1 //===- NeonEmitter.cpp - Generate arm_neon.h for use with clang -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tablegen backend is responsible for emitting arm_neon.h, which includes
11 // a declaration and definition of each function specified by the ARM NEON
12 // compiler interface. See ARM document DUI0348B.
14 // Each NEON instruction is implemented in terms of 1 or more functions which
15 // are suffixed with the element type of the input vectors. Functions may be
16 // implemented in terms of generic vector operations such as +, *, -, etc. or
17 // by calling a __builtin_-prefixed function which will be handled by clang's
20 // Additional validation code can be generated by this file when runHeader() is
21 // called, rather than the normal run() entry point.
23 //===----------------------------------------------------------------------===//
25 #include "NeonEmitter.h"
26 #include "llvm/ADT/SmallString.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/StringExtras.h"
33 /// ParseTypes - break down a string such as "fQf" into a vector of StringRefs,
34 /// which each StringRef representing a single type declared in the string.
35 /// for "fQf" we would end up with 2 StringRefs, "f", and "Qf", representing
36 /// 2xfloat and 4xfloat respectively.
37 static void ParseTypes(Record *r, std::string &s,
38 SmallVectorImpl<StringRef> &TV) {
39 const char *data = s.data();
42 for (unsigned i = 0, e = s.size(); i != e; ++i, ++len) {
43 if (data[len] == 'P' || data[len] == 'Q' || data[len] == 'U')
55 throw TGError(r->getLoc(),
56 "Unexpected letter: " + std::string(data + len, 1));
59 TV.push_back(StringRef(data, len + 1));
65 /// Widen - Convert a type code into the next wider type. char -> short,
66 /// short -> int, etc.
67 static char Widen(const char t) {
75 default: throw "unhandled type in widen!";
80 /// Narrow - Convert a type code into the next smaller type. short -> char,
81 /// float -> half float, etc.
82 static char Narrow(const char t) {
92 default: throw "unhandled type in widen!";
97 /// For a particular StringRef, return the base type code, and whether it has
98 /// the quad-vector, polynomial, or unsigned modifiers set.
99 static char ClassifyType(StringRef ty, bool &quad, bool &poly, bool &usgn) {
103 if (ty[off] == 'Q') {
109 if (ty[off] == 'P') {
114 // remember unsigned.
115 if (ty[off] == 'U') {
120 // base type to get the type string for.
124 /// ModType - Transform a type code and its modifiers based on a mod code. The
125 /// mod code definitions may be found at the top of arm_neon.td.
126 static char ModType(const char mod, char type, bool &quad, bool &poly,
127 bool &usgn, bool &scal, bool &cnst, bool &pntr) {
191 /// TypeString - for a modifier and type, generate the name of the typedef for
192 /// that type. If generic is true, emit the generic vector type rather than
193 /// the public NEON type. QUc -> uint8x8_t / __neon_uint8x8_t.
194 static std::string TypeString(const char mod, StringRef typestr,
195 bool generic = false) {
208 // base type to get the type string for.
209 char type = ClassifyType(typestr, quad, poly, usgn);
211 // Based on the modifying character, change the type and width if necessary.
212 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
224 s += poly ? "poly8" : "int8";
227 s += quad ? "x16" : "x8";
230 s += poly ? "poly16" : "int16";
233 s += quad ? "x8" : "x4";
239 s += quad ? "x4" : "x2";
245 s += quad ? "x2" : "x1";
251 s += quad ? "x8" : "x4";
257 s += quad ? "x4" : "x2";
260 throw "unhandled type!";
271 // Append _t, finishing the type string typedef type.
283 /// BuiltinTypeString - for a modifier and type, generate the clang
284 /// BuiltinsARM.def prototype code for the function. See the top of clang's
285 /// Builtins.def for a description of the type strings.
286 static std::string BuiltinTypeString(const char mod, StringRef typestr,
287 ClassKind ck, bool ret) {
300 // base type to get the type string for.
301 char type = ClassifyType(typestr, quad, poly, usgn);
303 // Based on the modifying character, change the type and width if necessary.
304 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
315 usgn = usgn | poly | ((ck == ClassI || ck == ClassW) && scal && type != 'f');
335 // Since the return value must be one type, return a vector type of the
336 // appropriate width which we will bitcast. An exception is made for
337 // returning structs of 2, 3, or 4 vectors which are returned in a sret-like
338 // fashion, storing them to a pointer arg.
