mirror of
https://github.com/c64scene-ar/llvm-6502.git
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6ee9b5a57d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4353 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
//===-- X86RegisterInfo.def - X86 Register Information ----------*- C++ -*-===//
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//
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// This file describes all of the registers that the X86 backend uses. It relies
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// on an external 'R' macro being defined that takes the arguments specified
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// below, and is used to make all of the information relevant to registers be in
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// one place.
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//
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//===----------------------------------------------------------------------===//
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// NOTE: No include guards desired
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#ifndef R
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#errror "Must define R macro before including X86/X86RegisterInfo.def!"
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#endif
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// Arguments passed into the R macro
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// #1: Enum Name - This ends up being a symbol in the X86 namespace
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// #2: Register name - The name of the register as used by the gnu assembler
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// #3: Register Flags - A bitfield of flags or'd together from the
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// MRegisterInfo.h file.
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// #4: Target Specific Flags - Another bitfield containing X86 specific flags
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// as neccesary.
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// The first register must always be a 'noop' register for all backends. This
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// is used as the destination register for instructions that do not produce a
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// value. Some frontends may use this as an operand register to mean special
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// things, for example, the Sparc backend uses R#0 to mean %g0 which always
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// PRODUCES the value 0. The X86 backend does not use this value as an operand
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// register.
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//
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R(NoReg, "none", 0, 0)
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// 32 bit registers, ordered as the processor does...
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R(EAX, "eax", MRF::INT32, 0)
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R(ECX, "ecx", MRF::INT32, 0)
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R(EDX, "edx", MRF::INT32, 0)
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R(EBX, "ebx", MRF::INT32, 0)
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R(ESP, "esp", MRF::INT32, 0)
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R(EBP, "ebp", MRF::INT32, 0)
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R(ESI, "esi", MRF::INT32, 0)
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R(EDI, "edi", MRF::INT32, 0)
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// 16 bit registers, aliased with the corresponding 32 bit registers above
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R(AX, "ax", MRF::INT16, 0)
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R(CX, "cx", MRF::INT16, 0)
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R(DX, "dx", MRF::INT16, 0)
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R(BX, "bx", MRF::INT16, 0)
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R(SP, "sp", MRF::INT16, 0)
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R(BP, "bp", MRF::INT16, 0)
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R(SI, "si", MRF::INT16, 0)
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R(DI, "di", MRF::INT16, 0)
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// 8 bit registers aliased with registers above as well
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R(AL, "al", MRF::INT8, 0)
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R(CL, "cl", MRF::INT8, 0)
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R(DL, "dl", MRF::INT8, 0)
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R(BL, "bl", MRF::INT8, 0)
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R(AH, "ah", MRF::INT8, 0)
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R(CH, "ch", MRF::INT8, 0)
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R(DH, "dh", MRF::INT8, 0)
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R(BH, "bh", MRF::INT8, 0)
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// Flags, Segment registers, etc...
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// We are now done with the R macro
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#undef R
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