From a9a5c537ad0bf5ab68ed79c163500a4fcb3fc3ff Mon Sep 17 00:00:00 2001 From: Jack Carter Date: Tue, 9 Apr 2013 23:19:50 +0000 Subject: Mips specific inline asm operand modifier 'D' Modifier 'D' is to use the second word of a double integer. We had previously implemented the pure register varient of the modifier and this patch implements the memory reference. #include "stdio.h" int b[8] = {0,1,2,3,4,5,6,7}; void main() { int i; // The first word. Notice, no 'D' {asm ( "lw %0,%1;" : "=r" (i) : "m" (*(b+4)) );} printf("%d\n",i); // The second word {asm ( "lw %0,%D1;" : "=r" (i) : "m" (*(b+4)) );} printf("%d\n",i); } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179135 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/Mips/MipsAsmPrinter.cpp | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'lib/Target/Mips/MipsAsmPrinter.cpp') diff --git a/lib/Target/Mips/MipsAsmPrinter.cpp b/lib/Target/Mips/MipsAsmPrinter.cpp index e0ddade15f..f4f71cbccb 100644 --- a/lib/Target/Mips/MipsAsmPrinter.cpp +++ b/lib/Target/Mips/MipsAsmPrinter.cpp @@ -423,12 +423,18 @@ bool MipsAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum, unsigned AsmVariant, const char *ExtraCode, raw_ostream &O) { - if (ExtraCode && ExtraCode[0]) - return true; // Unknown modifier. + int Offset = 0; + // Currently we are expecting either no ExtraCode or 'D' + if (ExtraCode) { + if (ExtraCode[0] == 'D') + Offset = 4; + else + return true; // Unknown modifier. + } const MachineOperand &MO = MI->getOperand(OpNum); assert(MO.isReg() && "unexpected inline asm memory operand"); - O << "0($" << MipsInstPrinter::getRegisterName(MO.getReg()) << ")"; + O << Offset << "($" << MipsInstPrinter::getRegisterName(MO.getReg()) << ")"; return false; } -- cgit v1.2.3-70-g09d2