340 if (mod == '2' || mod == '3' || mod == '4')
342 if (mod == 'f' || (ck != ClassB && type == 'f'))
343 return quad ? "V4f" : "V2f";
344 if (ck != ClassB && type == 's')
345 return quad ? "V8s" : "V4s";
346 if (ck != ClassB && type == 'i')
347 return quad ? "V4i" : "V2i";
348 if (ck != ClassB && type == 'l')
349 return quad ? "V2LLi" : "V1LLi";
351 return quad ? "V16c" : "V8c";
354 // Non-return array types are passed as individual vectors.
356 return quad ? "V16cV16c" : "V8cV8c";
358 return quad ? "V16cV16cV16c" : "V8cV8cV8c";
360 return quad ? "V16cV16cV16cV16c" : "V8cV8cV8cV8c";
362 if (mod == 'f' || (ck != ClassB && type == 'f'))
363 return quad ? "V4f" : "V2f";
364 if (ck != ClassB && type == 's')
365 return quad ? "V8s" : "V4s";
366 if (ck != ClassB && type == 'i')
367 return quad ? "V4i" : "V2i";
368 if (ck != ClassB && type == 'l')
369 return quad ? "V2LLi" : "V1LLi";
371 return quad ? "V16c" : "V8c";
374 /// StructTag - generate the name of the struct tag for a type.
375 /// These names are mandated by ARM's ABI.
376 static std::string StructTag(StringRef typestr) {
381 // base type to get the type string for.
382 char type = ClassifyType(typestr, quad, poly, usgn);
386 s += quad ? "128_" : "64_";
392 s += poly ? "poly8" : "int8";
395 s += poly ? "poly16" : "int16";
410 throw "unhandled type!";
414 // Append _t, finishing the struct tag name.
420 /// MangleName - Append a type or width suffix to a base neon function name,
421 /// and insert a 'q' in the appropriate location if the operation works on
422 /// 128b rather than 64b. E.g. turn "vst2_lane" into "vst2q_lane_f32", etc.
423 static std::string MangleName(const std::string &name, StringRef typestr,
425 if (name == "vcvt_f32_f16")
431 char type = ClassifyType(typestr, quad, poly, usgn);
433 std::string s = name;
438 case ClassS: s += poly ? "_p8" : usgn ? "_u8" : "_s8"; break;
439 case ClassI: s += "_i8"; break;
440 case ClassW: s += "_8"; break;
446 case ClassS: s += poly ? "_p16" : usgn ? "_u16" : "_s16"; break;
447 case ClassI: s += "_i16"; break;
448 case ClassW: s += "_16"; break;
454 case ClassS: s += usgn ? "_u32" : "_s32"; break;
455 case ClassI: s += "_i32"; break;
456 case ClassW: s += "_32"; break;
462 case ClassS: s += usgn ? "_u64" : "_s64"; break;
463 case ClassI: s += "_i64"; break;
464 case ClassW: s += "_64"; break;
471 case ClassI: s += "_f16"; break;
472 case ClassW: s += "_16"; break;
479 case ClassI: s += "_f32"; break;
480 case ClassW: s += "_32"; break;
485 throw "unhandled type!";
491 // Insert a 'q' before the first '_' character so that it ends up before
492 // _lane or _n on vector-scalar operations.
494 size_t pos = s.find('_');
495 s = s.insert(pos, "q");
500 // Generate the string "(argtype a, argtype b, ...)"
501 static std::string GenArgs(const std::string &proto, StringRef typestr) {
502 bool define = proto.find('i') != std::string::npos;
508 for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
510 s += TypeString(proto[i], typestr);
522 static std::string Duplicate(unsigned nElts, StringRef typestr,
523 const std::string &a) {
526 s = "(__neon_" + TypeString('d', typestr) + "){ ";
527 for (unsigned i = 0; i != nElts; ++i) {
537 // Generate the definition for this intrinsic, e.g. "a + b" for OpAdd.
