//===----------------------------------------------------------------------===//
#include "InstPrinter/WebAssemblyInstPrinter.h"
+#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
+#include "WebAssemblyMachineFunctionInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
-#include <cctype>
+#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
#define DEBUG_TYPE "asm-printer"
void WebAssemblyInstPrinter::printRegName(raw_ostream &OS,
unsigned RegNo) const {
- OS << getRegisterName(RegNo);
+ assert(RegNo != WebAssemblyFunctionInfo::UnusedReg);
+ // Note that there's an implicit get_local/set_local here!
+ OS << "$" << RegNo;
}
void WebAssemblyInstPrinter::printInst(const MCInst *MI, raw_ostream &OS,
StringRef Annot,
- const MCSubtargetInfo &STI) {
+ const MCSubtargetInfo & /*STI*/) {
+ // Print the instruction (this uses the AsmStrings from the .td files).
printInstruction(MI, OS);
+
+ // Print any additional variadic operands.
+ const MCInstrDesc &Desc = MII.get(MI->getOpcode());
+ if (Desc.isVariadic())
+ for (auto i = Desc.getNumOperands(), e = MI->getNumOperands(); i < e; ++i) {
+ if (i != 0)
+ OS << ", ";
+ printOperand(MI, i, OS);
+ }
+
+ // Print any added annotation.
printAnnotation(OS, Annot);
}
+
+static std::string toString(const APFloat &FP) {
+ static const size_t BufBytes = 128;
+ char buf[BufBytes];
+ if (FP.isNaN())
+ assert((FP.bitwiseIsEqual(APFloat::getQNaN(FP.getSemantics())) ||
+ FP.bitwiseIsEqual(
+ APFloat::getQNaN(FP.getSemantics(), /*Negative=*/true))) &&
+ "convertToHexString handles neither SNaN nor NaN payloads");
+ // Use C99's hexadecimal floating-point representation.
+ auto Written = FP.convertToHexString(
+ buf, /*hexDigits=*/0, /*upperCase=*/false, APFloat::rmNearestTiesToEven);
+ (void)Written;
+ assert(Written != 0);
+ assert(Written < BufBytes);
+ return buf;
+}
+
+void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
+ raw_ostream &O) {
+ const MCOperand &Op = MI->getOperand(OpNo);
+ if (Op.isReg()) {
+ unsigned WAReg = Op.getReg();
+ if (int(WAReg) >= 0)
+ printRegName(O, WAReg);
+ else if (OpNo >= MII.get(MI->getOpcode()).getNumDefs())
+ O << "$pop" << (WAReg & INT32_MAX);
+ else if (WAReg != WebAssemblyFunctionInfo::UnusedReg)
+ O << "$push" << (WAReg & INT32_MAX);
+ else
+ O << "$discard";
+ // Add a '=' suffix if this is a def.
+ if (OpNo < MII.get(MI->getOpcode()).getNumDefs())
+ O << '=';
+ } else if (Op.isImm()) {
+ switch (MI->getOpcode()) {
+ case WebAssembly::PARAM:
+ case WebAssembly::RESULT:
+ case WebAssembly::LOCAL:
+ O << WebAssembly::TypeToString(MVT::SimpleValueType(Op.getImm()));
+ break;
+ default:
+ O << Op.getImm();
+ break;
+ }
+ } else if (Op.isFPImm())
+ O << toString(APFloat(Op.getFPImm()));
+ else {
+ assert(Op.isExpr() && "unknown operand kind in printOperand");
+ Op.getExpr()->print(O, &MAI);
+ }
+}
+
+const char *llvm::WebAssembly::TypeToString(MVT Ty) {
+ switch (Ty.SimpleTy) {
+ case MVT::i32:
+ return "i32";
+ case MVT::i64:
+ return "i64";
+ case MVT::f32:
+ return "f32";
+ case MVT::f64:
+ return "f64";
+ default:
+ llvm_unreachable("unsupported type");
+ }
+}