xref: /freebsd-src/contrib/llvm-project/llvm/lib/Target/PowerPC/MCTargetDesc/PPCPredicates.cpp (revision 5f757f3ff9144b609b3c433dfd370cc6bdc191ad) 
1*0b57cec5SDimitry Andric //===-- PPCPredicates.cpp - PPC Branch Predicate Information --------------===//
2*0b57cec5SDimitry Andric //
3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*0b57cec5SDimitry Andric //
7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
8*0b57cec5SDimitry Andric //
9*0b57cec5SDimitry Andric // This file implements the PowerPC branch predicates.
10*0b57cec5SDimitry Andric //
11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
12*0b57cec5SDimitry Andric 
13*0b57cec5SDimitry Andric #include "PPCPredicates.h"
14*0b57cec5SDimitry Andric #include "llvm/Support/ErrorHandling.h"
15*0b57cec5SDimitry Andric using namespace llvm;
16*0b57cec5SDimitry Andric 
InvertPredicate(PPC::Predicate Opcode)17*0b57cec5SDimitry Andric PPC::Predicate PPC::InvertPredicate(PPC::Predicate Opcode) {
18*0b57cec5SDimitry Andric   switch (Opcode) {
19*0b57cec5SDimitry Andric   case PPC::PRED_EQ: return PPC::PRED_NE;
20*0b57cec5SDimitry Andric   case PPC::PRED_NE: return PPC::PRED_EQ;
21*0b57cec5SDimitry Andric   case PPC::PRED_LT: return PPC::PRED_GE;
22*0b57cec5SDimitry Andric   case PPC::PRED_GE: return PPC::PRED_LT;
23*0b57cec5SDimitry Andric   case PPC::PRED_GT: return PPC::PRED_LE;
24*0b57cec5SDimitry Andric   case PPC::PRED_LE: return PPC::PRED_GT;
25*0b57cec5SDimitry Andric   case PPC::PRED_NU: return PPC::PRED_UN;
26*0b57cec5SDimitry Andric   case PPC::PRED_UN: return PPC::PRED_NU;
27*0b57cec5SDimitry Andric   case PPC::PRED_EQ_MINUS: return PPC::PRED_NE_PLUS;
28*0b57cec5SDimitry Andric   case PPC::PRED_NE_MINUS: return PPC::PRED_EQ_PLUS;
29*0b57cec5SDimitry Andric   case PPC::PRED_LT_MINUS: return PPC::PRED_GE_PLUS;
30*0b57cec5SDimitry Andric   case PPC::PRED_GE_MINUS: return PPC::PRED_LT_PLUS;
31*0b57cec5SDimitry Andric   case PPC::PRED_GT_MINUS: return PPC::PRED_LE_PLUS;
32*0b57cec5SDimitry Andric   case PPC::PRED_LE_MINUS: return PPC::PRED_GT_PLUS;
33*0b57cec5SDimitry Andric   case PPC::PRED_NU_MINUS: return PPC::PRED_UN_PLUS;
34*0b57cec5SDimitry Andric   case PPC::PRED_UN_MINUS: return PPC::PRED_NU_PLUS;
35*0b57cec5SDimitry Andric   case PPC::PRED_EQ_PLUS: return PPC::PRED_NE_MINUS;
36*0b57cec5SDimitry Andric   case PPC::PRED_NE_PLUS: return PPC::PRED_EQ_MINUS;
37*0b57cec5SDimitry Andric   case PPC::PRED_LT_PLUS: return PPC::PRED_GE_MINUS;
38*0b57cec5SDimitry Andric   case PPC::PRED_GE_PLUS: return PPC::PRED_LT_MINUS;
39*0b57cec5SDimitry Andric   case PPC::PRED_GT_PLUS: return PPC::PRED_LE_MINUS;
40*0b57cec5SDimitry Andric   case PPC::PRED_LE_PLUS: return PPC::PRED_GT_MINUS;
41*0b57cec5SDimitry Andric   case PPC::PRED_NU_PLUS: return PPC::PRED_UN_MINUS;
42*0b57cec5SDimitry Andric   case PPC::PRED_UN_PLUS: return PPC::PRED_NU_MINUS;
43*0b57cec5SDimitry Andric 
44*0b57cec5SDimitry Andric   // Simple predicates for single condition-register bits.