538 // If structTypes is true, the NEON types are structs of vector types rather
539 // than vector types, and the call becomes "a.val + b.val"
540 static std::string GenOpString(OpKind op, const std::string &proto,
541 StringRef typestr, bool structTypes = true) {
542 bool dummy, quad = false;
543 char type = ClassifyType(typestr, quad, dummy, dummy);
546 case 'c': nElts = 8; break;
547 case 's': nElts = 4; break;
548 case 'i': nElts = 2; break;
549 case 'l': nElts = 1; break;
550 case 'h': nElts = 4; break;
551 case 'f': nElts = 2; break;
554 std::string ts = TypeString(proto[0], typestr);
555 std::string s = ts + " r; r";
563 if (proto.size() > 1)
564 a = (structTypes && proto[1] != 'l' && proto[1] != 's') ? "a.val" : "a";
565 b = structTypes ? "b.val" : "b";
566 c = structTypes ? "c.val" : "c";
576 b = Duplicate(nElts << (int)quad, typestr, "b");
581 c = Duplicate(nElts << (int)quad, typestr, "c");
583 s += a + " + ( " + b + " * " + c + " )";
586 c = Duplicate(nElts << (int)quad, typestr, "c");
588 s += a + " - ( " + b + " * " + c + " )";
591 s += "(__neon_" + ts + ")(" + a + " == " + b + ")";
594 s += "(__neon_" + ts + ")(" + a + " >= " + b + ")";
597 s += "(__neon_" + ts + ")(" + a + " <= " + b + ")";
600 s += "(__neon_" + ts + ")(" + a + " > " + b + ")";
603 s += "(__neon_" + ts + ")(" + a + " < " + b + ")";
627 s += "(__neon_" + ts + ")" + a;
630 s += "__builtin_shufflevector((__neon_int64x1_t)" + a;
631 s += ", (__neon_int64x1_t)" + b + ", 0, 1)";
634 s += "(__neon_int64x1_t)(((__neon_int64x2_t)" + a + ")[1])";
637 s += "(__neon_int64x1_t)(((__neon_int64x2_t)" + a + ")[0])";
640 s += Duplicate(nElts << (int)quad, typestr, a);
643 // ((0 & 1) | (~0 & 2))
644 ts = TypeString(proto[1], typestr);
645 s += "( " + a + " & (__neon_" + ts + ")" + b + ") | ";
646 s += "(~" + a + " & (__neon_" + ts + ")" + c + ")";
649 s += "__builtin_shufflevector(" + a + ", " + a;
650 for (unsigned i = 2; i <= nElts << (int)quad; i += 2)
651 for (unsigned j = 0; j != 2; ++j)
652 s += ", " + utostr(i - j - 1);
657 s += "__builtin_shufflevector(" + a + ", " + a;
658 for (unsigned i = nElts; i <= nElts << (1 + (int)quad); i += nElts)
659 for (unsigned j = 0; j != nElts; ++j)
660 s += ", " + utostr(i - j - 1);
664 s += "__builtin_shufflevector(" + a + ", " + a;
665 for (unsigned i = nElts; i <= nElts << (int)quad; i += nElts)
666 for (unsigned j = 0; j != nElts; ++j)
667 s += ", " + utostr(i - j - 1);
671 throw "unknown OpKind!";
678 static unsigned GetNeonEnum(const std::string &proto, StringRef typestr) {
679 unsigned mod = proto[0];
682 if (mod == 'v' || mod == 'f')
692 // Base type to get the type string for.
693 char type = ClassifyType(typestr, quad, poly, usgn);
695 // Based on the modifying character, change the type and width if necessary.
696 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
700 if (quad && proto[1] != 'g')
723 throw "unhandled type!";
729 // Generate the definition for this intrinsic, e.g. __builtin_neon_cls(a)
730 // If structTypes is true, the NEON types are structs of vector types rather
731 // than vector types, and the call becomes __builtin_neon_cls(a.val)
732 static std::string GenBuiltin(const std::string &name, const std::string &proto,
733 StringRef typestr, ClassKind ck,
734 bool structTypes = true) {
735 bool dummy, quad = false;
736 char type = ClassifyType(typestr, quad, dummy, dummy);
739 case 'c': nElts = 8; break;
740 case 's': nElts = 4; break;
741 case 'i': nElts = 2; break;
742 case 'l': nElts = 1; break;
743 case 'h': nElts = 4; break;
744 case 'f': nElts = 2; break;
746 if (quad) nElts <<= 1;
751 // If this builtin returns a struct 2, 3, or 4 vectors, pass it as an implicit
752 // sret-like argument.
