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Make the AsmWriter a first-class tblgen object. Allow targets to specify

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name of the generated asmwriter class, and the name of the format string.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15747 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-08-14 22:50:53 +00:00
parent ca068e861b
commit 175580c0f3
5 changed files with 70 additions and 23 deletions
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53
lib/Target/Target.td
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@@ -133,20 +133,6 @@ class Instruction {
}
// InstrInfo - This class should only be instantiated once to provide parameters
// which are global to the the target machine.
//
class InstrInfo {
Instruction PHIInst;
// If the target wants to associate some target-specific information with each
// instruction, it should provide these two lists to indicate how to assemble
// the target specific information into the 32 bits available.
//
list<string> TSFlagsFields = [];
list<int> TSFlagsShifts = [];
}
/// ops definition - This is just a simple marker used to identify the operands
/// list for an instruction. This should be used like this:
/// (ops R32:$dst, R32:$src) or something similar.
@@ -166,6 +152,40 @@ def i16imm : Operand<i16>;
def i32imm : Operand<i32>;
def i64imm : Operand<i64>;
// InstrInfo - This class should only be instantiated once to provide parameters
// which are global to the the target machine.
//
class InstrInfo {
Instruction PHIInst;
// If the target wants to associate some target-specific information with each
// instruction, it should provide these two lists to indicate how to assemble
// the target specific information into the 32 bits available.
//
list<string> TSFlagsFields = [];
list<int> TSFlagsShifts = [];
}
//===----------------------------------------------------------------------===//
// AsmWriter - This class can be implemented by targets that need to customize
// the format of the .s file writer.
//
// Subtargets can have multiple different asmwriters (e.g. AT&T vs Intel syntax
// on X86 for example).
//
class AsmWriter {
// AsmWriterClassName - This specifies the suffix to use for the asmwriter
// class. Generated AsmWriter classes are always prefixed with the target
// name.
string AsmWriterClassName = "AsmPrinter";
// InstFormatName - AsmWriters can specify the name of the format string to
// print instructions with.
string InstFormatName = "AsmString";
}
def DefaultAsmWriter : AsmWriter;
//===----------------------------------------------------------------------===//
// Target - This class contains the "global" target information
//
@@ -178,8 +198,11 @@ class Target {
// this target. Typically this is an i32 or i64 type.
ValueType PointerType;
// InstructionSet - Instruction set description for this target
// InstructionSet - Instruction set description for this target.
InstrInfo InstructionSet;
// AssemblyWriter - The AsmWriter instance to use for this target.
AsmWriter AssemblyWriter = DefaultAsmWriter;
}