mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-20 09:30:43 +00:00
162d3ba464
generic vector operators rather than __builtin_neon_* git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105380 91177308-0d34-0410-b5e6-96231b3b80d8
537 lines
12 KiB
C++
537 lines
12 KiB
C++
//===- NeonEmitter.cpp - Generate arm_neon.h for use with clang -*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This tablegen backend is responsible for emitting arm_neon.h, which includes
|
|
// a declaration and definition of each function specified by the ARM NEON
|
|
// compiler interface. See ARM document DUI0348B.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "NeonEmitter.h"
|
|
#include "Record.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
|
|
};
|
|
|
|
static void ParseTypes(Record *r, std::string &s,
|
|
SmallVectorImpl<StringRef> &TV) {
|
|
const char *data = s.data();
|
|
int len = 0;
|
|
|
|
for (unsigned i = 0, e = s.size(); i != e; ++i, ++len) {
|
|
if (data[len] == 'P' || data[len] == 'Q' || data[len] == 'U')
|
|
continue;
|
|
|
|
switch (data[len]) {
|
|
case 'c':
|
|
case 's':
|
|
case 'i':
|
|
case 'l':
|
|
case 'h':
|
|
case 'f':
|
|
break;
|
|
default:
|
|
throw TGError(r->getLoc(),
|
|
"Unexpected letter: " + std::string(data + len, 1));
|
|
break;
|
|
}
|
|
TV.push_back(StringRef(data, len + 1));
|
|
data += len + 1;
|
|
len = -1;
|
|
}
|
|
}
|
|
|
|
static char Widen(const char t) {
|
|
switch (t) {
|
|
case 'c':
|
|
return 's';
|
|
case 's':
|
|
return 'i';
|
|
case 'i':
|
|
return 'l';
|
|
default: throw "unhandled type in widen!";
|
|
}
|
|
return '\0';
|
|
}
|
|
|
|
static char ClassifyType(StringRef ty, bool &quad, bool &poly, bool &usgn) {
|
|
unsigned off = 0;
|
|
|
|
// remember quad.
|
|
if (ty[off] == 'Q') {
|
|
quad = true;
|
|
++off;
|
|
}
|
|
|
|
// remember poly.
|
|
if (ty[off] == 'P') {
|
|
poly = true;
|
|
++off;
|
|
}
|
|
|
|
// remember unsigned.
|
|
if (ty[off] == 'U') {
|
|
usgn = true;
|
|
++off;
|
|
}
|
|
|
|
// base type to get the type string for.
|
|
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.
|
|
switch (mod) {
|
|
case 'v':
|
|
return "void";
|
|
case 'i':
|
|
return "int";
|
|
case 't':
|
|
if (poly) {
|
|
poly = false;
|
|
usgn = true;
|
|
}
|
|
break;
|
|
case 'x':
|
|
usgn = true;
|
|
poly = false;
|
|
if (type == 'f')
|
|
type = 'i';
|
|
break;
|
|
case 'f':
|
|
type = 'f';
|
|
usgn = false;
|
|
break;
|
|
case 'w':
|
|
type = Widen(type);
|
|
quad = true;
|
|
break;
|
|
case 'n':
|
|
type = Widen(type);
|
|
break;
|
|
case 'l':
|
|
type = 'l';
|
|
scal = true;
|
|
usgn = true;
|
|
break;
|
|
case 's':
|
|
scal = true;
|
|
break;
|
|
case 'k':
|
|
quad = true;
|
|
break;
|
|
case 'c':
|
|
cnst = true;
|
|
case 'p':
|
|
pntr = true;
|
|
scal = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
SmallString<128> s;
|
|
|
|
if (usgn)
|
|
s.push_back('u');
|
|
|
|
switch (type) {
|
|
case 'c':
|
|
s += poly ? "poly8" : "int8";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x16" : "x8";
|
|
break;
|
|
case 's':
|
|
s += poly ? "poly16" : "int16";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x8" : "x4";
|
|
break;
|
|
case 'i':
|
|
s += "int32";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x4" : "x2";
|
|
break;
|
|
case 'l':
|
|
s += "int64";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x2" : "x1";
|
|
break;
|
|
case 'h':
|
|
s += "float16";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x8" : "x4";
|
|
break;
|
|
case 'f':
|
|
s += "float32";
|
|
if (scal)
|
|
break;
|
|
s += quad ? "x4" : "x2";
|
|
break;
|
|
default:
|
|
throw "unhandled type!";
|
|
break;
|
|
}
|
|
|
|
if (mod == '2')
|
|
s += "x2";
|
|
if (mod == '3')
|
|
s += "x3";
|
|
if (mod == '4')
|
|
s += "x4";
|
|
|
|
// Append _t, finishing the type string typedef type.
