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 narrow!";
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) {
200 /// TypeString - for a modifier and type, generate the name of the typedef for
201 /// that type. QUc -> uint8x8_t.
202 static std::string TypeString(const char mod, StringRef typestr) {
215 // base type to get the type string for.
216 char type = ClassifyType(typestr, quad, poly, usgn);
218 // Based on the modifying character, change the type and width if necessary.
219 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
228 s += poly ? "poly8" : "int8";
231 s += quad ? "x16" : "x8";
234 s += poly ? "poly16" : "int16";
237 s += quad ? "x8" : "x4";
243 s += quad ? "x4" : "x2";
249 s += quad ? "x2" : "x1";
255 s += quad ? "x8" : "x4";
261 s += quad ? "x4" : "x2";
264 throw "unhandled type!";
275 // Append _t, finishing the type string typedef type.
287 /// BuiltinTypeString - for a modifier and type, generate the clang
288 /// BuiltinsARM.def prototype code for the function. See the top of clang's
289 /// Builtins.def for a description of the type strings.
290 static std::string BuiltinTypeString(const char mod, StringRef typestr,
291 ClassKind ck, bool ret) {
304 // base type to get the type string for.
305 char type = ClassifyType(typestr, quad, poly, usgn);
307 // Based on the modifying character, change the type and width if necessary.
308 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
310 // All pointers are void* pointers. Change type to 'v' now.
316 // Treat half-float ('h') types as unsigned short ('s') types.
321 usgn = usgn | poly | ((ck == ClassI || ck == ClassW) && scal && type != 'f');
329 if (type == 'l') // 64-bit long
341 // Since the return value must be one type, return a vector type of the
342 // appropriate width which we will bitcast. An exception is made for
343 // returning structs of 2, 3, or 4 vectors which are returned in a sret-like
344 // fashion, storing them to a pointer arg.
346 if (mod >= '2' && mod <= '4')
347 return "vv*"; // void result with void* first argument
348 if (mod == 'f' || (ck != ClassB && type == 'f'))
349 return quad ? "V4f" : "V2f";
350 if (ck != ClassB && type == 's')
351 return quad ? "V8s" : "V4s";
352 if (ck != ClassB && type == 'i')
353 return quad ? "V4i" : "V2i";
354 if (ck != ClassB && type == 'l')
355 return quad ? "V2LLi" : "V1LLi";
357 return quad ? "V16c" : "V8c";
360 // Non-return array types are passed as individual vectors.
362 return quad ? "V16cV16c" : "V8cV8c";
364 return quad ? "V16cV16cV16c" : "V8cV8cV8c";
366 return quad ? "V16cV16cV16cV16c" : "V8cV8cV8cV8c";
368 if (mod == 'f' || (ck != ClassB && type == 'f'))
369 return quad ? "V4f" : "V2f";
370 if (ck != ClassB && type == 's')
371 return quad ? "V8s" : "V4s";
372 if (ck != ClassB && type == 'i')
373 return quad ? "V4i" : "V2i";
374 if (ck != ClassB && type == 'l')
375 return quad ? "V2LLi" : "V1LLi";
377 return quad ? "V16c" : "V8c";
380 /// MangleName - Append a type or width suffix to a base neon function name,
381 /// and insert a 'q' in the appropriate location if the operation works on
382 /// 128b rather than 64b. E.g. turn "vst2_lane" into "vst2q_lane_f32", etc.
383 static std::string MangleName(const std::string &name, StringRef typestr,
385 if (name == "vcvt_f32_f16")
391 char type = ClassifyType(typestr, quad, poly, usgn);
393 std::string s = name;
398 case ClassS: s += poly ? "_p8" : usgn ? "_u8" : "_s8"; break;
399 case ClassI: s += "_i8"; break;
400 case ClassW: s += "_8"; break;
406 case ClassS: s += poly ? "_p16" : usgn ? "_u16" : "_s16"; break;
407 case ClassI: s += "_i16"; break;
408 case ClassW: s += "_16"; break;
414 case ClassS: s += usgn ? "_u32" : "_s32"; break;
415 case ClassI: s += "_i32"; break;
416 case ClassW: s += "_32"; break;
422 case ClassS: s += usgn ? "_u64" : "_s64"; break;
423 case ClassI: s += "_i64"; break;
424 case ClassW: s += "_64"; break;
431 case ClassI: s += "_f16"; break;
432 case ClassW: s += "_16"; break;
439 case ClassI: s += "_f32"; break;
440 case ClassW: s += "_32"; break;
445 throw "unhandled type!";
451 // Insert a 'q' before the first '_' character so that it ends up before
452 // _lane or _n on vector-scalar operations.
