] != 's')
+ s += "(" + ts + "){(__neon_" + ts + ")";
+ } else {
+ if (unioning) {
+ s += "union { ";
+ s += TypeString(proto[0], typestr, true) + " val; ";
+ s += TypeString(proto[0], typestr, false) + " s; ";
+ s += "} r;";
+ } else {
+ s += ts;
+ }
+
+ s += " r; r";
+ if (structTypes && proto[0] != 's' && proto[0] != 'i' && proto[0] != 'l')
+ s += ".val";
+
+ s += " = ";
}
- }
+ }
+
+ bool splat = proto.find('a') != std::string::npos;
s += "__builtin_neon_";
- s += MangleName(name, typestr, ck);
+ if (splat) {
+ std::string vname(name, 0, name.size()-2);
+ s += MangleName(vname, typestr, ck);
+ } else {
+ s += MangleName(name, typestr, ck);
+ }
s += "(";
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
- s.push_back(arg);
+ std::string args = std::string(&arg, 1);
+ if (define)
+ args = "(" + args + ")";
+
+ // Handle multiple-vector values specially, emitting each subvector as an
+ // argument to the __builtin.
+ if (structTypes && (proto[i] == '2' || proto[i] == '3' || proto[i] == '4')){
+ for (unsigned vi = 0, ve = proto[i] - '0'; vi != ve; ++vi) {
+ s += args + ".val[" + utostr(vi) + "]";
+ if ((vi + 1) < ve)
+ s += ", ";
+ }
+ if ((i + 1) < e)
+ s += ", ";
+
+ continue;
+ }
+
+ if (splat && (i + 1) == e)
+ s += Duplicate(nElts, typestr, args);
+ else
+ s += args;
+
if (structTypes && proto[i] != 's' && proto[i] != 'i' && proto[i] != 'l' &&
- proto[i] != 'p' && proto[i] != 'c') {
+ proto[i] != 'p' && proto[i] != 'c' && proto[i] != 'a') {
s += ".val";
}
if ((i + 1) < e)
s += ", ";
}
- s += ")";
- if (proto[0] != 'v' && structTypes)
- s += "}";
- s += ";";
+ // Extra constant integer to hold type class enum for this function, e.g. s8
+ if (ck == ClassB)
+ s += ", " + utostr(GetNeonEnum(proto, typestr));
+
+ if (define)
+ s += ")";
+ else
+ s += ");";
+
+ if (proto[0] != 'v') {
+ if (define) {
+ if (proto[0] != 's')
+ s += "}";
+ } else {
+ if (unioning)
+ s += " return r.s;";
+ else
+ s += " return r;";
+ }
+ }
return s;
}
+static std::string GenBuiltinDef(const std::string &name,
+ const std::string &proto,
+ StringRef typestr, ClassKind ck) {
+ std::string s("BUILTIN(__builtin_neon_");
+
+ // If all types are the same size, bitcasting the args will take care
+ // of arg checking. The actual signedness etc. will be taken care of with
+ // special enums.
+ if (proto.find('s') == std::string::npos)
+ ck = ClassB;
+
+ s += MangleName(name, typestr, ck);
+ s += ", \"";
+
+ for (unsigned i = 0, e = proto.size(); i != e; ++i)
+ s += BuiltinTypeString(proto[i], typestr, ck, i == 0);
+
+ // Extra constant integer to hold type class enum for this function, e.g. s8
+ if (ck == ClassB)
+ s += "i";
+
+ s += "\", \"n\")";
+ return s;
+}
+
+/// run - Read the records in arm_neon.td and output arm_neon.h. arm_neon.h
+/// is comprised of type definitions and function declarations.
void NeonEmitter::run(raw_ostream &OS) {
EmitSourceFileHeader("ARM NEON Header", OS);
OS << "#include <stdint.h>\n\n";
// Emit NEON-specific scalar typedefs.
- // FIXME: probably need to do something better for polynomial types.
- // FIXME: is this the correct thing to do for float16?