|
|
s += "_t";
|
|
|
|
if (cnst)
|
|
s += " const";
|
|
|
|
if (pntr)
|
|
s += " *";
|
|
|
|
return s.str();
|
|
}
|
|
|
|
// Turn "vst2_lane" into "vst2q_lane_f32", etc.
|
|
static std::string MangleName(const std::string &name, StringRef typestr) {
|
|
bool quad = false;
|
|
bool poly = false;
|
|
bool usgn = false;
|
|
char type = ClassifyType(typestr, quad, poly, usgn);
|
|
|
|
std::string s = name;
|
|
|
|
switch (type) {
|
|
case 'c':
|
|
s += poly ? "_p8" : usgn ? "_u8" : "_s8";
|
|
break;
|
|
case 's':
|
|
s += poly ? "_p16" : usgn ? "_u16" : "_s16";
|
|
break;
|
|
case 'i':
|
|
s += usgn ? "_u32" : "_s32";
|
|
break;
|
|
case 'l':
|
|
s += usgn ? "_u64" : "_s64";
|
|
break;
|
|
case 'h':
|
|
s += "_f16";
|
|
break;
|
|
case 'f':
|
|
s += "_f32";
|
|
break;
|
|
default:
|
|
throw "unhandled type!";
|
|
break;
|
|
}
|
|
|
|
// Insert a 'q' before the first '_' character so that it ends up before
|
|
// _lane or _n on vector-scalar operations.
|
|
if (quad) {
|
|
size_t pos = s.find('_');
|
|
s = s.insert(pos, "q");
|
|
}
|
|
return s;
|
|
}
|
|
|
|
// Generate the string "(argtype a, argtype b, ...)"
|
|
static std::string GenArgs(const std::string &proto, StringRef typestr) {
|
|
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(' ');
|
|
s.push_back(arg);
|
|
if ((i + 1) < e)
|
|
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 ");
|
|
std::string ts = TypeString(proto[0], typestr);
|
|
if (structTypes)
|
|
s += "(" + ts + "){";
|
|
|
|
std::string a = structTypes ? "a.val" : "a";
|
|
std::string b = structTypes ? "b.val" : "b";
|
|
std::string c = structTypes ? "c.val" : "c";
|
|
|
|
switch(op) {
|
|
case OpAdd:
|
|
s += a + " + " + b;
|
|
break;
|
|
case OpSub:
|
|
s += a + " - " + b;
|
|
break;
|
|
case OpMul:
|
|
s += a + " * " + b;
|
|
break;
|
|
case OpMla:
|
|
s += a + " + ( " + b + " * " + c + " )";
|
|
break;
|
|
case OpMls:
|
|
s += a + " - ( " + b + " * " + c + " )";
|
|
break;
|
|
case OpEq:
|
|
s += "(__neon_" + ts + ")(" + a + " == " + b + ")";
|
|
break;
|
|
case OpGe:
|
|
s += "(__neon_" + ts + ")(" + a + " >= " + b + ")";
|
|
break;
|
|
case OpLe:
|
|
s += "(__neon_" + ts + ")(" + a + " <= " + b + ")";
|
|
break;
|
|
case OpGt:
|
|
s += "(__neon_" + ts + ")(" + a + " > " + b + ")";
|
|
break;
|
|
case OpLt:
|
|
s += "(__neon_" + ts + ")(" + a + " < " + b + ")";
|
|
break;
|
|
case OpNeg:
|
|
s += " -" + a;
|
|
break;
|
|
case OpNot:
|
|
s += " ~" + a;
|
|
break;
|
|
case OpAnd:
|
|
s += a + " & " + b;
|
|
break;
|
|
case OpOr:
|
|
s += a + " | " + b;
|
|
break;
|
|
case OpXor:
|
|
s += a + " ^ " + b;
|
|
break;
|
|
case OpAndNot:
|
|
s += a + " & ~" + b;
|
|
break;
|
|
case OpOrNot:
|
|
s += a + " | ~" + b;
|
|
break;
|
|
default:
|
|
throw "unknown OpKind!";