753 bool sret = (proto[0] == '2' || proto[0] == '3' || proto[0] == '4');
755 // If this builtin takes an immediate argument, we need to #define it rather
756 // than use a standard declaration, so that SemaChecking can range check
757 // the immediate passed by the user.
758 bool define = proto.find('i') != std::string::npos;
760 // If all types are the same size, bitcasting the args will take care
761 // of arg checking. The actual signedness etc. will be taken care of with
763 if (proto.find('s') == std::string::npos)
766 if (proto[0] != 'v') {
767 std::string ts = TypeString(proto[0], typestr);
771 s += "({ " + ts + " r; ";
772 else if (proto[0] != 's')
773 s += "(" + ts + "){(__neon_" + ts + ")";
778 if (structTypes && proto[0] != 's' && proto[0] != 'i' && proto[0] != 'l')
785 bool splat = proto.find('a') != std::string::npos;
787 s += "__builtin_neon_";
789 std::string vname(name, 0, name.size()-2);
790 s += MangleName(vname, typestr, ck);
792 s += MangleName(name, typestr, ck);
796 // Pass the address of the return variable as the first argument to sret-like
801 for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
802 std::string args = std::string(&arg, 1);
804 args = "(" + args + ")";
806 // Handle multiple-vector values specially, emitting each subvector as an
807 // argument to the __builtin.
808 if (structTypes && (proto[i] == '2' || proto[i] == '3' || proto[i] == '4')){
809 for (unsigned vi = 0, ve = proto[i] - '0'; vi != ve; ++vi) {
810 s += args + ".val[" + utostr(vi) + "].val";
820 if (splat && (i + 1) == e)
821 s += Duplicate(nElts, typestr, args);
825 if (structTypes && proto[i] != 's' && proto[i] != 'i' && proto[i] != 'l' &&
826 proto[i] != 'p' && proto[i] != 'c' && proto[i] != 'a') {
833 // Extra constant integer to hold type class enum for this function, e.g. s8
835 s += ", " + utostr(GetNeonEnum(proto, typestr));
842 if (proto[0] != 'v') {
846 else if (proto[0] != 's')
855 static std::string GenBuiltinDef(const std::string &name,
856 const std::string &proto,
857 StringRef typestr, ClassKind ck) {
858 std::string s("BUILTIN(__builtin_neon_");
860 // If all types are the same size, bitcasting the args will take care
861 // of arg checking. The actual signedness etc. will be taken care of with
863 if (proto.find('s') == std::string::npos)
866 s += MangleName(name, typestr, ck);
869 for (unsigned i = 0, e = proto.size(); i != e; ++i)
870 s += BuiltinTypeString(proto[i], typestr, ck, i == 0);
872 // Extra constant integer to hold type class enum for this function, e.g. s8
880 /// run - Read the records in arm_neon.td and output arm_neon.h. arm_neon.h
881 /// is comprised of type definitions and function declarations.
882 void NeonEmitter::run(raw_ostream &OS) {
883 EmitSourceFileHeader("ARM NEON Header", OS);
885 // FIXME: emit license into file?
887 OS << "#ifndef __ARM_NEON_H\n";
888 OS << "#define __ARM_NEON_H\n\n";
890 OS << "#ifndef __ARM_NEON__\n";
891 OS << "#error \"NEON support not enabled\"\n";
894 OS << "#include <stdint.h>\n\n";
896 // Emit NEON-specific scalar typedefs.
897 OS << "typedef float float32_t;\n";
898 OS << "typedef uint8_t poly8_t;\n";
899 OS << "typedef uint16_t poly16_t;\n";
900 OS << "typedef uint16_t float16_t;\n";
902 // Emit Neon vector typedefs.
903 std::string TypedefTypes("cQcsQsiQilQlUcQUcUsQUsUiQUiUlQUlhQhfQfPcQPcPsQPs");
904 SmallVector<StringRef, 24> TDTypeVec;
905 ParseTypes(0, TypedefTypes, TDTypeVec);
907 // Emit vector typedefs.
908 for (unsigned v = 1; v != 5; ++v) {
909 for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
910 bool dummy, quad = false;
911 (void) ClassifyType(TDTypeVec[i], quad, dummy, dummy);
912 OS << "typedef __attribute__(( __vector_size__(";
914 OS << utostr(8*v*(quad ? 2 : 1)) << ") )) ";
918 OS << TypeString('s', TDTypeVec[i]);
921 char t = (v == 1) ? 'd' : '0' + v;
922 OS << TypeString(t, TDTypeVec[i]) << ";\n";
927 // Emit struct typedefs.
