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8bce43648b
For now this just handles simple comparisons of an ANDed value with zero. The CC value provides enough information to do any comparison for a 2-bit mask, and some nonzero comparisons with more populated masks, but that's all future work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189819 91177308-0d34-0410-b5e6-96231b3b80d8
112 lines
4.1 KiB
C++
112 lines
4.1 KiB
C++
//==- SystemZ.h - Top-Level Interface for SystemZ representation -*- 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 file contains the entry points for global functions defined in
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// the LLVM SystemZ backend.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SYSTEMZ_H
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#define SYSTEMZ_H
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#include "MCTargetDesc/SystemZMCTargetDesc.h"
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#include "llvm/Support/CodeGen.h"
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namespace llvm {
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class SystemZTargetMachine;
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class FunctionPass;
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namespace SystemZ {
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// Condition-code mask values.
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const unsigned CCMASK_0 = 1 << 3;
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const unsigned CCMASK_1 = 1 << 2;
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const unsigned CCMASK_2 = 1 << 1;
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const unsigned CCMASK_3 = 1 << 0;
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const unsigned CCMASK_ANY = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
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// Condition-code mask assignments for integer and floating-point
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// comparisons.
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const unsigned CCMASK_CMP_EQ = CCMASK_0;
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const unsigned CCMASK_CMP_LT = CCMASK_1;
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const unsigned CCMASK_CMP_GT = CCMASK_2;
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const unsigned CCMASK_CMP_NE = CCMASK_CMP_LT | CCMASK_CMP_GT;
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const unsigned CCMASK_CMP_LE = CCMASK_CMP_EQ | CCMASK_CMP_LT;
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const unsigned CCMASK_CMP_GE = CCMASK_CMP_EQ | CCMASK_CMP_GT;
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// Condition-code mask assignments for floating-point comparisons only.
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const unsigned CCMASK_CMP_UO = CCMASK_3;
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const unsigned CCMASK_CMP_O = CCMASK_ANY ^ CCMASK_CMP_UO;
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// All condition-code values produced by comparisons.
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const unsigned CCMASK_ICMP = CCMASK_0 | CCMASK_1 | CCMASK_2;
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const unsigned CCMASK_FCMP = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
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// Condition-code mask assignments for CS.
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const unsigned CCMASK_CS_EQ = CCMASK_0;
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const unsigned CCMASK_CS_NE = CCMASK_1;
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const unsigned CCMASK_CS = CCMASK_0 | CCMASK_1;
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// Condition-code mask assignments for a completed SRST loop.
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const unsigned CCMASK_SRST_FOUND = CCMASK_1;
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const unsigned CCMASK_SRST_NOTFOUND = CCMASK_2;
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const unsigned CCMASK_SRST = CCMASK_1 | CCMASK_2;
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// Condition-code mask assignments for TEST UNDER MASK.
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const unsigned CCMASK_TM_ALL_0 = CCMASK_0;
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const unsigned CCMASK_TM_MIXED_MSB_0 = CCMASK_1;
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const unsigned CCMASK_TM_MIXED_MSB_1 = CCMASK_2;
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const unsigned CCMASK_TM_ALL_1 = CCMASK_3;
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const unsigned CCMASK_TM_SOME_0 = CCMASK_TM_ALL_1 ^ CCMASK_ANY;
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const unsigned CCMASK_TM_SOME_1 = CCMASK_TM_ALL_0 ^ CCMASK_ANY;
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const unsigned CCMASK_TM_MSB_0 = CCMASK_0 | CCMASK_1;
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const unsigned CCMASK_TM_MSB_1 = CCMASK_2 | CCMASK_3;
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const unsigned CCMASK_TM = CCMASK_ANY;
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// Mask assignments for PFD.
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const unsigned PFD_READ = 1;
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const unsigned PFD_WRITE = 2;
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// Return true if Val fits an LLILL operand.
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static inline bool isImmLL(uint64_t Val) {
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return (Val & ~0x000000000000ffffULL) == 0;
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}
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// Return true if Val fits an LLILH operand.
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static inline bool isImmLH(uint64_t Val) {
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return (Val & ~0x00000000ffff0000ULL) == 0;
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}
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// Return true if Val fits an LLIHL operand.
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static inline bool isImmHL(uint64_t Val) {
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return (Val & ~0x00000ffff00000000ULL) == 0;
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}
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// Return true if Val fits an LLIHH operand.
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static inline bool isImmHH(uint64_t Val) {
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return (Val & ~0xffff000000000000ULL) == 0;
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}
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// Return true if Val fits an LLILF operand.
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static inline bool isImmLF(uint64_t Val) {
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return (Val & ~0x00000000ffffffffULL) == 0;
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}
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// Return true if Val fits an LLIHF operand.
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static inline bool isImmHF(uint64_t Val) {
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return (Val & ~0xffffffff00000000ULL) == 0;
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}
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}
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FunctionPass *createSystemZISelDag(SystemZTargetMachine &TM,
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CodeGenOpt::Level OptLevel);
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FunctionPass *createSystemZElimComparePass(SystemZTargetMachine &TM);
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FunctionPass *createSystemZLongBranchPass(SystemZTargetMachine &TM);
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} // end namespace llvm;
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#endif
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