|
|
break;
|
|
}
|
|
|
|
if (structTypes)
|
|
s += "}";
|
|
s += ";";
|
|
return s;
|
|
}
|
|
|
|
// 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, bool structTypes = true) {
|
|
char arg = 'a';
|
|
std::string s;
|
|
|
|
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 += "){";
|
|
}
|
|
}
|
|
|
|
s += "__builtin_neon_";
|
|
s += name;
|
|
s += "(";
|
|
|
|
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
|
|
s.push_back(arg);
|
|
if (structTypes && proto[i] != 's' && proto[i] != 'i' && proto[i] != 'l' &&
|
|
proto[i] != 'p' && proto[i] != 'c') {
|
|
s += ".val";
|
|
}
|
|
if ((i + 1) < e)
|
|
s += ", ";
|
|
}
|
|
|
|
s += ")";
|
|
if (proto[0] != 'v' && structTypes)
|
|
s += "}";
|
|
s += ";";
|
|
return s;
|
|
}
|
|
|
|
void NeonEmitter::run(raw_ostream &OS) {
|
|
EmitSourceFileHeader("ARM NEON Header", OS);
|
|
|
|
// FIXME: emit license into file?
|
|
|
|
OS << "#ifndef __ARM_NEON_H\n";
|
|
OS << "#define __ARM_NEON_H\n\n";
|
|
|
|
OS << "#ifndef __ARM_NEON__\n";
|
|
OS << "#error \"NEON support not enabled\"\n";
|
|
OS << "#endif\n\n";
|
|
|
|
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";
|
|
}
|
|
OS << "\n";
|
|
|
|
// Emit struct typedefs.
|
|
for (unsigned vi = 1; vi != 5; ++vi) {
|
|
for (unsigned i = 0, e = TDTypeVec.size(); i != e; ++i) {
|
|
std::string ts = TypeString('d', TDTypeVec[i]);
|
|
std::string vs = (vi > 1) ? TypeString('0' + vi, TDTypeVec[i]) : ts;
|
|
OS << "typedef struct __" << vs << " {\n";
|
|
OS << " __neon_" << ts << " val";
|
|
if (vi > 1)
|
|
OS << "[" << utostr(vi) << "]";
|
|
OS << ";\n} " << vs << ";\n\n";
|
|
}
|
|
}
|
|
|
|
OS << "#define __ai static __attribute__((__always_inline__))\n\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;
|
|
|
|
// Unique the return+pattern types, and assign them.
|
|
for (unsigned i = 0, e = RV.size(); i != e; ++i) {
|
|
Record *R = RV[i];
|
|
std::string name = LowercaseString(R->getName());
|
|
std::string Proto = R->getValueAsString("Prototype");
|
|
std::string Types = R->getValueAsString("Types");
|
|
|
|
SmallVector<StringRef, 16> TypeVec;
|
|
ParseTypes(R, Types, TypeVec);
|
|
|
|
OpKind k = OpMap[R->getValueAsDef("Operand")->getName()];
|
|
|
|
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]);
|
|
|
|
// Function name with type suffix
|
|
OS << " " << MangleName(name, TypeVec[ti]);
|
|
|
|
// Function arguments
|
|
OS << GenArgs(Proto, TypeVec[ti]);
|
|
|
|
// Definition.
|
|
OS << " { ";
|
|
|
|
if (k != OpNone)
|
|
OS << GenOpString(k, Proto, TypeVec[ti]);
|
|
else
|
|
OS << GenBuiltin(name, Proto, TypeVec[ti]);
|
|
|
|
OS << " }\n";
|
|
}
|
|
OS << "\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.
|
|
|
|
OS << "#endif /* __ARM_NEON_H */\n";
|
|
}
|