928 for (unsigned vi = 1; vi != 5; ++vi) {
929 for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
930 std::string ts = TypeString('d', TDTypeVec[i], vi == 1);
931 std::string vs = TypeString((vi > 1) ? '0' + vi : 'd', TDTypeVec[i]);
932 std::string tag = (vi > 1) ? vs : StructTag(TDTypeVec[i]);
933 OS << "typedef struct " << tag << " {\n";
934 OS << " " << ts << " val";
936 OS << "[" << utostr(vi) << "]";
937 OS << ";\n} " << vs << ";\n\n";
941 OS << "#define __ai static __attribute__((__always_inline__))\n\n";
943 std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
945 // Unique the return+pattern types, and assign them.
946 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
948 std::string name = LowercaseString(R->getName());
949 std::string Proto = R->getValueAsString("Prototype");
950 std::string Types = R->getValueAsString("Types");
952 SmallVector<StringRef, 16> TypeVec;
953 ParseTypes(R, Types, TypeVec);
955 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
957 bool define = Proto.find('i') != std::string::npos;
959 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
960 assert(!Proto.empty() && "");
962 // static always inline + return type
966 OS << "__ai " << TypeString(Proto[0], TypeVec[ti]);
968 // Function name with type suffix
969 OS << " " << MangleName(name, TypeVec[ti], ClassS);
971 // Function arguments
972 OS << GenArgs(Proto, TypeVec[ti]);
981 OS << GenOpString(k, Proto, TypeVec[ti]);
983 if (R->getSuperClasses().size() < 2)
984 throw TGError(R->getLoc(), "Builtin has no class kind");
986 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
989 throw TGError(R->getLoc(), "Builtin has no class kind");
990 OS << GenBuiltin(name, Proto, TypeVec[ti], ck);
998 OS << "#undef __ai\n\n";
999 OS << "#endif /* __ARM_NEON_H */\n";
1002 static unsigned RangeFromType(StringRef typestr) {
1003 // base type to get the type string for.
1004 bool quad = false, dummy = false;
1005 char type = ClassifyType(typestr, quad, dummy, dummy);
1009 return (8 << (int)quad) - 1;
1012 return (4 << (int)quad) - 1;
1015 return (2 << (int)quad) - 1;
1017 return (1 << (int)quad) - 1;
1019 throw "unhandled type!";
1022 assert(0 && "unreachable");
1026 /// runHeader - Emit a file with sections defining:
1027 /// 1. the NEON section of BuiltinsARM.def.
1028 /// 2. the SemaChecking code for the type overload checking.
1029 /// 3. the SemaChecking code for validation of intrinsic immedate arguments.
1030 void NeonEmitter::runHeader(raw_ostream &OS) {
1031 std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
1033 StringMap<OpKind> EmittedMap;
1035 // Generate BuiltinsARM.def for NEON
1036 OS << "#ifdef GET_NEON_BUILTINS\n";
1037 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1039 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1043 std::string Proto = R->getValueAsString("Prototype");
1045 // Functions with 'a' (the splat code) in the type prototype should not get
1046 // their own builtin as they use the non-splat variant.
1047 if (Proto.find('a') != std::string::npos)
1050 std::string Types = R->getValueAsString("Types");
1051 SmallVector<StringRef, 16> TypeVec;
1052 ParseTypes(R, Types, TypeVec);
1054 if (R->getSuperClasses().size() < 2)
1055 throw TGError(R->getLoc(), "Builtin has no class kind");
1057 std::string name = LowercaseString(R->getName());
1058 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
1060 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1061 // Generate the BuiltinsARM.def declaration for this builtin, ensuring
1062 // that each unique BUILTIN() macro appears only once in the output
1064 std::string bd = GenBuiltinDef(name, Proto, TypeVec[ti], ck);
1065 if (EmittedMap.count(bd))
1068 EmittedMap[bd] = OpNone;
1074 // Generate the overloaded type checking code for SemaChecking.cpp
1075 OS << "#ifdef GET_NEON_OVERLOAD_CHECK\n";
1076 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1078 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1082 std::string Proto = R->getValueAsString("Prototype");
1083 std::string Types = R->getValueAsString("Types");
1084 std::string name = LowercaseString(R->getName());
1086 // Functions with 'a' (the splat code) in the type prototype should not get
1087 // their own builtin as they use the non-splat variant.
