SystemZ.h revision c2b840cb7c58e59c68aaa589841c41fb272df66d 
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 integer and floating-point
34    // comparisons.
35    const unsigned CCMASK_CMP_EQ = CCMASK_0;
36    const unsigned CCMASK_CMP_LT = CCMASK_1;
37    const unsigned CCMASK_CMP_GT = CCMASK_2;
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
42    // Condition-code mask assignments for floating-point comparisons only.
43    const unsigned CCMASK_CMP_UO = CCMASK_3;
44    const unsigned CCMASK_CMP_O  = CCMASK_ANY ^ CCMASK_CMP_UO;
45
46    // All condition-code values produced by comparisons.
47    const unsigned CCMASK_ICMP = CCMASK_0 | CCMASK_1 | CCMASK_2;
48    const unsigned CCMASK_FCMP = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
49
50    // Condition-code mask assignments for CS.
51    const unsigned CCMASK_CS_EQ = CCMASK_0;
52    const unsigned CCMASK_CS_NE = CCMASK_1;
53    const unsigned CCMASK_CS    = CCMASK_0 | CCMASK_1;
54
55    // Condition-code mask assignments for a completed SRST loop.
56    const unsigned CCMASK_SRST_FOUND    = CCMASK_1;
57    const unsigned CCMASK_SRST_NOTFOUND = CCMASK_2;
58    const unsigned CCMASK_SRST          = CCMASK_1 | CCMASK_2;
59
60    // Condition-code mask assignments for TEST UNDER MASK.
61    const unsigned CCMASK_TM_ALL_0       = CCMASK_0;
62    const unsigned CCMASK_TM_MIXED_MSB_0 = CCMASK_1;
63    const unsigned CCMASK_TM_MIXED_MSB_1 = CCMASK_2;
64    const unsigned CCMASK_TM_ALL_1       = CCMASK_3;
65    const unsigned CCMASK_TM_SOME_0      = CCMASK_TM_ALL_1 ^ CCMASK_ANY;
66    const unsigned CCMASK_TM_SOME_1      = CCMASK_TM_ALL_0 ^ CCMASK_ANY;
67    const unsigned CCMASK_TM_MSB_0       = CCMASK_0 | CCMASK_1;
68    const unsigned CCMASK_TM_MSB_1       = CCMASK_2 | CCMASK_3;
69    const unsigned CCMASK_TM             = CCMASK_ANY;
70
71    // Mask assignments for PFD.
72    const unsigned PFD_READ  = 1;
73    const unsigned PFD_WRITE = 2;
74
75    // Return true if Val fits an LLILL operand.
76    static inline bool isImmLL(uint64_t Val) {
77      return (Val & ~0x000000000000ffffULL) == 0;
78    }
79
80    // Return true if Val fits an LLILH operand.
81    static inline bool isImmLH(uint64_t Val) {
82      return (Val & ~0x00000000ffff0000ULL) == 0;
83    }
84
85    // Return true if Val fits an LLIHL operand.
86    static inline bool isImmHL(uint64_t Val) {
87      return (Val & ~0x00000ffff00000000ULL) == 0;
88    }
89
90    // Return true if Val fits an LLIHH operand.
91    static inline bool isImmHH(uint64_t Val) {
92      return (Val & ~0xffff000000000000ULL) == 0;
93    }
94
95    // Return true if Val fits an LLILF operand.
96    static inline bool isImmLF(uint64_t Val) {
97      return (Val & ~0x00000000ffffffffULL) == 0;
98    }
99
100    // Return true if Val fits an LLIHF operand.
101    static inline bool isImmHF(uint64_t Val) {
102      return (Val & ~0xffffffff00000000ULL) == 0;
103    }
104  }
105
106  FunctionPass *createSystemZISelDag(SystemZTargetMachine &TM,
107                                     CodeGenOpt::Level OptLevel);
108  FunctionPass *createSystemZElimComparePass(SystemZTargetMachine &TM);
109  FunctionPass *createSystemZShortenInstPass(SystemZTargetMachine &TM);
110  FunctionPass *createSystemZLongBranchPass(SystemZTargetMachine &TM);
111} // end namespace llvm;
112#endif
113