OS << "typedef float float32_t;\n";
OS << "typedef uint8_t poly8_t;\n";
OS << "typedef uint16_t poly16_t;\n";
OS << "typedef uint16_t float16_t;\n";
-
+
// Emit Neon vector typedefs.
std::string TypedefTypes("cQcsQsiQilQlUcQUcUsQUsUiQUiUlQUlhQhfQfPcQPcPsQPs");
SmallVector<StringRef, 24> TDTypeVec;
ParseTypes(0, TypedefTypes, TDTypeVec);
// Emit vector typedefs.
- for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
- bool dummy, quad = false;
- (void) ClassifyType(TDTypeVec[i], quad, dummy, dummy);
- OS << "typedef __attribute__(( __vector_size__(";
- OS << (quad ? "16) )) " : "8) )) ");
- OS << TypeString('s', TDTypeVec[i]);
- OS << " __neon_";
- OS << TypeString('d', TDTypeVec[i]) << ";\n";
+ for (unsigned v = 1; v != 5; ++v) {
+ for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
+ bool dummy, quad = false;
+ (void) ClassifyType(TDTypeVec[i], quad, dummy, dummy);
+ OS << "typedef __attribute__(( __vector_size__(";
+
+ OS << utostr(8*v*(quad ? 2 : 1)) << ") )) ";
+ if (!quad)
+ OS << " ";
+
+ OS << TypeString('s', TDTypeVec[i]);
+ OS << " __neon_";
+
+ char t = (v == 1) ? 'd' : '0' + v;
+ OS << TypeString(t, TDTypeVec[i]) << ";\n";
+ }
}
OS << "\n";
std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
- StringMap<OpKind> OpMap;
- OpMap["OP_NONE"] = OpNone;
- OpMap["OP_ADD"] = OpAdd;
- OpMap["OP_SUB"] = OpSub;
- OpMap["OP_MUL"] = OpMul;
- OpMap["OP_MLA"] = OpMla;
- OpMap["OP_MLS"] = OpMls;
- OpMap["OP_EQ"] = OpEq;
- OpMap["OP_GE"] = OpGe;
- OpMap["OP_LE"] = OpLe;
- OpMap["OP_GT"] = OpGt;
- OpMap["OP_LT"] = OpLt;
- OpMap["OP_NEG"] = OpNeg;
- OpMap["OP_NOT"] = OpNot;
- OpMap["OP_AND"] = OpAnd;
- OpMap["OP_OR"] = OpOr;
- OpMap["OP_XOR"] = OpXor;
- OpMap["OP_ANDN"] = OpAndNot;
- OpMap["OP_ORN"] = OpOrNot;
- OpMap["OP_CAST"] = OpCast;
-
- DenseMap<Record*, ClassKind> ClassMap;
- Record *SI = Records.getClass("SInst");
- Record *II = Records.getClass("IInst");
- Record *WI = Records.getClass("WInst");
- Record *BI = Records.getClass("BInst");
- ClassMap[SI] = ClassS;
- ClassMap[II] = ClassI;
- ClassMap[WI] = ClassW;
- ClassMap[BI] = ClassB;
-
// Unique the return+pattern types, and assign them.
for (unsigned i = 0, e = RV.size(); i != e; ++i) {
Record *R = RV[i];
OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
+ bool define = Proto.find('i') != std::string::npos;
+
for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
assert(!Proto.empty() && "");
// static always inline + return type
- OS << "__ai " << TypeString(Proto[0], TypeVec[ti]);
+ if (define)
+ OS << "#define";
+ else
+ OS << "__ai " << TypeString(Proto[0], TypeVec[ti]);
// Function name with type suffix
OS << " " << MangleName(name, TypeVec[ti], ClassS);
OS << GenArgs(Proto, TypeVec[ti]);
// Definition.
