SystemZ.h revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
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 {
22class SystemZTargetMachine;
23class FunctionPass;
24
25namespace SystemZ {
26// Condition-code mask values.
27const unsigned CCMASK_0 = 1 << 3;
28const unsigned CCMASK_1 = 1 << 2;
29const unsigned CCMASK_2 = 1 << 1;
30const unsigned CCMASK_3 = 1 << 0;
31const unsigned CCMASK_ANY = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
32
33// Condition-code mask assignments for integer and floating-point
34// comparisons.
35const unsigned CCMASK_CMP_EQ = CCMASK_0;
36const unsigned CCMASK_CMP_LT = CCMASK_1;
37const unsigned CCMASK_CMP_GT = CCMASK_2;
38const unsigned CCMASK_CMP_NE = CCMASK_CMP_LT | CCMASK_CMP_GT;
39const unsigned CCMASK_CMP_LE = CCMASK_CMP_EQ | CCMASK_CMP_LT;
40const unsigned CCMASK_CMP_GE = CCMASK_CMP_EQ | CCMASK_CMP_GT;
41
42// Condition-code mask assignments for floating-point comparisons only.
43const unsigned CCMASK_CMP_UO = CCMASK_3;
44const unsigned CCMASK_CMP_O  = CCMASK_ANY ^ CCMASK_CMP_UO;
45
46// All condition-code values produced by comparisons.
47const unsigned CCMASK_ICMP = CCMASK_0 | CCMASK_1 | CCMASK_2;
48const unsigned CCMASK_FCMP = CCMASK_0 | CCMASK_1 | CCMASK_2 | CCMASK_3;
49
50// Condition-code mask assignments for CS.
51const unsigned CCMASK_CS_EQ = CCMASK_0;
52const unsigned CCMASK_CS_NE = CCMASK_1;
53const unsigned CCMASK_CS    = CCMASK_0 | CCMASK_1;
54
55// Condition-code mask assignments for a completed SRST loop.
56const unsigned CCMASK_SRST_FOUND    = CCMASK_1;
57const unsigned CCMASK_SRST_NOTFOUND = CCMASK_2;
58const unsigned CCMASK_SRST          = CCMASK_1 | CCMASK_2;
59
60// Condition-code mask assignments for TEST UNDER MASK.
61const unsigned CCMASK_TM_ALL_0       = CCMASK_0;
62const unsigned CCMASK_TM_MIXED_MSB_0 = CCMASK_1;
63const unsigned CCMASK_TM_MIXED_MSB_1 = CCMASK_2;
64const unsigned CCMASK_TM_ALL_1       = CCMASK_3;
65const unsigned CCMASK_TM_SOME_0      = CCMASK_TM_ALL_1 ^ CCMASK_ANY;
66const unsigned CCMASK_TM_SOME_1      = CCMASK_TM_ALL_0 ^ CCMASK_ANY;
67const unsigned CCMASK_TM_MSB_0       = CCMASK_0 | CCMASK_1;
68const unsigned CCMASK_TM_MSB_1       = CCMASK_2 | CCMASK_3;
69const unsigned CCMASK_TM             = CCMASK_ANY;
70
71// The position of the low CC bit in an IPM result.
72const unsigned IPM_CC = 28;
73
74// Mask assignments for PFD.
75const unsigned PFD_READ  = 1;
76const unsigned PFD_WRITE = 2;
77
78// Return true if Val fits an LLILL operand.
79static inline bool isImmLL(uint64_t Val) {
80  return (Val & ~0x000000000000ffffULL) == 0;
81}
82
83// Return true if Val fits an LLILH operand.
84static inline bool isImmLH(uint64_t Val) {
85  return (Val & ~0x00000000ffff0000ULL) == 0;
86}
87
88// Return true if Val fits an LLIHL operand.
89static inline bool isImmHL(uint64_t Val) {
90  return (Val & ~0x00000ffff00000000ULL) == 0;
91}
92
93// Return true if Val fits an LLIHH operand.
94static inline bool isImmHH(uint64_t Val) {
95  return (Val & ~0xffff000000000000ULL) == 0;
96}
97
98// Return true if Val fits an LLILF operand.
99static inline bool isImmLF(uint64_t Val) {
100  return (Val & ~0x00000000ffffffffULL) == 0;
101}
102
103// Return true if Val fits an LLIHF operand.
104static inline bool isImmHF(uint64_t Val) {
105  return (Val & ~0xffffffff00000000ULL) == 0;
106}
107} // end namespace SystemZ
108
109FunctionPass *createSystemZISelDag(SystemZTargetMachine &TM,
110                                   CodeGenOpt::Level OptLevel);
111FunctionPass *createSystemZElimComparePass(SystemZTargetMachine &TM);
112FunctionPass *createSystemZShortenInstPass(SystemZTargetMachine &TM);
113FunctionPass *createSystemZLongBranchPass(SystemZTargetMachine &TM);
114} // end namespace llvm
115
116#endif
117