mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-19 01:34:32 +00:00
9e584b37b0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105496 91177308-0d34-0410-b5e6-96231b3b80d8
788 lines
18 KiB
C++
788 lines
18 KiB
C++
//===- NeonEmitter.cpp - Generate arm_neon.h for use with clang -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend is responsible for emitting arm_neon.h, which includes
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// a declaration and definition of each function specified by the ARM NEON
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// compiler interface. See ARM document DUI0348B.
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//
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//===----------------------------------------------------------------------===//
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#include "NeonEmitter.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include <string>
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using namespace llvm;
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static void ParseTypes(Record *r, std::string &s,
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SmallVectorImpl<StringRef> &TV) {
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const char *data = s.data();
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int len = 0;
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for (unsigned i = 0, e = s.size(); i != e; ++i, ++len) {
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if (data[len] == 'P' || data[len] == 'Q' || data[len] == 'U')
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continue;
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switch (data[len]) {
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case 'c':
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case 's':
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case 'i':
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case 'l':
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case 'h':
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case 'f':
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break;
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default:
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throw TGError(r->getLoc(),
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"Unexpected letter: " + std::string(data + len, 1));
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break;
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}
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TV.push_back(StringRef(data, len + 1));
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data += len + 1;
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len = -1;
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}
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}
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static char Widen(const char t) {
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switch (t) {
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case 'c':
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return 's';
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case 's':
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return 'i';
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case 'i':
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return 'l';
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default: throw "unhandled type in widen!";
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}
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return '\0';
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}
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static char Narrow(const char t) {
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switch (t) {
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case 's':
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return 'c';
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case 'i':
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return 's';
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case 'l':
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return 'i';
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default: throw "unhandled type in widen!";
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}
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return '\0';
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}
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static char ClassifyType(StringRef ty, bool &quad, bool &poly, bool &usgn) {
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unsigned off = 0;
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// remember quad.
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if (ty[off] == 'Q') {
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quad = true;
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++off;
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}
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// remember poly.
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if (ty[off] == 'P') {
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poly = true;
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++off;
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}
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// remember unsigned.
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if (ty[off] == 'U') {
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usgn = true;
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++off;
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}
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// base type to get the type string for.
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return ty[off];
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}
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static std::string TypeString(const char mod, StringRef typestr,
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bool ret = false) {
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bool quad = false;
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bool poly = false;
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bool usgn = false;
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bool scal = false;
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bool cnst = false;
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bool pntr = false;
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// base type to get the type string for.
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char type = ClassifyType(typestr, quad, poly, usgn);
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// Based on the modifying character, change the type and width if necessary.
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switch (mod) {
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case 'v':
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return "void";
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case 'i':
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return "int";
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case 't':
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if (poly) {
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poly = false;
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usgn = true;
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}
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break;
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case 'x':
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usgn = true;
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poly = false;
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if (type == 'f')
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type = 'i';
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break;
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case 'f':
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type = 'f';
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usgn = false;
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break;
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case 'w':
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type = Widen(type);
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quad = true;
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break;
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case 'n':
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type = Widen(type);
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break;
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case 'l':
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type = 'l';
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scal = true;
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usgn = true;
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break;
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case 's':
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scal = true;
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break;
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case 'k':
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quad = true;
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break;
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case 'c':
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cnst = true;
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case 'p':
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pntr = true;
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scal = true;
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break;
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case 'h':
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type = Narrow(type);
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break;
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case 'e':
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type = Narrow(type);
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usgn = true;
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break;
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default:
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break;
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}
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SmallString<128> s;
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if (ret)
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s += "__neon_";
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if (usgn)
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s.push_back('u');
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switch (type) {
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case 'c':
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s += poly ? "poly8" : "int8";
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if (scal)
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break;
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s += quad ? "x16" : "x8";
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break;
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case 's':
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s += poly ? "poly16" : "int16";
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if (scal)
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break;
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s += quad ? "x8" : "x4";
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break;
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case 'i':
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s += "int32";
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if (scal)
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break;
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s += quad ? "x4" : "x2";
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break;
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case 'l':
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s += "int64";
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if (scal)
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break;
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s += quad ? "x2" : "x1";
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break;
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case 'h':
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s += "float16";
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if (scal)
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break;
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s += quad ? "x8" : "x4";
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break;
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case 'f':
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s += "float32";
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if (scal)
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break;
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s += quad ? "x4" : "x2";
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break;
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default:
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throw "unhandled type!";
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break;
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}
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if (mod == '2')
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s += "x2";
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if (mod == '3')
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s += "x3";
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if (mod == '4')
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s += "x4";
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// Append _t, finishing the type string typedef type.