- OS << " { ";
+ if (define)
+ OS << " ";
+ else
+ OS << " { ";
if (k != OpNone) {
OS << GenOpString(k, Proto, TypeVec[ti]);
throw TGError(R->getLoc(), "Builtin has no class kind");
OS << GenBuiltin(name, Proto, TypeVec[ti], ck);
}
-
- OS << " }\n";
+ if (!define)
+ OS << " }";
+ OS << "\n";
}
OS << "\n";
}
+ OS << "#undef __ai\n\n";
+ OS << "#endif /* __ARM_NEON_H */\n";
+}
- // TODO:
- // Unique the return+pattern types, and assign them to each record
- // Emit a #define for each unique "type" of intrinsic declaring all variants.
- // Emit a #define for each intrinsic mapping it to a particular type.
+static unsigned RangeFromType(StringRef typestr) {
+ // base type to get the type string for.
+ bool quad = false, dummy = false;
+ char type = ClassifyType(typestr, quad, dummy, dummy);
- OS << "#endif /* __ARM_NEON_H */\n";
+ switch (type) {
+ case 'c':
+ return (8 << (int)quad) - 1;
+ case 'h':
+ case 's':
+ return (4 << (int)quad) - 1;
+ case 'f':
+ case 'i':
+ return (2 << (int)quad) - 1;
+ case 'l':
+ return (1 << (int)quad) - 1;
+ default:
+ throw "unhandled type!";
+ break;
+ }
}
+/// runHeader - Emit a file with sections defining:
+/// 1. the NEON section of BuiltinsARM.def.
+/// 2. the SemaChecking code for the type overload checking.
+/// 3. the SemaChecking code for validation of intrinsic immedate arguments.
void NeonEmitter::runHeader(raw_ostream &OS) {
+ std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
+
+ StringMap<OpKind> EmittedMap;
+
+ // Generate BuiltinsARM.def for NEON
+ OS << "#ifdef GET_NEON_BUILTINS\n";
+ for (unsigned i = 0, e = RV.size(); i != e; ++i) {
+ Record *R = RV[i];
+ OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
+ if (k != OpNone)
+ continue;
+
+ std::string Proto = R->getValueAsString("Prototype");
+
+ // Functions with 'a' (the splat code) in the type prototype should not get
+ // their own builtin as they use the non-splat variant.
+ if (Proto.find('a') != std::string::npos)
+ continue;
+
+ std::string Types = R->getValueAsString("Types");
+ SmallVector<StringRef, 16> TypeVec;
+ ParseTypes(R, Types, TypeVec);
+
+ if (R->getSuperClasses().size() < 2)
+ throw TGError(R->getLoc(), "Builtin has no class kind");
+
+ std::string name = LowercaseString(R->getName());
+ ClassKind ck = ClassMap[R->getSuperClasses()[1]];
+
+ for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
+ // Generate the BuiltinsARM.def declaration for this builtin, ensuring
+ // that each unique BUILTIN() macro appears only once in the output
+ // stream.
+ std::string bd = GenBuiltinDef(name, Proto, TypeVec[ti], ck);
+ if (EmittedMap.count(bd))
+ continue;
+
+ EmittedMap[bd] = OpNone;
+ OS << bd << "\n";
+ }
+ }
+ OS << "#endif\n\n";
+
+ // Generate the overloaded type checking code for SemaChecking.cpp
+ OS << "#ifdef GET_NEON_OVERLOAD_CHECK\n";
+ for (unsigned i = 0, e = RV.size(); i != e; ++i) {
+ Record *R = RV[i];
+ OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
+ if (k != OpNone)
+ continue;
+
+ std::string Proto = R->getValueAsString("Prototype");
+ std::string Types = R->getValueAsString("Types");
+ std::string name = LowercaseString(R->getName());
+
+ // Functions with 'a' (the splat code) in the type prototype should not get
+ // their own builtin as they use the non-splat variant.
+ if (Proto.find('a') != std::string::npos)
+ continue;
+
+ // Functions which have a scalar argument cannot be overloaded, no need to
+ // check them if we are emitting the type checking code.