454 size_t pos = s.find('_');
455 s = s.insert(pos, "q");
460 // Generate the string "(argtype a, argtype b, ...)"
461 static std::string GenArgs(const std::string &proto, StringRef typestr) {
462 bool define = proto.find('i') != std::string::npos;
468 for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
470 s += TypeString(proto[i], typestr);
482 static std::string Duplicate(unsigned nElts, StringRef typestr,
483 const std::string &a) {
486 s = "(" + TypeString('d', typestr) + "){ ";
487 for (unsigned i = 0; i != nElts; ++i) {
497 static unsigned GetNumElements(StringRef typestr, bool &quad) {
500 char type = ClassifyType(typestr, quad, dummy, dummy);
503 case 'c': nElts = 8; break;
504 case 's': nElts = 4; break;
505 case 'i': nElts = 2; break;
506 case 'l': nElts = 1; break;
507 case 'h': nElts = 4; break;
508 case 'f': nElts = 2; break;
510 throw "unhandled type!";
513 if (quad) nElts <<= 1;
517 // Generate the definition for this intrinsic, e.g. "a + b" for OpAdd.
518 static std::string GenOpString(OpKind op, const std::string &proto,
521 unsigned nElts = GetNumElements(typestr, quad);
523 std::string ts = TypeString(proto[0], typestr);
525 if (op == OpHi || op == OpLo) {
526 s = "union { " + ts + " r; double d; } u; u.d";
541 s += "a * " + Duplicate(nElts, typestr, "b");
547 s += "a + (b * " + Duplicate(nElts, typestr, "c") + ")";
553 s += "a - (b * " + Duplicate(nElts, typestr, "c") + ")";
559 s += "(" + ts + ")(a == b)";
562 s += "(" + ts + ")(a >= b)";
565 s += "(" + ts + ")(a <= b)";
568 s += "(" + ts + ")(a > b)";
571 s += "(" + ts + ")(a < b)";
595 s += "(" + ts + ")a";
598 s += "__builtin_shufflevector((int64x1_t)a";
599 s += ", (int64x1_t)b, 0, 1)";
602 s += "(((float64x2_t)a)[1])";
605 s += "(((float64x2_t)a)[0])";
608 s += Duplicate(nElts, typestr, "a");
611 // ((0 & 1) | (~0 & 2))
612 ts = TypeString(proto[1], typestr);
613 s += "(a & (" + ts + ")b) | ";
614 s += "(~a & (" + ts + ")c)";
617 s += "__builtin_shufflevector(a, a";
618 for (unsigned i = 2; i <= nElts; i += 2)
619 for (unsigned j = 0; j != 2; ++j)
620 s += ", " + utostr(i - j - 1);
624 unsigned WordElts = nElts >> (1 + (int)quad);
625 s += "__builtin_shufflevector(a, a";
626 for (unsigned i = WordElts; i <= nElts; i += WordElts)
627 for (unsigned j = 0; j != WordElts; ++j)
628 s += ", " + utostr(i - j - 1);
633 unsigned DblWordElts = nElts >> (int)quad;
634 s += "__builtin_shufflevector(a, a";
635 for (unsigned i = DblWordElts; i <= nElts; i += DblWordElts)
636 for (unsigned j = 0; j != DblWordElts; ++j)
637 s += ", " + utostr(i - j - 1);
642 throw "unknown OpKind!";
645 if (op == OpHi || op == OpLo)
646 s += "; return u.r;";
652 static unsigned GetNeonEnum(const std::string &proto, StringRef typestr) {
653 unsigned mod = proto[0];
656 if (mod == 'v' || mod == 'f')
666 // Base type to get the type string for.
667 char type = ClassifyType(typestr, quad, poly, usgn);
669 // Based on the modifying character, change the type and width if necessary.
670 type = ModType(mod, type, quad, poly, usgn, scal, cnst, pntr);
674 if (quad && proto[1] != 'g')
697 throw "unhandled type!";
703 // Generate the definition for this intrinsic, e.g. __builtin_neon_cls(a)
704 static std::string GenBuiltin(const std::string &name, const std::string &proto,
705 StringRef typestr, ClassKind ck) {
709 // If this builtin returns a struct 2, 3, or 4 vectors, pass it as an implicit
710 // sret-like argument.
711 bool sret = (proto[0] >= '2' && proto[0] <= '4');
713 // If this builtin takes an immediate argument, we need to #define it rather
714 // than use a standard declaration, so that SemaChecking can range check
715 // the immediate passed by the user.
