SystemZ.h revision 251607 
1//==- SystemZ.h - Top-Level Interface for SystemZ representation -*- C++ -*-==//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the entry points for global functions defined in
11// the LLVM SystemZ backend.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef SYSTEMZ_H
16#define SYSTEMZ_H
17
18#include "MCTargetDesc/SystemZMCTargetDesc.h"
19#include "llvm/Support/CodeGen.h"
20
21namespace llvm {
22  class SystemZTargetMachine;
23  class FunctionPass;
24
25  namespace SystemZ {
26    // Condition-code mask values.
27    const unsigned CCMASK_0 = 1 << 3;
28    const unsigned CCMASK_1 = 1 << 2;
29    const unsigned CCMASK_2 = 1 << 1;
30    const unsigned CCMASK_3 = 1 << 0;
31    const unsigned CCMASK_ANY = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
32
33    // Condition-code mask assignments for floating-point comparisons.
34    const unsigned CCMASK_CMP_EQ = CCMASK_0;
35    const unsigned CCMASK_CMP_LT = CCMASK_1;
36    const unsigned CCMASK_CMP_GT = CCMASK_2;
37    const unsigned CCMASK_CMP_UO = CCMASK_3;
38    const unsigned CCMASK_CMP_NE = CCMASK_CMP_LT | CCMASK_CMP_GT;
39    const unsigned CCMASK_CMP_LE = CCMASK_CMP_EQ | CCMASK_CMP_LT;
40    const unsigned CCMASK_CMP_GE = CCMASK_CMP_EQ | CCMASK_CMP_GT;
41    const unsigned CCMASK_CMP_O  = CCMASK_ANY ^ CCMASK_CMP_UO;
42
43    // Return true if Val fits an LLILL operand.
44    static inline bool isImmLL(uint64_t Val) {
45      return (Val & ~0x000000000000ffffULL) == 0;
46    }
47
48    // Return true if Val fits an LLILH operand.
49    static inline bool isImmLH(uint64_t Val) {
50      return (Val & ~0x00000000ffff0000ULL) == 0;
51    }
52
53    // Return true if Val fits an LLIHL operand.
54    static inline bool isImmHL(uint64_t Val) {
55      return (Val & ~0x00000ffff00000000ULL) == 0;
56    }
57
58    // Return true if Val fits an LLIHH operand.
59    static inline bool isImmHH(uint64_t Val) {
60      return (Val & ~0xffff000000000000ULL) == 0;
61    }
62
63    // Return true if Val fits an LLILF operand.
64    static inline bool isImmLF(uint64_t Val) {
65      return (Val & ~0x00000000ffffffffULL) == 0;
66    }
67
68    // Return true if Val fits an LLIHF operand.
69    static inline bool isImmHF(uint64_t Val) {
70      return (Val & ~0xffffffff00000000ULL) == 0;
71    }
72  }
73
74  FunctionPass *createSystemZISelDag(SystemZTargetMachine &TM,
75                                     CodeGenOpt::Level OptLevel);
76} // end namespace llvm;
77#endif
78