mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-23 17:32:49 +00:00
f69ead4651
Allows returning a PPC::Predicate from a function with a no-predicate value possible. Preparatory patch for fast-isel on PPC64 ELF. No behavioral change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183841 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
//===-- PPCPredicates.h - PPC Branch Predicate Information ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file describes the PowerPC branch predicates.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TARGET_POWERPC_PPCPREDICATES_H
|
|
#define LLVM_TARGET_POWERPC_PPCPREDICATES_H
|
|
|
|
// GCC #defines PPC on Linux but we use it as our namespace name
|
|
#undef PPC
|
|
|
|
// Generated files will use "namespace PPC". To avoid symbol clash,
|
|
// undefine PPC here. PPC may be predefined on some hosts.
|
|
#undef PPC
|
|
|
|
namespace llvm {
|
|
namespace PPC {
|
|
/// Predicate - These are "(BI << 5) | BO" for various predicates.
|
|
enum Predicate {
|
|
PRED_LT = (0 << 5) | 12,
|
|
PRED_LE = (1 << 5) | 4,
|
|
PRED_EQ = (2 << 5) | 12,
|
|
PRED_GE = (0 << 5) | 4,
|
|
PRED_GT = (1 << 5) | 12,
|
|
PRED_NE = (2 << 5) | 4,
|
|
PRED_UN = (3 << 5) | 12,
|
|
PRED_NU = (3 << 5) | 4,
|
|
PRED_BAD = 0
|
|
};
|
|
|
|
/// Invert the specified predicate. != -> ==, < -> >=.
|
|
Predicate InvertPredicate(Predicate Opcode);
|
|
|
|
/// Assume the condition register is set by MI(a,b), return the predicate if
|
|
/// we modify the instructions such that condition register is set by MI(b,a).
|
|
Predicate getSwappedPredicate(Predicate Opcode);
|
|
}
|
|
}
|
|
|
|
#endif
|