716 bool define = proto.find('i') != std::string::npos;
718 // Check if the prototype has a scalar operand with the type of the vector
719 // elements. If not, bitcasting the args will take care of arg checking.
720 // The actual signedness etc. will be taken care of with special enums.
721 if (proto.find('s') == std::string::npos)
724 if (proto[0] != 'v') {
725 std::string ts = TypeString(proto[0], typestr);
729 s += "({ " + ts + " r; ";
730 else if (proto[0] != 's')
735 s += ts + " r; r = ";
739 bool splat = proto.find('a') != std::string::npos;
741 s += "__builtin_neon_";
743 // Call the non-splat builtin: chop off the "_n" suffix from the name.
744 std::string vname(name, 0, name.size()-2);
745 s += MangleName(vname, typestr, ck);
747 s += MangleName(name, typestr, ck);
751 // Pass the address of the return variable as the first argument to sret-like
756 for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
757 std::string args = std::string(&arg, 1);
759 // Wrap macro arguments in parenthesis.
761 args = "(" + args + ")";
763 bool argQuad = false;
764 bool argPoly = false;
765 bool argUsgn = false;
766 bool argScalar = false;
768 char argType = ClassifyType(typestr, argQuad, argPoly, argUsgn);
769 argType = ModType(proto[i], argType, argQuad, argPoly, argUsgn, argScalar,
772 // Handle multiple-vector values specially, emitting each subvector as an
773 // argument to the __builtin.
774 if (proto[i] >= '2' && proto[i] <= '4') {
775 // Check if an explicit cast is needed.
776 if (argType != 'c' || argPoly || argUsgn)
777 args = (argQuad ? "(int8x16_t)" : "(int8x8_t)") + args;
779 for (unsigned vi = 0, ve = proto[i] - '0'; vi != ve; ++vi) {
780 s += args + ".val[" + utostr(vi) + "]";
790 // Check if an explicit cast is needed.
792 ((ck == ClassB && argType != 'c') || argPoly || argUsgn)) {
793 std::string argTypeStr = "c";
795 argTypeStr = argType;
797 argTypeStr = "Q" + argTypeStr;
798 args = "(" + TypeString('d', argTypeStr) + ")" + args;
801 if (splat && (i + 1) == e)
802 s += Duplicate(GetNumElements(typestr, argQuad), typestr, args);
809 // Extra constant integer to hold type class enum for this function, e.g. s8
811 s += ", " + utostr(GetNeonEnum(proto, typestr));
818 if (proto[0] != 'v') {
829 static std::string GenBuiltinDef(const std::string &name,
830 const std::string &proto,
831 StringRef typestr, ClassKind ck) {
832 std::string s("BUILTIN(__builtin_neon_");
834 // If all types are the same size, bitcasting the args will take care
835 // of arg checking. The actual signedness etc. will be taken care of with
837 if (proto.find('s') == std::string::npos)
840 s += MangleName(name, typestr, ck);
843 for (unsigned i = 0, e = proto.size(); i != e; ++i)
844 s += BuiltinTypeString(proto[i], typestr, ck, i == 0);
846 // Extra constant integer to hold type class enum for this function, e.g. s8
854 /// run - Read the records in arm_neon.td and output arm_neon.h. arm_neon.h
855 /// is comprised of type definitions and function declarations.
856 void NeonEmitter::run(raw_ostream &OS) {
857 EmitSourceFileHeader("ARM NEON Header", OS);
859 // FIXME: emit license into file?
861 OS << "#ifndef __ARM_NEON_H\n";
862 OS << "#define __ARM_NEON_H\n\n";
864 OS << "#ifndef __ARM_NEON__\n";
865 OS << "#error \"NEON support not enabled\"\n";
868 OS << "#include <stdint.h>\n\n";
870 // Emit NEON-specific scalar typedefs.
871 OS << "typedef float float32_t;\n";
872 OS << "typedef int8_t poly8_t;\n";
873 OS << "typedef int16_t poly16_t;\n";
874 OS << "typedef uint16_t float16_t;\n";
876 // Emit Neon vector typedefs.
877 std::string TypedefTypes("cQcsQsiQilQlUcQUcUsQUsUiQUiUlQUlhQhfQfPcQPcPsQPs");
878 SmallVector<StringRef, 24> TDTypeVec;
879 ParseTypes(0, TypedefTypes, TDTypeVec);
881 // Emit vector typedefs.