45*0b57cec5SDimitry Andric   case PPC::PRED_BIT_SET:   return PPC::PRED_BIT_UNSET;
46*0b57cec5SDimitry Andric   case PPC::PRED_BIT_UNSET: return PPC::PRED_BIT_SET;
47*0b57cec5SDimitry Andric   }
48*0b57cec5SDimitry Andric   llvm_unreachable("Unknown PPC branch opcode!");
49*0b57cec5SDimitry Andric }
50*0b57cec5SDimitry Andric 
getSwappedPredicate(PPC::Predicate Opcode)51*0b57cec5SDimitry Andric PPC::Predicate PPC::getSwappedPredicate(PPC::Predicate Opcode) {
52*0b57cec5SDimitry Andric   switch (Opcode) {
53*0b57cec5SDimitry Andric   case PPC::PRED_EQ: return PPC::PRED_EQ;
54*0b57cec5SDimitry Andric   case PPC::PRED_NE: return PPC::PRED_NE;
55*0b57cec5SDimitry Andric   case PPC::PRED_LT: return PPC::PRED_GT;
56*0b57cec5SDimitry Andric   case PPC::PRED_GE: return PPC::PRED_LE;
57*0b57cec5SDimitry Andric   case PPC::PRED_GT: return PPC::PRED_LT;
58*0b57cec5SDimitry Andric   case PPC::PRED_LE: return PPC::PRED_GE;
59*0b57cec5SDimitry Andric   case PPC::PRED_NU: return PPC::PRED_NU;
60*0b57cec5SDimitry Andric   case PPC::PRED_UN: return PPC::PRED_UN;
61*0b57cec5SDimitry Andric   case PPC::PRED_EQ_MINUS: return PPC::PRED_EQ_MINUS;
62*0b57cec5SDimitry Andric   case PPC::PRED_NE_MINUS: return PPC::PRED_NE_MINUS;
63*0b57cec5SDimitry Andric   case PPC::PRED_LT_MINUS: return PPC::PRED_GT_MINUS;
64*0b57cec5SDimitry Andric   case PPC::PRED_GE_MINUS: return PPC::PRED_LE_MINUS;
65*0b57cec5SDimitry Andric   case PPC::PRED_GT_MINUS: return PPC::PRED_LT_MINUS;
66*0b57cec5SDimitry Andric   case PPC::PRED_LE_MINUS: return PPC::PRED_GE_MINUS;
67*0b57cec5SDimitry Andric   case PPC::PRED_NU_MINUS: return PPC::PRED_NU_MINUS;
68*0b57cec5SDimitry Andric   case PPC::PRED_UN_MINUS: return PPC::PRED_UN_MINUS;
69*0b57cec5SDimitry Andric   case PPC::PRED_EQ_PLUS: return PPC::PRED_EQ_PLUS;
70*0b57cec5SDimitry Andric   case PPC::PRED_NE_PLUS: return PPC::PRED_NE_PLUS;
71*0b57cec5SDimitry Andric   case PPC::PRED_LT_PLUS: return PPC::PRED_GT_PLUS;
72*0b57cec5SDimitry Andric   case PPC::PRED_GE_PLUS: return PPC::PRED_LE_PLUS;
73*0b57cec5SDimitry Andric   case PPC::PRED_GT_PLUS: return PPC::PRED_LT_PLUS;
74*0b57cec5SDimitry Andric   case PPC::PRED_LE_PLUS: return PPC::PRED_GE_PLUS;
75*0b57cec5SDimitry Andric   case PPC::PRED_NU_PLUS: return PPC::PRED_NU_PLUS;
76*0b57cec5SDimitry Andric   case PPC::PRED_UN_PLUS: return PPC::PRED_UN_PLUS;
77*0b57cec5SDimitry Andric 
78*0b57cec5SDimitry Andric   case PPC::PRED_BIT_SET:
79*0b57cec5SDimitry Andric   case PPC::PRED_BIT_UNSET:
80*0b57cec5SDimitry Andric     llvm_unreachable("Invalid use of bit predicate code");
81*0b57cec5SDimitry Andric   }
82*0b57cec5SDimitry Andric   llvm_unreachable("Unknown PPC branch opcode!");
83*0b57cec5SDimitry Andric }
84*0b57cec5SDimitry Andric 
85