1088 if (Proto.find('a') != std::string::npos)
1091 // Functions which have a scalar argument cannot be overloaded, no need to
1092 // check them if we are emitting the type checking code.
1093 if (Proto.find('s') != std::string::npos)
1096 SmallVector<StringRef, 16> TypeVec;
1097 ParseTypes(R, Types, TypeVec);
1099 if (R->getSuperClasses().size() < 2)
1100 throw TGError(R->getLoc(), "Builtin has no class kind");
1102 int si = -1, qi = -1;
1103 unsigned mask = 0, qmask = 0;
1104 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1105 // Generate the switch case(s) for this builtin for the type validation.
1106 bool quad = false, poly = false, usgn = false;
1107 (void) ClassifyType(TypeVec[ti], quad, poly, usgn);
1111 qmask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
1114 mask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
1118 OS << "case ARM::BI__builtin_neon_"
1119 << MangleName(name, TypeVec[si], ClassB)
1120 << ": mask = " << "0x" << utohexstr(mask) << "; break;\n";
1122 OS << "case ARM::BI__builtin_neon_"
1123 << MangleName(name, TypeVec[qi], ClassB)
1124 << ": mask = " << "0x" << utohexstr(qmask) << "; break;\n";
1128 // Generate the intrinsic range checking code for shift/lane immediates.
1129 OS << "#ifdef GET_NEON_IMMEDIATE_CHECK\n";
1130 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1133 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1137 std::string name = LowercaseString(R->getName());
1138 std::string Proto = R->getValueAsString("Prototype");
1139 std::string Types = R->getValueAsString("Types");
1141 // Functions with 'a' (the splat code) in the type prototype should not get
1142 // their own builtin as they use the non-splat variant.
1143 if (Proto.find('a') != std::string::npos)
1146 // Functions which do not have an immediate do not need to have range
1147 // checking code emitted.
1148 if (Proto.find('i') == std::string::npos)
1151 SmallVector<StringRef, 16> TypeVec;
1152 ParseTypes(R, Types, TypeVec);
1154 if (R->getSuperClasses().size() < 2)
1155 throw TGError(R->getLoc(), "Builtin has no class kind");
1157 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
1159 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1160 std::string namestr, shiftstr, rangestr;
1162 // Builtins which are overloaded by type will need to have their upper
1163 // bound computed at Sema time based on the type constant.
1164 if (Proto.find('s') == std::string::npos) {
1166 if (R->getValueAsBit("isShift")) {
1167 shiftstr = ", true";
1169 // Right shifts have an 'r' in the name, left shifts do not.
1170 if (name.find('r') != std::string::npos)
1171 rangestr = "l = 1; ";
1173 rangestr += "u = RFT(TV" + shiftstr + ")";
1175 rangestr = "u = " + utostr(RangeFromType(TypeVec[ti]));
1177 // Make sure cases appear only once by uniquing them in a string map.
1178 namestr = MangleName(name, TypeVec[ti], ck);
1179 if (EmittedMap.count(namestr))
1181 EmittedMap[namestr] = OpNone;
1183 // Calculate the index of the immediate that should be range checked.
1184 unsigned immidx = 0;
1186 // Builtins that return a struct of multiple vectors have an extra
1187 // leading arg for the struct return.
1188 if (Proto[0] == '2' || Proto[0] == '3' || Proto[0] == '4')
1191 // Add one to the index for each argument until we reach the immediate
1192 // to be checked. Structs of vectors are passed as multiple arguments.
1193 for (unsigned ii = 1, ie = Proto.size(); ii != ie; ++ii) {
1194 switch (Proto[ii]) {
1195 default: immidx += 1; break;
1196 case '2': immidx += 2; break;
1197 case '3': immidx += 3; break;
1198 case '4': immidx += 4; break;
1199 case 'i': ie = ii + 1; break;
1202 OS << "case ARM::BI__builtin_neon_" << MangleName(name, TypeVec[ti], ck)
1203 << ": i = " << immidx << "; " << rangestr << "; break;\n";