882 for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
883 bool dummy, quad = false, poly = false;
884 (void) ClassifyType(TDTypeVec[i], quad, poly, dummy);
886 OS << "typedef __attribute__((neon_polyvector_type(";
888 OS << "typedef __attribute__((neon_vector_type(";
890 unsigned nElts = GetNumElements(TDTypeVec[i], quad);
891 OS << utostr(nElts) << "))) ";
895 OS << TypeString('s', TDTypeVec[i]);
896 OS << " " << TypeString('d', TDTypeVec[i]) << ";\n";
899 OS << "typedef __attribute__((__vector_size__(8))) "
900 "double float64x1_t;\n";
901 OS << "typedef __attribute__((__vector_size__(16))) "
902 "double float64x2_t;\n";
905 // Emit struct typedefs.
906 for (unsigned vi = 2; vi != 5; ++vi) {
907 for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
908 std::string ts = TypeString('d', TDTypeVec[i]);
909 std::string vs = TypeString('0' + vi, TDTypeVec[i]);
910 OS << "typedef struct " << vs << " {\n";
911 OS << " " << ts << " val";
912 OS << "[" << utostr(vi) << "]";
918 OS << "#define __ai static __attribute__((__always_inline__))\n\n";
920 std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
922 // Unique the return+pattern types, and assign them.
923 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
925 std::string name = LowercaseString(R->getName());
926 std::string Proto = R->getValueAsString("Prototype");
927 std::string Types = R->getValueAsString("Types");
929 SmallVector<StringRef, 16> TypeVec;
930 ParseTypes(R, Types, TypeVec);
932 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
934 bool define = Proto.find('i') != std::string::npos;
936 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
937 assert(!Proto.empty() && "");
939 // static always inline + return type
943 OS << "__ai " << TypeString(Proto[0], TypeVec[ti]);
945 // Function name with type suffix
946 OS << " " << MangleName(name, TypeVec[ti], ClassS);
948 // Function arguments
949 OS << GenArgs(Proto, TypeVec[ti]);
958 OS << GenOpString(k, Proto, TypeVec[ti]);
960 if (R->getSuperClasses().size() < 2)
961 throw TGError(R->getLoc(), "Builtin has no class kind");
963 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
966 throw TGError(R->getLoc(), "Builtin has no class kind");
967 OS << GenBuiltin(name, Proto, TypeVec[ti], ck);
975 OS << "#undef __ai\n\n";
976 OS << "#endif /* __ARM_NEON_H */\n";
979 static unsigned RangeFromType(StringRef typestr) {
980 // base type to get the type string for.
981 bool quad = false, dummy = false;
982 char type = ClassifyType(typestr, quad, dummy, dummy);
986 return (8 << (int)quad) - 1;
989 return (4 << (int)quad) - 1;
992 return (2 << (int)quad) - 1;
994 return (1 << (int)quad) - 1;
996 throw "unhandled type!";
999 assert(0 && "unreachable");
1003 /// runHeader - Emit a file with sections defining:
1004 /// 1. the NEON section of BuiltinsARM.def.
1005 /// 2. the SemaChecking code for the type overload checking.
1006 /// 3. the SemaChecking code for validation of intrinsic immedate arguments.
1007 void NeonEmitter::runHeader(raw_ostream &OS) {
1008 std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
1010 StringMap<OpKind> EmittedMap;
1012 // Generate BuiltinsARM.def for NEON
1013 OS << "#ifdef GET_NEON_BUILTINS\n";
1014 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1016 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1020 std::string Proto = R->getValueAsString("Prototype");
1022 // Functions with 'a' (the splat code) in the type prototype should not get
1023 // their own builtin as they use the non-splat variant.
1024 if (Proto.find('a') != std::string::npos)
1027 std::string Types = R->getValueAsString("Types");
1028 SmallVector<StringRef, 16> TypeVec;
1029 ParseTypes(R, Types, TypeVec);
1031 if (R->getSuperClasses().size() < 2)
1032 throw TGError(R->getLoc(), "Builtin has no class kind");
1034 std::string name = LowercaseString(R->getName());
1035 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
1037 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1038 // Generate the BuiltinsARM.def declaration for this builtin, ensuring
1039 // that each unique BUILTIN() macro appears only once in the output
1041 std::string bd = GenBuiltinDef(name, Proto, TypeVec[ti], ck);
1042 if (EmittedMap.count(bd))
1045 EmittedMap[bd] = OpNone;
1051 // Generate the overloaded type checking code for SemaChecking.cpp
1052 OS << "#ifdef GET_NEON_OVERLOAD_CHECK\n";
1053 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1055 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1059 std::string Proto = R->getValueAsString("Prototype");
1060 std::string Types = R->getValueAsString("Types");
1061 std::string name = LowercaseString(R->getName());
1063 // Functions with 'a' (the splat code) in the type prototype should not get
1064 // their own builtin as they use the non-splat variant.