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s += "_t";
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if (cnst)
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s += " const";
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if (pntr)
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s += " *";
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return s.str();
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}
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static std::string BuiltinTypeString(const char mod, StringRef typestr,
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ClassKind ck, bool ret) {
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bool quad = false;
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bool poly = false;
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bool usgn = false;
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bool scal = false;
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bool cnst = false;
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bool pntr = false;
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if (mod == 'v')
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return "v";
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if (mod == 'i')
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return "i";
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// base type to get the type string for.
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char type = ClassifyType(typestr, quad, poly, usgn);
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// Based on the modifying character, change the type and width if necessary.
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switch (mod) {
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case 't':
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if (poly) {
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poly = false;
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usgn = true;
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}
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break;
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case 'x':
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usgn = true;
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poly = false;
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if (type == 'f')
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type = 'i';
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break;
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case 'f':
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type = 'f';
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usgn = false;
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break;
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case 'w':
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type = Widen(type);
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quad = true;
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break;
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case 'n':
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type = Widen(type);
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break;
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case 'l':
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type = 'l';
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scal = true;
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usgn = true;
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break;
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case 's':
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scal = true;
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break;
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case 'k':
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quad = true;
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break;
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case 'c':
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cnst = true;
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case 'p':
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type = 'v';
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usgn = false;
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poly = false;
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pntr = true;
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scal = true;
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break;
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case 'h':
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type = Narrow(type);
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break;
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case 'e':
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type = Narrow(type);
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usgn = true;
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break;
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default:
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break;
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}
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if (type == 'h') {
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type = 's';
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usgn = true;
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}
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usgn = usgn | poly | ((ck == ClassI || ck == ClassW) && scal && type != 'f');
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if (scal) {
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SmallString<128> s;
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if (usgn)
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s.push_back('U');
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if (type == 'l')
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s += "LLi";
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else
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s.push_back(type);
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if (cnst)
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s.push_back('C');
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if (pntr)
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s.push_back('*');
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return s.str();
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}
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// Since the return value must be one type, return a vector type of the
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// appropriate width which we will bitcast.
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if (ret) {
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if (mod == '2')
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return quad ? "V32c" : "V16c";
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if (mod == '3')
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return quad ? "V48c" : "V24c";
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if (mod == '4')
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return quad ? "V64c" : "V32c";
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return quad ? "V16c" : "V8c";
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}
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// Non-return array types are passed as individual vectors.
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if (mod == '2')
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return quad ? "V16cV16c" : "V8cV8c";
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if (mod == '3')
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return quad ? "V16cV16cV16c" : "V8cV8cV8c";
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if (mod == '4')
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return quad ? "V16cV16cV16cV16c" : "V8cV8cV8cV8c";
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return quad ? "V16c" : "V8c";
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}
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// Turn "vst2_lane" into "vst2q_lane_f32", etc.