+ if (Proto.find('s') != std::string::npos)
+ continue;
+
+ SmallVector<StringRef, 16> TypeVec;
+ ParseTypes(R, Types, TypeVec);
+
+ if (R->getSuperClasses().size() < 2)
+ throw TGError(R->getLoc(), "Builtin has no class kind");
+
+ int si = -1, qi = -1;
+ unsigned mask = 0, qmask = 0;
+ for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
+ // Generate the switch case(s) for this builtin for the type validation.
+ bool quad = false, poly = false, usgn = false;
+ (void) ClassifyType(TypeVec[ti], quad, poly, usgn);
+
+ if (quad) {
+ qi = ti;
+ qmask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
+ } else {
+ si = ti;
+ mask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
+ }
+ }
+ if (mask)
+ OS << "case ARM::BI__builtin_neon_"
+ << MangleName(name, TypeVec[si], ClassB)
+ << ": mask = " << "0x" << utohexstr(mask) << "; break;\n";
+ if (qmask)
+ OS << "case ARM::BI__builtin_neon_"
+ << MangleName(name, TypeVec[qi], ClassB)
+ << ": mask = " << "0x" << utohexstr(qmask) << "; break;\n";
+ }
+ OS << "#endif\n\n";
+
+ // Generate the intrinsic range checking code for shift/lane immediates.
+ OS << "#ifdef GET_NEON_IMMEDIATE_CHECK\n";
+ for (unsigned i = 0, e = RV.size(); i != e; ++i) {
+ Record *R = RV[i];
+
+ OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
+ if (k != OpNone)
+ continue;
+
+ std::string name = LowercaseString(R->getName());
+ std::string Proto = R->getValueAsString("Prototype");
+ std::string Types = R->getValueAsString("Types");
+
+ // Functions with 'a' (the splat code) in the type prototype should not get
+ // their own builtin as they use the non-splat variant.
+ if (Proto.find('a') != std::string::npos)
+ continue;
+
+ // Functions which do not have an immediate do not need to have range
+ // checking code emitted.
+ if (Proto.find('i') == std::string::npos)
+ continue;
+
+ SmallVector<StringRef, 16> TypeVec;
+ ParseTypes(R, Types, TypeVec);
+
+ if (R->getSuperClasses().size() < 2)
+ throw TGError(R->getLoc(), "Builtin has no class kind");
+
+ ClassKind ck = ClassMap[R->getSuperClasses()[1]];
+
+ for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
+ std::string namestr, shiftstr, rangestr;
+
+ // Builtins which are overloaded by type will need to have their upper
+ // bound computed at Sema time based on the type constant.
+ if (Proto.find('s') == std::string::npos) {
+ ck = ClassB;
+ if (R->getValueAsBit("isShift")) {
+ shiftstr = ", true";
+
+ // Right shifts have an 'r' in the name, left shifts do not.
+ if (name.find('r') != std::string::npos)
+ rangestr = "l = 1; ";
+ }
+ rangestr += "u = RFT(TV" + shiftstr + ")";
+ } else {
+ rangestr = "u = " + utostr(RangeFromType(TypeVec[ti]));
+ }
+ // Make sure cases appear only once.
+ namestr = MangleName(name, TypeVec[ti], ck);
+ if (EmittedMap.count(namestr))
+ continue;
+ EmittedMap[namestr] = OpNone;
+
+ unsigned immidx = 0;
+ for (unsigned ii = 1, ie = Proto.size(); ii != ie; ++ii) {
+ switch (Proto[ii]) {
+ default: immidx += 1; break;
+ case '2': immidx += 2; break;
+ case '3': immidx += 3; break;
+ case '4': immidx += 4; break;
+ case 'i': ie = ii + 1; break;
+ }
+ }
+ OS << "case ARM::BI__builtin_neon_" << MangleName(name, TypeVec[ti], ck)
+ << ": i = " << immidx << "; " << rangestr << "; break;\n";
+ }
+ }
+ OS << "#endif\n\n";
}
projects / oota-llvm.git / blobdiff