1065 if (Proto.find('a') != std::string::npos)
1068 // Functions which have a scalar argument cannot be overloaded, no need to
1069 // check them if we are emitting the type checking code.
1070 if (Proto.find('s') != std::string::npos)
1073 SmallVector<StringRef, 16> TypeVec;
1074 ParseTypes(R, Types, TypeVec);
1076 if (R->getSuperClasses().size() < 2)
1077 throw TGError(R->getLoc(), "Builtin has no class kind");
1079 int si = -1, qi = -1;
1080 unsigned mask = 0, qmask = 0;
1081 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1082 // Generate the switch case(s) for this builtin for the type validation.
1083 bool quad = false, poly = false, usgn = false;
1084 (void) ClassifyType(TypeVec[ti], quad, poly, usgn);
1088 qmask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
1091 mask |= 1 << GetNeonEnum(Proto, TypeVec[ti]);
1095 OS << "case ARM::BI__builtin_neon_"
1096 << MangleName(name, TypeVec[si], ClassB)
1097 << ": mask = " << "0x" << utohexstr(mask) << "; break;\n";
1099 OS << "case ARM::BI__builtin_neon_"
1100 << MangleName(name, TypeVec[qi], ClassB)
1101 << ": mask = " << "0x" << utohexstr(qmask) << "; break;\n";
1105 // Generate the intrinsic range checking code for shift/lane immediates.
1106 OS << "#ifdef GET_NEON_IMMEDIATE_CHECK\n";
1107 for (unsigned i = 0, e = RV.size(); i != e; ++i) {
1110 OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
1114 std::string name = LowercaseString(R->getName());
1115 std::string Proto = R->getValueAsString("Prototype");
1116 std::string Types = R->getValueAsString("Types");
1118 // Functions with 'a' (the splat code) in the type prototype should not get
1119 // their own builtin as they use the non-splat variant.
1120 if (Proto.find('a') != std::string::npos)
1123 // Functions which do not have an immediate do not need to have range
1124 // checking code emitted.
1125 if (Proto.find('i') == std::string::npos)
1128 SmallVector<StringRef, 16> TypeVec;
1129 ParseTypes(R, Types, TypeVec);
1131 if (R->getSuperClasses().size() < 2)
1132 throw TGError(R->getLoc(), "Builtin has no class kind");
1134 ClassKind ck = ClassMap[R->getSuperClasses()[1]];
1136 for (unsigned ti = 0, te = TypeVec.size(); ti != te; ++ti) {
1137 std::string namestr, shiftstr, rangestr;
1139 // Builtins which are overloaded by type will need to have their upper
1140 // bound computed at Sema time based on the type constant.
1141 if (Proto.find('s') == std::string::npos) {
1143 if (R->getValueAsBit("isShift")) {
1144 shiftstr = ", true";
1146 // Right shifts have an 'r' in the name, left shifts do not.
1147 if (name.find('r') != std::string::npos)
1148 rangestr = "l = 1; ";
1150 rangestr += "u = RFT(TV" + shiftstr + ")";
1152 rangestr = "u = " + utostr(RangeFromType(TypeVec[ti]));
1154 // Make sure cases appear only once by uniquing them in a string map.
1155 namestr = MangleName(name, TypeVec[ti], ck);
1156 if (EmittedMap.count(namestr))
1158 EmittedMap[namestr] = OpNone;
1160 // Calculate the index of the immediate that should be range checked.
1161 unsigned immidx = 0;
1163 // Builtins that return a struct of multiple vectors have an extra
1164 // leading arg for the struct return.
1165 if (Proto[0] >= '2' && Proto[0] <= '4')
1168 // Add one to the index for each argument until we reach the immediate
1169 // to be checked. Structs of vectors are passed as multiple arguments.
1170 for (unsigned ii = 1, ie = Proto.size(); ii != ie; ++ii) {
1171 switch (Proto[ii]) {
1172 default: immidx += 1; break;
1173 case '2': immidx += 2; break;
1174 case '3': immidx += 3; break;
1175 case '4': immidx += 4; break;
1176 case 'i': ie = ii + 1; break;
1179 OS << "case ARM::BI__builtin_neon_" << MangleName(name, TypeVec[ti], ck)
1180 << ": i = " << immidx << "; " << rangestr << "; break;\n";