86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
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//===-- PPCPredicates.cpp - PPC Branch Predicate Information --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PowerPC branch predicates.
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//
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//===----------------------------------------------------------------------===//
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#include "PPCPredicates.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <cassert>
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using namespace llvm;
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PPC::Predicate PPC::InvertPredicate(PPC::Predicate Opcode) {
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switch (Opcode) {
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case PPC::PRED_EQ: return PPC::PRED_NE;
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case PPC::PRED_NE: return PPC::PRED_EQ;
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case PPC::PRED_LT: return PPC::PRED_GE;
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case PPC::PRED_GE: return PPC::PRED_LT;
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case PPC::PRED_GT: return PPC::PRED_LE;
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case PPC::PRED_LE: return PPC::PRED_GT;
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case PPC::PRED_NU: return PPC::PRED_UN;
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case PPC::PRED_UN: return PPC::PRED_NU;
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case PPC::PRED_EQ_MINUS: return PPC::PRED_NE_PLUS;
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case PPC::PRED_NE_MINUS: return PPC::PRED_EQ_PLUS;
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case PPC::PRED_LT_MINUS: return PPC::PRED_GE_PLUS;
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case PPC::PRED_GE_MINUS: return PPC::PRED_LT_PLUS;
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case PPC::PRED_GT_MINUS: return PPC::PRED_LE_PLUS;
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case PPC::PRED_LE_MINUS: return PPC::PRED_GT_PLUS;
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case PPC::PRED_NU_MINUS: return PPC::PRED_UN_PLUS;
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case PPC::PRED_UN_MINUS: return PPC::PRED_NU_PLUS;
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case PPC::PRED_EQ_PLUS: return PPC::PRED_NE_MINUS;
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case PPC::PRED_NE_PLUS: return PPC::PRED_EQ_MINUS;
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case PPC::PRED_LT_PLUS: return PPC::PRED_GE_MINUS;
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case PPC::PRED_GE_PLUS: return PPC::PRED_LT_MINUS;
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case PPC::PRED_GT_PLUS: return PPC::PRED_LE_MINUS;
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case PPC::PRED_LE_PLUS: return PPC::PRED_GT_MINUS;
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case PPC::PRED_NU_PLUS: return PPC::PRED_UN_MINUS;
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case PPC::PRED_UN_PLUS: return PPC::PRED_NU_MINUS;
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// Simple predicates for single condition-register bits.
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case PPC::PRED_BIT_SET: return PPC::PRED_BIT_UNSET;
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case PPC::PRED_BIT_UNSET: return PPC::PRED_BIT_SET;
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}
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llvm_unreachable("Unknown PPC branch opcode!");
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}
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PPC::Predicate PPC::getSwappedPredicate(PPC::Predicate Opcode) {
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switch (Opcode) {
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case PPC::PRED_EQ: return PPC::PRED_EQ;
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case PPC::PRED_NE: return PPC::PRED_NE;
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case PPC::PRED_LT: return PPC::PRED_GT;
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case PPC::PRED_GE: return PPC::PRED_LE;
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case PPC::PRED_GT: return PPC::PRED_LT;
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case PPC::PRED_LE: return PPC::PRED_GE;
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case PPC::PRED_NU: return PPC::PRED_NU;
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case PPC::PRED_UN: return PPC::PRED_UN;
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case PPC::PRED_EQ_MINUS: return PPC::PRED_EQ_MINUS;
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case PPC::PRED_NE_MINUS: return PPC::PRED_NE_MINUS;
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case PPC::PRED_LT_MINUS: return PPC::PRED_GT_MINUS;
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case PPC::PRED_GE_MINUS: return PPC::PRED_LE_MINUS;
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case PPC::PRED_GT_MINUS: return PPC::PRED_LT_MINUS;
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case PPC::PRED_LE_MINUS: return PPC::PRED_GE_MINUS;
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case PPC::PRED_NU_MINUS: return PPC::PRED_NU_MINUS;
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case PPC::PRED_UN_MINUS: return PPC::PRED_UN_MINUS;
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case PPC::PRED_EQ_PLUS: return PPC::PRED_EQ_PLUS;
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case PPC::PRED_NE_PLUS: return PPC::PRED_NE_PLUS;
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case PPC::PRED_LT_PLUS: return PPC::PRED_GT_PLUS;
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case PPC::PRED_GE_PLUS: return PPC::PRED_LE_PLUS;
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case PPC::PRED_GT_PLUS: return PPC::PRED_LT_PLUS;
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case PPC::PRED_LE_PLUS: return PPC::PRED_GE_PLUS;
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case PPC::PRED_NU_PLUS: return PPC::PRED_NU_PLUS;
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case PPC::PRED_UN_PLUS: return PPC::PRED_UN_PLUS;
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case PPC::PRED_BIT_SET:
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case PPC::PRED_BIT_UNSET:
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llvm_unreachable("Invalid use of bit predicate code");
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}
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llvm_unreachable("Unknown PPC branch opcode!");
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}
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