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static std::string MangleName(const std::string &name, StringRef typestr,
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ClassKind ck) {
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bool quad = false;
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bool poly = false;
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bool usgn = false;
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char type = ClassifyType(typestr, quad, poly, usgn);
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std::string s = name;
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switch (type) {
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case 'c':
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switch (ck) {
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case ClassS: s += poly ? "_p8" : usgn ? "_u8" : "_s8"; break;
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case ClassI: s += "_i8"; break;
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case ClassW: s += "_8"; break;
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default: break;
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}
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break;
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case 's':
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switch (ck) {
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case ClassS: s += poly ? "_p16" : usgn ? "_u16" : "_s16"; break;
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case ClassI: s += "_i16"; break;
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case ClassW: s += "_16"; break;
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default: break;
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}
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break;
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case 'i':
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switch (ck) {
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case ClassS: s += usgn ? "_u32" : "_s32"; break;
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case ClassI: s += "_i32"; break;
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case ClassW: s += "_32"; break;
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default: break;
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}
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break;
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case 'l':
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switch (ck) {
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case ClassS: s += usgn ? "_u64" : "_s64"; break;
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case ClassI: s += "_i64"; break;
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case ClassW: s += "_64"; break;
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default: break;
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}
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break;
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case 'h':
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switch (ck) {
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case ClassS:
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case ClassI: s += "_f16"; break;
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case ClassW: s += "_16"; break;
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default: break;
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}
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break;
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case 'f':
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switch (ck) {
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case ClassS:
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case ClassI: s += "_f32"; break;
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case ClassW: s += "_32"; break;
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default: break;
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}
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break;
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default:
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throw "unhandled type!";
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break;
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}
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if (ck == ClassB)
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s += "_v";
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// Insert a 'q' before the first '_' character so that it ends up before
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// _lane or _n on vector-scalar operations.
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if (quad) {
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size_t pos = s.find('_');
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s = s.insert(pos, "q");
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}
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return s;
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}
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// Generate the string "(argtype a, argtype b, ...)"
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static std::string GenArgs(const std::string &proto, StringRef typestr) {
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char arg = 'a';
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std::string s;
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s += "(";
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for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
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s += TypeString(proto[i], typestr);
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s.push_back(' ');
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s.push_back(arg);
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if ((i + 1) < e)
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s += ", ";
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}
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s += ")";
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return s;
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}
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// Generate the definition for this intrinsic, e.g. "a + b" for OpAdd.
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// If structTypes is true, the NEON types are structs of vector types rather
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// than vector types, and the call becomes "a.val + b.val"
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static std::string GenOpString(OpKind op, const std::string &proto,
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StringRef typestr, bool structTypes = true) {
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std::string s("return ");
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std::string ts = TypeString(proto[0], typestr);
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if (structTypes)
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s += "(" + ts + "){";
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std::string a, b, c;
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if (proto.size() > 1)
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a = (structTypes && proto[1] != 'l') ? "a.val" : "a";
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b = structTypes ? "b.val" : "b";
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c = structTypes ? "c.val" : "c";
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switch(op) {
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case OpAdd:
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s += a + " + " + b;
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break;
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case OpSub:
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s += a + " - " + b;
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break;
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case OpMul:
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s += a + " * " + b;
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break;
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case OpMla:
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s += a + " + ( " + b + " * " + c + " )";
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break;
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case OpMls:
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s += a + " - ( " + b + " * " + c + " )";
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break;
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case OpEq:
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s += "(__neon_" + ts + ")(" + a + " == " + b + ")";
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break;
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case OpGe:
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s += "(__neon_" + ts + ")(" + a + " >= " + b + ")";
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break;
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case OpLe:
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s += "(__neon_" + ts + ")(" + a + " <= " + b + ")";
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break;
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case OpGt:
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s += "(__neon_" + ts + ")(" + a + " > " + b + ")";
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break;
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case OpLt:
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s += "(__neon_" + ts + ")(" + a + " < " + b + ")";
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break;
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case OpNeg:
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s += " -" + a;
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break;
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case OpNot:
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s += " ~" + a;
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break;
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case OpAnd:
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s += a + " & " + b;
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break;
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case OpOr:
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s += a + " | " + b;
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break;
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case OpXor:
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s += a + " ^ " + b;
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break;
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case OpAndNot:
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s += a + " & ~" + b;
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break;
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case OpOrNot:
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s += a + " | ~" + b;
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break;
|
|
case OpCast:
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s += "(__neon_" + ts + ")" + a;
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break;
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default:
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throw "unknown OpKind!";
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break;
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}
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|
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if (structTypes)
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s += "}";
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s += ";";
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return s;
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|
}
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|
|
|
// Generate the definition for this intrinsic, e.g. __builtin_neon_cls(a)
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|
// If structTypes is true, the NEON types are structs of vector types rather
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|
// than vector types, and the call becomes __builtin_neon_cls(a.val)
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|
static std::string GenBuiltin(const std::string &name, const std::string &proto,
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|
StringRef typestr, ClassKind ck,
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|
bool structTypes = true) {
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|
char arg = 'a';
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|
std::string s;
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|
bool unioning = (proto[0] == '2' || proto[0] == '3' || proto[0] == '4');
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|
|
// 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
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|
// special enums.
|
|
if (proto.find('s') == std::string::npos)
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ck = ClassB;
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|
|
if (proto[0] != 'v') {
|
|
if (unioning) {
|
|
s += "union { ";
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|
s += TypeString(proto[0], typestr, true) + " val; ";
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|
s += TypeString(proto[0], typestr, false) + " s; ";
|
|
s += "} r;";
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|
} else {
|
|
s += TypeString(proto[0], typestr);
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|
}
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|
|
s += " r; r";
|
|
if (structTypes && proto[0] != 's' && proto[0] != 'i' && proto[0] != 'l')
|
|
s += ".val";
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|
|
s += " = ";
|
|
}
|
|
|
|
s += "__builtin_neon_";
|
|
s += MangleName(name, typestr, ck);
|
|
s += "(";
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|
|
|
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
|
|
// 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.push_back(arg);
|
|
s += ".val[" + utostr(vi) + "]";
|
|
if ((vi + 1) < ve)
|
|
s += ", ";
|
|
}
|
|
if ((i + 1) < e)
|
|
s += ", ";
|
|
|
|
continue;
|
|
}
|
|
|
|
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 += ", ";
|
|
}
|
|
|
|
// Extra constant integer to hold type class enum for this function, e.g. s8
|
|
// FIXME: emit actual type num.
|
|
if (ck == ClassB)
|
|
s += ", 0";
|
|
|
|
s += ");";
|
|
|
|
if (proto[0] != 'v') {
|
|
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;
|
|
}
|
|
|
|
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 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";
|
|
|
|
// 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");
|
|
|
|
// 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], ClassS);
|
|
|
|
// Function arguments
|
|
OS << GenArgs(Proto, TypeVec[ti]);
|
|
|
|
// Definition.
|
|
OS << " { ";
|
|
|
|
if (k != OpNone) {
|
|
OS << GenOpString(k, Proto, TypeVec[ti]);
|
|
} else {
|
|
if (R->getSuperClasses().size() < 2)
|
|
throw TGError(R->getLoc(), "Builtin has no class kind");
|
|
|
|
ClassKind ck = ClassMap[R->getSuperClasses()[1]];
|
|
|
|
if (ck == ClassNone)
|
|
throw TGError(R->getLoc(), "Builtin has no class kind");
|
|
OS << GenBuiltin(name, Proto, TypeVec[ti], ck);
|
|
}
|
|
|
|
OS << " }\n";
|
|
}
|
|
OS << "\n";
|
|
}
|
|
OS << "#undef __ai\n\n";
|
|
OS << "#endif /* __ARM_NEON_H */\n";
|
|
}
|
|
|
|
void NeonEmitter::runHeader(raw_ostream &OS) {
|
|
std::vector<Record*> RV = Records.getAllDerivedDefinitions("Inst");
|
|
|
|
StringMap<OpKind> EmittedMap;
|
|
|
|
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");
|
|
|
|
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 bd = GenBuiltinDef(name, Proto, TypeVec[ti], ck);
|
|
if (EmittedMap.count(bd))
|
|
continue;
|
|
|
|
EmittedMap[bd] = OpNone;
|
|
OS << bd << "\n";
|
|
}
|
|
}
|
|
}
|